You have a Docker service with 10 replicas. To perform a rolling update that updates 3 containers at a time and waits 5 seconds between each batch, which command should you use?

hard📝 Workflow Q8 of 15

Docker - Swarm

Adocker service update --image myapp:latest --update-parallelism 1 --update-delay 10s myservice

Bdocker service update --image myapp:latest --update-parallelism 5 --update-delay 3s myservice

Cdocker service update --image myapp:latest --update-parallelism 10 --update-delay 0s myservice

Ddocker service update --image myapp:latest --update-parallelism 3 --update-delay 5s myservice

Step-by-Step Solution

Solution:

Step 1: Identify update parallelism
Update 3 containers at a time means setting --update-parallelism to 3.
Step 2: Set update delay
Wait 5 seconds between batches means --update-delay 5s.
Step 3: Verify command syntax
Command A correctly uses both options with the right values.
Final Answer:
docker service update --image myapp:latest --update-parallelism 3 --update-delay 5s myservice -> Option D
Quick Check:
Parallelism 3 and delay 5s match requirements [OK]

Quick Trick: Use --update-parallelism and --update-delay to control batches [OK]

Common Mistakes:

Mixing up parallelism and delay values
Setting parallelism higher than total replicas
Forgetting to specify update delay

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You have a Docker service with 10 replicas. To perform a rolling update that updates 3 containers at a time and waits 5 seconds between each batch, which command should you use?

Step 1: Identify update parallelism

Step 2: Set update delay

Step 3: Verify command syntax

Final Answer:

Quick Check:

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