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

Lifecycle

Create and run a new container: run

Stop a container: stop

Start a previously stopped container: start

Remove a container: rm

Executions

exec

Other

build

import

load

update

Installation Verification

Docker Installation Verification

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

Recipes

• Start a Container Automatically
• Attach to a Running Container

Scenarios

Docker Client Scenarios

Image Operations

Docker Concepts - Images

List Images

List images in the local repository: images

Remove an Image

Remove images from the local repository: rmi

Pull an Image from Registry

Pull an image or a repository from a registry: pull