New module: helm (#24883)

This PR adds a new module, helm, which can be used to manage Kubernetes Helm, the package manager for k8s.

lib/ansible/modules/cloud/helm.py

@@ -0,0 +1,204 @@
+#!/usr/bin/python
+# (c) 2016, Flavio Percoco <flavio@redhat.com>
+#
+# This module 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.
+#
+# This software 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 this software.  If not, see <http://www.gnu.org/licenses/>.
+
+ANSIBLE_METADATA = {'metadata_version': '1.0',
+                    'status': ['preview'],
+                    'supported_by': 'community'}
+
+DOCUMENTATION = '''
+---
+module: helm
+short_description: Manages Kubernetes packages with the Helm package manager
+version_added: "2.4"
+author: "Flavio Percoco (flaper87)"
+description:
+   - Install, upgrade, delete and list packages with the Helm package manage
+requirements:
+  - "pyhelm"
+  - "grpcio"
+options:
+  host:
+    description:
+      - Tiller's server host
+    required: false
+    default: "localhost"
+  port:
+    description:
+      - Tiller's server port
+    required: false
+    default: 44134
+  namespace:
+    description:
+      - Kubernetes namespace where the chart should be installed
+    required: false
+    default: "default"
+  name:
+    description:
+      - Release name to manage
+    required: false
+    default: null
+  state:
+    description:
+      - Whether to install C(present), remove C(absent), or purge C(purged) a package.
+    required: false
+    choices: ['absent', 'purged', 'present']
+    default: "installed"
+  chart:
+    description: |
+      A map describing the chart to install. For example:
+      chart:
+        name: memcached
+        version: 0.4.0
+        source:
+          type: repo
+          location: https://kubernetes-charts.storage.googleapis.com
+    required: false
+    default: {}
+  values:
+    description:
+      - A map of value options for the chart.
+    required: false
+    default: {}
+  disable_hooks:
+    description:
+      - Whether to disable hooks during the uninstall process
+    required: false
+    default: false
+'''
+
+RETURN = ''' # '''
+
+EXAMPLES = '''
+- name: Install helm chart
+  helm:
+    host: localhost
+    chart:
+      name: memcached
+      version: 0.4.0
+      source:
+        type: repo
+        location: https://kubernetes-charts.storage.googleapis.com
+    state: installed
+    name: my-memcached
+    namespace: default
+
+- name: Uninstall helm chart
+  helm:
+    host: localhost
+    state: absent
+    name: my-memcached
+'''
+
+
+import os
+
+try:
+    import grpc
+    from pyhelm import tiller
+    from pyhelm import chartbuilder
+    HAS_PYHELM = True
+except ImportError as exc:
+    HAS_PYHELM = False
+
+
+from ansible.module_utils.basic import AnsibleModule
+
+
+def install(module, tserver):
+    changed = False
+    params = module.params
+    name = params['name']
+    values = params['values']
+    chart = module.params['chart']
+    namespace = module.params['namespace']
+
+    chartb = chartbuilder.ChartBuilder(chart)
+    try:
+        result = tserver.install_release(chartb.get_helm_chart(), namespace,
+                                         dry_run=False, name=name,
+                                         values=values)
+        changed = True
+    except grpc._channel._Rendezvous as exc:
+        if "already exists" not in str(exc):
+            raise exc
+
+    return dict(changed=changed)
+
+
+def delete(module, tserver, purge=False):
+    changed = False
+    params = module.params
+
+    if not module.params['name']:
+        module.fail_json(msg='Missing required field name')
+
+    name = module.params['name']
+    disable_hooks = params['disable_hooks']
+
+    try:
+        result = tserver.uninstall_release(name, disable_hooks, purge)
+        changed = True
+    except grpc._channel._Rendezvous as exc:
+        if 'not found' not in str(exc):
+            raise exc
+
+    return dict(changed=changed)
+
+
+def main():
+    """The main function."""
+    module = AnsibleModule(
+        argument_spec=dict(
+            host=dict(type='str', default='localhost'),
+            port=dict(type='int', default=44134),
+            name=dict(type='str', default=''),
+            chart=dict(type='dict'),
+            state=dict(
+                choices=['absent', 'purged', 'present'],
+                default='present'
+            ),
+            # Install options
+            values=dict(type='dict'),
+            namespace=dict(type='str', default='default'),
+
+            # Uninstall options
+            disable_hooks=dict(type='bool', default=False),
+        ),
+        supports_check_mode=True)
+
+    if not HAS_PYHELM:
+        module.fail_json(msg="Could not import the pyhelm python module. "
+                         "Please install `pyhelm` package.")
+
+    host = module.params['host']
+    port = module.params['port']
+    state = module.params['state']
+    tserver = tiller.Tiller(host, port)
+
+    if state == 'present':
+        rst = install(module, tserver)
+
+    if state in 'absent':
+        rst = delete(module, tserver)
+
+    if state in 'purged':
+        rst = delete(module, tserver, True)
+
+    module.exit_json(**rst)
+
+
+if __name__ == '__main__':
+    main()