[{"id":"cG9zdDo4NQ==","slug":"reduce-docker-compose-files-with-yaml-magic","title":"Reduce docker-compose files with YAML magic","content":"\n

If you find yourself writing long docker-compose files because you need to specify the same things over and over again inside of the single services: fear no more!

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\"\" — Photo by Guillaume Bolduc on Unsplash

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Without further ado:

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version: '3.4' # min version 3.4\n\nx-default: &default\n  restart: always\n  env_file: .env\n\n\nservices:\n\n  web:\n    <<: *default\n    image: node\n    # blablabla\n\n  db:\n    <<: *default\n    image: postgres

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Thats it! Now both web and db inherit the properties of x-default.

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The x- prefix is a docker specific thing and is required. YAML support references also without the prefix. Also note that version 3.4 or higher is required.

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btw: I recently was looking into Sentry and found this docker-compose file. Thats how I discovered it.

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