How to restart an individual azure container

Reuben Cummings 50

az container restart restarts "all containers in a container group". Since this can cause downtime, how do I only restart an individual container instance? I currently use the Python SDK in an Azure Function to run ContainerInstanceManagementClient.container_groups.begin_restart.

2 answers

Dan Rios 1,580 Reputation points MVP

2024-06-17T15:02:18.0333333+00:00

Hi there,

You can't restart a specific container in a container group, unfortunately: https://learn.microsoft.com/en-us/azure/container-instances/container-instances-update?#limitations

All containers in a container group are restarted when you update the container group. You can't perform an update or in-place restart of a specific container in a multi-container group.

You may want to explore an alternative service like Azure Container Apps which can use a revision to bring up with no downtime to the service.
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Reuben Cummings 50 Reputation points

2024-06-17T15:07:48.99+00:00

I see. Is there a way to send a signal to an ACI then? E.g.,

docker exec <prometheus_container_name> sudo killall -HUP prometheus

Dan Rios 1,580 Reputation points MVP

2024-06-17T18:52:07.64+00:00

Maybe via (example) az container exec -g MyResourceGroup --name mynginx --container-name nginx --exec-command "something"

You can read more here:

https://learn.microsoft.com/en-us/cli/azure/container?view=azure-cli-latest#az-container-exec

Mark the answer as accepted so others who stumble across this limitation can see the correct answer. Thanks!

Reuben Cummings 50 Reputation points

2024-06-17T19:09:27.5433333+00:00

Thanks, I'm using a python azure function and will try this...

from azure.mgmt.containerinstance import ContainerInstanceManagementClient client = ContainerInstanceManagementClient("credential", "subscription_id") response = client.containers.execute_command( "resource_group", "container_group", container_name="container_name", container_exec_request={"command": "command"}, )
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Reuben Cummings 50 Reputation points

2024-06-18T14:52:06.8133333+00:00

Thanks Dan. The work-a-round I plan to going with is using az container exec. I haven't tried it yet, but I'm hoping the arguments issue has been solved.
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Dan Rios 1,580 Reputation points MVP

2024-06-19T06:45:55.9233333+00:00

Good to hear. If you’re able to mark my original answer as accepted, that would be great!
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How to restart an individual azure container

2 answers