CODEWITHSUNDEEP
dockerdocker-compose
Malachi Bazar
Malachi Bazar

Reputation: 1823

Docker-compose check latest version of an image

Is there a way to check if docker-compose is running the latest version of an image? I know that I can run docker-compose pull to get the latest version, but what happens if I run the pull command and docker-compose already has the newest image? Does the pull request count against my Docker Hub pull request limit?

My end goal is to check for a new image every 24 hours without using Watchtower.

Upvotes: 1

Views: 1846

Answers (1)

Faeeria
Faeeria

Reputation: 826

When you do a docker pull against the ":latest" tag of an image, docker will only pull that image if this version of the image is not on your local repository/computer. Works lit git pull, basically. Docker-compose does a simple, classic docker pull, so same mechanic.

You can find a way to find your docker pull limit rate, and your number of remaining pulls in at this link

You can try consulting your remaining pulls, then lauching docker pull <some image>:latest, consulting your remaining pulls again (it'll show the same -1) and doing the same pull again. Pull checks the image version, does not detect changes, does not pull, your remaining pulls number stay the same.

Anyway, you get 100 pulls/6 hours if you are an anonymous user and 200 pulls/6 hours if you are an authentified user. For your use case, you would be okay even if you were pulling the image every day.

Upvotes: 1

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