Add KeyDB (Redis clone) to configuration

Replaces Redis for PVC >= 0.9.81

roles/pvc/tasks/keydb/main.yml

@@ -0,0 +1,39 @@
+---
+- name: remove redis packages via apt
+  apt:
+    name:
+      - redis
+      - redis-server
+      - redis-tools
+    state: absent
+    purge: yes
+
+- name: install keydb packages via apt
+  apt:
+    name:
+      - keydb
+    state: latest
+    update-cache: yes
+  register: apt_res
+  retries: 5
+  until: apt_res is success
+
+- name: install keydb configuration file
+  template:
+    src: keydb/keydb.conf.j2
+    dest: /etc/keydb/keydb.conf
+    owner: keydb
+    group: keydb
+    mode: 0640
+  notify: restart keydb
+
+- name: start but disable services (managed by PVC)
+  service:
+    name: "{{ item }}"
+    state: started
+    enabled: no
+  ignore_errors: yes
+  with_items:
+    - keydb-server
+
+- meta: flush_handlers

roles/pvc/tasks/main.yml

@@ -45,6 +45,10 @@
   tags: pvc-patroni
   when: is_coordinator
 
+- include: keydb/main.yml
+  tags: pvc-keydb
+  when: is_coordinator
+
 # Install core services
 - include: libvirt/main.yml
   tags: pvc-libvirt