[Watchdog] Watch replication, if any (unsupported)

data/Dockerfiles/dovecot/repl_health.sh

@@ -0,0 +1,26 @@
+#!/bin/bash
+
+# Do not attempt to write to slave
+if [[ ! -z ${REDIS_SLAVEOF_IP} ]]; then
+  REDIS_CMDLINE="redis-cli -h ${REDIS_SLAVEOF_IP} -p ${REDIS_SLAVEOF_PORT}"
+else
+  REDIS_CMDLINE="redis-cli -h redis -p 6379"
+fi
+
+# Is replication active?
+# grep on file is less expensive than doveconf
+if ! grep -qi mail_replica /etc/dovecot/dovecot.conf; then
+  ${REDIS_CMDLINE} SET DOVECOT_REPL_HEALTH 1 > /dev/null
+  exit
+fi
+
+FAILED_SYNCS=$(doveadm replicator status | grep "Waiting 'failed' requests" | grep -oE '[0-9]+')
+
+# Set amount of failed jobs as DOVECOT_REPL_HEALTH
+# 1 failed job for mailcow.local is expected and healthy
+if [[ "${FAILED_SYNCS}" != 1 ]]; then
+  printf "Dovecot replicator has %d failed jobs\n" "${FAILED_SYNCS}"
+  ${REDIS_CMDLINE} SET DOVECOT_REPL_HEALTH "${FAILED_SYNCS}" > /dev/null
+else
+  ${REDIS_CMDLINE} SET DOVECOT_REPL_HEALTH 1 > /dev/null
+fi