mailcow-dockerized/data/Dockerfiles/dovecot/repl_health.sh

#!/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