Slow worker restart

docker/cron-docker/periodic/daily/restart_slow_worker_cron

@@ -0,0 +1,19 @@
+#!/bin/sh
+set -e
+
+cd /opt/Internet.nl
+
+SERVICE=worker-slow
+REPLICAS=$WORKER_SLOW_REPLICAS
+COMPOSE_CMD="docker compose --env-file=docker/defaults.env --env-file=docker/host.env --env-file=docker/local.env"
+
+OLD_CONTAINERS=$($COMPOSE_CMD ps --format "{{ .Name }}"|grep "$SERVICE")
+
+# bring up new containers, wait until healthy
+$COMPOSE_CMD up --no-deps --wait --scale=$(($REPLICAS*2)) up "$SERVICE"
+
+# graceful shutdown and remove old containers
+docker rm --force "$OLD_CONTAINERS"
+
+# restore replica number to original
+$COMPOSE_CMD scale $SERVICE=$REPLICAS

docker/docker-compose.yml

@@ -728,9 +728,13 @@ services:
   # cron daemon with access to Docker socket but no networking
   cron-docker:
     image: ${DOCKER_IMAGE_UTIL:-${DOCKER_REGISTRY:-ghcr.io/internetstandards}/util:${RELEASE}}
+    build:
+      context: ..
+      dockerfile: docker/util.Dockerfile
     command: crond -f -d7 -c /etc/crontabs-docker
     environment:
       - AUTO_UPDATE_TO
+      - WORKER_SLOW_REPLICAS
 
     restart: unless-stopped
     logging: