Docker Client Operations

External

• Docker Cheat Sheet: https://github.com/wsargent/docker-cheat-sheet

Internal

• Docker Concepts
• Docker Operations

Running the Client

On the Same Host as the Server

In order to connect to the docker server over the Unix socket, the user running the client must have permissions to do so:

[testuser@docker-server ~]$ ls -al /var/run/docker.sock
srw-rw----. 1 root docker 0 Apr 25 16:00 /var/run/docker.sock

One way to do that is to make the user a member of "docker" group:

usermod -G docker testuser

Commands

Info

System-wide info docker info

Queries

ps

Low-level information about a container: inspect

version

Look at container's logs logs

Changes introduced in the container's file system docker diff

Executions

exec

Other

import

load

update

Installation Verification

Docker Installation Verification

Recipes

• Start a Container Automatically
• Attach to a Running Container

Scenarios

Docker Client Scenarios

Image Operations

Docker Concepts - Images

Search for Images

Use "search" to look into Docker hub for publicly available images:

docker search <term>

A different repository can be specified as follows:

docker search registry.access.redhat.com/rhel7.4

List Images

List images in the local repository:

docker images

Remove an Image

Remove images from the local repository:

docker rmi

Pull an Image from Registry

Pull an image or a repository from a registry:

docker pull

• Build an image: docker build

Explore an Image

If the image has a shell, it can be run in interactive mode and explored:

 docker run -it <image-id|name> sh

Image History

docker history

Export the Filesystem

docker export

Container Lifecycle Operations

Create and Run a New Container

Create and run a new container:

docker run

Stop a Container

Stop a container:

docker stop

Start a Previously Stopped Container

Start a previously stopped container:

docker start

Remove a Container

Remove a container

docker rm