Containerize clustercheck galera monitor for HA deployments

In HA overcloud deployments, HAProxy makes use of a helper service called
"clustercheck", to check whether galera nodes are available for serving
traffic.

This change implements a dedicated service for clustercheck, which was
originally part of the pacemaker mysql service.  The service is
configured by tripleo and the container's lifecycle is managed by docker,
like other containerized services.

Closes-Bug: #1692969
Change-Id: I8a5b30429f8ec3e484256a62a29ab7dee33ab291
Co-Authored-By: Michele Baldessari <michele@acksyn.org>
Depends-on: I1aabe34fa6a9c8c705a4405f275b66502c313cf2

1 files changed, 103 insertions, 0 deletions

diff --git a/docker/services/pacemaker/clustercheck.yaml b/docker/services/pacemaker/clustercheck.yaml
new file mode 100644
index 00000000..bad2acf6
--- /dev/null
+++ b/docker/services/pacemaker/clustercheck.yaml
@@ -0,0 +1,103 @@
+heat_template_version: pike
+
+description: >
+  MySQL HA clustercheck service deployment using puppet
+  This service is used by HAProxy in a HA scenario to report whether
+  the local galera node is synced
+
+parameters:
+  DockerNamespace:
+    description: namespace
+    default: 'tripleoupstream'
+    type: string
+  DockerClustercheckImage:
+    description: image
+    default: 'centos-binary-mariadb:latest'
+    type: string
+  EndpointMap:
+    default: {}
+    description: Mapping of service endpoint -> protocol. Typically set
+                 via parameter_defaults in the resource registry.
+    type: json
+  ServiceNetMap:
+    default: {}
+    description: Mapping of service_name -> network name. Typically set
+                 via parameter_defaults in the resource registry.  This
+                 mapping overrides those in ServiceNetMapDefaults.
+    type: json
+  DefaultPasswords:
+    default: {}
+    type: json
+  RoleName:
+    default: ''
+    description: Role name on which the service is applied
+    type: string
+  RoleParameters:
+    default: {}
+    description: Parameters specific to the role
+    type: json
+
+resources:
+
+  ContainersCommon:
+    type: ../containers-common.yaml
+
+  MysqlPuppetBase:
+    type: ../../../puppet/services/pacemaker/database/mysql.yaml
+    properties:
+      EndpointMap: {get_param: EndpointMap}
+      ServiceNetMap: {get_param: ServiceNetMap}
+      DefaultPasswords: {get_param: DefaultPasswords}
+      RoleName: {get_param: RoleName}
+      RoleParameters: {get_param: RoleParameters}
+
+outputs:
+  role_data:
+    description: Containerized service clustercheck using composable services.
+    value:
+      service_name: clustercheck
+      config_settings: {get_attr: [MysqlPuppetBase, role_data, config_settings]}
+      step_config: "include ::tripleo::profile::pacemaker::clustercheck"
+      # BEGIN DOCKER SETTINGS #
+      puppet_config:
+        config_volume: clustercheck
+        puppet_tags: file # set this even though file is the default
+        step_config: "include ::tripleo::profile::pacemaker::clustercheck"
+        config_image: &clustercheck_image
+          list_join:
+            - '/'
+            - [ {get_param: DockerNamespace}, {get_param: DockerClustercheckImage} ]
+      kolla_config:
+        /var/lib/kolla/config_files/clustercheck.json:
+          command: /usr/sbin/xinetd -dontfork
+          config_files:
+          - dest: /etc/xinetd.conf
+            source: /var/lib/kolla/config_files/src/etc/xinetd.conf
+            owner: mysql
+            perm: '0644'
+          - dest: /etc/xinetd.d/galera-monitor
+            source: /var/lib/kolla/config_files/src/etc/xinetd.d/galera-monitor
+            owner: mysql
+            perm: '0644'
+          - dest: /etc/sysconfig/clustercheck
+            source: /var/lib/kolla/config_files/src/etc/sysconfig/clustercheck
+            owner: mysql
+            perm: '0600'
+      docker_config:
+        step_2:
+          clustercheck:
+            start_order: 1
+            image: *clustercheck_image
+            restart: always
+            net: host
+            volumes:
+              list_concat:
+                - {get_attr: [ContainersCommon, volumes]}
+                -
+                  - /var/lib/kolla/config_files/clustercheck.json:/var/lib/kolla/config_files/config.json
+                  - /var/lib/config-data/clustercheck/:/var/lib/kolla/config_files/src:ro
+                  - /var/lib/mysql:/var/lib/mysql
+            environment:
+              - KOLLA_CONFIG_STRATEGY=COPY_ALWAYS
+      host_prep_tasks:
+      upgrade_tasks: