If you need parse exactly the same format, as you’ve shown in you question, it’s fairly easy to create something e.g. perl/awk/sed script.

for instance:

################# tst.awk #################
BEGIN {FS = "," }
{
split($1, m, "\ ")
printf "%s", "{ "
printf "%s",$2
printf "%s",$3
printf "%s",$5
printf "%s",$4
printf "reason: %s %s %s %s \"%s\"\n", m[6], m[7], m[8], m[9], m[10]
print " }”

}
#############################################


result:

echo 2018/01/10 06:26:31 [error] 13485#13485: *64285471 limiting connections by zone "rl_conn", client: xx.xx.xx.xx, server: www.xyz.com, request: "GET /api/xyz HTTP/1.1", host: "www.xyz.com" | awk -f /tmp/test.awk
{ client: xx.xx.xx.xx server: www.xyz.com host: www.xyz.com request: GET /api/xyz HTTP/1.1reason: limiting connections by zone "rl_conn"
}


br,
Aziz.





> On 10 Jan 2018, at 14:45, mohit Agrawal <mohit3081989@gmail.com> wrote:
>
> Yeah I have tried grok / regex pattern as well. But not extensive success that I achieved. grok didn't work for me, I tried regex then it was able to segregate time , pid, tid, log_level and message. I also need message break up for above pattern
>
> On 10 January 2018 at 17:12, Aziz Rozyev <arozyev@nginx.com> wrote:
> Hi Mohit,
>
> check the second reply. I’m not sure that there is a conventional pretty printing
> tools for nginx error log.
>
>
> br,
> Aziz.
>
>
>
>
>
> > On 10 Jan 2018, at 14:37, mohit Agrawal <mohit3081989@gmail.com> wrote:
> >
> > Hi Aziz,
> >
> > log_format directive only provides formatting for access log, I am looking to format error.log which doesn't take log_format directive.
> > Above example that I gave is just for nginx error logs.
> >
> > Thanks
> >
> > On 10 January 2018 at 15:26, Aziz Rozyev <arozyev@nginx.com> wrote:
> > btw, after re-reading the your questing, it looks like you need something like logstash grok filter.
> >
> > br,
> > Aziz.
> >
> >
> >
> >
> >
> > > On 10 Jan 2018, at 11:45, mohit Agrawal <mohit3081989@gmail.com> wrote:
> > >
> > > Hi ,
> > >
> > > I am looking to parse nginx error log so as to find out which particular IP is throttled during specific amount of time on connection throttling / request throttling. The format looks like :
> > >
> > > 2018/01/10 06:26:31 [error] 13485#13485: *64285471 limiting connections by zone "rl_conn", client: xx.xx.xx.xx, server: www.xyz.com, request: "GET /api/xyz HTTP/1.1", host: "www.xyz.com"
> > > And the sample that I am looking for is :
> > >
> > > {client: "xx.xx.xx.xx", server: "www.xyz.com", host: "www.xyz.com", "request": "GET /api/xyz HTTP/1.1", reason: "limiting connections by zone "rl_conn""}
> > > so that I can pass it through ELK stack and find out the root ip which is causing issue.
> > >
> > >
> > > --
> > > Mohit Agrawal
> > > _______________________________________________
> > > nginx mailing list
> > > nginx@nginx.org
> > > http://mailman.nginx.org/mailman/listinfo/nginx
> >
> > _______________________________________________
> > nginx mailing list
> > nginx@nginx.org
> > http://mailman.nginx.org/mailman/listinfo/nginx
> >
> >
> >
> > --
> > Mohit Agrawal
>
>
>
>
> --
> Mohit Agrawal

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