# Day 18 Task: Docker for DevOps Engineers -Part2

**Dear Engineers in today topic we will learn the Docker for the DevOps Engineers Part-2**

***Docker compose is a tool used for the developed to help define and share multiple container applications.With the help of docker compose command we can create a yaml file to determine the services with one single command.***

***What is YAML?***

***Yaml is a popular programming language because it is human readbale and easy to understand YAML files use .yml or .yaml extension***

### **Task-1**

***Docker compose- it is a tool that defining the running multi-container Docker applications. with the help of compose you use a yaml file to configure your applications.***

***Install the docker-compose***

***Syntax:- sudo apt-get install docker-compose -y***

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sudo apt-get install docker-compose -y Diagram.

***Step 2 : Create a docker-compose.yml file inside project folder***

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Docker compose yaml file Diagram.

* ***Version:3.3 it denotes we are using the version 3.3 docker compose.***
    
* ***Services: it wlill defines the different containers we will create.***
    
* ***build: keyword specifies the location of our dockerfile and represents the directory.***
    
* ***image:specify the image from docker hub for mysql containers***
    
* ***ports: keyword used for the ports that need to be exposed.***
    
* ***environment variables: for mysql which are required to run mysql.***
    
* ***Step 3: Run docker-compose.yml file***
    

***docker ps or docker-compose ps command list all the containers in the current docker-compose file.***

### **Task-2**

***1 Pull a pre-existing docker image form a public repository (eg docker hub)***

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docker pull nginx:alpine

***for running container as a non-root user, use command usermod to give user permission to docker***

***syntax: sudo usermod -a -G docker $USER***

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sudo usermod -a -G docker $USER

***2 Inspect the container running process and exposed ports using the docker inspect command***

***syntax:- docker inspect <container\_name or id>***

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docker inspect <container\_name or id> Diagram.

***3 Use the docker logs command to view the docker container log output***

***Synatx: sudo docker logs <container\_name or ID>***

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sudo docker Containers logs Diagram

***4 Use the docker stop and docker start commands to stop and start the container.***

***syntax: sudo docker stop <container-name or ID>***

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sudo docker stop <container-name or ID>

***Syntax: sudo docker start <container-name or ID>***

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sudo docker start <container-name or ID> Diagram.

***5 use the docker rm command to remove the container when you are done docker rm. remove one or more containers.***

***Syntax: sudo docker rm <container\_name or ID>***

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sudo docker rm <container\_name or ID> Diagram.

***Thank you for reading the article!!***