Container Network LAB

LAB 1. Docker0 network

Configure containers and networks like below

Required Satisfaction Conditions

• Container image: busybox:latest
• Connet to inside with creating a container
• CMD [“sh”]
• Check those’s IP

Buiding Step

• C1
  $ docker run –name C1 -d -it –rm busybox:latest
  
• C2
  $ docker run –name C2 -d -it –rm busybox:latest
  

IP check

• C1
  $ docker attach C1 / # ifconfig

• C2
  $ docker attach C2 / # ifconfig

Create container with reference to the following conditions

• Container name: web
• Container image: nginx:latest
• Port-forwarding: Port 80
• Background-Activating

Building step

• $ docker run -d –name web -p 80:80 nginx:latest
• -d : background-activating
• –name: container name
• -p : port-forwarding
  

Q. How to know container web’s IP

• $ docker inspect web
  
• You can check docker0’s role as a gateway in the container network.

LAB 2. Port-Forwarding

O. Run 3 containers by the following below condition.

• Web1
  - Container image: nginx:latest - Container name: web1
  - Background-Activating
  - Insert command : -p 80:80

• Web2
  - Container image: nginx:latest - Container name: web2
  - Background-Activating
  - Insert : -p 80

• Web3
  - Container image: nginx:latest - Container name: web3
  - Background-Activating
  - Insert : -P

A. Building Step

• Web1
  $ docker run –name web1 -d -p 80:80 nginx:latest
• Web2
  $ docker run –name web2 -d -p 80 nginx:latest
• web3
  $ docker run –name web3 -d -P
  

LAB 3. Creating User-Defined Network

Q. Create a network for use at containers by following the below conditions

• subnet: 192.168.1.0/24
• gateway: 192.168.1.254
• network name : cloudnet

A. Building step

    ```
    $ docker network create --driver bridge \
    --subnet 192.168.1.0/24 \
    --gateway 192.168.1.254 \
    ```

Check

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