CODEWITHSUNDEEP
docker
m9m9m
m9m9m

Reputation: 1721

What to do or how to handle if health_status of a docker container changes

I am running a docker container with health-cmd and I know it will turn to unhealthy when it stops working.

$ docker run 
 --name=some-container \
 --health-cmd='curl -sS http://127.0.0.1:5000 || exit 1' \
 --health-timeout=10s \
 --health-retries=3 \
 --health-interval=5s \
 --restart on-failure \
 container-image

I want to restart the container when it changes its health-status. How can do that? How to trigger the restart?

My Docker version 19.03.1, build 74b1e89

Upvotes: 2

Views: 2076

Answers (2)

LinPy
LinPy

Reputation: 18608

depends on your Dockerfile if the health check faild the container is exited with the code 1 becaus of your command :

--health-cmd='curl -sS http://127.0.0.1:5000 || exit 1'

therefore your restart policy on-failure will restart the container after ~35 seconds timeout + retries + interval when only the check failed.

the timeout + retries + interval values you can determind on many conditions there is no perfect values for them.

I think your command are good to go

Upvotes: 1

Duc Filan
Duc Filan

Reputation: 7157

You can use autoheal to restart unhealthy docker containers. Sample:

docker run -d \
    --name autoheal \
    --restart=always \
    -e AUTOHEAL_CONTAINER_LABEL=all \
    -v /var/run/docker.sock:/var/run/docker.sock \
    willfarrell/autoheal

Note: You must apply HEALTHCHECK to your docker images first. See https://docs.docker.com/engine/reference/builder/#healthcheck for details.

Upvotes: 0

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