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feat: introduce leader and standby status for meta #6752

Closed
Tracked by #5943
yezizp2012 opened this issue Dec 6, 2022 · 1 comment
Closed
Tracked by #5943

feat: introduce leader and standby status for meta #6752

yezizp2012 opened this issue Dec 6, 2022 · 1 comment
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@CAJan93
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release-0.1.15

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@yezizp2012
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yezizp2012 commented Dec 6, 2022 •
edited by CAJan93
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Is your feature request related to a problem? Please describe.

when Meta starts, it should participate in leader election. We need a status leader or follower for meta:

  1. leader: initializes all managers with memory cache, starts related RPC services and sub-tasks.
  2. follower: keep participating in election, should only starts a etcd member PRC service only.
@github-actions github-actions bot added this to the release-0.1.15 milestone Dec 6, 2022
@yezizp2012 yezizp2012 mentioned this issue Dec 6, 2022
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CAJan93 commented Dec 7, 2022 •
edited by yezizp2012
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As discussed we I will try to implement the following features for this issue having the following limitations:

Features:

  • All nodes will participate in elections
  • Nodes know if they are leaders or followers
  • Nodes will display if they are leaders or followers in the logs
  • Followers start the health service, not initialized any managers in meta
  • Leaders start all services

Limitations:

  • Clients cannot handle meta failover
  • A meta follower will never start leader services once it becomes leader
  • No fencing mechanism
  • Followers do NOT respond to clients who the current leader is

@CAJan93 CAJan93 mentioned this issue Dec 7, 2022
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mergify bot pushed a commit that referenced this issue Dec 16, 2022
@CAJan93
feat(meta): start follower svc if follower node (#6792)
9c9075b 
#6752

- [x] I have written necessary rustdoc comments
- [x] I have added necessary unit tests and integration tests
- [x] All checks passed in `./risedev check` (or alias, `./risedev c`)


Approved-By: yezizp2012

Co-Authored-By: CAJan93 <[email protected]>
@CAJan93 CAJan93 closed this as completed Dec 16, 2022
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