docker

Docs

• Command line interface https://docs.docker.com/engine/reference/commandline/cli/

Data volumes

• https://docs.docker.com/engine/userguide/dockervolumes/

Official packages

• https://hub.docker.com/_/httpd/

• https://hub.docker.com/_/nginx/

• https://hub.docker.com/_/elasticsearch/

• https://hub.docker.com/r/million12/varnish/

Selected Tuto

• https://www.digitalocean.com/community/tutorials/docker-explained-using-dockerfiles-to-automate-building-of-images
• Example docker file For httpd image https://github.com/docker-library/httpd/blob/master/2.4/Dockerfile
• https://coreos.com/os/docs/latest/getting-started-with-docker.html

How to

List active docker containers

docker ps -l

Output

CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS                                           NAMES
00bb4123c87d        nginx               "nginx -g 'daemon off"   57 minutes ago      Up 57 minutes       0.0.0.0:32769->80/tcp, 0.0.0.0:32768->443/tcp   mysite

Connect to an ubuntu image

docker run -t -i ubuntu /bin/bash

a container port to the machine port

docker run -d -p 80:80 coreos/apache /usr/sbin/apache2ctl -D FOREGROUND with -p 80:80 we map the docker port to the host machine port

List all docker images on the local machine

docker images

It give a display like this

REPOSITORY          TAG                 IMAGE ID            CREATED             VIRTUAL SIZE
<none>              <none>              4a8042f24167        5 minutes ago       223.8 MB
slucas/apache       latest              bd868a91e83b        26 minutes ago      223.8 MB
<none>              <none>              67b63fb2ba48        33 minutes ago      209.4 MB
myapache21          latest              3086f6c31b58        20 hours ago        193.5 MB
myapache2           latest              9eed1ba5f77f        20 hours ago        193.5 MB
ubuntu              latest              c4bea91afef3        40 hours ago        187.9 MB

Push a docker image to the docker hub

docker login
 docker push [userName]/[imageName]

Fix some commons mac installation docker problem

• https://docs.docker.com/engine/installation/mac/

List container open ports

• docker port 05d3b3c3c685 80/tcp -> 0.0.0.0:80

Run and build a docker image

First build the container

```docker build -t my-apache2 .````

• docker command
• build docker command
• -t option to give a name : my-apache2 -t, --tag= Repository name (and optionally a tag) for the image
• . read the content of a docker file in the current directory

Then run it

docker run --name=apache -i -t my-apache2

• docker command
• run docker command
• --name=apache option to set the name of the container (the running container,not the saved image)

docker run + the image name you would like to run + the command to run within the container

It's important to note that containers are designed to stop once the command executed within them has exited. For example, if you ran /bin/echo hello world as your command, the container will start, print hello world and then stop:

Docker files

• https://docs.docker.com/engine/articles/dockerfile_best-practices/#run

Image linking

• https://docs.docker.com/engine/userguide/networking/default_network/dockerlinks/