add cronjob

.drone.yml

@@ -17,6 +17,8 @@ steps:
       DOMAIN: {{ .Name }}.swarm-test.autonomic.zone
       STACK_NAME: {{ .Name }}
       LETS_ENCRYPT_ENV: production
+      CRON_ENTRYPOINT_VERSION: v1
+      PRETIX_CONFIG_VERSION: v1
 trigger:
   branch:
     - main

abra.sh

@@ -1 +1,2 @@
 export PRETIX_CONFIG_VERSION=v1
+export CRON_ENTRYPOINT_VERSION=v1

compose.yml

@@ -68,6 +68,19 @@ services:
     networks:
       - internal
 
+  cron:
+    image: alpinelinux/docker-cli:latest
+    environment:
+      - STACK_NAME=${STACK_NAME}
+    volumes:
+      - /var/run/docker.sock:/var/run/docker.sock
+    entrypoint:
+      /entrypoint.sh
+    configs:
+      - source: cron_entrypoint
+        target: /entrypoint.sh
+        mode: 0555
+
 volumes:
   app:
   postgres:
@@ -78,6 +91,9 @@ configs:
     name: ${STACK_NAME}_pretix_config_${PRETIX_CONFIG_VERSION}
     file: pretix.cfg.tmpl
     template_driver: golang
+  cron_entrypoint:
+    name: ${STACK_NAME}_cron_entrypoint_${CRON_ENTRYPOINT_VERSION}
+    file: entrypoint.cron.sh
 
 networks:
   proxy:

entrypoint.cron.sh

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+echo '15,45 * * * * docker exec $(docker ps -qf 'name=${STACK_NAME}_app') pretix runperiodic' | crontab - && crond -f -d 8