The database file size of etcd has exceeded the configured quota

[CCTV-six]

Bug report criteria

• This bug report is not security related, security issues should be disclosed privately via etcd maintainers.
• This is not a support request or question, support requests or questions should be raised in the etcd discussion forums.
• You have read the etcd bug reporting guidelines.
• Existing open issues along with etcd frequently asked questions have been checked and this is not a duplicate.

What happened?

Etcd error: etcdserver: mvcc: database space exceeded

What did you expect to happen?

The cluster should be able to continue running normally and accept new write requests

How can we reproduce it (as minimally and precisely as possible)?

The ETCD cluster will become read-only and cannot accept new write requests.
The error "etcdserver: mvcc: database space exceeded" appears in the log of etcd.

Anything else we need to know?

No response

Etcd version (please run commands below)

none

Etcd configuration (command line flags or environment variables)

No response

Etcd debug information (please run commands below, feel free to obfuscate the IP address or FQDN in the output)

No response

Relevant log output

No response

[ahrtr]

Please read https://etcd.io/blog/2023/how_to_debug_large_db_size_issue/

[tjungblu]

What's the bug here?

FYI: you can also turn it off entirely with:

--quota-backend-bytes=-1