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| author | Sam Thursfield <sam.thursfield@codethink.co.uk> | 2015-01-26 16:59:04 +0000 |
|---|---|---|
| committer | Sam Thursfield <sam.thursfield@codethink.co.uk> | 2015-01-26 17:07:04 +0000 |
| commit | cd80d2bf3a7936cc718b27e17729b207b762c8c5 (patch) | |
| tree | 1c21ad273ea0c8cb4f84ff5be5401dad47456c05 /README.mdwn | |
| parent | 32086cc5f298f8914e395f9eb54b2baf4f5f6f4f (diff) | |
| download | infrastructure-cd80d2bf3a7936cc718b27e17729b207b762c8c5.tar.gz | |
database: Get ready for production!
To enable backups, the contents of /var/lib/mysql are now stored in a
logical volume managed by LVM. We can take a snapshot of this volume in
a matter of seconds, meaning we can take a clean, local snapshot of the
state of the database with only small amount of downtime. The snapshot
can then be mounted and its contents copied out of the system while the
MariaDB service is running again.
Diffstat (limited to 'README.mdwn')
| -rw-r--r-- | README.mdwn | 54 |
1 files changed, 30 insertions, 24 deletions
diff --git a/README.mdwn b/README.mdwn index 46a5fe64..d7a40702 100644 --- a/README.mdwn +++ b/README.mdwn @@ -77,34 +77,21 @@ To deploy a development instance: To deploy this system to production: packer build -only=production database/packer_template.json - nova boot \ - --flavor dc1.1x1 --image 'database-mariadb' \ - --key-name=<your-keypair> database-mariadb \ - --nic='net-id=d079fa3e-2558-4bcb-ad5a-279040c202b5,v4-fixed-ip=192.168.222.30' + nova boot database-mariadb \ + --key-name=<your keypair> \ + --flavor dc1.1x1 \ + --image 'database-mariadb' \ + --nic='net-id=d079fa3e-2558-4bcb-ad5a-279040c202b5,v4-fixed-ip=192.168.222.30' \ + --user-data ./baserock-ops-team.cloud-config nova volume-create \ --display-name database-volume \ --display-description 'Database volume' \ - 10 - nova volume-attach database-mariadb <volume ID> auto - - nova floating-ip-associate database-mariadb <some floating IP> - - # Set up the volume inside the machine - echo <IP> > dbhost - ansible \* -i dbhost --user=fedora --sudo -m shell \ - -a "mkfs.ext4 /dev/vdb -L database-volume" - ansible \* -i dbhost --user=fedora --sudo -m lineinfile \ - -a "dest=/etc/fstab create=yes line='LABEL=database-volume /var/lib/mysql ext4 defaults 1 2'" - ansible \* -i dbhost --user=fedora --sudo -m shell \ - -a "mount -a" + --volume-type Ceph \ + 100 + nova volume-attach database-mariadb <volume ID> /dev/vdb - # FIXME: here we start the service before setting the root password!!!! - ansible \* -i dbhost --user=fedora --sudo -m service \ - -a "name=mariadb enabled=true state=started" - - ansible-playbook -i dbhost --user=fedora database/user_config.yml - - nova floating-ip-disassociate database-mariadb <some floating IP> + ansible-playbook -i hosts database/instance-config.yml + ansible-playbook -i hosts database/instance-mariadb-config.yml OpenID provider @@ -199,3 +186,22 @@ To run an ad-hoc command (upgrading, for example): ansible-playbook -i hosts fedora -m command -a 'sudo yum update -y' ansible-playbook -i hosts ubuntu -m command -a 'sudo apt-get update -y' + +Backups +------- + +The database server doesn't yet have automated backups running. You can +manually take a backup like this: + + sudo systemctl stop mariadb.service + sudo lvcreate \ + --name database-backup-20150126 \ + --snapshot /dev/vg0/database \ + --extents 100%ORIGIN \ + --permission=r + sudo systemctl start mariadb.service + sudo mount /dev/vg0/database-backup-20150126 /mnt + # use your preferred backup tool (`rsync` is recommended) to extract the + # contents of /mnt somewhere safe. + sudo umount /dev/vg0/database-backup-20150126 + sudo lvremove /dev/vg0/database-backup-20150126 |