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The DevOps 2.2 Toolkit
book

The DevOps 2.2 Toolkit

by Viktor Farcic
March 2018
Intermediate to advanced content levelIntermediate to advanced
360 pages
7h 52m
English
Packt Publishing
Content preview from The DevOps 2.2 Toolkit

Persisting state

What shall we do with the stateful services inside our cluster? If any of them fails and Swarm reschedules it, the state will be lost. Even if impossible happens and none of the replicas of the service ever fail, sooner or later we'll have to upgrade the cluster. That means that existing nodes will be replaced with new images and Swarm will have to reschedule your services to the new nodes. In other words, services will fail or be rescheduled, and we might need to persist state when they are stateful.

Let us go through each of the stateful services we're currently running inside our cluster.

The obvious case of stateful services is databases. We are running MongoDB. Should we persist its state? Many would answer positively ...

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Publisher Resources

ISBN: 9781788991278Supplemental Content