Yatharth0045/docker-quickstart.sh

## docker-quickstart.sh
## Check docker server and client version
docker version

## Check for running containers | Currently, it should be empty
docker ps

## Check for images | Currently, it should be empty
docker images

## Now Pull an Image (Nginx) from DockerHub
## SYNTAX: docker pull <image-name>
docker pull nginx

## Check for the image again
docker images

## Run the image to get the container
## FYI, nginx is a webserver use to host webpages
## SYNTAX: docker run [OPTIONS...] <image-name>
docker run --name my-nginx -d nginx
## --name: To give a name to the container
## -d: Run the container in background (datach mode)

## Verify if container is running
docker ps

## Get logs for the container
## SYNTAX: docker logs <container-name/id>
docker logs my-nginx

## Executing a command within the container | Checking the default nginx configuration
## SYNTAX: docker exec <container-name/id> <cmd-to-be-executed>
docker exec my-nginx cat /etc/nginx/conf.d/default.conf

## Get various container information
## SYNTAX: docker inspect <container-name/id>
docker inspect my-nginx

## Get the default webpage of nginx container
## Find the container IP and open it over browser
docker inspect my-nginx -f '{{ range.NetworkSettings.Networks }}{{ .IPAddress }}{{ end }}'
## -f: Used to define the Format in which we want (get value against particular key)

## Let's try to stop the running container
## SYNTAX: docker stop <container-name/id>
docker stop my-nginx

## Check if container has stopped
docker ps -a
## -a: Show all containers (Running and Stopped)

## Start the container again
## SYNTAX: docker start <container-name/id>
docker start my-nginx

## Verify if container has started
docker ps
## Show only Running containers

## Edit the default webpage of Nginx to some HTML page of our own by modifying the container
## Create your own webpage using Heredoc syntax
cat > index.html << EOF
<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
<style>
    body {
        width: 35em;
        margin: 0 auto;
        font-family: Tahoma, Verdana, Arial, sans-serif;
    }
</style>
<body style="background-color:powderblue;">
<center>
<h1>This is Docker Quickstart</h1>
<h3>This tutorial is provided by <h2>Yatharth | DevOps Engineer at Knoldus</h2></h3>
<p> <b>Like and share</b> the blog if you found it helpful </p>
<p> For more blogs from this Author, <a href="https://blog.knoldus.com/author/yatharth45/" target="_blank" >Click here</a></p>
</center>
</body>
</html>
EOF

## Copy the html file from local to the container
## SYNTAX: docker cp </path/to/file> <container-name/id>:</dest/path/to/file>
docker cp index.html my-nginx:/usr/share/nginx/html/index.html

## Verify if nginx started rendering the updated html page | Get the container IP again and copy in the browser
docker inspect my-nginx -f '{{ range.NetworkSettings.Networks }}{{ .IPAddress }}{{ end }}'

## Now save the updated container with a new image
## Why?? | Since containers are ephemeral, the changes we have made will be lost once the container is stopped.
## SYNTAx: docker commit <container-name/id> <new-image-tag>
docker commit my-nginx my-nginx-image

## Check the new image
docker images

## Run the new container image
docker run --name my-new-nginx -d my-nginx-image

## Verify that the container is running
docker ps

## Check the webpage hosted by the new nginx container | Get the IP address of the container and copy it over browser.
docker inspect my-new-nginx -f '{{ range.NetworkSettings.Networks }}{{ .IPAddress }}{{ end }}'

## Rename the existing docker image to "<dockerhub-id>/<image-name>"
## WHY?? Because, for pushing the image to dockerhub, we need to follow the above format
## SYNTAX: docker tag <image-name> <dockerhub-id>/<new-image-name>
docker tag my-nginx-image yatharth0045/my-nginx-image

## Login to dockerhub via docker CLI using your dockerhub creds
docker login
## It will prompt for your ID and Password

## Push the image to dockerhub
## SYNTAX: docker push <dockerhub-id>/<image-name>
docker push yatharth0045/my-nginx-image

## Remove the running container
## Way 1 | Stop the container and then remove it
docker stop my-nginx && docker rm my-nginx
## Way 2 | Forcefully remove the container
docker rm -f my-new-nginx

## Delete the image from local
## Removing multiple images
## SYNTAX: docker rmi <image/s>
docker rmi nginx my-nginx-image yatharth0045/my-nginx-image
	## Check docker server and client version
	docker version

	## Check for running containers \| Currently, it should be empty
	docker ps

	## Check for images \| Currently, it should be empty
	docker images

	## Now Pull an Image (Nginx) from DockerHub
	## SYNTAX: docker pull <image-name>
	docker pull nginx

	## Check for the image again
	docker images

	## Run the image to get the container
	## FYI, nginx is a webserver use to host webpages
	## SYNTAX: docker run [OPTIONS...] <image-name>
	docker run --name my-nginx -d nginx
	## --name: To give a name to the container
	## -d: Run the container in background (datach mode)

	## Verify if container is running
	docker ps

	## Get logs for the container
	## SYNTAX: docker logs <container-name/id>
	docker logs my-nginx

	## Executing a command within the container \| Checking the default nginx configuration
	## SYNTAX: docker exec <container-name/id> <cmd-to-be-executed>
	docker exec my-nginx cat /etc/nginx/conf.d/default.conf

	## Get various container information
	## SYNTAX: docker inspect <container-name/id>
	docker inspect my-nginx

	## Get the default webpage of nginx container
	## Find the container IP and open it over browser
	docker inspect my-nginx -f '{{ range.NetworkSettings.Networks }}{{ .IPAddress }}{{ end }}'
	## -f: Used to define the Format in which we want (get value against particular key)

	## Let's try to stop the running container
	## SYNTAX: docker stop <container-name/id>
	docker stop my-nginx

	## Check if container has stopped
	docker ps -a
	## -a: Show all containers (Running and Stopped)

	## Start the container again
	## SYNTAX: docker start <container-name/id>
	docker start my-nginx

	## Verify if container has started
	docker ps
	## Show only Running containers

	## Edit the default webpage of Nginx to some HTML page of our own by modifying the container
	## Create your own webpage using Heredoc syntax
	cat > index.html << EOF
	<!DOCTYPE html>
	<html>
	<head>
	<title>Welcome to nginx!</title>
	<style>
	body {
	width: 35em;
	margin: 0 auto;
	font-family: Tahoma, Verdana, Arial, sans-serif;
	}
	</style>
	<body style="background-color:powderblue;">
	<center>
	<h1>This is Docker Quickstart</h1>
	<h3>This tutorial is provided by <h2>Yatharth \| DevOps Engineer at Knoldus</h2></h3>
	<p> <b>Like and share</b> the blog if you found it helpful </p>
	<p> For more blogs from this Author, <a href="https://blog.knoldus.com/author/yatharth45/" target="_blank" >Click here</a></p>
	</center>
	</body>
	</html>
	EOF

	## Copy the html file from local to the container
	## SYNTAX: docker cp </path/to/file> <container-name/id>:</dest/path/to/file>
	docker cp index.html my-nginx:/usr/share/nginx/html/index.html

	## Verify if nginx started rendering the updated html page \| Get the container IP again and copy in the browser
	docker inspect my-nginx -f '{{ range.NetworkSettings.Networks }}{{ .IPAddress }}{{ end }}'

	## Now save the updated container with a new image
	## Why?? \| Since containers are ephemeral, the changes we have made will be lost once the container is stopped.
	## SYNTAx: docker commit <container-name/id> <new-image-tag>
	docker commit my-nginx my-nginx-image

	## Check the new image
	docker images

	## Run the new container image
	docker run --name my-new-nginx -d my-nginx-image

	## Verify that the container is running
	docker ps

	## Check the webpage hosted by the new nginx container \| Get the IP address of the container and copy it over browser.
	docker inspect my-new-nginx -f '{{ range.NetworkSettings.Networks }}{{ .IPAddress }}{{ end }}'

	## Rename the existing docker image to "<dockerhub-id>/<image-name>"
	## WHY?? Because, for pushing the image to dockerhub, we need to follow the above format
	## SYNTAX: docker tag <image-name> <dockerhub-id>/<new-image-name>
	docker tag my-nginx-image yatharth0045/my-nginx-image

	## Login to dockerhub via docker CLI using your dockerhub creds
	docker login
	## It will prompt for your ID and Password

	## Push the image to dockerhub
	## SYNTAX: docker push <dockerhub-id>/<image-name>
	docker push yatharth0045/my-nginx-image

	## Remove the running container
	## Way 1 \| Stop the container and then remove it
	docker stop my-nginx && docker rm my-nginx
	## Way 2 \| Forcefully remove the container
	docker rm -f my-new-nginx

	## Delete the image from local
	## Removing multiple images
	## SYNTAX: docker rmi <image/s>
	docker rmi nginx my-nginx-image yatharth0045/my-nginx-image