SSH directly into a docker container

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i've got some docker conatiners and now I want to access into one with ssh. Thats working I got a connection via ssh to the docker container.

But now I have the problem I don't know with which user I can access into this container?

I've tried it with both users I have on the host machine (web & root). But they don't work. What to do know?

You can drop directly into a running container with:

$ docker exec -it myContainer /bin/bash

You can get a shell on a container that is not running with:

$ docker run -it myContainer /bin/bash

This is the preferred method of getting a shell on a container. Running an SSH server is considered not a good practice and, although there are some use cases out there, should be avoided when possible.

How to SSH into a Running Docker Container and Run Commands, Most Docker containers running for long periods of time don't have active shell console. You'll likely connect to bash shell on demand, i.e when  If you want to connect directly into a Docker Container, without connecting to the docker host, your Dockerfile should include the following: # SSH login fix. Otherwise user is kicked off after login RUN echo 'root:pass' | chpasswd RUN mkdir /var/run/sshd RUN sed 's@session\s*required\s*pam_loginuid.so@session optional pam_loginuid.so@g' -i

If you want to connect directly into a Docker Container, without connecting to the docker host, your Dockerfile should include the following:

# SSH login fix. Otherwise user is kicked off after login
RUN echo 'root:pass' | chpasswd
RUN mkdir /var/run/sshd
RUN sed 's@session\s*required\s*pam_loginuid.so@session optional pam_loginuid.so@g' -i /etc/pam.d/sshd

EXPOSE 22
CMD ["/usr/sbin/sshd", "-D"]

Then use docker run with -p and -d flags. Example:

docker run -p 8022:22 -d your-docker-image

You can connect with:

ssh root@your-host -p8022

SSH directly into a docker container, We do not deploy an application directly into our servers. Instead, we use docker to unified server configuration. For each system on our server,  Docker Container is a process not a virtual machine so you do not need SSH to get into the container. Docker CLI provides commands like docker exec -it and docker container run -it Docker SSH into the Container.

Much more robust solution is pulling down nsenter to your sever, then sshing in and running docker-enter from there. That way you don't need to run multiple processes in the container (ssh server + whatever the container is for), or worry about all the extra overhead of ssh users and such (not to mention security concerns).

How to SSH into Docker Container in Linux, Build the image . The following Dockerfile sets up an SSHd service in a container that you can use to connect to and  I want to connect to a remote running Docker container directly with ssh. Normally I can $ ssh -i privateKey user@host $ docker ps #which will list all running containers $ docker exec -it ***** bash deploy.sh # ***** is container id and this line run a deployment script

The idea behind containers is that a container runs a single process so that it can be monitored by the daemon. If this process stops || fails for some reason, it can be restarted depending on your preference in your config. An ssh server is a running process. Therefore, if you need ssh access to your setup, make an ssh server service, which can share Volumes with other containers that are running alongside it in the setup.

To open a shell on a container in a host directly:

Imagine you are on your PC at home and you have a remote machine that runs docker and has running containers, and you want to open a shell on the container directly without "stopping by" on the remote host: (The -t flag exposes tty)

ssh -t user@remote.host 'docker exec -it running_container_name /bin/bash'

If you are already on the host, like the accepted answer: (The -i interactive -t tty)

docker exec -it running_container_name /bin/bash

Direct connection to a docker container with SSH, For example, to connect directly from a remote machine or when an application needs to run commands on your container. Most Docker images  Why SSH agent for docker container. For me as a new macOS user, for the first time, My idea was to copy my local ssh key pair into container´s .ssh directory (not secure huh!) and help from

Dockerize an SSH service, SSH is probably not the best way to run commands in a container; container infrastructure (such as oc, crictl, lxc, and docker) provide an This still does not open a shell in the container, but it does run commands directly. Using SSH keys inside docker container. docker container; Stack Overflow: Using ssh-agent with docker on macOS you can use docker cp to inject files into a

SSH into a Docker Container, How can i SSH into docker container? accessible from outside, you can directly ssh to the containers using the IP of the host (Remote Server)  SSH into a Docker Container. Just sometimes, it’s useful to SSH into a Docker Container. While docker exec or docker attach are usually sufficient to run commands in a container, sometimes you specifically need SSH. For example, to connect directly from a remote machine or when an application needs to run commands on your container.

How to SSH into a running container, To bash into a running container,you could use the following command: docker exec -it container_name /bin/bash. answered Aug 9, 2019 by  SSH into a Container How do I SSH into a running container. There is a docker exec command that can be used to connect to a container that is already running. Use docker ps to get the name of the existing container; Use the command docker exec -it <container name> /bin/bash to get a bash shell in the container

Comments
  • Do you really need ssh connection? You can just sudo docker exec -i -t container-name /bin/bash to access running container.
  • yes need to acces directly in a specific container
  • Ok, could you share the error message?
  • I've installed openssh-server in the container. set the root pw. And when I want to connect I got only access denied
  • Did you set the PermitRootLogin option in /etc/ssh/sshd_config to yes value?
  • I only need console for accessing with Jenkins in this container.
  • Is it possible to get more than one ssh session per container? Right now I can connect via ssh but only from one place. When I'm trying connect from another place at the same time I just get the following error - ssh_exchange_identification: read: Connection reset by peer
  • Thats more a security fail as direct ssh . because there are many other dockers in the Maschine. A simple SSH should Work .... Only the authentication is a Problem
  • The guy who created the nsenter docker image actually recommends using docker exec over nsenter. Since the introduction of docker exec, this is considered best practice. See also this question.