This repo contains the learnings of Docker
https://docs.docker.com/engine/install/ubuntu/
https://docs.docker.com/desktop/install/windows-install/
docker images docker image ls docker run = pull + create
docker pull ubuntu docker pull nginx
DTR: Docker Trusted Registry where all the docker images are available
docker images (all downloded images) docker pull docker rmi
docker run docker run -it ubuntu
-it means interactive terminal
docker ps shows the running containers
docker ps -a (all running and stopped container)
docker rmi -f nginx (this will forcefully delete the images without worring about the continers refering this image)
Containers is an instance of docker image
docker rm
docker stop docker start
container take space from Ram Images takes space from hard disk
docker start container-id
docker run will always create a new continer
docker exec -it
Docker Container Commands
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docker run
docker run -it ubuntu
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docker ps (running container)
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docker ps -a (all running and stopped container)
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docker rm
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docker stop
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docker start
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docker exec -it /bin/bash
delete all containers
docker ps -aq
The following need to be executed in git gitbash for windows docker rm -f $(docker ps -aq)
docker run -p 8002:80 -d nginx
Cli based container vs Web Based Container
docker inspect anil_container
docker stats
Day2
Containers vs Virtual Machines Build your own Docker image Tag and image Registry (Repository where you can add your docker image) local vs Remote Repository(Dockerhub)
Apphine is an OS whose size is 7.5 mb
Container size is way less than the actual VM size
Guest OS for VM Minimum OS for Containers
Responsibility of developer or deveops engineer to make the docker image.
C:\Users\sathi>docker run -d -p 8009:80 nginx 7e2ac4cd21330cc534531312e0d329a7eaab968809333bbb0a5a5110d13df684
C:\Users\sathi>docker exec -it 7e2ac4cd2 /bin/bash root@7e2ac4cd2133:/# ls bin dev docker-entrypoint.sh home lib64 mnt proc run srv tmp var boot docker-entrypoint.d etc lib media opt root sbin sys usr root@7e2ac4cd2133:/# cd usr/share/nginx/html root@7e2ac4cd2133:/usr/share/nginx/html# ls 50x.html index.html root@7e2ac4cd2133:/usr/share/nginx/html# docker images bash: docker: command not found root@7e2ac4cd2133:/usr/share/nginx/html# exit exit
What's next: Try Docker Debug for seamless, persistent debugging tools in any container or image → docker debug 7e2ac4cd2 Learn more at https://docs.docker.com/go/debug-cli/
C:\Users\sathi>docker images REPOSITORY TAG IMAGE ID CREATED SIZE hkshitesh/slwebapp 1.0 4906945f1933 5 days ago 192MB ubuntu latest dc4c1391d370 8 days ago 78.1MB nginx latest 7f553e8bbc89 2 weeks ago 192MB memcached latest a783d40c8b80 5 weeks ago 84.8MB
C:\Users\sathi>cd C:\Repos
C:\Repos>cd myapp
C:\Repos\MyApp>docker build -t slwebapp . [+] Building 0.7s (8/8) FINISHED docker:desktop-linux => [internal] load build definition from Dockerfile 0.0s => => transferring dockerfile: 99B 0.0s => [internal] load metadata for docker.io/library/nginx:latest 0.0s => [internal] load .dockerignore 0.0s => => transferring context: 2B 0.0s => [1/3] FROM docker.io/library/nginx:latest 0.2s => [internal] load build context 0.1s => => transferring context: 562B 0.0s => [2/3] WORKDIR /usr/share/nginx/html 0.0s => [3/3] COPY . . 0.1s => exporting to image 0.1s => => exporting layers 0.0s => => writing image sha256:9f65c28c529b14313c44bb1b7ff818c758eaac826641a26ccc5d411f15b53ef 0.0s => => naming to docker.io/library/slwebapp 0.0s
View build details: docker-desktop://dashboard/build/desktop-linux/desktop-linux/qwn4vbyzgzdnh7xd1qotbqo1o
What's next: View a summary of image vulnerabilities and recommendations → docker scout quickview
C:\Repos\MyApp>docker images REPOSITORY TAG IMAGE ID CREATED SIZE slwebapp latest 9f65c28c529b 59 seconds ago 192MB hkshitesh/slwebapp 1.0 4906945f1933 5 days ago 192MB ubuntu latest dc4c1391d370 8 days ago 78.1MB nginx latest 7f553e8bbc89 2 weeks ago 192MB memcached latest a783d40c8b80 5 weeks ago 84.8MB
C:\Repos\MyApp>docker run -d -p 8002:80 slwebapp 00d1826b98e7b4452c1843031d8b89a52a3a9d465ec194318627f680ccc65f9c
C:\Repos\MyApp>docker tag 9f65c28c529b 27349816v/slwebapp:1.0
C:\Repos\MyApp>docker login Authenticating with existing credentials... Login Succeeded
C:\Repos\MyApp>docker push 27349816v/slwebapp:1.0 The push refers to repository [docker.io/27349816v/slwebapp] fec7e04ad455: Pushed 5f70bf18a086: Mounted from hkshitesh/slwebapp 825fb68b6033: Mounted from hkshitesh/slwebapp 7619c0ba3c92: Mounted from hkshitesh/slwebapp 1c1f11fd65d6: Mounted from hkshitesh/slwebapp 6b133b4de5e6: Mounted from hkshitesh/slwebapp 3d07a4a7eb2a: Mounted from hkshitesh/slwebapp 756474215d29: Mounted from hkshitesh/slwebapp 8d853c8add5d: Mounted from hkshitesh/slwebapp 1.0: digest: sha256:ef5b9a8b208277f62bcd1511ff080c2e5aa81e800cdd58215cc1e3f013a507bd size: 2191
C:\Repos\MyApp>docker run -d -p 8004:80 27349816v/slwebapp:1.0 e6f494658c399265af9c46822b6d14ad2034d1a0cc0bd29ab0dd4844939bb230
Network
Docker Network ls
Docker Network create slnet
docker network inspect slnet
docker run -it --name ubuntu1 --network slnet ubuntu /bin/bash
docker run -it --name ubuntu2 --network slnet ubuntu /bin/bash
apt-get update -y apt-get install -y iputils-ping
docker run -dit --name container1 --network my_bridge busybox docker run -dit --name container2 --network my_bridge busybox
