Docker Installation

# Docker Installation Mac: [Docker Desktop for Mac](https://hub.docker.com/editions/community/docker-ce-desktop-mac) Windows: [Docker Desktop for Windows](https://hub.docker.com/editions/community/docker-ce-desktop-windows) Linux: ``` sudo apt-get update sudo apt-get upgrade sudo apt install docker.io sudo systemctl start docker sudo systemctl enable docker sudo systemctl status docker ``` :::spoiler **Installation Steps for Mac/Windows:** 1. Download Windows/Mac docker installable from above links. 2. Install dmg/exe files by following on-screen instructions and provide credentials If needed. **Installation Steps for Linux Ubuntu:** 1. Execute above commands in Linux Terminal. ::: # Docker Lab Setup > [color=#00bfff] **Linux Ubuntu VM Hostnames** ``` docker001.westeurope.cloudapp.azure.com docker002.westeurope.cloudapp.azure.com docker003.westeurope.cloudapp.azure.com .. .. docker009.westeurope.cloudapp.azure.com docker001.eastus.cloudapp.azure.com docker001.eastus2.cloudapp.azure.com docker001.westus.cloudapp.azure.com docker001.westus2.cloudapp.azure.com ``` > [color=#00bfff] **Connect From Windows/Mac** HostName: docker00X.westeurope.cloudapp.azure.com Username: ubuntu Password: DockerUser@123 ==Syntax:== ssh <username>@<hostname> > Example ```bash= ssh ubuntu@docker000.westeurope.cloudapp.azure.com ``` :::info :bulb: Note: Type 'yes' for 1st time login with ssh and enter password ::: :::spoiler **Mac:** 1. Open ==Terminal== and execute above commands **Windows:** 1. Connect from [Putty](https://www.putty.org/) or [Chrome Secure shell](https://chrome.google.com/webstore/detail/secure-shell-app/pnhechapfaindjhompbnflcldabbghjo/related?hl=en) User1. docker000.eastus.cloudapp.azure.com docker001654442.eastus.cloudapp.azure.com User2. docker002.eastus.cloudapp.azure.com docker003.eastus.cloudapp.azure.com User3. docker004.eastus.cloudapp.azure.com docker005.eastus.cloudapp.azure.com User4. docker006.eastus.cloudapp.azure.com docker007.eastus.cloudapp.azure.com User5. docker008.eastus.cloudapp.azure.com docker009.eastus.cloudapp.azure.com User6. docker000.eastus2.cloudapp.azure.com docker001.eastus2.cloudapp.azure.com User7. docker002.eastus2.cloudapp.azure.com docker003.eastus2.cloudapp.azure.com User8. docker004.eastus2.cloudapp.azure.com docker005.eastus2.cloudapp.azure.com User9. docker006.eastus2.cloudapp.azure.com docker007.eastus2.cloudapp.azure.com User10. docker008.eastus2.cloudapp.azure.com docker009.eastus2.cloudapp.azure.com User11. docker000.westus.cloudapp.azure.com docker001.westus.cloudapp.azure.com User12. docker002.westus.cloudapp.azure.com docker003.westus.cloudapp.azure.com User13. docker004.westus.cloudapp.azure.com docker005.westus.cloudapp.azure.com User14. docker006.westus.cloudapp.azure.com docker007.westus.cloudapp.azure.com User15. docker008.westus.cloudapp.azure.com docker009.westus.cloudapp.azure.com User16. docker000583293.westus2.cloudapp.azure.com docker001.westus2.cloudapp.azure.com User17. docker002.westus2.cloudapp.azure.com docker003.westus2.cloudapp.azure.com User18. docker004.westus2.cloudapp.azure.com docker005.westus2.cloudapp.azure.com User19. docker006.westus2.cloudapp.azure.com docker007.westus2.cloudapp.azure.com User20. docker008.westus2.cloudapp.azure.com docker009.westus2.cloudapp.azure.com User21. docker000.westeurope.cloudapp.azure.com docker001.westeurope.cloudapp.azure.com User22. docker002.westeurope.cloudapp.azure.com docker003.westeurope.cloudapp.azure.com User23. docker004.westeurope.cloudapp.azure.com docker005.westeurope.cloudapp.azure.com User24. docker006.westeurope.cloudapp.azure.com docker007.westeurope.cloudapp.azure.com User25. docker008.westeurope.cloudapp.azure.com docker009.westeurope.cloudapp.azure.com User26. docker000.northeurope.cloudapp.azure.com docker001.northeurope.cloudapp.azure.com User27. docker002.northeurope.cloudapp.azure.com docker003.northeurope.cloudapp.azure.com User28. docker004.northeurope.cloudapp.azure.com docker005.northeurope.cloudapp.azure.com User29. docker006.northeurope.cloudapp.azure.com docker007.northeurope.cloudapp.azure.com User30. docker008.northeurope.cloudapp.azure.com docker009.northeurope.cloudapp.azure.com ::: # Docker Validation ```bash= docker -v ``` ### Docker Hub URL: [Docker Hub URL](https://hub.docker.com/) gaptech # Run sample Docker Container **Docker Image:** gaptech/dockerdemo ```bash= docker pull gaptech/dockerdemo docker images docker container run -d -p 8082:80 --name my_first_container gaptech/dockerdemo docker ps -a ``` > Validation http://docker001.centralus.cloudapp.azure.com:8082 http://docker001.centralus.cloudapp.azure.com:8082/welcome.html # Play with Docker Commands > [color=#757575] Stop ```bash= docker container stop my_first_container ``` > [color=#66b032] Start ```bash= docker container start my_first_container ``` > [color=#ff0000] Remove ```bash= docker container rm -f my_first_container ``` # Container Lifecycle Commands ==Syntax:== docker container <container-state> <container-id> (or) <container-name> :::info Note: we can find container id using “docker ps –a ” command ::: :::spoiler > [color=#757575] Stop ```bash= docker container stop my_first_container ``` > [color=#66b032] Start ```bash= docker container start my_first_container ``` > [color=#3cd070] Restart ```bash= docker container restart my_first_container ``` > [color=#8b0000] Kill ```bash= docker container kill my_first_container ``` > [color=#ffb300] Pause ```bash= docker container pause my_first_container ``` > [color=#48d1cc] Unpause ```bash= docker container unpause my_first_container ``` > [color=#ff0000] Remove ```bash= docker container rm -f my_first_container ``` > [color=#ff0000] Remove All Containers ```bash= docker container rm -f $(docker ps -aq) ``` ::: # Portainer Docker Container > Installation ```bash= docker volume create portainer_data docker run -d -p 8000:8000 -p 9000:9000 -v /var/run/docker.sock:/var/run/docker.sock -v portainer_data:/data --name portainer portainer/portainer ``` > Validation: http://docker001.centralus.cloudapp.azure.com:9000 # Other Docker Commands: :::spoiler >Login ```bash= docker login ``` Note: Enter docker hub credentials. Creds: gaptech/GapTech@123 >Logout ```bash= docker logout ``` >Logs ```bash= docker container logs –f <container-id> ``` Note: Running a container without detach flag show logs. >Info ```bash= docker info ``` Note: Display all docker information like containers running >Exec ```bash= docker container exec -it <container-id> /bin/bash ``` Note: To log into container bash Note: Enter “exit” command to get out from the container. ::: # Docker Environmental Variables :::info ==Syntax:== docker container run -d -p 8080:8080 -e key=value -e key=value --name image-name gaptech/dockerdemo ::: ## Run RabbitMQ Container with ENV’s > without ENV variables: ```bash= docker container run -d -p 8091:15672 --name rabbitmq rabbitmq:3-management ``` :::info RabbitMQ docker container will be launched with default creds i.e., guest/guest ::: > Validation: http://docker001.centralus.cloudapp.azure.com:8091 > with ENV variables: ```bash= docker container run -d -p 8092:15672 --name rabbitmq-with-env -e RABBITMQ\DEFAULT_USER=gaptech -e RABBITMQ_DEFAULT_PASS=gaptech rabbitmq:3-management ``` :::info Note: Note: RabbitMQ docker container will be launched with custom creds i.e., gaptech/gaptech ::: > Validation: http://docker001.centralus.cloudapp.azure.com:8092 # Docker Volumes ==Syntax:== docker volume create <docker-volume-name> :::info Example: docker volume create volume1 ::: ## Jenkins Docker Container ```bash= docker volume create jenkins_home docker run -p 8085:8080 -v jenkins_home:/var/jenkins_home --name jenkins jenkins/jenkins:lts ``` **Validation:** Jenkins should be accessible http://docker001.centralus.cloudapp.azure.com:8085/ > Case1: Remove the Container and Rerun the container ```bash= docker container rm -f jenkins docker run -p 8085:8080 -v jenkins_home:/var/jenkins_home --name jenkins jenkins/jenkins:lts ``` **Validation:** Previous Jobs should Exist http://docker001.centralus.cloudapp.azure.com:8085/ > Case2: Run another container without volume, different port & different container name ```bash= docker run -p 8086:8080 --name jenkins-without-volume jenkins/jenkins:lts ``` **Validation:** Fresh Jenkins setup in 8086 port http://docker001.centralus.cloudapp.azure.com:8085/ http://docker001.centralus.cloudapp.azure.com:8086/ # Build Spring Boot App as Docker Image GitHub - [Spring Boot App Source Code](https://github.com/gaptech/springbootapp.git) Step1: Open IntelliJ and Import the above project Step2: Build Jar by executing below command ```bash= ./gradlew clean build ``` Step3: create a file named “Dockerfile” in project root directory Step4: Write Dockerfile as below ```dockerfile= FROM openjdk:8 EXPOSE 8090 ADD build/libs/springbootapp-0.0.1-SNAPSHOT.jar springbootapp-0.0.1-SNAPSHOT.jar ENTRYPOINT ["java","-jar","/springbootapp-0.0.1-SNAPSHOT.jar"] ``` Step5: Modify parameters like port, jar name as per your configuration. (If needed) Step6: > **Way1:** If Docker Installed in Mac/Windows Open a terminal where Dockerfile folder resides. Example: ../../<project-name>/ ==Syntax:== docker build -t <docker-image-name> <docker-file-path> > **Example** ```bash= docker build -t gaptech/springbootapp . ``` ## Run Spring Boot Docker Container ``` bash= docker images docker container run -d -p 8090:8090 --name myspringbootapp gaptech/springbootapp docker ps -a ``` Validation: ```bash= URL: [http://docker001.centralus.cloudapp.azure.com:8090](http://localhost:8090/) URL: http://docker001.centralus.cloudapp.azure.com:8090/hellodocker ``` ## Pushing Docker Images to Docker Hub ```bash= Syntax: docker push <image-name> Example: docker push gaptech/springbootapp ``` Validate Docker Image from Docker Hub Docker Hub: https://hub.docker.com/ :::info Docker Hub Credentials: username: gaptech password: GapTech@123 ::: # Docker Compose :::spoiler [Docker Compose File GitLink](https://github.com/gaptech/DockerFiles/blob/master/docker-compose.yaml) ```bash= docker compose up –d ``` Note: File name should be docker-compose.yaml (or) docker-compose.yml Docker Compose - Example Example DockerCompose: [WordPress Docker Compose File](https://docs.docker.com/compose/wordpress/) Step1: create a file with docker-compose.yml and paste the above sample compose file Step2: Execute the below command ```bash= Command: docker-compose up -d ``` Step3: Validate Docker containers from UI ::: # Creating a Docker Swarm Cluster Step1: Get the IP address of VM using below command ```bash= curl ifconfig.co ``` Step2: ```bash= Syntax: docker swarm init --advertise-addr=<leader-node-ip-address> Example: docker swarm init --advertise-addr=192.168.0.23 ``` Step3: ```bash= docker swarm join --token <swarm-token> <leader-node-ip>:<generated-port> ``` Step4: ```bash= docker node ls ``` ## Deploy Docker Container in Swarm Cluster ```bash= Syntax: docker service create -d -p <port> --name <name-of-service> --replicas=<count> <image-name> Example1: docker service create -d -p 8090:8090 --name swarmtest --replicas=5 gaptech/dockerdemo Example2: docker service create -d -p 8091:80 --name springbootservice --replicas=5 gaptech/springbootapp ``` ```bash= Command: docker service ls ``` ```bash= Command: docker ps -a ``` ```bash= Syntax: docker service ps <service-name> Command: docker service ps swarmtest ``` ## Scaling Docker Services in Swarm Scaling UP ```bash= Syntax: docker service scale <service-name>=<new-count> Example: docker service scale swarmtest=10 ``` Scaling Down ```bash= Example: docker service scale swarmtest=2 ``` Removing ```bash= Example: docker service rm swarmtest ## Docker Stack File Docker Stack YAML File ```yaml= version: '3.3' services: myspringbootapp: image: gaptech/springbootapp:latest ports: \- 8090:8090/tcp deploy: replicas: 5 placement: constraints: \- node.hostname == master dockerdemo: image: gaptech/dockerdemo:latest ports: \- 8091:80/tcp deploy: replicas: 5 ``` ==Syntax:== docker stack deploy --compose-file <docker-yaml.yml> <stack-name> ```bash= docker stack deploy --compose-file docker-compose.yml centric ```

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