You scaled a service to 4 replicas but one replica keeps restarting due to an error. How can you update the service to limit replicas to only healthy containers?

hard📝 Workflow Q9 of 15

Docker - Swarm

ARemove the service and recreate it with 3 replicas

BManually stop the failing container and scale down to 3 replicas

CUse health checks and update the service to restart only healthy replicas

DUse 'docker service scale servicename=3' to ignore unhealthy replicas

Step-by-Step Solution

Solution:

Step 1: Understand health checks in Docker services
Health checks allow Docker to monitor container health and restart unhealthy ones.
Step 2: Use health checks to manage replicas
Updating the service with health checks ensures only healthy replicas run and unhealthy ones restart automatically.
Final Answer:
Use health checks and update the service to restart only healthy replicas -> Option C
Quick Check:
Health checks manage replica health automatically [OK]

Quick Trick: Use health checks to manage replica health [OK]

Common Mistakes:

Manually stopping containers instead of using health checks
Removing and recreating service unnecessarily
Scaling down without fixing health issues

Master "Swarm" in Docker

9 interactive learning modes - each teaches the same concept differently

Learn Why Deep Visual Try Challenge Project Recall Time

Want More Practice?

15+ quiz questions · All difficulty levels · Free

Free Signup - Practice All Questions

More Docker Quizzes

You scaled a service to 4 replicas but one replica keeps restarting due to an error. How can you update the service to limit replicas to only healthy containers?

Step 1: Understand health checks in Docker services

Step 2: Use health checks to manage replicas

Final Answer:

Quick Check:

Want More Practice?