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2_Docker setup.txt
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sudo apt-get update
sudo apt-get install curl apt-transport-https ca-certificates software-properties-common
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"
sudo apt-get update
sudo apt-get install -y docker-ce
sudo systemctl status docker
--------------------------------------------------------
sudo docker run hello-world # before that login to docker
docker images
docker search ubuntu
---------------------------------------------------------------------
Docker Compose installation steps : https://www.digitalocean.com/community/tutorials/how-to-install-docker-compose-on-ubuntu-16-04
sudo curl -L https://github.com/docker/compose/releases/download/1.18.0/docker-compose-`uname -s`-`uname -m` -o /usr/local/bin/docker-compose
sudo chmod +x /usr/local/bin/docker-compose
docker-compose --version
Test
docker run hello-world # pulls the image from docker hub
or
mkdir hello-world
cd hello-world
vi docker-compose.yml
my-test:
image: hello-world
image: python
docker-compose up
docker pull ubuntu
docker history ubuntu
docker search ubuntu --limit 5
docker search --filter "stars=3“ <image_name>:<tag>
docker search --filter "is-official=true“ <image_name>:<tag>
docker search --filter "stars=30" ubuntu
docker search --filter "is-official=true" ubuntu
docker search ubuntu --filter "stars=50"
docker search ubuntu --filter "is-official=true"
docker images
docker pull ubuntu:19.04
docker pull ubuntu
docker save ubuntu -o ubuntu.tar
docker rmi ubuntu
docker load -i ubuntu.tar
docker rmi ubuntu:19.04
docker run -d jenkins # error
docker run -d jenkins/jenkins
docker ps
docker stop <container id>
docker ps -a
docker restart <container id>
docker ps
docker pause <container id>
docker unpause <container id>
docker stop <container id>
dcoker rm <container id>
docker images
docker ps # nothing
docker ps -a
docker rm <container id> # to delete container
docker rmi hello-world
docker run -it ubuntu bash # pull ubuntu image and run container by loging into it.
exit
--------------------------------------------------------------------------------------
docker pull ubuntu # pull from server and run automatically
docker run ubuntu
docker images
Running a Docker Container
root@u64:~# docker run -it ubuntu
root@197ce45e3452:/#
apt-get update
apt-get install apache2
service apache2 start
exit
docker ps
docker ps -a
docker run -it ubuntu bash equivalent to below 2 commands
docker start 197ce45e3452
docker exec -t -i 197ce45e3452 /bin/bash
root@197ce45e3452:/#service apache2 start
exit
docker run -d -p 9090:80 -t <image id for ubuntu> #port forwarding, where 9090 is port accessible from host for port 80 in docker container
ee15dd8ccb80
docker ps
ee15dd8ccb80
docker exec -t -i ee15dd8ccb80 /bin/bash #login to running container where ee15dd8ccb80 is container id
install apache2 and start it
And this can be accessed from host machine with http://192.168.56.106:9090/ where 192.168.56.106 is VM IP.
#saving container changes as an image'
root@u64:~# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
ee15dd8ccb80 1d9c17228a9e "/bin/bash" 19 minutes ago Up 19 minutes 0.0.0.0:9090->80/tcp inspiring_driscoll
root@u64:~# docker commit ee15dd8ccb80 ubuntu/apache2:version1
sha256:19a15616eeab871ffff39d70df7367a6188e407a3bed02f1dd8b29e4df8fcc80
root@u64:~# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
ubuntu/apache2 version1 19a15616eeab 11 seconds ago 255MB
hello-world latest fce289e99eb9 6 days ago 1.84kB
ubuntu latest 1d9c17228a9e 9 days ago 86.7MB
docker rm <container-id> # delete container if stopped
docker rm $(docker ps -q -f status=exited) # delete all stopped containers
docker rmi `docker images` #delete all images
#push image to docker hub
docker login --username=puneetbhatia77
docker tag 19a15616eeab puneetbhatia77/ubuntu-apache:version1 #tag image where puneetbatia77 is yourhubusername
sudo docker push puneetbhatia77/ubuntu-apache
------------------------------------------------------
docker with Jenkins
https://hackernoon.com/making-right-things-using-docker-7296cf0f6c6e
docker run --name myjenkins -p 9999:8080 -d jenkins/jenkins
docker ps # to get container id
docker exec -t -i <container id> /bin/bash
<ip of VM>:9999 #through host machine to access Jenkins URL
cat /var/jenkins_home/secrets/initialAdminPassword
=======================================================================================================
Dockerfile
root@u64-18-04-docker:~# cat Dockerfile
FROM ubuntu
RUN apt-get update
RUN ["apt-get", "install", "figlet"]
CMD ["figlet", "-f", "script", "hello world"]
docker build -t figlet1 .
docker run figlet1
root@u64-18-04-docker:~# cat Dockerfile
FROM ubuntu
RUN apt-get update
RUN ["apt-get", "install", "figlet"]
ENTRYPOINT ["figlet", "-f", "script"]
CMD ["hello world"]
docker build -t figlet .
docker run figlet
docker run figlet hello
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