path: root/docs/rabbitmqctl.1.xml

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<refentry lang="en">
  <refentryinfo>
    <productname>RabbitMQ Server</productname>
    <authorgroup>
      <corpauthor>The RabbitMQ Team &lt;<ulink url="mailto:info@rabbitmq.com"><email>info@rabbitmq.com</email></ulink>&gt;</corpauthor>
    </authorgroup>
  </refentryinfo>

  <refmeta>
    <refentrytitle>rabbitmqctl</refentrytitle>
    <manvolnum>1</manvolnum>
    <refmiscinfo class="manual">RabbitMQ Service</refmiscinfo>
  </refmeta>

  <refnamediv>
    <refname>rabbitmqctl</refname>
    <refpurpose>command line tool for managing a RabbitMQ broker</refpurpose>
  </refnamediv>

  <refsynopsisdiv>
    <cmdsynopsis>
      <command>rabbitmqctl</command>
      <arg choice="opt">-n <replaceable>node</replaceable></arg>
      <arg choice="opt">-q</arg>
      <arg choice="req"><replaceable>command</replaceable></arg>
      <arg choice="opt" rep="repeat"><replaceable>command options</replaceable></arg>
    </cmdsynopsis>
  </refsynopsisdiv>

  <refsect1>
    <title>Description</title>
    <para>
      RabbitMQ is an implementation of AMQP, the emerging standard for high
      performance enterprise messaging. The RabbitMQ server is a robust and
      scalable implementation of an AMQP broker.
    </para>
    <para>
      <command>rabbitmqctl</command> is a command line tool for managing a
      RabbitMQ broker. It performs all actions by connecting to one of the
      broker's nodes.
    </para>
    <para>
      Diagnostic information is displayed if the broker was not
      running, could not be reached, or rejected the connection due to
      mismatching Erlang cookies.
    </para>
  </refsect1>

  <refsect1>
    <title>Options</title>
    <variablelist>
      <varlistentry>
        <term><cmdsynopsis><arg choice="opt">-n <replaceable>node</replaceable></arg></cmdsynopsis></term>
        <listitem>
          <para role="usage">
            Default node is "rabbit@server", where server is the local host.  On
            a host named "server.example.com", the node name of the RabbitMQ
            Erlang node will usually be rabbit@server (unless RABBITMQ_NODENAME
            has been set to some non-default value at broker startup time).  The
            output of <command>hostname -s</command> is usually the correct suffix to use after the
            "@" sign. See rabbitmq-server(1) for details of configuring the
            RabbitMQ broker.
          </para>
        </listitem>
      </varlistentry>
      <varlistentry>
        <term><cmdsynopsis><arg choice="opt">-q</arg></cmdsynopsis></term>
        <listitem>
          <para role="usage">
            Quiet output mode is selected with the "-q" flag. Informational
            messages are suppressed when quiet mode is in effect.
          </para>
        </listitem>
      </varlistentry>
    </variablelist>
  </refsect1>

  <refsect1>
    <title>Commands</title>

    <refsect2>
      <title>Application and Cluster Management</title>

      <variablelist>
        <varlistentry>
          <term><cmdsynopsis><command>stop</command> <arg choice="opt"><replaceable>pid_file</replaceable></arg></cmdsynopsis></term>
          <listitem>
            <para>
              Stops the Erlang node on which RabbitMQ is running. To
              restart the node follow the instructions for <citetitle>Running
              the Server</citetitle> in the <ulink url="http://www.rabbitmq.com/install.html">installation
              guide</ulink>.
            </para>
            <para>
              If a <option>pid_file</option> is specified, also waits
              for the process specified there to terminate.  See the
              description of the <option>wait</option> command below
              for details on this file.
            </para>
            <para role="example-prefix">For example:</para>
            <screen role="example">rabbitmqctl stop</screen>
            <para role="example">
              This command instructs the RabbitMQ node to terminate.
            </para>
          </listitem>
        </varlistentry>

        <varlistentry id="stop_app">
          <term><cmdsynopsis><command>stop_app</command></cmdsynopsis></term>
          <listitem>
            <para>
              Stops the RabbitMQ application, leaving the Erlang node
              running.
            </para>
            <para>
              This command is typically run prior to performing other
              management actions that require the RabbitMQ application
              to be stopped, e.g. <link
                    linkend="reset"><command>reset</command></link>.
            </para>
            <para role="example-prefix">For example:</para>
            <screen role="example">rabbitmqctl stop_app</screen>
            <para role="example">
              This command instructs the RabbitMQ node to stop the
              RabbitMQ application.
            </para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term><cmdsynopsis><command>start_app</command></cmdsynopsis></term>
          <listitem>
            <para>
              Starts the RabbitMQ application.
            </para>
            <para>
              This command is typically run after performing other
              management actions that required the RabbitMQ application
              to be stopped, e.g. <link
                    linkend="reset"><command>reset</command></link>.
            </para>
            <para role="example-prefix">For example:</para>
            <screen role="example">rabbitmqctl start_app</screen>
            <para role="example">
              This command instructs the RabbitMQ node to start the
              RabbitMQ application.
            </para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term><cmdsynopsis><command>wait</command> <arg choice="req"><replaceable>pid_file</replaceable></arg></cmdsynopsis></term>
          <listitem>
            <para>
              Wait for the RabbitMQ application to start.
            </para>
            <para>
              This command will wait for the RabbitMQ application to
              start at the node. It will wait for the pid file to
              be created, then for a process with a pid specified in the
              pid file to start, and then for the RabbitMQ application
              to start in that process. It will fail if the process
              terminates without starting the RabbitMQ application.
            </para>
            <para>
              A suitable pid file is created by
              the <command>rabbitmq-server</command> script. By
              default this is located in the Mnesia directory. Modify
              the <command>RABBITMQ_PID_FILE</command> environment
              variable to change the location.
            </para>
            <para role="example-prefix">For example:</para>
            <screen role="example">rabbitmqctl wait /var/run/rabbitmq/pid</screen>
            <para role="example">
              This command will return when the RabbitMQ node has
              started up.
            </para>
          </listitem>
        </varlistentry>

        <varlistentry id="reset">
          <term><cmdsynopsis><command>reset</command></cmdsynopsis></term>
          <listitem>
            <para>
              Return a RabbitMQ node to its virgin state.
            </para>
            <para>
              Removes the node from any cluster it belongs to, removes
              all data from the management database, such as configured
              users and vhosts, and deletes all persistent
              messages.
            </para>
            <para>
              For <command>reset</command> and <command>force_reset</command> to
              succeed the RabbitMQ application must have been stopped,
              e.g. with <link linkend="stop_app"><command>stop_app</command></link>.
            </para>
            <para role="example-prefix">For example:</para>
            <screen role="example">rabbitmqctl reset</screen>
            <para role="example">
              This command resets the RabbitMQ node.
            </para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term><cmdsynopsis><command>force_reset</command></cmdsynopsis></term>
          <listitem>
            <para>
              Forcefully return a RabbitMQ node to its virgin state.
            </para>
            <para>
              The <command>force_reset</command> command differs from
              <command>reset</command> in that it resets the node
              unconditionally, regardless of the current management
              database state and cluster configuration. It should only
              be used as a last resort if the database or cluster
              configuration has been corrupted.
            </para>
            <para>
              For <command>reset</command> and <command>force_reset</command> to
              succeed the RabbitMQ application must have been stopped,
              e.g. with <link linkend="stop_app"><command>stop_app</command></link>.
            </para>
            <para role="example-prefix">For example:</para>
            <screen role="example">rabbitmqctl force_reset</screen>
            <para role="example">
              This command resets the RabbitMQ node.
            </para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term><cmdsynopsis><command>rotate_logs</command> <arg choice="req"><replaceable>suffix</replaceable></arg></cmdsynopsis></term>
          <listitem>
            <para>
              Instruct the RabbitMQ node to rotate the log files.
            </para>
            <para>
              The RabbitMQ broker appends the contents of its log
              files to files with names composed of the original name
              and the suffix, and then resumes logging to freshly
              created files at the original location. I.e. effectively
              the current log contents are moved to the end of the
              suffixed files.
            </para>
            <para>
              When the target files do not exist they are created.
              When no <option>suffix</option> is specified, the empty
              log files are simply created at the original location;
              no rotation takes place.
            </para>
            <para role="example-prefix">For example:</para>
            <screen role="example">rabbitmqctl rotate_logs .1</screen>
            <para role="example">
              This command instructs the RabbitMQ node to append the contents
              of the log files to files with names consisting of the original logs'
              names and ".1" suffix, e.g. rabbit@mymachine.log.1 and
              rabbit@mymachine-sasl.log.1. Finally, logging resumes to
              fresh files at the old locations.
            </para>
          </listitem>
        </varlistentry>
      </variablelist>
    </refsect2>

    <refsect2>
      <title>Cluster management</title>

      <variablelist>
        <varlistentry id="join_cluster">
          <term><cmdsynopsis><command>join_cluster</command> <arg choice="req"><replaceable>clusternode</replaceable></arg><arg choice="opt"><replaceable>--ram</replaceable></arg></cmdsynopsis></term>
          <listitem>
            <variablelist>
              <varlistentry>
                <term>clusternode</term>
                <listitem><para>Node to cluster with.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term><cmdsynopsis><arg choice="opt">--ram</arg></cmdsynopsis></term>
                <listitem>
                  <para>
                    If provided, the node will join the cluster as a RAM node.
                  </para>
                </listitem>
              </varlistentry>
            </variablelist>
            <para>
              Instruct the node to become a member of the cluster that the
              specified node is in. Before clustering, the node is reset, so be
              careful when using this command. For this command to succeed the
              RabbitMQ application must have been stopped, e.g. with <link
              linkend="stop_app"><command>stop_app</command></link>.
            </para>
            <para>
              Cluster nodes can be of two types: disc or RAM. Disc nodes
              replicate data in RAM and on disc, thus providing redundancy in
              the event of node failure and recovery from global events such
              as power failure across all nodes. RAM nodes replicate data in
              RAM only (with the exception of queue contents, which can reside
              on disc if the queue is persistent or too big to fit in memory)
              and are mainly used for scalability. RAM nodes are more
              performant only when managing resources (e.g. adding/removing
              queues, exchanges, or bindings). A cluster must always have at
              least one disc node, and usually should have more than one.
            </para>
            <para>
              The node will be a disc node by default. If you wish to
              create a RAM node, provide the <command>--ram</command> flag.
            </para>
            <para>
              After executing the <command>cluster</command> command, whenever
              the RabbitMQ application is started on the current node it will
              attempt to connect to the nodes that were in the cluster when the
              node went down.
            </para>
            <para>
              To leave a cluster, <command>reset</command> the node. You can
              also remove nodes remotely with the
              <command>forget_cluster_node</command> command.
            </para>
            <para>
              For more details see the <ulink
              url="http://www.rabbitmq.com/clustering.html">clustering
              guide</ulink>.
            </para>
            <para role="example-prefix">For example:</para>
            <screen role="example">rabbitmqctl join_cluster hare@elena --ram</screen>
            <para role="example">
              This command instructs the RabbitMQ node to join the cluster that
              <command>hare@elena</command> is part of, as a ram node.
            </para>
          </listitem>
        </varlistentry>
        <varlistentry>
          <term><cmdsynopsis><command>cluster_status</command></cmdsynopsis></term>
          <listitem>
            <para>
              Displays all the nodes in the cluster grouped by node type,
              together with the currently running nodes.
            </para>
            <para role="example-prefix">For example:</para>
            <screen role="example">rabbitmqctl cluster_status</screen>
            <para role="example">
              This command displays the nodes in the cluster.
            </para>
          </listitem>
        </varlistentry>
        <varlistentry>
          <term><cmdsynopsis><command>change_cluster_node_type</command> <arg choice="req">disc | ram</arg></cmdsynopsis>
          </term>
          <listitem>
            <para>
              Changes the type of the cluster node. The node must be stopped for
              this operation to succeed, and when turning a node into a RAM node
              the node must not be the only disc node in the cluster.
            </para>
            <para role="example-prefix">For example:</para>
            <screen role="example">rabbitmqctl change_cluster_node_type disc</screen>
            <para role="example">
              This command will turn a RAM node into a disc node.
            </para>
          </listitem>
        </varlistentry>
        <varlistentry>
          <term><cmdsynopsis><command>forget_cluster_node</command> <arg choice="opt">--offline</arg></cmdsynopsis></term>
          <listitem>
            <variablelist>
              <varlistentry>
                <term><cmdsynopsis><arg choice="opt">--offline</arg></cmdsynopsis></term>
                <listitem>
                  <para>
                    Enables node removal from an offline node. This is only
                    useful in the situation where all the nodes are offline and
                    the last node to go down cannot be brought online, thus
                    preventing the whole cluster from starting. It should not be
                    used in any other circumstances since it can lead to
                    inconsistencies.
                  </para>
                </listitem>
              </varlistentry>
            </variablelist>
            <para>
              Removes a cluster node remotely. The node that is being removed
              must be offline, while the node we are removing from must be
              online, except when using the <command>--offline</command> flag.
            </para>
            <para role="example-prefix">For example:</para>
            <screen role="example">rabbitmqctl -n hare@mcnulty forget_cluster_node rabbit@stringer</screen>
            <para role="example">
              This command will remove the node
              <command>rabbit@stringer</command> from the node
              <command>hare@mcnulty</command>.
            </para>
          </listitem>
        </varlistentry>
        <varlistentry>
          <term><cmdsynopsis><command>update_cluster_nodes</command> <arg choice="req">clusternode</arg></cmdsynopsis>
          </term>
          <listitem>
            <variablelist>
              <varlistentry>
                <term>clusternode</term>
                <listitem>
                  <para>
                    The node to consult for up to date information.
                  </para>
                </listitem>
              </varlistentry>
            </variablelist>
            <para>
              Instructs an already clustered node to contact
              <command>clusternode</command> to cluster when waking up. This is
              different from <command>join_cluster</command> since it does not
              join any cluster - it checks that the node is already in a cluster
              with <command>clusternode</command>.
            </para>
            <para>
              The need for this command is motivated by the fact that clusters
              can change while a node is offline. Consider the situation in
              which node A and B are clustered. A goes down, C clusters with B,
              and then B leaves the cluster. When A wakes up, it'll try to
              contact B, but this will fail since B is not in the cluster
              anymore. <command>update_cluster_nodes -n A C</command> will solve
              this situation.
            </para>
          </listitem>
        </varlistentry>
      </variablelist>
    </refsect2>

    <refsect2>
      <title>User management</title>
      <para>
        Note that <command>rabbitmqctl</command> manages the RabbitMQ
        internal user database. Users from any alternative
        authentication backend will not be visible
        to <command>rabbitmqctl</command>.
      </para>
      <variablelist>
        <varlistentry>
          <term><cmdsynopsis><command>add_user</command> <arg choice="req"><replaceable>username</replaceable></arg> <arg choice="req"><replaceable>password</replaceable></arg></cmdsynopsis></term>
          <listitem>
            <variablelist>
              <varlistentry>
                <term>username</term>
                <listitem><para>The name of the user to create.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>password</term>
                <listitem><para>The password the created user will use to log in to the broker.</para></listitem>
              </varlistentry>
            </variablelist>
            <para role="example-prefix">For example:</para>
            <screen role="example">rabbitmqctl add_user tonyg changeit</screen>
            <para role="example">
              This command instructs the RabbitMQ broker to create a
              (non-administrative) user named <command>tonyg</command> with
              (initial) password
              <command>changeit</command>.
            </para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term><cmdsynopsis><command>delete_user</command> <arg choice="req"><replaceable>username</replaceable></arg></cmdsynopsis></term>
          <listitem>
            <variablelist>
              <varlistentry>
                <term>username</term>
                <listitem><para>The name of the user to delete.</para></listitem>
              </varlistentry>
            </variablelist>
            <para role="example-prefix">For example:</para>
            <screen role="example">rabbitmqctl delete_user tonyg</screen>
            <para role="example">
              This command instructs the RabbitMQ broker to delete the
              user named <command>tonyg</command>.
            </para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term><cmdsynopsis><command>change_password</command> <arg choice="req"><replaceable>username</replaceable></arg> <arg choice="req"><replaceable>newpassword</replaceable></arg></cmdsynopsis></term>
          <listitem>
            <variablelist>
              <varlistentry>
                <term>username</term>
                <listitem><para>The name of the user whose password is to be changed.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>newpassword</term>
                <listitem><para>The new password for the user.</para></listitem>
              </varlistentry>
            </variablelist>
            <para role="example-prefix">For example:</para>
            <screen role="example">rabbitmqctl change_password tonyg newpass</screen>
            <para role="example">
              This command instructs the RabbitMQ broker to change the
              password for the user named <command>tonyg</command> to
              <command>newpass</command>.
            </para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term><cmdsynopsis><command>clear_password</command> <arg choice="req"><replaceable>username</replaceable></arg></cmdsynopsis></term>
          <listitem>
            <variablelist>
              <varlistentry>
                <term>username</term>
                <listitem><para>The name of the user whose password is to be cleared.</para></listitem>
              </varlistentry>
            </variablelist>
            <para role="example-prefix">For example:</para>
            <screen role="example">rabbitmqctl clear_password tonyg</screen>
            <para role="example">
              This command instructs the RabbitMQ broker to clear the
              password for the user named
              <command>tonyg</command>. This user now cannot log in with a password (but may be able to through e.g. SASL EXTERNAL if configured).
            </para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term><cmdsynopsis><command>set_user_tags</command> <arg choice="req"><replaceable>username</replaceable></arg> <arg choice="req"><replaceable>tag</replaceable> ...</arg></cmdsynopsis></term>
          <listitem>
            <variablelist>
              <varlistentry>
                <term>username</term>
                <listitem><para>The name of the user whose tags are to
                be set.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>tag</term>
                <listitem><para>Zero, one or more tags to set. Any
                existing tags will be removed.</para></listitem>
              </varlistentry>
            </variablelist>
            <para role="example-prefix">For example:</para>
            <screen role="example">rabbitmqctl set_user_tags tonyg administrator</screen>
            <para role="example">
              This command instructs the RabbitMQ broker to ensure the user
               named <command>tonyg</command> is an administrator. This has no
               effect when the user logs in via AMQP, but can be used to permit
               the user to manage users, virtual hosts and permissions when the
               user logs in via some other means (for example with the
               management plugin).
            </para>
            <screen role="example">rabbitmqctl set_user_tags tonyg</screen>
            <para role="example">
              This command instructs the RabbitMQ broker to remove any
              tags from the user named <command>tonyg</command>.
            </para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term><cmdsynopsis><command>list_users</command></cmdsynopsis></term>
          <listitem>
            <para>
              Lists users. Each result row will contain the user name
              followed by a list of the tags set for that user.
            </para>
            <para role="example-prefix">For example:</para>
            <screen role="example">rabbitmqctl list_users</screen>
            <para role="example">
              This command instructs the RabbitMQ broker to list all
              users.
            </para>
          </listitem>
        </varlistentry>
      </variablelist>
    </refsect2>

    <refsect2>
      <title>Access control</title>
      <para>
        Note that <command>rabbitmqctl</command> manages the RabbitMQ
        internal user database. Permissions for users from any
        alternative authorisation backend will not be visible
        to <command>rabbitmqctl</command>.
      </para>
      <variablelist>
        <varlistentry>
          <term><cmdsynopsis><command>add_vhost</command> <arg choice="req"><replaceable>vhostpath</replaceable></arg></cmdsynopsis></term>
          <listitem>
            <variablelist>
              <varlistentry>
                <term>vhostpath</term>
                <listitem><para>The name of the virtual host entry to create.</para></listitem>
              </varlistentry>
            </variablelist>
            <para>
              Creates a virtual host.
            </para>
            <para role="example-prefix">For example:</para>
            <screen role="example">rabbitmqctl add_vhost test</screen>
            <para role="example">
              This command instructs the RabbitMQ broker to create a new
              virtual host called <command>test</command>.
            </para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term><cmdsynopsis><command>delete_vhost</command> <arg choice="req"><replaceable>vhostpath</replaceable></arg></cmdsynopsis></term>
          <listitem>
            <variablelist>
              <varlistentry>
                <term>vhostpath</term>
                <listitem><para>The name of the virtual host entry to delete.</para></listitem>
              </varlistentry>
            </variablelist>
            <para>
              Deletes a virtual host.
            </para>
            <para>
              Deleting a virtual host deletes all its exchanges,
              queues, bindings, user permissions, parameters and policies.
            </para>
            <para role="example-prefix">For example:</para>
            <screen role="example">rabbitmqctl delete_vhost test</screen>
            <para role="example">
              This command instructs the RabbitMQ broker to delete the
              virtual host called <command>test</command>.
            </para>
          </listitem>
        </varlistentry>

        <varlistentry role="usage-has-option-list">
          <term><cmdsynopsis><command>list_vhosts</command> <arg choice="opt" role="usage-option-list"><replaceable>vhostinfoitem</replaceable> ...</arg></cmdsynopsis></term>
          <listitem>
            <para>
              Lists virtual hosts.
            </para>
            <para>
              The <command>vhostinfoitem</command> parameter is used to indicate which
              virtual host information items to include in the results. The column order in the
              results will match the order of the parameters.
              <command>vhostinfoitem</command> can take any value from
              the list that follows:
            </para>
            <variablelist>
              <varlistentry>
                <term>name</term>
                <listitem><para>The name of the virtual host with non-ASCII characters escaped as in C.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>tracing</term>
                <listitem><para>Whether tracing is enabled for this virtual host.</para></listitem>
              </varlistentry>
            </variablelist>
            <para>
              If no <command>vhostinfoitem</command>s are specified
              then the vhost name is displayed.
            </para>
            <para role="example-prefix">For example:</para>
            <screen role="example">rabbitmqctl list_vhosts name tracing</screen>
            <para role="example">
              This command instructs the RabbitMQ broker to list all
              virtual hosts.
            </para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term><cmdsynopsis><command>set_permissions</command> <arg choice="opt">-p <replaceable>vhostpath</replaceable></arg> <arg choice="req"><replaceable>user</replaceable></arg> <arg choice="req"><replaceable>conf</replaceable></arg> <arg choice="req"><replaceable>write</replaceable></arg> <arg choice="req"><replaceable>read</replaceable></arg></cmdsynopsis></term>
          <listitem>
            <variablelist>
              <varlistentry>
                <term>vhostpath</term>
                <listitem><para>The name of the virtual host to which to grant the user access, defaulting to <command>/</command>.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>user</term>
                <listitem><para>The name of the user to grant access to the specified virtual host.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>conf</term>
                <listitem><para>A regular expression matching resource names for which the user is granted configure permissions.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>write</term>
                <listitem><para>A regular expression matching resource names for which the user is granted write permissions.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>read</term>
                <listitem><para>A regular expression matching resource names for which the user is granted read permissions.</para></listitem>
              </varlistentry>
            </variablelist>
            <para>
              Sets user permissions.
            </para>
            <para role="example-prefix">For example:</para>
            <screen role="example">rabbitmqctl set_permissions -p /myvhost tonyg "^tonyg-.*" ".*" ".*"</screen>
            <para role="example">
              This command instructs the RabbitMQ broker to grant the
              user named <command>tonyg</command> access to the virtual host
              called <command>/myvhost</command>, with configure permissions
              on all resources whose names starts with "tonyg-", and
              write and read permissions on all resources.
            </para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term><cmdsynopsis><command>clear_permissions</command> <arg choice="opt">-p <replaceable>vhostpath</replaceable></arg> <arg choice="req"><replaceable>username</replaceable></arg></cmdsynopsis></term>
          <listitem>
            <variablelist>
              <varlistentry>
                <term>vhostpath</term>
                <listitem><para>The name of the virtual host to which to deny the user access, defaulting to <command>/</command>.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>username</term>
                <listitem><para>The name of the user to deny access to the specified virtual host.</para></listitem>
              </varlistentry>
            </variablelist>
            <para>
              Sets user permissions.
            </para>
            <para role="example-prefix">For example:</para>
            <screen role="example">rabbitmqctl clear_permissions -p /myvhost tonyg</screen>
            <para role="example">
              This command instructs the RabbitMQ broker to deny the
              user named <command>tonyg</command> access to the virtual host
              called <command>/myvhost</command>.
            </para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term><cmdsynopsis><command>list_permissions</command> <arg choice="opt">-p <replaceable>vhostpath</replaceable></arg></cmdsynopsis></term>
          <listitem>
            <variablelist>
              <varlistentry>
                <term>vhostpath</term>
                <listitem><para>The name of the virtual host for which to list the users that have been granted access to it, and their permissions. Defaults to <command>/</command>.</para></listitem>
              </varlistentry>
            </variablelist>
            <para>
              Lists permissions in a virtual host.
            </para>
            <para role="example-prefix">For example:</para>
            <screen role="example">rabbitmqctl list_permissions -p /myvhost</screen>
            <para role="example">
              This command instructs the RabbitMQ broker to list all
              the users which have been granted access to the virtual
              host called <command>/myvhost</command>, and the
              permissions they have for operations on resources in
              that virtual host.  Note that an empty string means no
              permissions granted.
            </para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term><cmdsynopsis><command>list_user_permissions</command> <arg choice="req"><replaceable>username</replaceable></arg></cmdsynopsis></term>
          <listitem>
            <variablelist>
              <varlistentry>
                <term>username</term>
                <listitem><para>The name of the user for which to list the permissions.</para></listitem>
              </varlistentry>
            </variablelist>
            <para>
              Lists user permissions.
            </para>
            <para role="example-prefix">For example:</para>
            <screen role="example">rabbitmqctl list_user_permissions tonyg</screen>
            <para role="example">
              This command instructs the RabbitMQ broker to list all the
              virtual hosts to which the user named <command>tonyg</command>
              has been granted access, and the permissions the user has
              for operations on resources in these virtual hosts.
            </para>
          </listitem>
        </varlistentry>
      </variablelist>
    </refsect2>

    <refsect2>
      <title>Parameter Management</title>
      <para>
        Certain features of RabbitMQ (such as the federation plugin)
        are controlled by dynamic,
        cluster-wide <emphasis>parameters</emphasis>. Each parameter
        consists of a component name, a name and a value, and is
        associated with a virtual host. The component name and name are
        strings, and the value is an Erlang term. Parameters can be
        set, cleared and listed. In general you should refer to the
        documentation for the feature in question to see how to set
        parameters.
      </para>
      <variablelist>
        <varlistentry>
          <term><cmdsynopsis><command>set_parameter</command> <arg choice="opt">-p <replaceable>vhostpath</replaceable></arg> <arg choice="req"><replaceable>component_name</replaceable></arg> <arg choice="req"><replaceable>name</replaceable></arg> <arg choice="req"><replaceable>value</replaceable></arg></cmdsynopsis></term>
          <listitem>
            <para>
              Sets a parameter.
            </para>
            <variablelist>
              <varlistentry>
                <term>component_name</term>
                <listitem><para>
                    The name of the component for which the
                    parameter is being set.
                </para></listitem>
              </varlistentry>
              <varlistentry>
                <term>name</term>
                <listitem><para>
                    The name of the parameter being set.
                </para></listitem>
              </varlistentry>
              <varlistentry>
                <term>value</term>
                <listitem><para>
                    The value for the parameter, as a
                    JSON term. In most shells you are very likely to
                    need to quote this.
                </para></listitem>
              </varlistentry>
            </variablelist>
            <para role="example-prefix">For example:</para>
            <screen role="example">rabbitmqctl set_parameter federation local_username '"guest"'</screen>
            <para role="example">
              This command sets the parameter <command>local_username</command> for the <command>federation</command> component in the default virtual host to the JSON term <command>"guest"</command>.
            </para>
          </listitem>
        </varlistentry>
        <varlistentry>
          <term><cmdsynopsis><command>clear_parameter</command> <arg choice="opt">-p <replaceable>vhostpath</replaceable></arg> <arg choice="req"><replaceable>component_name</replaceable></arg> <arg choice="req"><replaceable>key</replaceable></arg></cmdsynopsis></term>
          <listitem>
            <para>
              Clears a parameter.
            </para>
            <variablelist>
              <varlistentry>
                <term>component_name</term>
                <listitem><para>
                    The name of the component for which the
                    parameter is being cleared.
                </para></listitem>
              </varlistentry>
              <varlistentry>
                <term>name</term>
                <listitem><para>
                    The name of the parameter being cleared.
                </para></listitem>
              </varlistentry>
            </variablelist>
            <para role="example-prefix">For example:</para>
            <screen role="example">rabbitmqctl clear_parameter federation local_username</screen>
            <para role="example">
              This command clears the parameter <command>local_username</command> for the <command>federation</command> component in the default virtual host.
            </para>
          </listitem>
        </varlistentry>
        <varlistentry>
          <term><cmdsynopsis><command>list_parameters</command> <arg choice="opt">-p <replaceable>vhostpath</replaceable></arg></cmdsynopsis></term>
          <listitem>
            <para>
              Lists all parameters for a virtual host.
            </para>
            <para role="example-prefix">For example:</para>
            <screen role="example">rabbitmqctl list_parameters</screen>
            <para role="example">
              This command lists all parameters in the default virtual host.
            </para>
          </listitem>
        </varlistentry>
      </variablelist>
    </refsect2>

    <refsect2>
      <title>Policy Management</title>
      <para>
        Policies are used to control and modify the behaviour of queues
        and exchanges on a cluster-wide basis. Policies apply within a
        given vhost, and consist of a name, pattern, definition and an
        optional priority. Policies can be set, cleared and listed.
      </para>
      <variablelist>
        <varlistentry>
          <term><cmdsynopsis><command>set_policy</command> <arg choice="opt">-p <replaceable>vhostpath</replaceable></arg> <arg choice="req"><replaceable>name</replaceable></arg> <arg choice="req"><replaceable>pattern</replaceable></arg>  <arg choice="req"><replaceable>definition</replaceable></arg> <arg choice="opt"><replaceable>priority</replaceable></arg> </cmdsynopsis></term>
          <listitem>
            <para>
              Sets a policy.
            </para>
            <variablelist>
              <varlistentry>
                <term>name</term>
                <listitem><para>
                    The name of the policy.
                </para></listitem>
              </varlistentry>
              <varlistentry>
                <term>pattern</term>
                <listitem><para>
                    The regular expression, which when matches on a given resources causes the policy to apply.
                </para></listitem>
              </varlistentry>
              <varlistentry>
                <term>definition</term>
                <listitem><para>
                    The definition of the policy, as a
                    JSON term. In most shells you are very likely to
                    need to quote this.
                </para></listitem>
              </varlistentry>
              <varlistentry>
                <term>priority</term>
                <listitem><para>
                    The priority of the policy as an integer, defaulting to 0. Higher numbers indicate greater precedence.
                </para></listitem>
              </varlistentry>
            </variablelist>
            <para role="example-prefix">For example:</para>
            <screen role="example">rabbitmqctl set_policy federate-me "^amq." '{"federation-upstream-set":"all"}'</screen>
            <para role="example">
              This command sets the policy <command>federate-me</command> in the default virtual host so that built-in exchanges are federated.
            </para>
          </listitem>
        </varlistentry>
        <varlistentry>
          <term><cmdsynopsis><command>clear_policy</command> <arg choice="opt">-p <replaceable>vhostpath</replaceable></arg> <arg choice="req"><replaceable>name</replaceable></arg></cmdsynopsis></term>
          <listitem>
            <para>
              Clears a policy.
            </para>
            <variablelist>
              <varlistentry>
                <term>name</term>
                <listitem><para>
                    The name of the policy being cleared.
                </para></listitem>
              </varlistentry>
            </variablelist>
            <para role="example-prefix">For example:</para>
            <screen role="example">rabbitmqctl clear_policy federate-me</screen>
            <para role="example">
              This command clears the <command>federate-me</command> policy in the default virtual host.
            </para>
          </listitem>
        </varlistentry>
        <varlistentry>
          <term><cmdsynopsis><command>list_policies</command> <arg choice="opt">-p <replaceable>vhostpath</replaceable></arg></cmdsynopsis></term>
          <listitem>
            <para>
              Lists all policies for a virtual host.
            </para>
            <para role="example-prefix">For example:</para>
            <screen role="example">rabbitmqctl list_policies</screen>
            <para role="example">
              This command lists all policies in the default virtual host.
            </para>
          </listitem>
        </varlistentry>
      </variablelist>
    </refsect2>

    <refsect2>
      <title>Server Status</title>
      <para>
        The server status queries interrogate the server and return a list of
        results with tab-delimited columns. Some queries (<command>list_queues</command>,
        <command>list_exchanges</command>, <command>list_bindings</command>, and
        <command>list_consumers</command>) accept an
        optional <command>vhost</command> parameter. This parameter, if present,  must be
        specified immediately after the query.
      </para>
      <para role="usage">
        The list_queues, list_exchanges and list_bindings commands accept an
        optional virtual host parameter for which to display results. The
        default value is "/".
      </para>

      <variablelist>
        <varlistentry role="usage-has-option-list">
          <term><cmdsynopsis><command>list_queues</command> <arg choice="opt">-p <replaceable>vhostpath</replaceable></arg> <arg choice="opt" role="usage-option-list"><replaceable>queueinfoitem</replaceable> ...</arg></cmdsynopsis></term>
          <listitem>
            <para>
              Returns queue details. Queue details of the <command>/</command> virtual host
              are returned if the "-p" flag is absent. The "-p" flag can be used to
              override this default.
            </para>
            <para>
              The <command>queueinfoitem</command> parameter is used to indicate which queue
              information items to include in the results. The column order in the
              results will match the order of the parameters.
              <command>queueinfoitem</command> can take any value from the list
              that follows:
            </para>
            <variablelist>
              <varlistentry>
                <term>name</term>
                <listitem><para>The name of the queue with non-ASCII characters escaped as in C.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>durable</term>
                <listitem><para>Whether or not the queue survives server restarts.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>auto_delete</term>
                <listitem><para>Whether the queue will be deleted automatically when no longer used.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>arguments</term>
                <listitem><para>Queue arguments.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>policy</term>
                <listitem><para>Policy name applying to the queue.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>pid</term>
                <listitem><para>Id of the Erlang process associated with the queue.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>owner_pid</term>
                <listitem><para>Id of the Erlang process representing the connection
                  which is the exclusive owner of the queue. Empty if the
                  queue is non-exclusive.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>exclusive_consumer_pid</term>
                <listitem><para>Id of the Erlang process representing the channel of the
                  exclusive consumer subscribed to this queue. Empty if
                  there is no exclusive consumer.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>exclusive_consumer_tag</term>
                <listitem><para>Consumer tag of the exclusive consumer subscribed to
                  this queue. Empty if there is no exclusive consumer.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>messages_ready</term>
                <listitem><para>Number of messages ready to be delivered to clients.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>messages_unacknowledged</term>
                <listitem><para>Number of messages delivered to clients but not yet acknowledged.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>messages</term>
                <listitem><para>Sum of ready and unacknowledged messages
                  (queue depth).</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>consumers</term>
                <listitem><para>Number of consumers.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>active_consumers</term>
                <listitem>
                  <para>
                    Number of active consumers. An active consumer is
                    one which could immediately receive any messages
                    sent to the queue - i.e. it is not limited by its
                    prefetch count, TCP congestion, flow control, or
                    because it has issued channel.flow. At least one
                    of messages_ready and active_consumers must always
                    be zero.
                  </para>
                  <para>
                    Note that this value is an instantaneous snapshot
                    - when consumers are restricted by their prefetch
                    count they may only appear to be active for small
                    fractions of a second until more messages are sent
                    out.
                  </para>
                </listitem>
              </varlistentry>
              <varlistentry>
                <term>memory</term>
                <listitem><para>Bytes of memory consumed by the Erlang process associated with the
                  queue, including stack, heap and internal structures.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>slave_pids</term>
                <listitem><para>If the queue is mirrored, this gives the IDs of the current slaves.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>synchronised_slave_pids</term>
                <listitem><para>If the queue is mirrored, this gives the IDs of
                the current slaves which are synchronised with the master -
                i.e. those which could take over from the master without
                message loss.</para></listitem>
              </varlistentry>
            </variablelist>
            <para>
              If no <command>queueinfoitem</command>s are specified then queue name and depth are
              displayed.
            </para>
            <para role="example-prefix">
              For example:
            </para>
            <screen role="example">rabbitmqctl list_queues -p /myvhost messages consumers</screen>
            <para role="example">
              This command displays the depth and number of consumers for each
              queue of the virtual host named <command>/myvhost</command>.
            </para>
          </listitem>
        </varlistentry>

        <varlistentry role="usage-has-option-list">
          <term><cmdsynopsis><command>list_exchanges</command> <arg choice="opt">-p <replaceable>vhostpath</replaceable></arg> <arg choice="opt" role="usage-option-list"><replaceable>exchangeinfoitem</replaceable> ...</arg></cmdsynopsis></term>
          <listitem>
            <para>
              Returns exchange details. Exchange details of the <command>/</command> virtual host
              are returned if the "-p" flag is absent. The "-p" flag can be used to
              override this default.
            </para>
            <para>
              The <command>exchangeinfoitem</command> parameter is used to indicate which
              exchange information items to include in the results. The column order in the
              results will match the order of the parameters.
              <command>exchangeinfoitem</command> can take any value from the list
              that follows:
            </para>
            <variablelist>
              <varlistentry>
                <term>name</term>
                <listitem><para>The name of the exchange with non-ASCII characters escaped as in C.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>type</term>
                <listitem><para>The exchange type (such as
                [<command>direct</command>,
                  <command>topic</command>, <command>headers</command>,
                  <command>fanout</command>]).</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>durable</term>
                <listitem><para>Whether or not the exchange survives server restarts.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>auto_delete</term>
                <listitem><para>Whether the exchange will be deleted automatically when no longer used.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>internal</term>
                <listitem><para>Whether the exchange is internal, i.e. cannot be directly published to by a client.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>arguments</term>
                <listitem><para>Exchange arguments.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>policy</term>
                <listitem><para>Policy name for applying to the exchange.</para></listitem>
              </varlistentry>
            </variablelist>
            <para>
              If no <command>exchangeinfoitem</command>s are specified then
              exchange name and type are displayed.
            </para>
            <para role="example-prefix">
              For example:
            </para>
            <screen role="example">rabbitmqctl list_exchanges -p /myvhost name type</screen>
            <para role="example">
              This command displays the name and type for each
              exchange of the virtual host named <command>/myvhost</command>.
            </para>
          </listitem>
        </varlistentry>

        <varlistentry role="usage-has-option-list">
          <term><cmdsynopsis><command>list_bindings</command> <arg choice="opt">-p <replaceable>vhostpath</replaceable></arg> <arg choice="opt" role="usage-option-list"><replaceable>bindinginfoitem</replaceable> ...</arg></cmdsynopsis></term>
          <listitem>
            <para>
              Returns binding details. By default the bindings for
              the <command>/</command> virtual host are returned. The
              "-p" flag can be used to override this default.
            </para>
            <para>
              The <command>bindinginfoitem</command> parameter is used
              to indicate which binding information items to include
              in the results. The column order in the results will
              match the order of the parameters.
              <command>bindinginfoitem</command> can take any value
              from the list that follows:
            </para>
            <variablelist>
              <varlistentry>
                <term>source_name</term>
                <listitem><para>The name of the source of messages to
                which the binding is attached. With non-ASCII
                characters escaped as in C.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>source_kind</term>
                <listitem><para>The kind of the source of messages to
                which the binding is attached. Currently always
                exchange. With non-ASCII characters escaped as in
                C.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>destination_name</term>
                <listitem><para>The name of the destination of
                messages to which the binding is attached. With
                non-ASCII characters escaped as in
                C.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>destination_kind</term>
                <listitem><para>The kind of the destination of
                messages to which the binding is attached. With
                non-ASCII characters escaped as in
                C.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>routing_key</term>
                <listitem><para>The binding's routing key, with
                non-ASCII characters escaped as in C.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>arguments</term>
                <listitem><para>The binding's arguments.</para></listitem>
              </varlistentry>
            </variablelist>
            <para>
              If no <command>bindinginfoitem</command>s are specified then
              all above items are displayed.
            </para>
            <para role="example-prefix">
              For example:
            </para>
            <screen role="example">rabbitmqctl list_bindings -p /myvhost exchange_name queue_name</screen>
            <para role="example">
              This command displays the exchange name and queue name
              of the bindings in the virtual host
              named <command>/myvhost</command>.
            </para>
          </listitem>
        </varlistentry>

        <varlistentry id="list_connections" role="usage-has-option-list">
          <term><cmdsynopsis><command>list_connections</command> <arg choice="opt" role="usage-option-list"><replaceable>connectioninfoitem</replaceable> ...</arg></cmdsynopsis></term>
          <listitem>
            <para>
              Returns TCP/IP connection statistics.
            </para>
            <para>
              The <command>connectioninfoitem</command> parameter is used to indicate
              which connection information items to include in the results. The
              column order in the results will match the order of the parameters.
              <command>connectioninfoitem</command> can take any value from the list
              that follows:
            </para>

            <variablelist>
              <varlistentry>
                <term>pid</term>
                <listitem><para>Id of the Erlang process associated with the connection.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>name</term>
                <listitem><para>Readable name for the connection.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>address</term>
                <listitem><para>Server IP address.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>port</term>
                <listitem><para>Server port.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>peer_address</term>
                <listitem><para>Peer address.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>peer_port</term>
                <listitem><para>Peer port.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>ssl</term>
                <listitem><para>Boolean indicating whether the
                connection is secured with SSL.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>ssl_protocol</term>
                <listitem><para>SSL protocol
                (e.g. tlsv1)</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>ssl_key_exchange</term>
                <listitem><para>SSL key exchange algorithm
                (e.g. rsa)</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>ssl_cipher</term>
                <listitem><para>SSL cipher algorithm
                (e.g. aes_256_cbc)</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>ssl_hash</term>
                <listitem><para>SSL hash function
                (e.g. sha)</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>peer_cert_subject</term>
                <listitem><para>The subject of the peer's SSL
                certificate, in RFC4514 form.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>peer_cert_issuer</term>
                <listitem><para>The issuer of the peer's SSL
                certificate, in RFC4514 form.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>peer_cert_validity</term>
                <listitem><para>The period for which the peer's SSL
                certificate is valid.</para></listitem>
              </varlistentry>

              <varlistentry>
                <term>last_blocked_by</term>
                <listitem><para>The reason for which this connection
                    was last blocked. One of 'resource' - due to a memory
                    or disk alarm, 'flow' - due to internal flow control, or
                    'none' if the connection was never
                    blocked.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>last_blocked_age</term>
                <listitem><para>Time, in seconds, since this
                    connection was last blocked, or
                    'infinity'.</para></listitem>
              </varlistentry>

              <varlistentry>
                <term>state</term>
                <listitem><para>Connection state (one of [<command>starting</command>, <command>tuning</command>,
                  <command>opening</command>, <command>running</command>, <command>blocking</command>, <command>blocked</command>, <command>closing</command>, <command>closed</command>]).</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>channels</term>
                <listitem><para>Number of channels using the connection.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>protocol</term>
                <listitem><para>Version of the AMQP protocol in use (currently one of <command>{0,9,1}</command> or <command>{0,8,0}</command>). Note that if a client requests an AMQP 0-9 connection, we treat it as AMQP 0-9-1.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>auth_mechanism</term>
                <listitem><para>SASL authentication mechanism used, such as <command>PLAIN</command>.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>user</term>
                <listitem><para>Username associated with the connection.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>vhost</term>
                <listitem><para>Virtual host name with non-ASCII characters escaped as in C.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>timeout</term>
                <listitem><para>Connection timeout / negotiated heartbeat interval, in seconds.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>frame_max</term>
                <listitem><para>Maximum frame size (bytes).</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>client_properties</term>
                <listitem><para>Informational properties transmitted by the client
                  during connection establishment.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>recv_oct</term>
                <listitem><para>Octets received.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>recv_cnt</term>
                <listitem><para>Packets received.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>send_oct</term>
                <listitem><para>Octets send.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>send_cnt</term>
                <listitem><para>Packets sent.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>send_pend</term>
                <listitem><para>Send queue size.</para></listitem>
              </varlistentry>
            </variablelist>
            <para>
              If no <command>connectioninfoitem</command>s are
              specified then user, peer address, peer port, time since
              flow control and memory block state are displayed.
            </para>

            <para role="example-prefix">
              For example:
            </para>
            <screen role="example">rabbitmqctl list_connections send_pend port</screen>
            <para role="example">
              This command displays the send queue size and server port for each
              connection.
            </para>
          </listitem>
        </varlistentry>

        <varlistentry role="usage-has-option-list">
          <term><cmdsynopsis><command>list_channels</command> <arg choice="opt" role="usage-option-list"><replaceable>channelinfoitem</replaceable> ...</arg></cmdsynopsis></term>
          <listitem>
            <para>
              Returns information on all current channels, the logical
              containers executing most AMQP commands. This includes
              channels that are part of ordinary AMQP connections, and
              channels created by various plug-ins and other extensions.
            </para>
            <para>
              The <command>channelinfoitem</command> parameter is used to
              indicate which channel information items to include in the
              results. The column order in the results will match the
              order of the parameters.
              <command>channelinfoitem</command> can take any value from the list
              that follows:
            </para>

            <variablelist>
              <varlistentry>
                <term>pid</term>
                <listitem><para>Id of the Erlang process associated with the connection.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>connection</term>
                <listitem><para>Id of the Erlang process associated with the connection
                  to which the channel belongs.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>name</term>
                <listitem><para>Readable name for the channel.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>number</term>
                <listitem><para>The number of the channel, which uniquely identifies it within
                  a connection.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>user</term>
                <listitem><para>Username associated with the channel.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>vhost</term>
                <listitem><para>Virtual host in which the channel operates.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>transactional</term>
                <listitem><para>True if the channel is in transactional mode, false otherwise.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>confirm</term>
                <listitem><para>True if the channel is in confirm mode, false otherwise.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>consumer_count</term>
                <listitem><para>Number of logical AMQP consumers retrieving messages via
                  the channel.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>messages_unacknowledged</term>
                <listitem><para>Number of messages delivered via this channel but not
                  yet acknowledged.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>messages_uncommitted</term>
                <listitem><para>Number of messages received in an as yet
                  uncommitted transaction.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>acks_uncommitted</term>
                <listitem><para>Number of acknowledgements received in an as yet
                  uncommitted transaction.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>messages_unconfirmed</term>
                <listitem><para>Number of published messages not yet
                confirmed.  On channels not in confirm mode, this
                remains 0.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>prefetch_count</term>
                <listitem><para>QoS prefetch count limit in force, 0 if unlimited.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>client_flow_blocked</term>
                <listitem><para>True if the client issued a
                    <command>channel.flow{active=false}</command>
                    command, blocking the server from delivering
                    messages to the channel's consumers.
                    </para></listitem>
              </varlistentry>
            </variablelist>
            <para>
              If no <command>channelinfoitem</command>s are specified then pid,
              user, consumer_count, and messages_unacknowledged are assumed.
            </para>

            <para role="example-prefix">
              For example:
            </para>
            <screen role="example">rabbitmqctl list_channels connection messages_unacknowledged</screen>
            <para role="example">
              This command displays the connection process and count
              of unacknowledged messages for each channel.
            </para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term><cmdsynopsis><command>list_consumers</command> <arg choice="opt">-p <replaceable>vhostpath</replaceable></arg></cmdsynopsis></term>
          <listitem>
            <para>
              List consumers, i.e. subscriptions to a queue's message
              stream. Each line printed shows, separated by tab
              characters, the name of the queue subscribed to, the id of
              the channel process via which the subscription was created
              and is managed, the consumer tag which uniquely identifies
              the subscription within a channel, and a boolean
              indicating whether acknowledgements are expected for
              messages delivered to this consumer.
            </para>
            <para>
              The output is a list of rows containing, in order, the queue name,
              channel process id, consumer tag, and a boolean indicating whether
              acknowledgements are expected from the consumer.
            </para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term><cmdsynopsis><command>status</command></cmdsynopsis></term>
          <listitem>
            <para>
              Displays broker status information such as the running
              applications on the current Erlang node, RabbitMQ and
              Erlang versions, OS name, memory and file descriptor
              statistics. (See the <command>cluster_status</command>
              command to find out which nodes are clustered and
              running.)
            </para>
            <para role="example-prefix">For example:</para>
            <screen role="example">rabbitmqctl status</screen>
            <para role="example">
              This command displays information about the RabbitMQ
              broker.
            </para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term><cmdsynopsis><command>environment</command></cmdsynopsis></term>
          <listitem>
            <para>
              Display the name and value of each variable in the
              application environment.
            </para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term><cmdsynopsis><command>report</command></cmdsynopsis></term>
          <listitem>
            <para>
              Generate a server status report containing a
              concatenation of all server status information for
              support purposes. The output should be redirected to a
              file when accompanying a support request.
            </para>
            <para role="example-prefix">
              For example:
            </para>
            <screen role="example">rabbitmqctl report > server_report.txt</screen>
            <para role="example">
              This command creates a server report which may be
              attached to a support request email.
            </para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term><cmdsynopsis><command>eval</command> <arg choice="req"><replaceable>expr</replaceable></arg></cmdsynopsis></term>
          <listitem>
            <para>
              Evaluate an arbitrary Erlang expression.
            </para>
            <para role="example-prefix">
              For example:
            </para>
            <screen role="example">rabbitmqctl eval 'node().'</screen>
            <para role="example">
              This command returns the name of the node to which rabbitmqctl has connected.
            </para>
          </listitem>
        </varlistentry>
      </variablelist>
    </refsect2>

    <refsect2>
      <title>Miscellaneous</title>
      <variablelist>
        <varlistentry>
          <term><cmdsynopsis><command>close_connection</command> <arg choice="req"><replaceable>connectionpid</replaceable></arg> <arg choice="req"><replaceable>explanation</replaceable></arg></cmdsynopsis></term>
          <listitem>
            <variablelist>
              <varlistentry>
                <term>connectionpid</term>
                <listitem><para>Id of the Erlang process associated with the connection to close.</para></listitem>
              </varlistentry>
              <varlistentry>
                <term>explanation</term>
                <listitem><para>Explanation string.</para></listitem>
              </varlistentry>
            </variablelist>
            <para>
              Instruct the broker to close the connection associated
              with the Erlang process id <option>connectionpid</option> (see also the
              <link linkend="list_connections"><command>list_connections</command></link>
              command), passing the <option>explanation</option> string to the
              connected client as part of the AMQP connection shutdown
              protocol.
            </para>
            <para role="example-prefix">For example:</para>
            <screen role="example">rabbitmqctl close_connection "&lt;rabbit@tanto.4262.0&gt;" "go away"</screen>
            <para role="example">
              This command instructs the RabbitMQ broker to close the
              connection associated with the Erlang process
              id <command>&lt;rabbit@tanto.4262.0&gt;</command>, passing the
              explanation <command>go away</command> to the connected client.
            </para>
          </listitem>
        </varlistentry>
        <varlistentry>
          <term><cmdsynopsis><command>trace_on</command> <arg choice="opt">-p <replaceable>vhost</replaceable></arg></cmdsynopsis></term>
          <listitem>
            <variablelist>
              <varlistentry>
                <term>vhost</term>
                <listitem><para>The name of the virtual host for which to start tracing.</para></listitem>
              </varlistentry>
            </variablelist>
            <para>
              Starts tracing.
            </para>
          </listitem>
        </varlistentry>

        <varlistentry>
          <term><cmdsynopsis><command>trace_off</command> <arg choice="opt">-p <replaceable>vhost</replaceable></arg></cmdsynopsis></term>
          <listitem>
            <variablelist>
              <varlistentry>
                <term>vhost</term>
                <listitem><para>The name of the virtual host for which to stop tracing.</para></listitem>
              </varlistentry>
            </variablelist>
            <para>
              Stops tracing.
            </para>
          </listitem>
        </varlistentry>
        <varlistentry>
          <term><cmdsynopsis><command>set_vm_memory_high_watermark</command> <arg choice="req"><replaceable>fraction</replaceable></arg></cmdsynopsis></term>
          <listitem>
            <variablelist>
              <varlistentry>
                <term>fraction</term>
                <listitem><para>
                    The new memory threshold fraction at which flow
                    control is triggered, as a floating point number
                    greater than or equal to 0.
                </para></listitem>
              </varlistentry>
            </variablelist>
          </listitem>
        </varlistentry>
      </variablelist>
    </refsect2>
  </refsect1>

</refentry>