Dockerlab 106 Docker Networking

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In case you prefer a video, check below our YouTube video for this lab

Create docker hub account. Docker Hub skip this step if you already have one

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Open Play with Docker

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Click on start

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It will start a 4 hr session

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click on + ADD NEW INSTANCE

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Task: List all docker networks

Solution

docker network ls

Task: create a new bridge network

Solution

docker network create -d bridge mbn

Task: Run a container web with image nginx and new network, expose port 8080 as 80

Solution

docker run -d -p 8080:80 --name web --network=mbn nginx

Task: Inspect network settings of container created in previous step

Solution

docker inspect web

docker inspect --format='{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' web

Task: Run a container jumphost with image alpine and connect to it

Solution

docker run -it --name jumphost alpine

Task: Access port 80 of container web from jumphost

Solution

wget -T 3 172.19.0.2

Task: Change network used by container jumphost to mbn

Solution

docker network connect mbn jumphost

Task: Start container jumphost

Solution

docker start jumphost

Task: Connect to jumhost container and access port 80 of container web

Solution

docker exec -it jumphost sh

this command will connect to container jumphost shell

wget -T 3 172.19.0.2

try to access container web from jumphost

this time it will download index.html file

cat index.html

it will display nginx welcome page

Task: Inspect docker network mbn

Solution

docker inspect mbn

check network mbn

you will observe that both containers are connected to it

Task: Disconnect container web and jumphost from network mbn

Solution

docker network disconnect mbn jumphost

docker network disconnect mbn web

Task: List all docker networks

Solution

docker network ls

Task: Check docker info

Solution

docker info

docker info | grep -i network

Task: Check option for docker network command

Solution

docker network

Task: Delete all open nodes/instances and close session

Select the node and click on DELETE
Repeat same for any other open nodes
click close session

In this lab we will practice, docker networking related commands

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