Docker

How to create a tar file from local docker image and run it on local cluster

1. First check local images on you docker using command 'docker images'

2. Now make a tar file from the image using command 'docker save <imagename>:<image tag > -o <tar filename>'

3. FTP this tar file to local cluster

4. On cluster run command 'docker load -i <tar filename>'

5. Run 'docker images' on your cluster and verify image '<imagename>:<image' appears in list.

To get a bash shell in docker container

docker exec -it <docker id> /bin/bash

where -i interactive. t means tty

How to ssh into docker machine

docker-machine ssh

Commonly used docker commands

Create docker image (Dockerfile is present in current folder)

docker build .

Create docker image with tag (Dockerfile is present in current folder)

docker build -t myrepo/myimage:1.0 .

List docker images

docker images

List running docker containers

docker ps

List all docker containers, even which are not running

docker ps -a

Stop running docker container

docker stop <container id>

Start stopped docker container.

docker start <container id>

Remove docker image

docker rmi <image name>

Remove docker container

docker rm <container id>

Display information about a docker image

docker image inspect <image name>

Display information about a container

docker container inspect <container id>

Remove all unused docker images

docker image prune

Remove all unused docker containers

docker container prune