379 lines
14 KiB
Python
379 lines
14 KiB
Python
#!/usr/bin/python
|
|
|
|
# (c) 2015, Sergei Antipov, 2GIS LLC
|
|
#
|
|
# This file is part of Ansible
|
|
#
|
|
# Ansible is free software: you can redistribute it and/or modify
|
|
# it under the terms of the GNU General Public License as published by
|
|
# the Free Software Foundation, either version 3 of the License, or
|
|
# (at your option) any later version.
|
|
#
|
|
# Ansible is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
# GNU General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU General Public License
|
|
# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
DOCUMENTATION = '''
|
|
---
|
|
module: mongodb_replication
|
|
short_description: Adds or removes a node from a MongoDB Replica Set.
|
|
description:
|
|
- Adds or removes host from a MongoDB replica set. Initialize replica set if it needed.
|
|
options:
|
|
login_user:
|
|
description:
|
|
- The username used to authenticate with
|
|
required: false
|
|
default: null
|
|
login_password:
|
|
description:
|
|
- The password used to authenticate with
|
|
required: false
|
|
default: null
|
|
login_host:
|
|
description:
|
|
- The host running the database
|
|
required: false
|
|
default: localhost
|
|
login_port:
|
|
description:
|
|
- The port to connect to
|
|
required: false
|
|
default: 27017
|
|
replica_set:
|
|
description:
|
|
- Replica set to connect to (automatically connects to primary for writes)
|
|
required: false
|
|
default: null
|
|
host_name:
|
|
description:
|
|
- The name of the host to add/remove from replica set
|
|
required: true
|
|
host_port:
|
|
description:
|
|
- The port of the host
|
|
required: true
|
|
default: null
|
|
host_type:
|
|
description:
|
|
- The type of the host in replica set
|
|
required: false
|
|
default: replica
|
|
choices: [ "replica", "arbiter" ]
|
|
ssl:
|
|
description:
|
|
- Whether to use an SSL connection when connecting to the database
|
|
default: False
|
|
build_indexes:
|
|
description:
|
|
- Determines whether the mongod builds indexes on this member.
|
|
required: false
|
|
default: true
|
|
hidden:
|
|
description:
|
|
- When this value is true, the replica set hides this instance,
|
|
and does not include the member in the output of db.isMaster()
|
|
or isMaster
|
|
required: false
|
|
default: false
|
|
priority:
|
|
description:
|
|
- A number that indicates the relative eligibility of a member
|
|
to become a primary
|
|
required: false
|
|
default: 1.0
|
|
slave_delay:
|
|
description:
|
|
- The number of seconds behind the primary that this replica set
|
|
member should lag
|
|
required: false
|
|
default: 0
|
|
votes:
|
|
description:
|
|
- The number of votes a server will cast in a replica set election
|
|
default: 1
|
|
state:
|
|
state:
|
|
description:
|
|
- The replica set member state
|
|
required: false
|
|
default: present
|
|
choices: [ "present", "absent" ]
|
|
notes:
|
|
- Requires the pymongo Python package on the remote host, version 2.4.2+. This
|
|
can be installed using pip or the OS package manager. @see http://api.mongodb.org/python/current/installation.html
|
|
requirements: [ "pymongo" ]
|
|
author: Sergei Antipov
|
|
'''
|
|
|
|
EXAMPLES = '''
|
|
# Add 'mongo1.dev:27017' host into replica set as replica (Replica will be initiated if it not exists)
|
|
- mongodb_replication: replica_set=replSet host_name=mongo1.dev host_port=27017 state=present
|
|
|
|
# Add 'mongo2.dev:30000' host into replica set as arbiter
|
|
- mongodb_replication: replica_set=replSet host_name=mongo2.dev host_port=30000 host_type=arbiter state=present
|
|
|
|
# Add 'mongo3.dev:27017' host into replica set as replica and authorization params
|
|
- mongodb_replication: replica_set=replSet login_host=mongo1.dev login_user=siteRootAdmin login_password=123456 host_name=mongo3.dev host_port=27017 state=present
|
|
|
|
# Add 'mongo4.dev:27017' host into replica set as replica via SSL
|
|
- mongodb_replication: replica_set=replSet host_name=mongo4.dev host_port=27017 ssl=True state=present
|
|
|
|
# Remove 'mongo4.dev:27017' host from the replica set
|
|
- mongodb_replication: replica_set=replSet host_name=mongo4.dev host_port=27017 state=absent
|
|
'''
|
|
|
|
import ConfigParser
|
|
import time
|
|
from distutils.version import LooseVersion
|
|
try:
|
|
from pymongo.errors import ConnectionFailure
|
|
from pymongo.errors import OperationFailure
|
|
from pymongo.errors import ConfigurationError
|
|
from pymongo.errors import AutoReconnect
|
|
from pymongo import version as PyMongoVersion
|
|
from pymongo import MongoClient
|
|
from pymongo import MongoReplicaSetClient
|
|
except ImportError:
|
|
pymongo_found = False
|
|
else:
|
|
pymongo_found = True
|
|
|
|
# =========================================
|
|
# MongoDB module specific support methods.
|
|
#
|
|
|
|
def check_members(state, module, client, host_name, host_port, host_type):
|
|
admin_db = client['admin']
|
|
local_db = client['local']
|
|
|
|
if local_db.system.replset.count() > 1:
|
|
module.fail_json(msg='local.system.replset has unexpected contents')
|
|
|
|
cfg = local_db.system.replset.find_one()
|
|
if not cfg:
|
|
module.fail_json(msg='no config object retrievable from local.system.replset')
|
|
|
|
for member in cfg['members']:
|
|
if state == 'present':
|
|
if host_type == 'replica':
|
|
if "{0}:{1}".format(host_name, host_port) in member['host']:
|
|
module.exit_json(changed=False, host_name=host_name, host_port=host_port, host_type=host_type)
|
|
else:
|
|
if "{0}:{1}".format(host_name, host_port) in member['host'] and member['arbiterOnly']:
|
|
module.exit_json(changed=False, host_name=host_name, host_port=host_port, host_type=host_type)
|
|
else:
|
|
if host_type == 'replica':
|
|
if "{0}:{1}".format(host_name, host_port) not in member['host']:
|
|
module.exit_json(changed=False, host_name=host_name, host_port=host_port, host_type=host_type)
|
|
else:
|
|
if "{0}:{1}".format(host_name, host_port) not in member['host'] and member['arbiterOnly']:
|
|
module.exit_json(changed=False, host_name=host_name, host_port=host_port, host_type=host_type)
|
|
|
|
def add_host(module, client, host_name, host_port, host_type, timeout=180, **kwargs):
|
|
while True:
|
|
try:
|
|
admin_db = client['admin']
|
|
local_db = client['local']
|
|
|
|
if local_db.system.replset.count() > 1:
|
|
module.fail_json(msg='local.system.replset has unexpected contents')
|
|
|
|
cfg = local_db.system.replset.find_one()
|
|
if not cfg:
|
|
module.fail_json(msg='no config object retrievable from local.system.replset')
|
|
|
|
cfg['version'] += 1
|
|
max_id = max(cfg['members'], key=lambda x:x['_id'])
|
|
new_host = { '_id': max_id['_id'] + 1, 'host': "{0}:{1}".format(host_name, host_port) }
|
|
if host_type == 'arbiter':
|
|
new_host['arbiterOnly'] = True
|
|
|
|
if not kwargs['build_indexes']:
|
|
new_host['buildIndexes'] = False
|
|
|
|
if kwargs['hidden']:
|
|
new_host['hidden'] = True
|
|
|
|
if kwargs['priority'] != 1.0:
|
|
new_host['priority'] = kwargs['priority']
|
|
|
|
if kwargs['slave_delay'] != 0:
|
|
new_host['slaveDelay'] = kwargs['slave_delay']
|
|
|
|
if kwargs['votes'] != 1:
|
|
new_host['votes'] = kwargs['votes']
|
|
|
|
cfg['members'].append(new_host)
|
|
admin_db.command('replSetReconfig', cfg)
|
|
return
|
|
except (OperationFailure, AutoReconnect) as e:
|
|
timeout = timeout - 5
|
|
if timeout <= 0:
|
|
module.fail_json(msg='reached timeout while waiting for rs.reconfig(): %s' % str(e))
|
|
time.sleep(5)
|
|
|
|
def remove_host(module, client, host_name, timeout=180):
|
|
while True:
|
|
try:
|
|
admin_db = client['admin']
|
|
local_db = client['local']
|
|
|
|
if local_db.system.replset.count() > 1:
|
|
module.fail_json(msg='local.system.replset has unexpected contents')
|
|
|
|
cfg = local_db.system.replset.find_one()
|
|
if not cfg:
|
|
module.fail_json(msg='no config object retrievable from local.system.replset')
|
|
|
|
cfg['version'] += 1
|
|
|
|
if len(cfg['members']) == 1:
|
|
module.fail_json(msg="You can't delete last member of replica set")
|
|
for member in cfg['members']:
|
|
if host_name in member['host']:
|
|
cfg['members'].remove(member)
|
|
else:
|
|
fail_msg = "couldn't find member with hostname: {0} in replica set members list".format(host_name)
|
|
module.fail_json(msg=fail_msg)
|
|
except (OperationFailure, AutoReconnect) as e:
|
|
timeout = timeout - 5
|
|
if timeout <= 0:
|
|
module.fail_json(msg='reached timeout while waiting for rs.reconfig(): %s' % str(e))
|
|
time.sleep(5)
|
|
|
|
def load_mongocnf():
|
|
config = ConfigParser.RawConfigParser()
|
|
mongocnf = os.path.expanduser('~/.mongodb.cnf')
|
|
|
|
try:
|
|
config.readfp(open(mongocnf))
|
|
creds = dict(
|
|
user=config.get('client', 'user'),
|
|
password=config.get('client', 'pass')
|
|
)
|
|
except (ConfigParser.NoOptionError, IOError):
|
|
return False
|
|
|
|
return creds
|
|
|
|
def wait_for_ok_and_master(module, client, timeout = 60):
|
|
while True:
|
|
status = client.admin.command('replSetGetStatus', check=False)
|
|
if status['ok'] == 1 and status['myState'] == 1:
|
|
return
|
|
|
|
timeout = timeout - 1
|
|
if timeout == 0:
|
|
module.fail_json(msg='reached timeout while waiting for rs.status() to become ok=1')
|
|
|
|
time.sleep(1)
|
|
|
|
def authenticate(client, login_user, login_password):
|
|
if login_user is None and login_password is None:
|
|
mongocnf_creds = load_mongocnf()
|
|
if mongocnf_creds is not False:
|
|
login_user = mongocnf_creds['user']
|
|
login_password = mongocnf_creds['password']
|
|
elif login_password is None and login_user is not None:
|
|
module.fail_json(msg='when supplying login arguments, both login_user and login_password must be provided')
|
|
|
|
if login_user is not None and login_password is not None:
|
|
client.admin.authenticate(login_user, login_password)
|
|
# =========================================
|
|
# Module execution.
|
|
#
|
|
|
|
def main():
|
|
module = AnsibleModule(
|
|
argument_spec = dict(
|
|
login_user=dict(default=None),
|
|
login_password=dict(default=None),
|
|
login_host=dict(default='localhost'),
|
|
login_port=dict(default='27017'),
|
|
replica_set=dict(default=None),
|
|
host_name=dict(default='localhost'),
|
|
host_port=dict(default='27017'),
|
|
host_type=dict(default='replica', choices=['replica','arbiter']),
|
|
ssl=dict(default=False),
|
|
build_indexes = dict(type='bool', choices=BOOLEANS, default='yes'),
|
|
hidden = dict(type='bool', choices=BOOLEANS, default='no'),
|
|
priority = dict(default='1.0'),
|
|
slave_delay = dict(type='int', default='0'),
|
|
votes = dict(type='int', default='1'),
|
|
state=dict(default='present', choices=['absent', 'present']),
|
|
)
|
|
)
|
|
|
|
if not pymongo_found:
|
|
module.fail_json(msg='the python pymongo (>= 2.4) module is required')
|
|
|
|
login_user = module.params['login_user']
|
|
login_password = module.params['login_password']
|
|
login_host = module.params['login_host']
|
|
login_port = module.params['login_port']
|
|
replica_set = module.params['replica_set']
|
|
host_name = module.params['host_name']
|
|
host_port = module.params['host_port']
|
|
host_type = module.params['host_type']
|
|
ssl = module.params['ssl']
|
|
state = module.params['state']
|
|
|
|
replica_set_created = False
|
|
|
|
try:
|
|
if replica_set is None:
|
|
module.fail_json(msg='replica_set parameter is required')
|
|
else:
|
|
client = MongoReplicaSetClient(login_host, int(login_port), replicaSet=replica_set, ssl=ssl)
|
|
|
|
authenticate(client, login_user, login_password)
|
|
|
|
except ConnectionFailure, e:
|
|
module.fail_json(msg='unable to connect to database: %s' % str(e))
|
|
except ConfigurationError:
|
|
try:
|
|
client = MongoClient(login_host, int(login_port), ssl=ssl)
|
|
authenticate(client, login_user, login_password)
|
|
if state == 'present':
|
|
config = { '_id': "{0}".format(replica_set), 'members': [{ '_id': 0, 'host': "{0}:{1}".format(host_name, host_port)}] }
|
|
client['admin'].command('replSetInitiate', config)
|
|
wait_for_ok_and_master(module, client)
|
|
replica_set_created = True
|
|
module.exit_json(changed=True, host_name=host_name, host_port=host_port, host_type=host_type)
|
|
except OperationFailure, e:
|
|
module.fail_json(msg='Unable to initiate replica set: %s' % str(e))
|
|
|
|
check_members(state, module, client, host_name, host_port, host_type)
|
|
|
|
if state == 'present':
|
|
if host_name is None and not replica_set_created:
|
|
module.fail_json(msg='host_name parameter required when adding new host into replica set')
|
|
|
|
try:
|
|
if not replica_set_created:
|
|
add_host(module, client, host_name, host_port, host_type,
|
|
build_indexes = module.params['build_indexes'],
|
|
hidden = module.params['hidden'],
|
|
priority = float(module.params['priority']),
|
|
slave_delay = module.params['slave_delay'],
|
|
votes = module.params['votes'])
|
|
except OperationFailure, e:
|
|
module.fail_json(msg='Unable to add new member to replica set: %s' % str(e))
|
|
|
|
elif state == 'absent':
|
|
try:
|
|
remove_host(module, client, host_name)
|
|
except OperationFailure, e:
|
|
module.fail_json(msg='Unable to remove member of replica set: %s' % str(e))
|
|
|
|
module.exit_json(changed=True, host_name=host_name, host_port=host_port, host_type=host_type)
|
|
|
|
# import module snippets
|
|
from ansible.module_utils.basic import *
|
|
main()
|