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From Denis Magda <dma...@apache.org>
Subject Re: Ignite Persistence on Kubernetes.
Date Wed, 30 Aug 2017 03:42:52 GMT
I wouldn’t say that distributed and relational disk-based databases are not suited for Kubernetes.
For instance, Cassandra [1] and MongoDB [2] are supported via the mentioned StatefulSets.
Current Ignite integration doesn’t tap into the StatefulSets. Once it’s done Ignite persistence
can be easily enabled in Kubernetes.

Takumi, what’s your use case? 

[1] https://kubernetes.io/docs/tutorials/stateful-application/cassandra/ <https://kubernetes.io/docs/tutorials/stateful-application/cassandra/>
[2] http://blog.kubernetes.io/2017/01/running-mongodb-on-kubernetes-with-statefulsets.html


> On Aug 29, 2017, at 9:40 AM, ilya.kasnacheev <ilya.kasnacheev@gmail.com> wrote:
> Hello takumi,
> There's a walk-through on deployment in Kubernetes:
> https://apacheignite.readme.io/docs/kubernetes-deployment
> You would probably want to use StatefulSets for persistence-enabled Ignite:
> https://kubernetes.io/docs/concepts/workloads/controllers/statefulset/
> "Manage the deployment and scaling of a set of Pods, and provide guarantees
> about ordering. They do so by maintaining a unique, sticky identity for each
> of their Pods.
> Like Deployments, StatefulSets manage Pods that are based on an identical
> container spec. However, although their specs are the same, the Pods in a
> StatefulSet are not interchangeable. Each Pod has a persistent identifier
> that it maintains across any rescheduling."
> And I think that Ignite instance will know what data it holds even if its IP
> addess change between runs.
> Be wary that there are a number of articles against keeping databases in
> Docker containers:
> https://www.percona.com/blog/2016/11/16/is-docker-for-your-database/
> https://myopsblog.wordpress.com/2017/02/06/why-databases-is-not-for-containers/
> and Ignite with Persistence is basically a database, so be warned.
> -- 
> Ilya
> --
> View this message in context: http://apache-ignite-users.70518.x6.nabble.com/Ignite-Persistence-on-Kubernetes-tp16396p16512.html
> Sent from the Apache Ignite Users mailing list archive at Nabble.com.

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