MAC Address Issues for Docker Containers

6min
Docker engine will generate a new MAC address each time a container is created. If you install Litmus Edge in Docker, the license depends on the MAC address. If the container is recreated and gets a new MAC address, the license will not work.
Solution
If you need to re-install Litmus Edge, don't delete the original container. Instead, stop it using the command: docker stop <container name or id>. Then, continue installing the new container. 
If the original container is deleted, see the steps below to configure the new container with the same MAC address. 
Step 1: Run Docker Container
In the command below, Docker Alpine is used. 
docker run --name=alpine -dit alpine /bin/ash
Review the following descriptions of the parameters in the command. 
--name: container name
-d: Run container in background and print container ID
-i: Keep STDIN open even if not attached
-t: Allocate a pseudo-TTY
alpine: alpine linux distribution
/bin/bash: run bash on container
Learn more about docker container run. 
Step 2: Get MAC Address of Container
Use the following command to view and copy the MAC address of the container. 
docker inspect alpine |grep MacAddress|tr -d ' ,"'|sort -u
If you get this error from above command: 'grep' is not recognized as an internal or external command, use the command below:
docker inspect -f '{{.NetworkSettings.MacAddress}}' alpine
Expect an output like this: MacAddress:02:42:0a:1e:32:02
Copy the MAC address part 02:42:0a:1e:32:02
Step 3: Recreate Container
Use the following command to recreate the Litmus Edge container. Replace the MAC address with your specific address information. 
The use of the option --mac-address is to specify the old mac address.
docker run --name=alpine -dit --mac-address 02:42:0a:1e:32:02 alpine /bin/ash
Step 4: Verify MAC Address
Use the command in Step 2 to verify that the correct MAC address is being used by the new container. 
Updated 04 Jun 2024
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