Add KeyDB (Redis clone) to configuration

Replaces Redis for PVC >= 0.9.81

roles/pvc/handlers/main.yml

@@ -21,6 +21,12 @@
     state: restarted
   ignore_errors: yes
 
+- name: restart keydb
+  service:
+    name: keydb-server
+    state: restarted
+  ignore_errors: yes
+
 # Restart services one-at-a-time
 # Ideally, this would be accomplished by a serial=1, but Ansible doesn't support that and
 # likely never will. Instead, we just run the service restart manually, waiting X seconds

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

roles/pvc/templates/keydb/keydb.conf.j2

@@ -0,0 +1,79 @@
+bind 0.0.0.0
+protected-mode no
+port 6379
+tcp-backlog 511
+timeout 0
+tcp-keepalive 300
+daemonize yes
+pidfile /var/run/keydb/keydb-server.pid
+loglevel notice
+logfile /var/log/keydb/keydb-server.log
+databases 16
+always-show-logo yes
+set-proc-title yes
+proc-title-template "{title} {listen-addr} {server-mode}"
+save 5 1
+stop-writes-on-bgsave-error yes
+rdbcompression yes
+rdbchecksum yes
+dbfilename dump.rdb
+rdb-del-sync-files no
+dir /var/lib/keydb
+replica-serve-stale-data yes
+replica-read-only yes
+repl-diskless-sync no
+repl-diskless-sync-delay 5
+repl-diskless-load disabled
+repl-disable-tcp-nodelay no
+replica-priority 100
+acllog-max-len 128
+lazyfree-lazy-eviction no
+lazyfree-lazy-expire no
+lazyfree-lazy-server-del no
+replica-lazy-flush no
+lazyfree-lazy-user-del no
+lazyfree-lazy-user-flush no
+oom-score-adj no
+oom-score-adj-values 0 200 800
+disable-thp yes
+appendonly no
+appendfilename "appendonly.aof"
+appendfsync everysec
+no-appendfsync-on-rewrite no
+auto-aof-rewrite-percentage 100
+auto-aof-rewrite-min-size 64mb
+aof-load-truncated yes
+aof-use-rdb-preamble yes
+lua-time-limit 5000
+slowlog-log-slower-than 10000
+slowlog-max-len 128
+latency-monitor-threshold 0
+notify-keyspace-events ""
+hash-max-ziplist-entries 512
+hash-max-ziplist-value 64
+list-max-ziplist-size -2
+list-compress-depth 0
+set-max-intset-entries 512
+zset-max-ziplist-entries 128
+zset-max-ziplist-value 64
+hll-sparse-max-bytes 3000
+stream-node-max-bytes 4096
+stream-node-max-entries 100
+activerehashing yes
+client-output-buffer-limit normal 0 0 0
+client-output-buffer-limit replica 256mb 64mb 60
+client-output-buffer-limit pubsub 32mb 8mb 60
+hz 10
+dynamic-hz yes
+aof-rewrite-incremental-fsync yes
+rdb-save-incremental-fsync yes
+jemalloc-bg-thread yes
+server-threads 2
+replica-weighting-factor 2
+
+# Enable multi-master replication
+multi-master yes
+active-replica yes
+{% for node in pvc_nodes if node.is_coordinator and node.hostname != ansible_hostname %}
+replicaof {{ node.cluster_ip }} 6379
+{% endfor %}