Optimize reconfiguration for mongodb

Change-Id: If3828170c00a9c5327b94d9253be93aefa147db9
Partially-implements: blueprint better-reconfigure

ansible/roles/mongodb/defaults/main.yml

@@ -1,6 +1,19 @@
 ---
 project_name: "mongodb"
 
+mongodb_services:
+  mongodb:
+    container_name: mongodb
+    group: mongodb
+    enabled: true
+    privileged: True
+    image: "{{ mongodb_image_full }}"
+    volumes:
+      - "{{ node_config_directory }}/mongodb/:{{ container_config_directory }}/:ro"
+      - "/etc/localtime:/etc/localtime:ro"
+      - "kolla_logs:/var/log/kolla/"
+      - "mongodb:/var/lib/mongodb"
+
 
 ####################
 # Docker

ansible/roles/mongodb/handlers/main.yml

@@ -0,0 +1,38 @@
+---
+- name: Restart mongodb container
+  vars:
+    service_name: "mongodb"
+    service: "{{ mongodb_services[service_name] }}"
+    config_json: "{{ mongodb_config_jsons.results|selectattr('item.key', 'equalto', service_name)|first }}"
+    mongodb_conf: "{{ mongodb_confs.results|selectattr('item.key', 'equalto', service_name)|first }}"
+    mongodb_container: "{{ check_mongodb_containers.results|selectattr('item.key', 'equalto', service_name)|first }}"
+  kolla_docker:
+    action: "recreate_or_restart_container"
+    common_options: "{{ docker_common_options }}"
+    name: "{{ service.container_name }}"
+    image: "{{ service.image }}"
+    privileged: "{{ service.privileged | default(False) }}"
+    volumes: "{{ service.volumes }}"
+  when:
+    - action != "config"
+    - inventory_hostname in groups[service.group]
+    - service.enabled | bool
+    - config_json.changed | bool
+      or mongodb_conf.changed | bool
+      or mongodb_container.changed | bool
+  notify:
+    - Waiting for the mongodb startup
+    - Checking current replication status
+
+- name: Waiting for the mongodb startup
+  wait_for: host={{ hostvars[inventory_hostname]['ansible_' + api_interface]['ipv4']['address'] }} port={{ mongodb_port }}
+
+- name: Checking current replication status
+  command: "docker exec -t mongodb mongo {{ hostvars[inventory_hostname]['ansible_' + api_interface]['ipv4']['address'] }} --quiet --eval rs.status().ok"
+  register: mongodb_replication_status
+  changed_when: false
+  delegate_to: "{{ groups['mongodb'][0] }}"
+  run_once: True
+
+- include: "bootstrap_cluster.yml"
+  when: mongodb_replication_status.stdout != "1"

ansible/roles/mongodb/tasks/config.yml

@@ -1,22 +1,51 @@
 ---
 - name: Ensuring config directories exist
   file:
-    path: "{{ node_config_directory }}/{{ item }}"
+    path: "{{ node_config_directory }}/{{ item.key }}"
     state: "directory"
     recurse: yes
-  with_items:
-    - "mongodb"
+  when:
+    - inventory_hostname in groups[item.value.group]
+    - item.value.enabled | bool
+  with_dict: "{{ mongodb_services }}"
 
 - name: Copying over config.json files for services
   template:
-    src: "{{ item }}.json.j2"
-    dest: "{{ node_config_directory }}/{{ item }}/config.json"
-  with_items:
-    - "mongodb"
+    src: "{{ item.key }}.json.j2"
+    dest: "{{ node_config_directory }}/{{ item.key }}/config.json"
+  register: mongodb_config_jsons
+  when:
+    - inventory_hostname in groups[item.value.group]
+    - item.value.enabled | bool
+  with_dict: "{{ mongodb_services }}"
+  notify:
+    - Restart mongodb container
 
 - name: Copying over mongodb.conf
   template:
-    src: "{{ item }}.j2"
-    dest: "{{ node_config_directory }}/mongodb/{{ item }}"
-  with_items:
-     - "mongodb.conf"
+    src: "{{ item.key }}.conf.j2"
+    dest: "{{ node_config_directory }}/mongodb/{{ item.key }}.conf"
+  register: mongodb_confs
+  when:
+    - inventory_hostname in groups[item.value.group]
+    - item.value.enabled | bool
+  with_dict: "{{ mongodb_services }}"
+  notify:
+    - Restart mongodb container
+
+- name: Check mongodb containers
+  kolla_docker:
+    action: "compare_container"
+    common_options: "{{ docker_common_options }}"
+    name: "{{ item.value.container_name }}"
+    image: "{{ item.value.image }}"
+    privileged: "{{ item.value.privileged|default(False) }}"
+    volumes: "{{ item.value.volumes }}"
+  register: check_mongodb_containers
+  when:
+    - action != "config"
+    - inventory_hostname in groups[item.value.group]
+    - item.value.enabled | bool
+  with_dict: "{{ mongodb_services }}"
+  notify:
+    - Restart mongodb container

ansible/roles/mongodb/tasks/deploy.yml

@@ -3,4 +3,5 @@
 
 - include: bootstrap.yml
 
-- include: start.yml
+- name: Flush handlers
+  meta: flush_handlers

ansible/roles/mongodb/tasks/pull.yml

@@ -3,5 +3,8 @@
   kolla_docker:
     action: "pull_image"
     common_options: "{{ docker_common_options }}"
-    image: "{{ mongodb_image_full }}"
-  when: inventory_hostname in groups['mongodb']
+    image: "{{ item.value.image }}"
+  when:
+    - inventory_hostname in groups[item.value.group]
+    - item.value.enabled | bool
+  with_dict: "{{ mongodb_services }}"

ansible/roles/mongodb/tasks/reconfigure.yml

@@ -1,64 +1,2 @@
 ---
-- 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: mongodb, group: mongodb }
-
-- include: config.yml
-
-- name: Check the configs
-  command: docker exec {{ item.name }} /usr/local/bin/kolla_set_configs --check
-  changed_when: false
-  failed_when: false
-  register: check_results
-  when: inventory_hostname in groups[item.group]
-  with_items:
-    - { name: mongodb, group: mongodb }
-
-# NOTE(jeffrey4l): when config_strategy == 'COPY_ALWAYS'
-# and container env['KOLLA_CONFIG_STRATEGY'] == 'COPY_ONCE',
-# just remove the container and start again
-- name: Containers config strategy
-  kolla_docker:
-    name: "{{ item.name }}"
-    action: "get_container_env"
-  register: container_envs
-  when: inventory_hostname in groups[item.group]
-  with_items:
-    - { name: mongodb, group: mongodb }
-
-- name: Remove the containers
-  kolla_docker:
-    name: "{{ item[0]['name'] }}"
-    action: "remove_container"
-  register: remove_containers
-  when:
-    - 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: mongodb, group: mongodb }]
-    - "{{ container_envs.results }}"
-    - "{{ check_results.results }}"
-
-- include: start.yml
-  when: remove_containers.changed
-
-- name: Restart containers
-  kolla_docker:
-    name: "{{ item[0]['name'] }}"
-    action: "restart_container"
-  when:
-    - config_strategy == 'COPY_ALWAYS'
-    - item[1]['KOLLA_CONFIG_STRATEGY'] != 'COPY_ONCE'
-    - item[2]['rc'] == 1
-    - inventory_hostname in groups[item[0]['group']]
-  with_together:
-    - [{ name: mongodb, group: mongodb }]
-    - "{{ container_envs.results }}"
-    - "{{ check_results.results }}"
+- include: deploy.yml

ansible/roles/mongodb/tasks/start.yml

@@ -1,26 +0,0 @@
----
-- name: Starting mongodb container
-  kolla_docker:
-    action: "start_container"
-    common_options: "{{ docker_common_options }}"
-    image: "{{ mongodb_image_full }}"
-    name: "mongodb"
-    privileged: True
-    volumes:
-      - "{{ node_config_directory }}/mongodb/:{{ container_config_directory }}/:ro"
-      - "/etc/localtime:/etc/localtime:ro"
-      - "kolla_logs:/var/log/kolla/"
-      - "mongodb:/var/lib/mongodb"
-
-- name: Waiting for the mongodb startup
-  wait_for: host={{ api_interface_address }} port={{ mongodb_port }}
-
-- name: Checking current replication status
-  command: "docker exec -t mongodb mongo {{ api_interface_address }} --quiet --eval rs.status().ok"
-  register: mongodb_replication_status
-  changed_when: false
-  delegate_to: "{{ groups['mongodb'][0] }}"
-  run_once: True
-
-- include: "bootstrap_cluster.yml"
-  when: mongodb_replication_status.stdout != "1"

ansible/roles/mongodb/tasks/upgrade.yml

@@ -1,4 +1,5 @@
 ---
 - include: config.yml
 
-- include: start.yml
+- name: Flush handlers
+  meta: flush_handlers