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https://issues.apache.org/jira/browse/MESOS-4007?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yong Qiao Wang updated MESOS-4007:
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Description:
To consider the Mesos master recovery and failover case, Mesos master needs to
persist the roles and weights information in registry:
- In the first boot, the first leading master initialize the replicated log
with the roles/weights specified by command-line flags(--roles and --weights).
The flags values are only useful to bootstrap the cluster, after which point
the registry becomes the source of truth.
- At runtime, the replicated log can only be updated to add/remove/update
entries by the operator REST API.
- For Mesos master restart/failover case, if the replicated log for
roles/weights has exist, and then it prefers to use the registry values and
ignore the flags (--roles/--weights), and also log a warning in Mesos master
that the flags values are being ignored.
- For the future works, we can educate end users to create the replicated log
to initialize the supported roles/weights before Mesos cluster bootstrap, and
reset roles/weights configurations by update the replicated log.
was:Persist role information to registry across master recovery/failover.
> Persist role information to registry
> ------------------------------------
>
> Key: MESOS-4007
> URL: https://issues.apache.org/jira/browse/MESOS-4007
> Project: Mesos
> Issue Type: Task
> Reporter: Yong Qiao Wang
> Assignee: Yong Qiao Wang
>
> To consider the Mesos master recovery and failover case, Mesos master needs
> to persist the roles and weights information in registry:
> - In the first boot, the first leading master initialize the replicated log
> with the roles/weights specified by command-line flags(--roles and
> --weights). The flags values are only useful to bootstrap the cluster, after
> which point the registry becomes the source of truth.
> - At runtime, the replicated log can only be updated to add/remove/update
> entries by the operator REST API.
> - For Mesos master restart/failover case, if the replicated log for
> roles/weights has exist, and then it prefers to use the registry values and
> ignore the flags (--roles/--weights), and also log a warning in Mesos master
> that the flags values are being ignored.
> - For the future works, we can educate end users to create the replicated log
> to initialize the supported roles/weights before Mesos cluster bootstrap, and
> reset roles/weights configurations by update the replicated log.
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