Question 85507 in Docker Question posted in
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Docker Keepalived: check if a HAProxy (in another container) is healthy

I have two Docker containers:

1 for Keepalived
1 for Haproxy

The problem is that my track_script killall -0 haproxy (to check if haproxy is still alive) can’t reach the process of haproxy (because it is in another container..)

What should I do ?

Thanks!

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2

Answers


  1. Chosen as BEST ANSWER
    0

    Finally I mount bind the docker socket to run docker exec othercontainer killall -0 haproxy in my container.

    Not the best method but.. it works


  2. 0

    Nothing. If the main process in a container exits, the container will exit too; Docker does this automatically, and you shouldn’t (and for the most part can’t) check on an individual process in another container.

    You can use a restart policy to have Docker automatically restart a container, and its contained process, if it happens to exit:

    docker run -d --restart on-failure ... haproxy
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