This repo will help you to schedule to restart containers at the same way as crontab, but inside the docker-compose file.
A distro Linux, docker, docker-compose, some knowledg about it and Crontab.
version: '3'
services:
service1:
image: "postgres"
restart: always
environment:
- POSTGRES_USER=postgres
- POSTGRES_PASSWORD=myStr0ngP4ssw0rd
labels:
crono: "* * * * *"
service2:
image: "postgres"
restart: always
environment:
- POSTGRES_USER=postgres
- POSTGRES_PASSWORD=myStr0ngP4ssw0rd
labels:
crono: "@hourly"
service3:
image: "postgres"
restart: always
environment:
- POSTGRES_USER=postgres
- POSTGRES_PASSWORD=myStr0ngP4ssw0rd
labels:
crono: "5 0 * 8 *"
service4:
image: "postgres"
restart: always
environment:
- POSTGRES_USER=postgres
- POSTGRES_PASSWORD=myStr0ngP4ssw0rd
labels:
crono: "50-59 * * * 1-5"See that inside each service I put a label called 'crono'. This will call to Crono that we want to restart it. The value of this will be the same like Crontab.
For help you, you can see crontab.guru at https://crontab.guru
You can infform some keys like @yearly, @annually, @monthly, @weekly, @daily or @hourly.
crono:
image: hudsonventura/crono:latest
restart: always
volumes:
- "./docker-compose.yml:/app/docker-compose.yml" # point you docker-compose file
- "/var/run/docker.sock:/var/run/docker.sock:ro"
environment:
- TIMEZONE=America/Sao_Paulo
- WAIT=3The first one volume, you have to link your docker-compose file. Crono will read this file to work.
The second one volume, will used from Crono to call Docker Api.
The first one environment, you can identify a timezone. In my tests the default timezone inside container was +0UTC, so I created this.
The second one environment is the time that Crono will wait until all containers be up.
You also can use the docker-compose params called links.
The volumes params are mandatories, but the environments are optional.
The complete example file is in the directory examples.
Change docker compose file to get local image:
crono:
image: crono #HERE
restart: always
volumes:
- "./docker-compose.yml:/app/docker-compose.yml"
- "/var/run/docker.sock:/var/run/docker.sock:ro"
environment:
- TIMEZONE=America/Sao_Paulo
- WAIT=3On example directory, run it to build:
sudo docker compose down && \
cd .. && \
sudo docker build -t crono -f ./app/Dockerfile_x64_x86/Dockerfile ./app/ && \
cd example/ && \
sudo docker compose up
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