Getting started with ContainerSSH development
Welcome to developing ContainerSSH! For the purposes of this guide we will assume you have your development environment set up and ready to go. If not, please follow our handy guide to do just that.
Cloning the repository¶
Before we begin you will have to decide what you want to do. If you just want to get ContainerSSH running to get the big picture you will need to clone the ContainerSSH/ContainerSSH repository. This contains the main ContainerSSH executable, as well as the Auth-Config server used for testing:
git clone https://github.com/containerssh/containerssh
However, ContainerSSH is built in a highly modular fashion so you may need to change a specific library. You can find the list of libraries on our development dashboard. This dashboard contains an overview of all repositories, issues, pull requests, and everything else you will need to find your way around the codebase.
Each repository contains a readme explaining how to use that specific component. If you find the readme not helpful please open an issue on that repository asking for more information.
If you find yourself needing a new repository because you want to develop something completely new please file a pull request against the github-terraform repository.
For the best results we recommend cloning the ContainerSSH repos into
Running ContainerSSH is simple. You will need a clone of the main ContainerSSH repository. Then you have to run two commands.
First, the auth-config server needs to be run from the
go run .
When that's running create the
cmd/containerssh/config.yaml file with the following content:
--- log: level: debug ssh: hostkeys: - ssh_host_rsa_key backend: dockerrun auth: url: "http://127.0.0.1:8080" pubkey: false configserver: url: "http://127.0.0.1:8080/config"
Now copy the
ssh_host_rsa_key file from the
example folder and then run ContainerSSH from the
go run . --config config.yaml
That's it! Now you have a running ContainerSSH you can connect to on port 2222:
ssh foo@localhost -p 2222
Running the tests¶
There are two types of tests for ContainerSSH: end to end tests and component-level tests. Both can be run using the following command from each library's main folder:
go test ./...
Some tests require a working Docker or Kubernetes backend. Make sure that your Docker socket is running on your platform default and your Kubernetes configuration is available in the
.kube/config file in your home directory as the tests will use these to connect to.
Submitting a pull requests¶
Once you are done with your development you should fork the repository on GitHub and create a pull request. This pull request will automatically be tested by the CI system. Feel free to keep working on your PR until you are happy with it.
ContainerSSH is a reasonably complex piece of software. It uses the built-in Go SSH library to create a server and the client libraries for Docker and Kubernetes to forward the data from the SSH channel to the standard input and output of the container.
We have dedicated a whole section to understanding how SSH and ContainerSSH in particular work.