Use Docker healthchecks for kafka services

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

Change-Id: I31c978be7f8687de1e41b168712aceed28c67a8a

ansible/roles/kafka/defaults/main.yml

@@ -12,6 +12,8 @@ kafka_services:
       KAFKA_HEAP_OPTS: "{{ kafka_heap_opts }}"
     volumes: "{{ kafka_default_volumes + kafka_extra_volumes }}"
     dimensions: "{{ kafka_dimensions }}"
+    healthcheck: "{{ kafka_healthcheck }}"
+
 
 ####################
 # Kafka
@@ -30,6 +32,19 @@ kafka_tag: "{{ openstack_tag }}"
 kafka_image_full: "{{ kafka_image }}:{{ kafka_tag }}"
 kafka_dimensions: "{{ default_container_dimensions }}"
 
+kafka_enable_healthchecks: "{{ enable_container_healthchecks }}"
+kafka_healthcheck_interval: "{{ default_container_healthcheck_interval }}"
+kafka_healthcheck_retries: "{{ default_container_healthcheck_retries }}"
+kafka_healthcheck_start_period: "{{ default_container_healthcheck_start_period }}"
+kafka_healthcheck_test: ["CMD-SHELL", "healthcheck_listen java {{ kafka_port }}"]
+kafka_healthcheck_timeout: "{{ default_container_healthcheck_timeout }}"
+kafka_healthcheck:
+  interval: "{{ kafka_healthcheck_interval }}"
+  retries: "{{ kafka_healthcheck_retries }}"
+  start_period: "{{ kafka_healthcheck_start_period }}"
+  test: "{% if kafka_enable_healthchecks | bool %}{{ kafka_healthcheck_test }}{% else %}NONE{% endif %}"
+  timeout: "{{ kafka_healthcheck_timeout }}"
+
 kafka_default_volumes:
   - "{{ node_config_directory }}/kafka/:{{ container_config_directory }}/"
   - "/etc/localtime:/etc/localtime:ro"

ansible/roles/kafka/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/kafka/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-kafka-5358d90e8b93bda3.yaml

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