run docker exec from swarm manager

2020-04-07 09:59发布

I have two worker nodes: worker1 and worker2 and one swarm manager. I'm running all the services in the worker nodes only. I need to run from the manager docker exec to access some of the containers created in the worker nodes but I keep getting that the service is not recognized. I know I can run docker exec in any of the worker nodes and it works fine but I dont want to have to find on which node the service is running and then ssh to the designated node to run docker exec command. Is there a way to do so in swarm or not?

标签： docker docker-swarm

2条回答

别忘想泡老子

2楼-- · 2020-04-07 10:29

If this helps, nowadays you can create the overlay network with --attachable flag to enable any container to join the network. This is great feature as it allows a lot of flexibility.

E.g.

$ docker network create --attachable --driver overlay my-network
$ docker service create --network my-network --name web --publish 80:80 nginx
$ docker run --network=my-network -ti alpine sh
$ wget -qO- web

<!DOCTYPE html>
<html>
<head>
....

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萌系小妹纸

3楼-- · 2020-04-07 10:44

Swarm mode does not currently have a way to run an exec on a running task. You need to find the container and run the exec on the host. You can configure the workers to have a TLS protected port they listen on, which would give you remote access (see docker's guide). And you can lookup the node for each task in a service by checking the output of a docker service ps $service_name.

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run docker exec from swarm manager

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