feat(kv-db): add default config for redis-like DBs

The leaks in short-running pods result in idle connections
to Redict/Valkey, all of these KV-databases have ‹timeout› option in
their config that allows for iterative cleanup of hanging connections.

This mitigates the issue to the point of still having free connections
slots to Redict/Valkey, i.e., the pods shall be killed, but handlers do
not end up in a retry-loop trying to connect to Redict/Valkey.

Since the config is 1:1 between all Redis, Redict, and Valkey, create
one ConfigMap, map the config into the databases and pass the path
to the config as an argument.

Tested with Redict and Valkey. »NOT« tested with Redis.

Related to packit/packit-service#2522

Signed-off-by: Matej Focko <[email protected]>

openshift/configmap-redis_like_config.yml

@@ -0,0 +1,8 @@
+---
+kind: ConfigMap
+apiVersion: v1
+metadata:
+  name: redis-like-config
+data:
+  redis.conf: |
+    timeout 1800

openshift/redict.yml.j2

@@ -21,11 +21,15 @@ spec:
       containers:
         - name: redict
           image: registry.redict.io/redict:7
+          args:
+            - "/etc/redislike/redis.conf"
           ports:
             - containerPort: 6379
           volumeMounts:
             - mountPath: /data
               name: redict-pv
+            - mountPath: /etc/redislike
+              name: redis-like-config
           resources:
             # requests and limits have to be the same to have Guaranteed QoS
             requests:
@@ -38,6 +42,8 @@ spec:
         - name: redict-pv
           persistentVolumeClaim:
             claimName: redict-pvc
+        - name: redis-like-config
+          configMap: {name: redis-like-config}
   replicas: 1
   strategy:
     type: Recreate

openshift/valkey.yml.j2

@@ -21,11 +21,15 @@ spec:
       containers:
         - name: valkey
           image: valkey/valkey:8.0.0
+          args:
+            - "/etc/redislike/redis.conf"
           ports:
             - containerPort: 6379
           volumeMounts:
             - mountPath: /data
               name: valkey-pv
+            - mountPath: /etc/redislike
+              name: redis-like-config
           resources:
             # requests and limits have to be the same to have Guaranteed QoS
             requests:
@@ -38,6 +42,8 @@ spec:
         - name: valkey-pv
           persistentVolumeClaim:
             claimName: valkey-pvc
+        - name: redis-like-config
+          configMap: {name: redis-like-config}
   replicas: 1
   strategy:
     type: Recreate

playbooks/deploy.yml

@@ -186,6 +186,7 @@
     - name: Deploy key-value database ({{ kv_database }})
       ansible.builtin.include_tasks: tasks/k8s.yml
       loop:
+        - "{{ lookup('file', '{{ project_dir }}/openshift/configmap-redis_like_config.yml') }}"
         - "{{ lookup('template', '{{ project_dir }}/openshift/{{ kv_database }}.yml.j2') }}"
       when: with_kv_database
       tags:

playbooks/roles/deploy/tasks/main.yml

@@ -144,6 +144,7 @@
 - name: Deploy key-value database ({{ kv_database }})
   ansible.builtin.include_tasks: tasks/k8s.yml
   loop:
+    - "{{ lookup('file', '{{ project_dir }}/openshift/configmap-redis_like_config.yml') }}"
     - "{{ lookup('template', '{{ project_dir }}/openshift/{{ kv_database }}.yml.j2') }}"
   when: with_kv_database
   tags: