Question 83015 in Docker Question posted in
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Docker compose breaks ssh connection

I am trying to run a few docker containers on GCP VMs. As of today, when I run a docker-compose, my ssh connection breaks. This was not happening as of this morning. The only thing that changed was I did a sudo apt update && sudo apt upgrade.

An example of a docker-compose file that breaks the connection:

version: '3'
services:
  mongo:
    container_name: mongo
    image: mongo
    expose:
      - "27017"
    ports:
      - "27017:27017"

I’m on Ubuntu 5.13.0-1030-gcp #36~20.04.1-Ubuntu SMP Fri Jun 3 15:33:42 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux.

docker-compose version 1.25.0

Docker version 20.10.17, build 100c701

and I’m using BuildKit for my Docker and docker-compose builds.

I’m not sure how to debug this issue, any suggestions would be appreciated. Will update the post with more info if needed.

Tags:

3

Answers


  1. 0

    Do not update your kernel,new kernel will influence docker process

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  2. 0

    Check your dmesg to see if the kernel crashed.
    Probably related to https://www.mail-archive.com/[email protected]/msg482001.html

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  3. 0

    in our case it was an internal ip address space exhaustion
    because docker switches afterwards to the 192.168.. network

    and blocks external traffic

    to fix – shutdown all docker containers
    purge all docker networks
    add or append to docker daemon.json

    e.g. vi /etc/docker/daemon.json for 512 networks

    {
    "default-address-pools":[
        {"base":"172.20.0.0/16","size":24},
        {"base":"172.21.0.0/16","size":24}
    ]
}
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