Grok formatting for a custom timestamp

Question

[04-21 12:57:04]

this is the timestamp generated by python written logs. I hav tried

SYSLOGTIMESTAMP, DATESTAMP_EVENTLOG, DATESTAMP_RFC2822,TIMESTAMP_ISO8601

and many more. Can anyone please provide the correct grok format for this. If not possible how can i use this as a timestamp

Answer 1

You can try these Groks:

\[(?<timestamp>%{MONTHNUM}-%{MONTHDAY} %{TIME})\]

or

\[(?<timestamp>[^\]]+)\]