Add sensu_subscription module (#205)

monitoring/sensu_subscription.py

@@ -0,0 +1,159 @@
+#!/usr/bin/python
+# -*- coding: utf-8 -*-
+
+# (c) 2014, Anders Ingemann <aim@secoya.dk>
+#
+# 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: sensu_subscription
+short_description: Manage Sensu subscriptions
+version_added: 2.2
+description:
+  - Manage which I(sensu channels) a machine should subscribe to
+options:
+  name:
+    description:
+      - The name of the channel
+    required: true
+  state:
+    description:
+      - Whether the machine should subscribe or unsubscribe from the channel
+    choices: [ 'present', 'absent' ]
+    required: false
+    default: present
+  path:
+    description:
+      - Path to the subscriptions json file
+    required: false
+    default: /etc/sensu/conf.d/subscriptions.json
+  backup:
+    description:
+      - Create a backup file (if yes), including the timestamp information so you
+      - can get the original file back if you somehow clobbered it incorrectly.
+    choices: [ 'yes', 'no' ]
+    required: false
+    default: no
+requirements: [ ]
+author: Anders Ingemann
+'''
+
+RETURN = '''
+reasons:
+    description: the reasons why the moule changed or did not change something
+    returned: success
+    type: list
+    sample: ["channel subscription was absent and state is `present'"]
+'''
+
+EXAMPLES = '''
+# Subscribe to the nginx channel
+- name: subscribe to nginx checks
+  sensu_subscription: name=nginx
+
+# Unsubscribe from the common checks channel
+- name: unsubscribe from common checks
+  sensu_subscription: name=common state=absent
+'''
+
+
+def sensu_subscription(module, path, name, state='present', backup=False):
+    changed = False
+    reasons = []
+
+    try:
+        import json
+    except ImportError:
+        import simplejson as json
+
+    try:
+        config = json.load(open(path))
+    except IOError, e:
+        if e.errno is 2:  # File not found, non-fatal
+            if state == 'absent':
+                reasons.append('file did not exist and state is `absent\'')
+                return changed, reasons
+            config = {}
+        else:
+            module.fail_json(msg=str(e))
+    except ValueError:
+        msg = '{path} contains invalid JSON'.format(path=path)
+        module.fail_json(msg=msg)
+
+    if 'client' not in config:
+        if state == 'absent':
+            reasons.append('`client\' did not exist and state is `absent\'')
+            return changed, reasons
+        config['client'] = {}
+        changed = True
+        reasons.append('`client\' did not exist')
+
+    if 'subscriptions' not in config['client']:
+        if state == 'absent':
+            reasons.append('`client.subscriptions\' did not exist and state is `absent\'')
+            return changed
+        config['client']['subscriptions'] = []
+        changed = True
+        reasons.append('`client.subscriptions\' did not exist')
+
+    if name not in config['client']['subscriptions']:
+        if state == 'absent':
+            reasons.append('channel subscription was absent')
+            return changed
+        config['client']['subscriptions'].append(name)
+        changed = True
+        reasons.append('channel subscription was absent and state is `present\'')
+    else:
+        if state == 'absent':
+            config['client']['subscriptions'].remove(name)
+            changed = True
+            reasons.append('channel subscription was present and state is `absent\'')
+
+    if changed and not module.check_mode:
+        if backup:
+            module.backup_local(path)
+        try:
+            open(path, 'w').write(json.dumps(config, indent=2) + '\n')
+        except IOError, e:
+            module.fail_json(msg=str(e))
+
+    return changed, reasons
+
+
+def main():
+    arg_spec = {'name':   {'type': 'str', 'required': True},
+                'path':   {'type': 'str', 'default': '/etc/sensu/conf.d/subscriptions.json'},
+                'state':  {'type': 'str', 'default': 'present', 'choices': ['present', 'absent']},
+                'backup': {'type': 'str', 'default': 'no', 'type': 'bool'},
+                }
+
+    module = AnsibleModule(argument_spec=arg_spec,
+                           supports_check_mode=True)
+
+    path = module.params['path']
+    name = module.params['name']
+    state = module.params['state']
+    backup = module.params['backup']
+
+    changed, reasons = sensu_subscription(module, path, name, state, backup)
+
+    module.exit_json(path=path, name=name, changed=changed, msg='OK', reasons=reasons)
+
+from ansible.module_utils.basic import *
+if __name__ == '__main__':
+    main()