DevOps/Docker/docker compose/Docker compose file: docker-compose.yml

Review different versions of docker-compose.yml

• Options: https://docs.docker.com/compose/compose-file/compose-versioning/#versioning

YAML Explained

Version and at least one service is needed.

version: "3.7"
services:
  ...
volumes:
  ...
networks:
  ...

Version 3

• DevOps/Docker/docker compose/Version 3 resource limitation

Removed options: volume_driver, volumes_from, cpu_shares, cpu_quota, cpuset, mem_limit, memswap_limit, extends, group_add

v3.7 (18.06.0+)

• init in service definitions
• rollback_config in deploy configurations
• Support for extension fields at the root of service, network, volume, secret and config definitions

v3.6 (8.02.0+)

• tmpfs size for tmpfs-type mounts

v3.5

• isolation in service definitions
• name for networks, secrets and configs
• shm_size in build configurations

Restart policy

• Version 3: https://docs.docker.com/compose/compose-file/#restart_policy

restart_policy:
        condition: on-failure
        delay: 5s
        max_attempts: 3
        window: 120s

• Version 2:

- restart: no|always|on-failure</code><ref>https://docs.docker.com/compose/compose-file/compose-file-v2/</ref>

logging

• https://docs.docker.com/compose/compose-file/#logging

driver: none|local|json-file|syslog|journald|gelf|fluentd|awslogs|splunk|etwlogs|gcplogs|logentries

json-file is the default option

See also: docker logs: docker logs --since 1h CONTAINER_NAME

See also

• DevOps/Docker/docker compose/Version 3 resouces