Merge pull request #3434 from giuseppe/system-containers-module

System containers module

1 files changed, 203 insertions, 0 deletions

diff --git a/roles/lib_openshift/library/oc_atomic_container.py b/roles/lib_openshift/library/oc_atomic_container.py
new file mode 100644
index 000000000..d2620b4cc
--- /dev/null
+++ b/roles/lib_openshift/library/oc_atomic_container.py
@@ -0,0 +1,203 @@
+#!/usr/bin/env python
+# pylint: disable=missing-docstring
+# flake8: noqa: T001
+#     ___ ___ _  _ ___ ___    _ _____ ___ ___
+#    / __| __| \| | __| _ \  /_\_   _| __|   \
+#   | (_ | _|| .` | _||   / / _ \| | | _|| |) |
+#    \___|___|_|\_|___|_|_\/_/_\_\_|_|___|___/_ _____
+#   |   \ / _ \  | \| |/ _ \_   _| | __|   \_ _|_   _|
+#   | |) | (_) | | .` | (_) || |   | _|| |) | |  | |
+#   |___/ \___/  |_|\_|\___/ |_|   |___|___/___| |_|
+#
+# Copyright 2016 Red Hat, Inc. and/or its affiliates
+# and other contributors as indicated by the @author tags.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+# -*- -*- -*- Begin included fragment: doc/atomic_container -*- -*- -*-
+
+DOCUMENTATION = '''
+---
+module: oc_atomic_container
+short_description: Manage the container images on the atomic host platform
+description:
+    - Manage the container images on the atomic host platform
+    - Allows to execute the commands on the container images
+requirements:
+  - atomic
+  - "python >= 2.6"
+options:
+    name:
+        description:
+          - Name of the container
+        required: True
+        default: null
+    image:
+        description:
+          - The image to use to install the container
+        required: True
+        default: null
+    state:
+        description:
+          - State of the container
+        required: True
+        choices: ["latest", "absent", "latest", "rollback"]
+        default: "latest"
+    values:
+        description:
+          - Values for the installation of the container
+        required: False
+        default: None
+'''
+
+# -*- -*- -*- End included fragment: doc/atomic_container -*- -*- -*-
+
+# -*- -*- -*- Begin included fragment: ansible/oc_atomic_container.py -*- -*- -*-
+
+# pylint: disable=wrong-import-position,too-many-branches,invalid-name
+import json
+from ansible.module_utils.basic import AnsibleModule
+
+
+def _install(module, container, image, values_list):
+    ''' install a container using atomic CLI.  values_list is the list of --set arguments.
+    container is the name given to the container.  image is the image to use for the installation. '''
+    args = ['atomic', 'install', "--system", '--name=%s' % container] + values_list + [image]
+    rc, out, err = module.run_command(args, check_rc=False)
+    if rc != 0:
+        return rc, out, err, False
+    else:
+        changed = "Extracting" in out
+        return rc, out, err, changed
+
+def _uninstall(module, name):
+    ''' uninstall an atomic container by its name. '''
+    args = ['atomic', 'uninstall', name]
+    rc, out, err = module.run_command(args, check_rc=False)
+    return rc, out, err, False
+
+
+def do_install(module, container, image, values_list):
+    ''' install a container and exit the module. '''
+    rc, out, err, changed = _install(module, container, image, values_list)
+    if rc != 0:
+        module.fail_json(rc=rc, msg=err)
+    else:
+        module.exit_json(msg=out, changed=changed)
+
+
+def do_uninstall(module, name):
+    ''' uninstall a container and exit the module. '''
+    rc, out, err, changed = _uninstall(module, name)
+    if rc != 0:
+        module.fail_json(rc=rc, msg=err)
+    module.exit_json(msg=out, changed=changed)
+
+
+def do_update(module, container, old_image, image, values_list):
+    ''' update a container and exit the module.  If the container uses a different
+    image than the current installed one, then first uninstall the old one '''
+
+    # the image we want is different than the installed one
+    if old_image != image:
+        rc, out, err, _ = _uninstall(module, container)
+        if rc != 0:
+            module.fail_json(rc=rc, msg=err)
+        return do_install(module, container, image, values_list)
+
+    # if the image didn't change, use "atomic containers update"
+    args = ['atomic', 'containers', 'update'] + values_list + [container]
+    rc, out, err = module.run_command(args, check_rc=False)
+    if rc != 0:
+        module.fail_json(rc=rc, msg=err)
+    else:
+        changed = "Extracting" in out
+        module.exit_json(msg=out, changed=changed)
+
+
+def do_rollback(module, name):
+    ''' move to the previous deployment of the container, if present, and exit the module. '''
+    args = ['atomic', 'containers', 'rollback', name]
+    rc, out, err = module.run_command(args, check_rc=False)
+    if rc != 0:
+        module.fail_json(rc=rc, msg=err)
+    else:
+        changed = "Rolling back" in out
+        module.exit_json(msg=out, changed=changed)
+
+
+def core(module):
+    ''' entrypoint for the module. '''
+    name = module.params['name']
+    image = module.params['image']
+    values = module.params['values']
+    state = module.params['state']
+
+    module.run_command_environ_update = dict(LANG='C', LC_ALL='C', LC_MESSAGES='C')
+    out = {}
+    err = {}
+    rc = 0
+
+    values_list = ["--set=%s" % x for x in values] if values else []
+
+    args = ['atomic', 'containers', 'list', '--json', '--all', '-f', 'container=%s' % name]
+    rc, out, err = module.run_command(args, check_rc=False)
+    if rc != 0:
+        module.fail_json(rc=rc, msg=err)
+        return
+
+    containers = json.loads(out)
+    present = len(containers) > 0
+    old_image = containers[0]["image_name"] if present else None
+
+    if state == 'present' and present:
+        module.exit_json(msg=out, changed=False)
+    elif (state in ['latest', 'present']) and not present:
+        do_install(module, name, image, values_list)
+    elif state == 'latest':
+        do_update(module, name, old_image, image, values_list)
+    elif state == 'absent':
+        if not present:
+            module.exit_json(msg="", changed=False)
+        else:
+            do_uninstall(module, name)
+    elif state == 'rollback':
+        do_rollback(module, name)
+
+
+def main():
+    module = AnsibleModule(
+        argument_spec=dict(
+            name=dict(default=None, required=True),
+            image=dict(default=None, required=True),
+            state=dict(default='latest', choices=['present', 'absent', 'latest', 'rollback']),
+            values=dict(type='list', default=[]),
+            ),
+        )
+
+    # Verify that the platform supports atomic command
+    rc, _, err = module.run_command('atomic -v', check_rc=False)
+    if rc != 0:
+        module.fail_json(msg="Error in running atomic command", err=err)
+
+    try:
+        core(module)
+    except Exception as e:  # pylint: disable=broad-except
+        module.fail_json(msg=str(e))
+
+
+if __name__ == '__main__':
+    main()
+
+# -*- -*- -*- End included fragment: ansible/oc_atomic_container.py -*- -*- -*-