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![3 docker run -it --rm -p 3000:3000 -d bitnami/node-example:0.0.1 or Note: - Running with Docker CONTAINER ID -d, - For running ID’s 3 characters are enough if it makes it unique docker run -it --rm -p 3000:3000 -d 8b8 or docker run -it -p 3000:3000 bitnami/node-example:0.0.1 or Note: name docker run ––name nginx–test –d nginx here, name is optional docker run -it -p 3001:3000 --name bit bitnami/node-example:0.0.1 or 6. Stop a docker container docker stop [container ID/name] Copyright © UI5CN](https://image.slidesharecdn.com/gettingstarteddockerdev-opsnotes-200408150051/75/Getting-started-docker-notes-3-2048.jpg)
![4 7. Check the Status and Health of the Docker and status docker inspect [container ID/name] 8. Check the App Logs inside Docker docker logs [container ID/name] 9. Remove the Docker container from memory docker rm [Name of Container/ID] or Note: We can also perform the below command to remove all, so carefull ! docker rm $(docker ps -a) Copyright © UI5CN](https://image.slidesharecdn.com/gettingstarteddockerdev-opsnotes-200408150051/75/Getting-started-docker-notes-4-2048.jpg)
![5 10. Remove Image from the Docker container docker image rm [container ID/name] Note: If the image is in memory, it needs to be forced with -f flag, then the image will delink from the memory instance and get deleted docker image rm [container ID/name] -f or docker image rm $(docker image ls -a) 11. Connecting to Docker Image docker pull nginx docker run -it -p 8081:80 -d nginx:latest Copyright © UI5CN](https://image.slidesharecdn.com/gettingstarteddockerdev-opsnotes-200408150051/75/Getting-started-docker-notes-5-2048.jpg)
![6 12. Going inside Docker using exec docker exec -it [name] /bin/bash 13. Steps to Build Docker file With a Simple NodeJS App In these steps, we will install IDE in your cloud VM. After that, we will install the IDE and create a simple NodeJS App and Add it in a Docker container. Note: In cloud system you can use cloud editor from here: https://github.com/cdr/code-server/releases With below steps and command Step A: wget https://github.com/cdr/code-server/releases/download/2.1692-vsc1.39.2 /code-server2.1692-vsc1.39.2-linux-x86_64.tar.gz Step B: tar -xf code-server2.1692-vsc1.39.2-linux-x86_64.tar.gz Step C: cd code-server Copyright © UI5CN](https://image.slidesharecdn.com/gettingstarteddockerdev-opsnotes-200408150051/75/Getting-started-docker-notes-6-2048.jpg)
![9 # If you are building your code for production # RUN npm ci --only=production # Bundle app source COPY . . EXPOSE 8080 CMD [ "node", "index.js" ] Step K: Now Building Docker Image docker build -t demoapp . Step L: Now, check the newly build containers docker image ls -a Step M: Run the Docker image which we created, here demoapp:latest is name:tag docker run -it -d -p 8083:8080 demoapp:latest Copyright © UI5CN](https://image.slidesharecdn.com/gettingstarteddockerdev-opsnotes-200408150051/75/Getting-started-docker-notes-9-2048.jpg)
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Getting started docker notes
1. The document provides steps for getting started with Docker, including installing Docker, pulling and running Docker images, connecting to and removing Docker containers. 2. It explains how to build a Dockerfile for a simple Node.js app, including creating the app, adding a Dockerfile, building the Docker image, and running the container. 3. The steps cover installing Docker, pulling images, running containers with port mapping, checking statuses, removing containers and images, and connecting to containers via exec.
Getting started docker notes
- 1. Getting Started Last UpdatedDate: 08/04/2020 Steps and Code 1. Lets Install Docker - Ubuntu Machine (snap need to be installed) snap install docker Note: sudo is required in some cases, else you can switch to root and operate . Also, setting up with root is not recommended if you are in production or development machine. 2. Verify it is installed docker --version
- 2. 2 3. Let’s Pulla Docker image docker pull bitnami/node-example:0.0.1 4. Let’s See all the docker image in our system, at this point docker image is not running so we use docker image-name 5. Let’s run the docker image we downloaded docker run -p 3000:3000 bitnami/node-example:0.0.1 or docker run -it --rm -p 3000:3000 bitnami/node-example:0.0.1 Note: -it is interactive logs -p port mapping <own port>:<docker port> -rm Automatically remove the container when it exits -d Background running , detached mode Copyright © UI5CN
- 3. 3 docker run -it--rm -p 3000:3000 -d bitnami/node-example:0.0.1 or Note: - Running with Docker CONTAINER ID -d, - For running ID’s 3 characters are enough if it makes it unique docker run -it --rm -p 3000:3000 -d 8b8 or docker run -it -p 3000:3000 bitnami/node-example:0.0.1 or Note: name docker run ––name nginx–test –d nginx here, name is optional docker run -it -p 3001:3000 --name bit bitnami/node-example:0.0.1 or 6. Stop a docker container docker stop [container ID/name] Copyright © UI5CN
- 4. 4 7. Check theStatus and Health of the Docker and status docker inspect [container ID/name] 8. Check the App Logs inside Docker docker logs [container ID/name] 9. Remove the Docker container from memory docker rm [Name of Container/ID] or Note: We can also perform the below command to remove all, so carefull ! docker rm $(docker ps -a) Copyright © UI5CN
- 5. 5 10. Remove Imagefrom the Docker container docker image rm [container ID/name] Note: If the image is in memory, it needs to be forced with -f flag, then the image will delink from the memory instance and get deleted docker image rm [container ID/name] -f or docker image rm $(docker image ls -a) 11. Connecting to Docker Image docker pull nginx docker run -it -p 8081:80 -d nginx:latest Copyright © UI5CN
- 6. 6 12. Going insideDocker using exec docker exec -it [name] /bin/bash 13. Steps to Build Docker file With a Simple NodeJS App In these steps, we will install IDE in your cloud VM. After that, we will install the IDE and create a simple NodeJS App and Add it in a Docker container. Note: In cloud system you can use cloud editor from here: https://github.com/cdr/code-server/releases With below steps and command Step A: wget https://github.com/cdr/code-server/releases/download/2.1692-vsc1.39.2 /code-server2.1692-vsc1.39.2-linux-x86_64.tar.gz Step B: tar -xf code-server2.1692-vsc1.39.2-linux-x86_64.tar.gz Step C: cd code-server Copyright © UI5CN
- 7. 7 Step D: ChangePermission chmod 777 code-server Step E: Start the Editor(use of Sudo is for entering into admin mode to edit files which have special permission with Editor) sudo ./code-server .. -p 8443 Note: You will get the password to enter the IDE which will be required to use it Step F: Install NodeJS in the machine to use $ curl -sL https://deb.nodesource.com/setup_13.x | sudo -E bash - $ sudo apt-get install nodejs Step G: Create a Blank Project With NodeJS and Express $ npm init $ touch index.js $ touch Dockerfile $ npm i express Copyright © UI5CN
- 8. 8 Step H: Addnode index.js as the start script "scripts": { "start": "node index.js" } Step I: Inside Index.js add below code const express = require('express'); // Constants const PORT = 8080; const HOST = '0.0.0.0'; // App const app = express(); app.get('/', (req, res) => { res.send('Hello worldn'); }); app.listen(PORT, HOST); console.log(`Running on http://${HOST}:${PORT}`); Step J: Create Dockerfile with below content # Create app directory WORKDIR /usr/src/app # Install app dependencies # A wildcard is used to ensure both package.json AND package-lock.json are copied # where available (npm@5+) COPY package*.json ./ RUN npm install Copyright © UI5CN
- 9. 9 # If youare building your code for production # RUN npm ci --only=production # Bundle app source COPY . . EXPOSE 8080 CMD [ "node", "index.js" ] Step K: Now Building Docker Image docker build -t demoapp . Step L: Now, check the newly build containers docker image ls -a Step M: Run the Docker image which we created, here demoapp:latest is name:tag docker run -it -d -p 8083:8080 demoapp:latest Copyright © UI5CN