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TASK_76-Run_a_Docker_Container.md

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Start:         2022-12-24 11:38:56
Finished:   2022-12-24 11:46:50

TASK 76: Run a Docker Container

Requirements

Nautilus DevOps team is testing some applications deployment on some of the application servers. They need to deploy a nginx container on Application Server 3. Please complete the task as per details given below:

On Application Server 3 create a container named nginx_3 using image nginx with alpine tag and make sure container is in running state.

Steps

Log-in to the specified app server.

sshpass -p  'BigGr33n' ssh -o StrictHostKeyChecking=no [email protected]
sudo su

As best practice, always check the existing containers and images on the machien first.

docker ps -a 
docker images

Create the container. This can be done through a YAML file, but since it's a fairly simple container, we can just run the CLI command with parameters.

docker run -d --name nginx_3 -p 8080:80 nginx:alpine

Verify that the image is pulled down and that the container is running.

[root@stapp03 banner]# docker images

REPOSITORY   TAG       IMAGE ID       CREATED       SIZE
nginx        alpine    1e415454686a   10 days ago   40.7MB  
[root@stapp03 banner]# docker ps -a 

CONTAINER ID   IMAGE          COMMAND                  CREATED          STATUS          PORTS                  NAMES
905c8c922a78   nginx:alpine   "/docker-entrypoint.…"   13 seconds ago   Up 11 seconds   0.0.0.0:8080->80/tcp   nginx_3

As an additional test, we could also run a curl to the loclahost via port 8080. It shold return a "200 OK" message.

[root@stapp03 banner]#  curl -I localhost:8080

HTTP/1.1 200 OK
Server: nginx/1.23.3
Date: Sat, 24 Dec 2022 03:43:57 GMT
Content-Type: text/html
Content-Length: 615
Last-Modified: Tue, 13 Dec 2022 18:23:05 GMT
Connection: keep-alive
ETag: "6398c309-267"
Accept-Ranges: bytes

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