Working on remote Docker Host using docker context

SSH keys

In order to use remote Docker host, as a prerequisite you need SSH enabled (required login using SSH keys).

Generate or find your public SSH key

If the file does not exist, generate the SSH key-pair using following command

ssh-keygen -t rsa -b 4096

Setting up SSH keys to remote machine

Copying your public ssh key to machine

You can use password-based authentication to get into linux machine for the first time, and then use the following command:

echo your_public_ssh_key >> ~/.ssh/authorized_keys
ssh-copy-id -i ~/.ssh/id_rsa.pub root@agora

Adding permissions

chmod 700 ~/.ssh
chmod 600 ~/.ssh/authorized_keys

Docker Context setup

Set a docker context

with:

docker context create agora --docker host=ssh://root@agora

Switch to context:

docker context use agora

Enviroment var

DOCKER_HOST="ssh://root@agora

$ENV:DOCKER_HOST = 'ssh://root@192.168.1.200' (windows)