Given the following commands, what will be the output of docker ps after switching traffic to green?

medium📝 Command Output Q4 of 15

Docker - Production Patterns

Given the following commands, what will be the output of docker ps after switching traffic to green?

docker run -d --name blue_app app:v1
docker run -d --name green_app app:v2
docker stop blue_app
docker start green_app

ANo containers are running

BBoth blue_app and green_app containers are running

COnly green_app container is running

DOnly blue_app container is running

Step-by-Step Solution

Solution:

Step 1: Analyze container states after commands
blue_app is stopped, green_app is started and running.
Step 2: Understand docker ps output
docker ps shows running containers only, so only green_app appears.
Final Answer:
Only green_app container is running -> Option C
Quick Check:
Stopped containers do not show in docker ps [OK]

Quick Trick: docker ps shows only running containers [OK]

Common Mistakes:

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