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From "Yang Wang (Jira)" <j...@apache.org>
Subject [jira] [Updated] (FLINK-12884) Implement HighAvailabilityService based on native k8s APIs
Date Thu, 24 Oct 2019 13:45:00 GMT

     [ https://issues.apache.org/jira/browse/FLINK-12884?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Yang Wang updated FLINK-12884:
------------------------------
        Parent: FLINK-14460
    Issue Type: Sub-task  (was: Task)

> Implement HighAvailabilityService based on native k8s APIs
> ----------------------------------------------------------
>
>                 Key: FLINK-12884
>                 URL: https://issues.apache.org/jira/browse/FLINK-12884
>             Project: Flink
>          Issue Type: Sub-task
>          Components: Runtime / Coordination
>            Reporter: MalcolmSanders
>            Assignee: MalcolmSanders
>            Priority: Major
>
> Currently flink only supports HighAvailabilityService using zookeeper. As a result, it
requires a zookeeper cluster to be deployed on k8s cluster if our customers needs high availability
for flink. If we support HighAvailabilityService based on native k8s APIs, it will save the
efforts of zookeeper deployment as well as the resources used by zookeeper cluster. It might
be especially helpful for customers who run small-scale k8s clusters so that flink HighAvailabilityService
may not cause too much overhead on k8s clusters.
> Previously [FLINK-11105|https://issues.apache.org/jira/browse/FLINK-11105] has proposed
a HighAvailabilityService using etcd. As [~NathanHowell] suggested in FLINK-11105, since k8s
doesn't expose its own etcd cluster by design (see [Securing etcd clusters|https://kubernetes.io/docs/tasks/administer-cluster/configure-upgrade-etcd/#securing-etcd-clusters]),
it also requires the deployment of etcd cluster if flink uses etcd to achieve HA.



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