https://github.com/cirocosta/docker-ubuntu

Ubuntu-based docker image with base minimum systemd and SSH
https://github.com/cirocosta/docker-ubuntu

docker linux systemd ubuntu

Last synced: 2 months ago
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Ubuntu-based docker image with base minimum systemd and SSH

• Host: GitHub
• URL: https://github.com/cirocosta/docker-ubuntu
• Owner: cirocosta
• Created: 2017-11-12T12:47:19.000Z (over 8 years ago)
• Default Branch: master
• Last Pushed: 2017-11-22T12:19:58.000Z (over 8 years ago)
• Last Synced: 2025-02-10T11:51:15.091Z (over 1 year ago)
• Topics: docker, linux, systemd, ubuntu
• Language: Shell
• Size: 9.77 KB
• Stars: 3
• Watchers: 2
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.txt

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README

          
docker-ubuntu - a mini-ubuntu that has systemd with SSH configured.

Why?

  The official `library/ubuntu` image does not contain SSHD running

  by default as well as systemd. Thus, this images replicates a little 

  better the environment of an ubuntu machine. The tradeoff is that

  it requires more privileges and volume mounting the cgroup virtual

  filesystem.

Usage:

  1.  Default password

    

      The easiest way to get `cirocosta/ubuntu` running is using

      the default password for the `ubuntu` or `root` user.

          docker run \

            --privileged \

            --security-opt seccomp=unconfined \

            --tmpfs /run \

            --tmpfs /run/lock \

            --volume /sys/fs/cgroup:/sys/fs/cgroup:ro \

            --detach \

            --publish 2222:22 \

            cirocosta/ubuntu

          

          ssh root@localhost -p 2222

          Password: root

          ssh ubuntu@localhost -p 2222

          Password: ubuntu

  2.  Public and Private keys

    

      As the image represents a mini version of ubuntu and runs

      a normal sshd process you can mount your public key into

      /root/.ssh/authorized_keys and use your own private key.

          ssh-keygen -t rsa -b 4096 -C "test@test.com" -f ./key.rsa -P ""

            Generating public/private rsa key pair.

            Your identification has been saved in ./key.rsa.

            Your public key has been saved in ./key.rsa.pub.

            ...

          tree ./ 

            .

            ├── key.rsa

            └── key.rsa.pub

          chmod 400 ./key.rsa

          docker run \

            --privileged \

            --security-opt seccomp=unconfined \

            --tmpfs /run \

            --tmpfs /run/lock \

            --volume /sys/fs/cgroup:/sys/fs/cgroup:ro \

            --volume `pwd`/mykeys/key.rsa.pub:/root/.ssh/authorized_keys:ro \

            --detach \

            --publish 2222:22 \

            cirocosta/ubuntu

          

          ssh -i ./key.rsa root@localhost -p 2222

          ps.:  when you volume mount the file `key.rsa.pub` you might 

                have problems due to permissions (you'll mount the file

                having the permissions from the user that created the 

                file). Make sure you adjust the permissions or, if you're

                mounting for root, that you create the key file as root.