Note:
This topic has been translated from a Chinese forum by GPT and might contain errors.
Original topic: v5.3如何在线升级
Old cluster v5.3.0, upgrade target 6.5.5
I followed the documentation for an online upgrade,
- Shut down TiFlash
- tiup cluster upgrade xxx v6.5.5
- The cluster automatically brought TiFlash back up, shut down TiFlash again
- tiup cluster upgrade xxx v6.5.5 --offline, prompted Error: cluster is running and cannot be upgraded offline
Why is my experience different from what the documentation says?
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TiFlash needs to be turned off first.
I first shut down TiFlash, with a total of 3 nodes. After executing the upgrade, the cluster automatically brought up one TiFlash node, but the other 2 TiFlash nodes failed to start. How should I proceed with the upgrade in this situation?
Could you provide a more detailed error log?
There is no exception, but did I make a mistake in the process?
After shutting down TiFlash, should I upgrade TiFlash using tiup cluster upgrade xxx --offline while other PD, KV, and server components are still running? When I executed it, it reported that the cluster is running and did not allow offline mode.
I found the reason. When using tiup stop tiflash, it shows “down”, but on the server, systemctl status tiflash-9000 shows “running”. Manually stopping it works.
Check the logs to see why it didn’t stop normally; this is also a way to identify the issue.
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