Use Docker healthchecks for zookeeper services

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

Change-Id: I344115580840f3aa3f872c6136492f7bd7b73db8

ansible/roles/zookeeper/defaults/main.yml

@@ -12,6 +12,8 @@ zookeeper_services:
       ZOO_LOG4J_PROP: "{{ zookeeper_log_settings }}"
     volumes: "{{ zookeeper_default_volumes + zookeeper_extra_volumes }}"
     dimensions: "{{ zookeeper_dimensions }}"
+    healthcheck: "{{ zookeeper_healthcheck }}"
+
 
 ####################
 # Zookeeper
@@ -27,6 +29,19 @@ zookeeper_tag: "{{ openstack_tag }}"
 zookeeper_image_full: "{{ zookeeper_image }}:{{ zookeeper_tag }}"
 zookeeper_dimensions: "{{ default_container_dimensions }}"
 
+zookeeper_enable_healthchecks: "{{ enable_container_healthchecks }}"
+zookeeper_healthcheck_interval: "{{ default_container_healthcheck_interval }}"
+zookeeper_healthcheck_retries: "{{ default_container_healthcheck_retries }}"
+zookeeper_healthcheck_start_period: "{{ default_container_healthcheck_start_period }}"
+zookeeper_healthcheck_test: ["CMD-SHELL", "healthcheck_listen java {{ zookeeper_client_port }}"]
+zookeeper_healthcheck_timeout: "{{ default_container_healthcheck_timeout }}"
+zookeeper_healthcheck:
+  interval: "{{ zookeeper_healthcheck_interval }}"
+  retries: "{{ zookeeper_healthcheck_retries }}"
+  start_period: "{{ zookeeper_healthcheck_start_period }}"
+  test: "{% if zookeeper_enable_healthchecks | bool %}{{ zookeeper_healthcheck_test }}{% else %}NONE{% endif %}"
+  timeout: "{{ zookeeper_healthcheck_timeout }}"
+
 zookeeper_default_volumes:
   - "{{ node_config_directory }}/zookeeper/:{{ container_config_directory }}/"
   - "/etc/localtime:/etc/localtime:ro"

ansible/roles/zookeeper/handlers/main.yml

@@ -12,5 +12,6 @@
     environment: "{{ service.environment }}"
     volumes: "{{ service.volumes }}"
     dimensions: "{{ service.dimensions }}"
+    healthcheck: "{{ service.healthcheck | default(omit) }}"
   when:
     - kolla_action != "config"

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

@@ -9,6 +9,7 @@
     volumes: "{{ item.value.volumes }}"
     environment: "{{ item.value.environment }}"
     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-zookeeper-7f02c4667a1bd051.yaml

+---
+features:
+  - |
+    Implements container healthchecks for zookeeper services.
+    See `blueprint
+    <https://blueprints.launchpad.net/kolla-ansible/+spec/container-health-check>`__