Add kolla_docker action for reconfigure

add three actions used for reconfigure

* restart_container
* get_container_env
* get_container_state

Partially-implements: bp kolla-reconfig

Change-Id: I63609ce47f044926ff276ab1188b10f44270a0b5

ansible/library/kolla_docker.py

@@ -35,9 +35,12 @@ options:
     choices:
       - compare_image
       - create_volume
+      - get_container_env
+      - get_container_state
       - pull_image
       - remove_container
       - remove_volume
+      - restart_container
       - start_container
       - stop_container
   api_version:
@@ -500,6 +503,30 @@ class DockerWorker(object):
             if self.params.get('remove_on_exit'):
                 self.remove_container()
 
+    def get_container_env(self):
+        name = self.params.get('name')
+        info = self.get_container_info()
+        if not info:
+            self.module.fail_json(msg="No such container: {}".format(name))
+        else:
+            envs = dict()
+            for env in info['Config']['Env']:
+                if '=' in env:
+                    key, value = env.split('=', 1)
+                else:
+                    key, value = env, ''
+                envs[key] = value
+
+            self.module.exit_json(**envs)
+
+    def get_container_state(self):
+        name = self.params.get('name')
+        info = self.get_container_info()
+        if not info:
+            self.module.fail_json(msg="No such container: {}".format(name))
+        else:
+            self.module.exit_json(**info['State'])
+
     def stop_container(self):
         name = self.params.get('name')
         container = self.check_container()
@@ -507,6 +534,16 @@ class DockerWorker(object):
             self.changed = True
             self.dc.stop(name)
 
+    def restart_container(self):
+        name = self.params.get('name')
+        info = self.get_container_info()
+        if not info:
+            self.module.fail_json(
+                msg="No such container: {}".format(name))
+        else:
+            self.changed = True
+            self.dc.restart(name)
+
     def create_volume(self):
         if not self.check_volume():
             self.changed = True
@@ -533,9 +570,12 @@ def generate_module():
         common_options=dict(required=False, type='dict', default=dict()),
         action=dict(requried=True, type='str', choices=['compare_image',
                                                         'create_volume',
+                                                        'get_container_env',
+                                                        'get_container_state',
                                                         'pull_image',
                                                         'remove_container',
                                                         'remove_volume',
+                                                        'restart_container',
                                                         'start_container',
                                                         'stop_container']),
         api_version=dict(required=False, type='str', default='auto'),

ansible/roles/keystone/tasks/do_reconfigure.yml

@@ -1,39 +1,64 @@
 ---
+- name: Ensuring the containers up
+  kolla_docker:
+    name: "{{ item.name }}"
+    action: "get_container_state"
+  register: container_state
+  failed_when: container_state.Running == false
+  when: inventory_hostname in groups[item.group]
+  with_items:
+    - { name: keystone, group: keystone }
+
 - include: config.yml
 
 - name: Check the configs
-  command: docker exec keystone /usr/local/bin/kolla_set_configs --check
+  command: docker exec {{ item.name }} /usr/local/bin/kolla_set_configs --check
   changed_when: false
   failed_when: false
-  register: check_result
+  register: check_results
+  when: inventory_hostname in groups[item.group]
+  with_items:
+    - { name: keystone, group: keystone }
 
 # NOTE(jeffrey4l): when config_strategy == 'COPY_ALWAYS'
 # and container env['KOLLA_CONFIG_STRATEGY'] == 'COPY_ONCE',
 # just remove the container and start again
-- name: Container config strategy
-  command: docker exec keystone printenv KOLLA_CONFIG_STRATEGY
-  changed_when: false
-  failed_when: false
-  register: container_config_strategy
-
-- name: Remove the keystone container
+- name: Containers config strategy
   kolla_docker:
-    name: "keystone"
+    name: "{{ item.name }}"
+    action: "get_container_env"
+  register: container_envs
+  when: inventory_hostname in groups[item.group]
+  with_items:
+    - { name: keystone, group: keystone }
+
+- name: Remove the containers
+  kolla_docker:
+    name: "{{ item[0]['name'] }}"
     action: "remove_container"
+  register: remove_containers
   when:
-    - config_strategy == "COPY_ONCE" or container_config_strategy.stdout == 'COPY_ONCE'
-    - check_result.rc == 1
+    - config_strategy == "COPY_ONCE" or item[1]['KOLLA_CONFIG_STRATEGY'] == 'COPY_ONCE'
+    - item[2]['rc'] == 1
+    - inventory_hostname in groups[item[0]['group']]
+  with_together:
+    - [{ name: keystone, group: keystone }]
+    - container_envs.results
+    - check_results.results
 
 - include: start.yml
-  when:
-    - config_strategy == "COPY_ONCE" or container_config_strategy.stdout == 'COPY_ONCE'
-    - check_result.rc == 1
+  when: remove_containers.changed
 
-- name: Restart keystone service
-  # TODO(jeffrey4l): move to the kolla_docker module when
-  # it has restart_container action
-  command: docker restart keystone
+- name: Restart containers
+  kolla_docker:
+    name: "{{ item[0]['name'] }}"
+    action: "restart_container"
   when:
     - config_strategy == 'COPY_ALWAYS'
-    - container_config_strategy.stdout != 'COPY_ONCE'
-    - check_result.rc == 1
+    - item[1]['KOLLA_CONFIG_STRATEGY'] != 'COPY_ONCE'
+    - item[2]['rc'] == 1
+    - inventory_hostname in groups[item[0]['group']]
+  with_together:
+    - [{ name: keystone, group: keystone }]
+    - container_envs.results
+    - check_results.results