Day 16: Docker for DevOps Engineers ??

Docker ?????

Docker is a software platform that allows you to build, test, and deploy applications quickly. Docker packages software into standardized units called containers that have everything the software needs to run including libraries, system tools, code, and runtime. Using Docker, you can quickly deploy and scale applications into any environment and know your code will run.

Tasks

1.Use the?docker run?command to start a new container and interact with it through the command line.

docker run - It is used to create a new container.

for detached mode: docker run -d <image name or id>

• To create a container with port number:
• command -?docker run -d -p 8080:80 <image-name>

2.Use the?docker inspect?command to view detailed information about a container or image.

Inspect provides you with a bunch of metadata about all the different objects managed by docker. This includes the following:-

1. Containers.
2. Images.
3. Networks.
4. Volumes.
5. Contexts.
6. Plugins.
7. Nodes (swarm object).
8. Services (swarm object).
9. Secrets (swarm object).
10. Configs (swarm object).

3.Use the?docker port?command to list the port mappings for a container.

command -?docker port <container-name>

docker port Container-name [PRIVATE_PORT[/PROTO]]

4.Use the?docker stats?command to view resource usage statistics for one or more containers.

docker stats : Show live usage for container statistics.

• returns a live data stream for running containers

Options:

• --all??-a: Show all containers (default shows just running)
• --format: Pretty print images using a Go template
• --no-stream: Disable streaming stats and only pull the first result

5.Use the?docker top?command to view the processes running inside a container.

docker top: Display the running processes of a container.

command:?docker top <container>

6. Use the?docker save?command to save an image to a tar archive.

docker save?: Save one or more images to a tar archive?

command :?docker save [options] [image]

option:?--output?,?-o?: Write to a file

7. Use the?docker load?command to load an image from a tar archive.

command :?docker load [options]

options:

• --input?,?-i : Read from tar archive file

I'm delighted you made it this far and I really appreciate it. Please spread the word to your peers. ????