dockerVolume.md

🐳 Docker Volume 🐳

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Docker container gets a temperary memory if we make a database inside the container and write it when the container gets deleted the database and the data also get deleted

docker volumes are a kind of permanent storage which you can bind with your container making it a permanent storage for your container

Let's mount a local directory to a container

• make a app folder with index.js file having the following code console.log("Hello World from nikhil")
• open terminal pull a node image

docker run -it node:latest
docker container ls -a  ## a stands for all

• Let's moun the app folder to node container docker run -it -v [Location of app]:/home/app node bash If you are in windows use this command docker run -it -v %cd%/dockerVolume:/home/app node bash cd = current directory for windows like pwd cwd %cd% it will treated as variable A bash will open do

uname whoami ls [separately]
To see the code inside the index.js
cat index.js

• Let's install the nodemon to check whether the folder is mounted properly or not and also syncing with the container or not

npm i -g nodemon
nodemon index.js

now make changes in index.js it should reflect in the node container

Create and remove a volume

docker volume create data
docker volume ls
docker volume rm data 

Mounting volume to container[data volume to node container]

docker run -it -v data:/data node bash let's make a directory inside the volume

cd data
mkdir nikhil-dubey

Lets check whether the directory is made or not

open new terminal and mount volume data to ubuntu image docker run -it -v data:/myapp ubuntu bash

• The data directory is mounted to myapp folder go inside it
• do ls you will see the nikhil-dubey folder
• make a new directory nikhild
• Go inside the node container you will see the nikhild inside the data folder