Basic docker commands

Intro

Basic docker commands page has been introduced to help docker newcomers to start working with docker with few basic commands.

Requirements

You know the Artifactory docker repository URL where your desired image currently is or will be located
Valid credentials with access to desired repository
Docker client installed on your testbed/workstation
There is many ways how to install docker client.
We recommend this on CentOS/Fedora:
sudo yum install docker -y
Or Ubuntu:
sudo apt install docker -y
Proper connectivity from your testbed/workstation to repository URL
Testbed access
- User has sudo/administrator access on testbed
- For using docker without "sudo" user must be member of "docker" group on testbed to be able to utilize docker properly without need to type sudo all the time:
```
sudo groupadd docker
sudo usermod -a -G docker $USER

# in edge case this can help:
#setfacl -m user:$USER:rw /var/run/docker.sock
```
  This is because docker daemon unix socket is owned by root user. However, docker daemon can be controlled members of docker group, so we are utilising this feature.

docker login <REPOSITORY_URL>

# Or with providing username to avoid asking username repeatedly
docker login -u <USER_NAME> <REPOSITORY_URL>

# Or with providing username and password to avoid asking credentials - do not use in shared environments as other users could be able to find your password in plaintext in command history
docker login -u <USER_NAME> -p <USER_PASSWORD> <REPOSITORY_URL>

Working with images

Pull image from official public docker repository

docker pull <IMAGE>:<TAG>

Pull image from specific repository

docker pull <REPOSITORY_KEY>.artifactory.shared.tds.CUSTOMERX.com/<IMAGE>:<TAG>

Tagging image with specific tag or version

docker tag <IMAGE>:<TAG> <REPOSITORY_KEY>.artifactory.shared.tds.CUSTOMERX.com/<IMAGE>:<TAG>

Push image to specific repository

docker push <REPOSITORY_KEY>.artifactory.shared.tds.CUSTOMERX.com/<IMAGE>:<TAG>

Images list

docker images

Image remove

docker rm <IMAGE_ID>

Working with containers

Containers list

docker container ls --all

Running container

docker run <REPOSITORY_KEY>.artifactory.shared.tds.CUSTOMERX.com/<IMAGE>:<TAG>

Other helpful commands

Clearing local docker data

This command removes all unused images, containers and other data from docker locally. For more info, refer to official documentation.

It is helpful for easy starting with the "clear table".

docker system prune -a -f

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