how can I read old varnish logs?

[John Cherouvim]

 > What is the output of `file some_extracted_file`?

It's "data".

The output of head looks like this:

 > )(▒86 boot.www0P)(▒Beresp: 1503698757.375353 119.998656 
119.998480-P)(▒Error: 1503698757.375362 119.998665 0.000009 
))(▒HTTP/1.1*)(▒503+)(▒Service Unavailable+)(▒Backend fetch 
failed$,)(▒Date: Fri, 25 Aug 2017 22:05:57 GMT,)(▒Server: 
Varnish<)(▒BACKEND_ERROR',)(▒Content-Type: text/html; 
charset=utf-8,)(▒Retry-After: >)(▒deliverO)(▒malloc Transient 
1)(▒HTTP/1.12)(▒5033)(▒Backend fetch failed$4)(▒Date: Fri, 25 Aug 2017 
22:05:57 GMT4)(▒Server: Varnish'4)(▒Content-Typ)(▒284S)(▒292 0 292 0 0 
0M)(▒L)(@req 2631964 rxreq+P)(@Start: 1503698637.376097 0.000000 
0.000000)P)(@Req: 1503698637.376097 0.000000 0.000000?)(@54.162.61.100 
34377)(@GETg)(@/en/ )(@HTTP/1.1)(@Connection: closeG)(@User-Agent: 
Flamingo_SearchEngine (+http://www.flamingosearch.com/bot))(@Host: 
www.example.com)(@X-Forwarded-For: 
54.111.111.111<)(@RECV>)(@hash<)(@HASH>)(@lookup<)(@MISS>)(@fetchK)(@bereq 
2631966 fetch/P)(@Fetch: 1503698757.439626 120.063529 120.063529 
)(@HTTP/1.1)(@503Backend fetch failed$)(@Date: Fri, 25 Aug 2017 22:05:57 
GMT)(@Server: Varnish')(@Content-Type: text/html; 
charset=utf-8)(@Retry-After: 5)(@X-Varnish: 2631965)(@Age: 0)(@Via: 1.1 
varnish-v<)(@DELIVER)(@Via: 1.1 varnish-v>)(@deliver/P)(@Process: 
1503698757.439677 120.063580 0.000051)(@Content-Length: 284...



Dridi Boukelmoune wrote:
> On Mon, Aug 28, 2017 at 9:21 AM, John Cherouvim <jc at eworx.gr> wrote:
>   
>> In /var/log/varnish/ I have some old varnish logs, produced by varnishlog
>> which, due to logrotated, are now in gz format:
>>
>>     
>>> -rw-r--r--  1 varnishlog varnish 143068514 Aug 10 23:59
>>> varnish.log.2017-08-10.gz
>>> -rw-r--r--  1 varnishlog varnish 156373518 Aug 11 23:59
>>> varnish.log.2017-08-11.gz
>>> -rw-r--r--  1 varnishlog varnish 134255825 Aug 12 23:59
>>> varnish.log.2017-08-12.gz
>>> -rw-r--r--  1 varnishlog varnish 156992529 Aug 13 23:59
>>> varnish.log.2017-08-13.gz
>>> -rw-r--r--  1 varnishlog varnish 176751837 Aug 14 23:59
>>> varnish.log.2017-08-14.gz
>>> -rw-r--r--  1 varnishlog varnish 155948012 Aug 16 00:01
>>> varnish.log.2017-08-15.gz
>>> -rw-r--r--  1 varnishlog varnish 169977134 Aug 17 00:01
>>> varnish.log.2017-08-16.gz
>>>       
>> I've extracted those in another location and tried to view them via
>> head/more but they look binary.
>>
>> So I then tried opening them with varnishlog using either of the following
>> parameters:
>>
>>     
>>> [-N filename]             VSM filename
>>> [-r filename]             Binary file input
>>>       
>> But that didn't work giving me:
>>
>>     
>>> Can't open log - retrying for 5 seconds
>>>       
>> and:
>>
>>     
>>> Can't open log file (Not a VSL file:
>>>       
>> Any idea on how can I inspect those historical logs from varnish?
>>     
>
> What is the output of `file some_extracted_file`?
>
> They are probably ascii dump of the logs if varnishlog is complaining.
>
> Dridi
>
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