Use Docker healthchecks for sahara services

This change enables the use of Docker healthchecks for sahara
services.
Implements: blueprint container-health-check

Change-Id: I091ce194cc3180d500e287832810b499d7b100be

ansible/roles/sahara/defaults/main.yml

@@ -9,6 +9,7 @@ sahara_services:
     image: "{{ sahara_api_image_full }}"
     volumes: "{{ sahara_api_default_volumes + sahara_api_extra_volumes }}"
     dimensions: "{{ sahara_api_dimensions }}"
+    healthcheck: "{{ sahara_api_healthcheck }}"
     haproxy:
       sahara_api:
         enabled: "{{ enable_sahara }}"
@@ -28,6 +29,7 @@ sahara_services:
     privileged: True
     volumes: "{{ sahara_engine_default_volumes + sahara_engine_extra_volumes }}"
     dimensions: "{{ sahara_engine_dimensions }}"
+    healthcheck: "{{ sahara_engine_healthcheck }}"
 
 
 ####################
@@ -55,6 +57,32 @@ sahara_api_image_full: "{{ sahara_api_image }}:{{ sahara_api_tag }}"
 sahara_api_dimensions: "{{ default_container_dimensions }}"
 sahara_engine_dimensions: "{{ default_container_dimensions }}"
 
+sahara_api_enable_healthchecks: "{{ enable_container_healthchecks }}"
+sahara_api_healthcheck_interval: "{{ default_container_healthcheck_interval }}"
+sahara_api_healthcheck_retries: "{{ default_container_healthcheck_retries }}"
+sahara_api_healthcheck_start_period: "{{ default_container_healthcheck_start_period }}"
+sahara_api_healthcheck_test: ["CMD-SHELL", "healthcheck_curl http://{{ api_interface_address |  put_address_in_context('url') }}:{{ sahara_api_port }}"]
+sahara_api_healthcheck_timeout: "{{ default_container_healthcheck_timeout }}"
+sahara_api_healthcheck:
+  interval: "{{ sahara_api_healthcheck_interval }}"
+  retries: "{{ sahara_api_healthcheck_retries }}"
+  start_period: "{{ sahara_api_healthcheck_start_period }}"
+  test: "{% if sahara_api_enable_healthchecks | bool %}{{ sahara_api_healthcheck_test }}{% else %}NONE{% endif %}"
+  timeout: "{{ sahara_api_healthcheck_timeout }}"
+
+sahara_engine_enable_healthchecks: "{{ enable_container_healthchecks }}"
+sahara_engine_healthcheck_interval: "{{ default_container_healthcheck_interval }}"
+sahara_engine_healthcheck_retries: "{{ default_container_healthcheck_retries }}"
+sahara_engine_healthcheck_start_period: "{{ default_container_healthcheck_start_period }}"
+sahara_engine_healthcheck_test: ["CMD-SHELL", "healthcheck_port sahara_engine {{ om_rpc_port }}"]
+sahara_engine_healthcheck_timeout: "{{ default_container_healthcheck_timeout }}"
+sahara_engine_healthcheck:
+  interval: "{{ sahara_engine_healthcheck_interval }}"
+  retries: "{{ sahara_engine_healthcheck_retries }}"
+  start_period: "{{ sahara_engine_healthcheck_start_period }}"
+  test: "{% if sahara_engine_enable_healthchecks | bool %}{{ sahara_engine_healthcheck_test }}{% else %}NONE{% endif %}"
+  timeout: "{{ sahara_engine_healthcheck_timeout }}"
+
 sahara_api_default_volumes:
   - "{{ node_config_directory }}/sahara-api/:{{ container_config_directory }}/:ro"
   - "/etc/localtime:/etc/localtime:ro"

ansible/roles/sahara/handlers/main.yml

@@ -11,6 +11,7 @@
     image: "{{ service.image }}"
     volumes: "{{ service.volumes|reject('equalto', '')|list }}"
     dimensions: "{{ service.dimensions }}"
+    healthcheck: "{{ service.healthcheck | default(omit) }}"
   when:
     - kolla_action != "config"
 
@@ -27,5 +28,6 @@
     volumes: "{{ service.volumes|reject('equalto', '')|list }}"
     privileged: "{{ service.privileged | default(False) }}"
     dimensions: "{{ service.dimensions }}"
+    healthcheck: "{{ service.healthcheck | default(omit) }}"
   when:
     - kolla_action != "config"

ansible/roles/sahara/tasks/check-containers.yml

@@ -9,6 +9,7 @@
     privileged: "{{ item.value.privileged | default(False) }}"
     volumes: "{{ item.value.volumes|reject('equalto', '')|list }}"
     dimensions: "{{ item.value.dimensions }}"
+    healthcheck: "{{ item.value.healthcheck | default(omit) }}"
   when:
     - inventory_hostname in groups[item.value.group]
     - item.value.enabled | bool

releasenotes/notes/implement-docker-healthchecks-for-sahara-d04dce89744e2819.yaml

@@ -0,0 +1,6 @@
+---
+features:
+  - |
+    Implements container healthchecks for sahara services.
+    See `blueprint
+    <https://blueprints.launchpad.net/kolla-ansible/+spec/container-health-check>`__