You want to update a running service frontend to use a new image version frontend:v2 without downtime. Which command achieves this?

hard📝 Workflow Q9 of 15

Docker - Swarm

You want to update a running service frontend to use a new image version frontend:v2 without downtime. Which command achieves this?

Adocker service scale frontend=0 && docker service create --name frontend frontend:v2

Bdocker service update --image frontend:v2 frontend

Cdocker service restart frontend --image frontend:v2

Ddocker container update --image frontend:v2 frontend

Step-by-Step Solution

Solution:

Step 1: Identify update command
'docker service update' updates service properties including image without downtime.
Step 2: Eliminate incorrect options
Restart command does not accept image flag; scaling down removes service; container update is invalid.
Final Answer:
docker service update --image frontend:v2 frontend -> Option B
Quick Check:
Use 'docker service update' to change image live [OK]

Quick Trick: Use 'docker service update --image' to upgrade services smoothly [OK]

Common Mistakes:

Master "Swarm" in Docker

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