Convert Different timezones syslog time to datetime format

Elastic Stack Logstash
1

I have following timestamp with different timezones in the log messages.
Aug 11 03:31:12.942 UTC
Aug 11 04:31:12.819 GMT
Aug 10 22:31:51.207 CST
Aug 10 04:31:38.897 PAC
Aug 10 22:31:13.210 CDT
Aug 11 03:31:13.048 PST
Aug 10 23:31:12.940 EST
Aug 10 23:31:12.753 EDT

Can someone help me ,how to convert them to datetime format (yyyy-MM-dd HH:mm:ss)?

Thanks in advance,
Pavani

2

You can parse those using a date filter.

 date { match => [ "someField", "MMM dd HH:mm:ss.SSS ZZZ" ] }

You will need to modify the timezones to unambiguous values before calling the date filter, which you can do using mutate+gsub. For example,

mutate { gsub => [ "someField", "CDT", "CST6CDT", "somefield", "EST", "EST5EDT" ] }

(or "Cuba/Havana" if CDT refers to Cuba daylight time).

Also, if your dates do not have a year in them then logstash will guess, and sometimes it will guess wrong. See issues 137, 100, and the long discussion of 51.

3

Thanks @Badger,
But, I have total eight different timezones

Aug 11 03:31:12.942 UTC
Aug 11 04:31:12.819 GMT
Aug 10 22:31:51.207 CST
Aug 10 04:31:38.897 PAC
Aug 10 22:31:13.210 CDT
Aug 11 03:31:13.048 PST
Aug 10 23:31:12.940 EST
Aug 10 23:31:12.753 EDT

for PST,CST,PAC timezones what is the unambigous values , because the three timezones gives "_dateparsefailure" tag, Please help me!

4

Given that they are ambiguous I cannot say how you should replace them, but the list of unambiguous timezones is here.