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#!/usr/bin/python
# -*- coding: utf-8 -*-
# (c) 2013, James Martin <jmartin@basho.com>, Drew Kerrigan <dkerrigan@basho.com>
# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
from __future__ import absolute_import, division, print_function
__metaclass__ = type
ANSIBLE_METADATA = {'metadata_version': '1.1',
'status': ['preview'],
'supported_by': 'community'}
DOCUMENTATION = '''
---
module: riak
short_description: This module handles some common Riak operations
description:
- This module can be used to join nodes to a cluster, check
the status of the cluster.
version_added: "1.2"
author:
- "James Martin (@jsmartin)"
- "Drew Kerrigan (@drewkerrigan)"
options:
command:
description:
- The command you would like to perform against the cluster.
choices: ['ping', 'kv_test', 'join', 'plan', 'commit']
config_dir:
description:
- The path to the riak configuration directory
default: /etc/riak
http_conn:
description:
- The ip address and port that is listening for Riak HTTP queries
default: 127.0.0.1:8098
target_node:
description:
- The target node for certain operations (join, ping)
default: riak@127.0.0.1
wait_for_handoffs:
description:
- Number of seconds to wait for handoffs to complete.
wait_for_ring:
description:
- Number of seconds to wait for all nodes to agree on the ring.
wait_for_service:
description:
- Waits for a riak service to come online before continuing.
choices: ['kv']
validate_certs:
description:
- If C(no), SSL certificates will not be validated. This should only be used
on personally controlled sites using self-signed certificates.
type: bool
default: 'yes'
version_added: 1.5.1
'''
EXAMPLES = '''
# Join's a Riak node to another node
- riak:
command: join
target_node: riak@10.1.1.1
# Wait for handoffs to finish. Use with async and poll.
- riak:
wait_for_handoffs: yes
# Wait for riak_kv service to startup
- riak:
wait_for_service: kv
'''
import json
import time
from ansible.module_utils.basic import AnsibleModule
from ansible.module_utils.urls import fetch_url
def ring_check(module, riak_admin_bin):
cmd = '%s ringready' % riak_admin_bin
rc, out, err = module.run_command(cmd)
if rc == 0 and 'TRUE All nodes agree on the ring' in out:
return True
else:
return False
def main():
module = AnsibleModule(
argument_spec=dict(
command=dict(required=False, default=None, choices=[
'ping', 'kv_test', 'join', 'plan', 'commit']),
config_dir=dict(default='/etc/riak', type='path'),
http_conn=dict(required=False, default='127.0.0.1:8098'),
target_node=dict(default='riak@127.0.0.1', required=False),
wait_for_handoffs=dict(default=False, type='int'),
wait_for_ring=dict(default=False, type='int'),
wait_for_service=dict(
required=False, default=None, choices=['kv']),
validate_certs=dict(default='yes', type='bool'))
)
command = module.params.get('command')
http_conn = module.params.get('http_conn')
target_node = module.params.get('target_node')
wait_for_handoffs = module.params.get('wait_for_handoffs')
wait_for_ring = module.params.get('wait_for_ring')
wait_for_service = module.params.get('wait_for_service')
# make sure riak commands are on the path
riak_bin = module.get_bin_path('riak')
riak_admin_bin = module.get_bin_path('riak-admin')
timeout = time.time() + 120
while True:
if time.time() > timeout:
module.fail_json(msg='Timeout, could not fetch Riak stats.')
(response, info) = fetch_url(module, 'http://%s/stats' % (http_conn), force=True, timeout=5)
if info['status'] == 200:
stats_raw = response.read()
break
time.sleep(5)
# here we attempt to load those stats,
try:
stats = json.loads(stats_raw)
except Exception:
module.fail_json(msg='Could not parse Riak stats.')
node_name = stats['nodename']
nodes = stats['ring_members']
ring_size = stats['ring_creation_size']
rc, out, err = module.run_command([riak_bin, 'version'])
version = out.strip()
result = dict(node_name=node_name,
nodes=nodes,
ring_size=ring_size,
version=version)
if command == 'ping':
cmd = '%s ping %s' % (riak_bin, target_node)
rc, out, err = module.run_command(cmd)
if rc == 0:
result['ping'] = out
else:
module.fail_json(msg=out)
elif command == 'kv_test':
cmd = '%s test' % riak_admin_bin
rc, out, err = module.run_command(cmd)
if rc == 0:
result['kv_test'] = out
else:
module.fail_json(msg=out)
elif command == 'join':
if nodes.count(node_name) == 1 and len(nodes) > 1:
result['join'] = 'Node is already in cluster or staged to be in cluster.'
else:
cmd = '%s cluster join %s' % (riak_admin_bin, target_node)
rc, out, err = module.run_command(cmd)
if rc == 0:
result['join'] = out
result['changed'] = True
else:
module.fail_json(msg=out)
elif command == 'plan':
cmd = '%s cluster plan' % riak_admin_bin
rc, out, err = module.run_command(cmd)
if rc == 0:
result['plan'] = out
if 'Staged Changes' in out:
result['changed'] = True
else:
module.fail_json(msg=out)
elif command == 'commit':
cmd = '%s cluster commit' % riak_admin_bin
rc, out, err = module.run_command(cmd)
if rc == 0:
result['commit'] = out
result['changed'] = True
else:
module.fail_json(msg=out)
# this could take a while, recommend to run in async mode
if wait_for_handoffs:
timeout = time.time() + wait_for_handoffs
while True:
cmd = '%s transfers' % riak_admin_bin
rc, out, err = module.run_command(cmd)
if 'No transfers active' in out:
result['handoffs'] = 'No transfers active.'
break
time.sleep(10)
if time.time() > timeout:
module.fail_json(msg='Timeout waiting for handoffs.')
if wait_for_service:
cmd = [riak_admin_bin, 'wait_for_service', 'riak_%s' % wait_for_service, node_name]
rc, out, err = module.run_command(cmd)
result['service'] = out
if wait_for_ring:
timeout = time.time() + wait_for_ring
while True:
if ring_check(module, riak_admin_bin):
break
time.sleep(10)
if time.time() > timeout:
module.fail_json(msg='Timeout waiting for nodes to agree on ring.')
result['ring_ready'] = ring_check(module, riak_admin_bin)
module.exit_json(**result)
if __name__ == '__main__':
main()
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