Use Docker healthchecks for kuryr services

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

Change-Id: Ia4401f97140e2c2acc37d5ee3aaf90544747c547

ansible/roles/kuryr/defaults/main.yml

@@ -19,6 +19,7 @@ kuryr_services:
       - NET_ADMIN
     volumes: "{{ kuryr_default_volumes + kuryr_extra_volumes }}"
     dimensions: "{{ kuryr_dimensions }}"
+    healthcheck: "{{ kuryr_healthcheck }}"
 
 
 ####################
@@ -29,6 +30,19 @@ kuryr_image: "{{ docker_registry ~ '/' if docker_registry else '' }}{{ docker_na
 kuryr_tag: "{{ openstack_tag }}"
 kuryr_image_full: "{{ kuryr_image }}:{{ kuryr_tag }}"
 
+kuryr_enable_healthchecks: "{{ enable_container_healthchecks }}"
+kuryr_healthcheck_interval: "{{ default_container_healthcheck_interval }}"
+kuryr_healthcheck_retries: "{{ default_container_healthcheck_retries }}"
+kuryr_healthcheck_start_period: "{{ default_container_healthcheck_start_period }}"
+kuryr_healthcheck_test: ["CMD-SHELL", "healthcheck_listen kuryr-server {{ kuryr_port }}"]
+kuryr_healthcheck_timeout: "{{ default_container_healthcheck_timeout }}"
+kuryr_healthcheck:
+  interval: "{{ kuryr_healthcheck_interval }}"
+  retries: "{{ kuryr_healthcheck_retries }}"
+  start_period: "{{ kuryr_healthcheck_start_period }}"
+  test: "{% if kuryr_enable_healthchecks | bool %}{{ kuryr_healthcheck_test }}{% else %}NONE{% endif %}"
+  timeout: "{{ kuryr_healthcheck_timeout }}"
+
 kuryr_default_volumes:
   - "{{ node_config_directory }}/kuryr/:{{ container_config_directory }}/:ro"
   - "/etc/localtime:/etc/localtime:ro"

ansible/roles/kuryr/handlers/main.yml

@@ -13,5 +13,6 @@
     cap_add: "{{ service.cap_add }}"
     volumes: "{{ service.volumes }}"
     dimensions: "{{ service.dimensions }}"
+    healthcheck: "{{ service.healthcheck | default(omit) }}"
   when:
     - kolla_action != "config"

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

@@ -10,6 +10,7 @@
     cap_add: "{{ item.value.cap_add }}"
     volumes: "{{ item.value.volumes }}"
     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-kuryr-9cc3d0480e9fe505.yaml

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