Dockerlab 106 Docker Networking

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

Click on start

It will start a 4 hr session

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

cleanup }}