Some of the useful docker commands

List Docker images in system

docker images 

sanjeewa@sanjeewa-ThinkPad-X1-Carbon-3rd:~/work/docker$ docker images 
REPOSITORY                                       TAG                 IMAGE ID            CREATED             SIZE
dockerhub.private.wso2.com/sanjeewa-testubuntu   latest              a71fcdc506aa        6 minutes ago       188 MB
sanjeewa-ubuntu                                  latest              a71fcdc506aa        6 minutes ago       188 MB
dockerhub.private.wso2.com/ubuntu                latest              b72889fa879c        11 weeks ago        188 MB

List running docker instances

docker ps

Get the differences between instances

docker diff 

Commit running instance after some changes to local repository

docker commit c951e2725fca9519c82d665fba4fc1439a8076a6ca1a266783e0578a7d76fb3f sanjeewa-ubuntu

Tag docker available in local repo.

docker tag sanjeewa-ubuntu dockerhub.private.wso2.com/sanjeewa-testubuntu

Export image to repo

>docker push dockerhub.private.wso2.com/sanjeewa-testubuntu

The push refers to a repository [dockerhub.private.wso2.com/sanjeewa-testubuntu]
863e132d4800: Pushed
5f70bf18a086: Pushed
f75f146a5022: Pushed
711b0bd2cb6a: Pushed
595d1d53a534: Pushed
latest: digest: sha256:5fbd869f1c9a169c8811b34dd30a7f5dfac4335ecb98e3f22c629c9e2bf4a83a size: 1358


Import image from file system

docker load < wso2am.tgz

docker images 

REPOSITORY                                       TAG                 IMAGE ID            CREATED             SIZE
dockerhub.private.wso2.com/sanjeewa-testubuntu   latest              a71fcdc506aa        18 minutes ago      188 MB
sanjeewa-ubuntu                                  latest              a71fcdc506aa        18 minutes ago      188 MB
dockerhub.private.wso2.com/wso2am                1.10.0              7ae5de86a076        3 weeks ago         1.032 GB
dockerhub.private.wso2.com/nginx                 latest              2fede7433e44        4 weeks ago         182.8 MB
dockerhub.private.wso2.com/svnrepo               latest              0530ac8e24b0        9 weeks ago         228.8 MB
dockerhub.private.wso2.com/ubuntu                latest              b72889fa879c        11 weeks ago        188 MB
dockerhub.private.wso2.com/mysql                 5.5                 783151ba5745        11 weeks ago        256.9 MB


Run docker instance

docker run -p 9443:9443 dockerhub.private.wso2.com/wso2am:1.10.0
Creating directory /mnt/172.17.0.2...

List running docker instances
docker ps
CONTAINER ID        IMAGE                                      COMMAND                  CREATED             STATUS              PORTS                                                             NAMES
9867acff0f65        dockerhub.private.wso2.com/wso2am:1.10.0   "/usr/local/bin/init."   2 minutes ago       Up 2 minutes        8243/tcp, 8280/tcp, 9763/tcp, 10397/tcp, 0.0.0.0:9443->9443/tcp   sad_kirch


Get logs from container

docker logs -f 9867acff0f65

Access remote machine terminal

docker exec -it 9867acff0f65 /bin/bash
root@9867acff0f65:/mnt# 

List all meta-data

docker inspect 3c78e0d8947a

To stop running instalce

docker stop 3c78e0d8947a

Write docker componse file. Edit docker file and add some commands

FROM dockerhub.private.wso2.com/ubuntu
MAINTAINER test
//run in remote machine
RUN apt-get update && apt-get install apache2 apache2-utils -y
//copy something from local to remote machine
COPY run_apache.sh /var/www/
RUN chmod 755 /var/www/run_apache.sh
EXPOSE 80
//This will execute only when run time happens.
CMD ["/var/www/run_apache.sh"]

Build docker from script file. here testapache is name and . means pick docker file from current location.

docker build -t testapache .

edit file

vim docker-compose.yml

up composed pattern

docker-compose up

Stop running deployment.

docker-compose down

Cleanup files.

docker rm -f $(docker ps -qa)