[infinispan-issues] [JBoss JIRA] (ISPN-6489) Create (or adjust) autoscaling policies in Openshift

[Sebastian Łaskawiec (JIRA)]

    [ https://issues.jboss.org/browse/ISPN-6489?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13264518#comment-13264518 ] 

Sebastian Łaskawiec commented on ISPN-6489:
-------------------------------------------

[Kubernetes 1.2 adds alpha support for custom metrics|http://kubernetes.io/docs/user-guide/horizontal-pod-autoscaling]. An Autoscaler component can scale out/in based on exposed metrics.

Things to do in order to support this:
- Expose [cAdvisor|https://github.com/google/cadvisor/blob/master/docs/application_metrics.md] configuration. There are at least two options here - colocate them in the same Docker image (a simple Docker Label might be used: {{LABEL io.cadvisor.metric.redis="/var/cadvisor/redis_config.json"}}) or create another container only for exposing the configuration.
- Expose metrics. Even though cAdvisor has been written to be metric format agnostic, it prefers Prometheus metrics. We could use [JMX/Prometheus bridge|https://github.com/prometheus/jmx_exporter].
- [Optional] Add JMX/Prometheus bridge to the library mode.
- Create an autoscaler template and instruction for the users.

> Create (or adjust) autoscaling policies in Openshift
> ----------------------------------------------------
>
>                 Key: ISPN-6489
>                 URL: https://issues.jboss.org/browse/ISPN-6489
>             Project: Infinispan
>          Issue Type: Feature Request
>          Components: Cloud Integrations
>            Reporter: Sebastian Łaskawiec
>            Assignee: Sebastian Łaskawiec
>
> During the conference [Ray|https://twitter.com/saturnism] mentioned that it would be really nice to have Openshift autoscaling policies for Infinispan based on:
> * number of entries (and/or)
> * memory usage
> Some examples might be found in his repos



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