Docker Containers Share Data

#Introduction

In this tutorial, How to Share Data Between Docker Containers. Now, let go Docker Containers Share Data.

I will deploy 2 containers using docker to share data between containers.

Docker containers can share data using various mechanisms provided by Docker. Here are a few ways to share data between Docker containers.

Prerequisites

• Host OS: Ubuntu 21.04
• Installed Docker

Create a Volume for Docker containers share data

We will create a Volume to save our data as command below:

docker volume create --name persistent-data-devops

The volume is created in the /var/lib/docker/volumes directory.

vagrant@devopsroles:~$ sudo ls /var/lib/docker/volumes/persistent-data-devops/_data/test.txt
/var/lib/docker/volumes/persistent-data-devops/_data/test.txt

For example, We will deploy the first container which will use the persistent volume.

docker run -it --name=container1 -v persistent-data-devops:/data ubuntu:latest

• The container named: container1
• mount the persistent-data-devops volume into the /data directory within the new container

Login new container and create a new file

echo "Hello, www.devopsroles.com" >> /data/test.txt

We’ll now deploy a second container as command below

docker run -it --name=container2 -v persistent-data-devops:/data ubuntu:latest

Login second container and display content

cat /data/test.txt

Edit /data/test.txt file. I use the vim command line.

Add the following at the bottom of the file:

This data share between containers 1 and 2

The output terminal as below

vagrant@devopsroles:~$ docker run -it --name=container2 -v persistent-data-devops:/data ubuntu:latest

root@ed16b6be95f8:/# cat /data/test.txt
Hello, www.devopsroles.com

root@ed16b6be95f8:/# vim /data/test.txt
root@ed16b6be95f8:/# cat /data/test.txt
Hello, www.devopsroles.com
This data share between containers 1 and 2

Exit the running container with the exit command. You can stop and remove them with the commands:

docker stop ID
docker rm ID

After stopping and removing docker container1, we will deploy again, But data will remain data.

Via Youtube

Conclusion

You have to Docker Containers Share Data. These are some of the common methods to share data between Docker containers. Choose the one that best suits your requirements based on the nature of the data and the use case you have in mind. I hope will this your helpful. Thank you for reading the DevopsRoles page!