[Solved] In a production Docker Swarm, how can you ensure your service stays running even if a node fails? — Ans: Set the service replicas to more than one so tasks run on multiple nodes | Docker

Docker - Production Patterns

In a production Docker Swarm, how can you ensure your service stays running even if a node fails?

AUse 'docker container run' repeatedly on the same node

BRun the service with a single replica on one node only

CSet the service replicas to more than one so tasks run on multiple nodes

DDisable swarm mode to avoid node failures

Step-by-Step Solution

Solution:

Step 1: Understand high availability in swarm
Running multiple replicas spreads tasks across nodes, so if one node fails, others keep running the service.
Step 2: Evaluate options
Single replica or running containers manually does not provide failover. Disabling swarm removes orchestration benefits.
Final Answer:
Set the service replicas to more than one so tasks run on multiple nodes -> Option C
Quick Check:
Multiple replicas = high availability [OK]

Quick Trick: Use multiple replicas for failover in swarm [OK]

Common Mistakes:

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