[squid-users] cachemgr.cgi & Internal Error: Missing Template MGR_INDEX

Brendan Kearney bpk678 at gmail.com
Sun Jul 30 15:25:42 UTC 2023 

the cachemgr.cgi i am using is packaged with the squid server i run, all 
from the fedora rpm.  i have two instances, one older and one recently 
upgraded.

you can see in the squid logs all of the requests. cachemgr.cgi/6.1 
always returns a 404.  cachemgr.cgi/4.14 does work and is the instance 
on the older box connecting/talking to the squid instance on the new 
box.  i do get a 404 in the browser.  are the below logs enough or would 
it help if i am to run a packet capture?

[root at server2 ~]# journalctl -rlu squid |grep cachemgr.cgi
Jul 29 10:56:04 server2 (squid-1)[288884]: 
192.168.88.2,server2.bpk2.com,-,29/Jul/2023:10:56:04 
-0400,192.168.88.2,3128,-,"squid",GET,"HTTP/1.0","http://proxy2.bpk2.com:3128/squid-internal-mgr/","cachemgr.cgi/6.1",404,372,-,"TCP_MISS/HIER_NONE","text/html"
Jul 29 10:55:29 server2 (squid-1)[288884]: 
192.168.88.2,server2.bpk2.com,-,29/Jul/2023:10:55:29 
-0400,192.168.88.2,3128,-,"squid",GET,"HTTP/1.0","http://proxy2.bpk2.com:3128/squid-internal-mgr/","cachemgr.cgi/6.1",404,372,-,"TCP_MISS/HIER_NONE","text/html"
Jul 29 10:54:38 server2 (squid-1)[288884]: 
192.168.88.2,192.168.88.2,-,29/Jul/2023:10:54:38 
-0400,192.168.88.2,3128,-,"squid",GET,"HTTP/1.0","http://proxy2.bpk2.com:3128/squid-internal-mgr/","cachemgr.cgi/6.1",404,372,-,"TCP_MISS/HIER_NONE","text/html"
Jul 28 20:02:08 server2 (squid-1)[227457]: 
192.168.88.2,server2.bpk2.com,-,28/Jul/2023:20:02:08 
-0400,192.168.88.2,3128,-,"squid",GET,"HTTP/1.0","http://proxy2.bpk2.com:3128/squid-internal-mgr/","cachemgr.cgi/6.1",404,372,-,"TCP_MISS/HIER_NONE","text/html"
Jul 28 19:55:00 server2 (squid-1)[227457]: 
192.168.88.2,server2.bpk2.com,-,28/Jul/2023:19:55:00 
-0400,192.168.88.2,3128,-,"squid",GET,"HTTP/1.0","http://proxy2.bpk2.com:3128/squid-internal-mgr/","cachemgr.cgi/6.1",404,372,-,"TCP_MISS/HIER_NONE","text/html"
Jul 28 13:13:48 server2 (squid-1)[227457]: 
192.168.88.1,server1.bpk2.com,-,28/Jul/2023:13:13:48 
-0400,192.168.88.2,3128,-,"squid",GET,"HTTP/1.0","cache_object://server2.bpk2.com/config","cachemgr.cgi/4.14",200,18284,-,"TCP_MISS/HIER_NONE","text/plain"
Jul 28 13:13:45 server2 (squid-1)[227457]: 
192.168.88.1,server1.bpk2.com,-,28/Jul/2023:13:13:45 
-0400,192.168.88.2,3128,-,"squid",GET,"HTTP/1.0","cache_object://server2.bpk2.com/","cachemgr.cgi/4.14",200,3817,-,"TCP_MISS/HIER_NONE","text/plain"
Jul 28 13:10:29 server2 (squid-1)[227457]: 
192.168.88.1,server1.bpk2.com,-,28/Jul/2023:13:10:29 
-0400,192.168.88.2,3128,-,"squid",GET,"HTTP/1.0","cache_object://server2.bpk2.com/info","cachemgr.cgi/4.14",200,2571,-,"TCP_MISS/HIER_NONE","text/plain"
Jul 28 13:10:24 server2 (squid-1)[227457]: 
192.168.88.1,server1.bpk2.com,-,28/Jul/2023:13:10:24 
-0400,192.168.88.2,3128,-,"squid",GET,"HTTP/1.0","cache_object://server2.bpk2.com/menu","cachemgr.cgi/4.14",200,3817,-,"TCP_MISS/HIER_NONE","text/plain"
Jul 28 13:10:12 server2 (squid-1)[227457]: 
192.168.88.1,server1.bpk2.com,-,28/Jul/2023:13:10:12 
-0400,192.168.88.2,3128,-,"squid",GET,"HTTP/1.0","cache_object://server2.bpk2.com/idns","cachemgr.cgi/4.14",200,1545,-,"TCP_MISS/HIER_NONE","text/plain"
Jul 28 13:10:10 server2 (squid-1)[227457]: 
192.168.88.1,server1.bpk2.com,-,28/Jul/2023:13:10:10 
-0400,192.168.88.2,3128,-,"squid",GET,"HTTP/1.0","cache_object://server2.bpk2.com/menu","cachemgr.cgi/4.14",200,3817,-,"TCP_MISS/HIER_NONE","text/plain"
Jul 28 13:10:03 server2 (squid-1)[227457]: 
192.168.88.1,server1.bpk2.com,-,28/Jul/2023:13:10:03 
-0400,192.168.88.2,3128,-,"squid",GET,"HTTP/1.0","cache_object://server2.bpk2.com/fqdncache","cachemgr.cgi/4.14",200,1394,-,"TCP_MISS/HIER_NONE","text/plain"
Jul 28 13:10:01 server2 (squid-1)[227457]: 
192.168.88.1,server1.bpk2.com,-,28/Jul/2023:13:10:01 
-0400,192.168.88.2,3128,-,"squid",GET,"HTTP/1.0","cache_object://server2.bpk2.com/menu","cachemgr.cgi/4.14",200,3817,-,"TCP_MISS/HIER_NONE","text/plain"
Jul 28 13:09:54 server2 (squid-1)[227457]: 
192.168.88.1,server1.bpk2.com,-,28/Jul/2023:13:09:54 
-0400,192.168.88.2,3128,-,"squid",GET,"HTTP/1.0","cache_object://server2.bpk2.com/ipcache","cachemgr.cgi/4.14",200,201730,-,"TCP_MISS/HIER_NONE","text/plain"
Jul 28 13:09:50 server2 (squid-1)[227457]: 
192.168.88.1,server1.bpk2.com,-,28/Jul/2023:13:09:50 
-0400,192.168.88.2,3128,-,"squid",GET,"HTTP/1.0","cache_object://server2.bpk2.com/menu","cachemgr.cgi/4.14",200,3817,-,"TCP_MISS/HIER_NONE","text/plain"
Jul 28 13:09:30 server2 (squid-1)[227457]: 
192.168.88.1,server1.bpk2.com,-,28/Jul/2023:13:09:30 
-0400,192.168.88.2,3128,-,"squid",GET,"HTTP/1.0","cache_object://server2.bpk2.com/config","cachemgr.cgi/4.14",200,18284,-,"TCP_MISS/HIER_NONE","text/plain"
Jul 28 13:09:26 server2 (squid-1)[227457]: 
192.168.88.1,server1.bpk2.com,-,28/Jul/2023:13:09:26 
-0400,192.168.88.2,3128,-,"squid",GET,"HTTP/1.0","cache_object://server2.bpk2.com/","cachemgr.cgi/4.14",200,3817,-,"TCP_MISS/HIER_NONE","text/plain"
Jul 28 13:08:44 server2 (squid-1)[227457]: 
192.168.88.2,server2.bpk2.com,-,28/Jul/2023:13:08:44 
-0400,192.168.88.2,3128,-,"squid",GET,"HTTP/1.0","http://proxy2.bpk2.com:3128/squid-internal-mgr/","cachemgr.cgi/6.1",404,372,-,"TCP_MISS/HIER_NONE","text/html"
Jul 28 13:04:46 server2 (squid-1)[227457]: 
192.168.88.2,server2.bpk2.com,-,28/Jul/2023:13:04:46 
-0400,192.168.88.2,3128,-,"squid",GET,"HTTP/1.0","http://proxy2.bpk2.com:3128/squid-internal-mgr/","cachemgr.cgi/6.1",404,372,-,"TCP_MISS/HIER_NONE","text/html"
Jul 28 13:03:30 server2 (squid-1)[227457]: 
192.168.88.2,server2.bpk2.com,-,28/Jul/2023:13:03:30 
-0400,192.168.88.2,3128,-,"squid",GET,"HTTP/1.0","http://proxy2.bpk2.com:3128/squid-internal-mgr/","cachemgr.cgi/6.1",404,372,-,"TCP_MISS/HIER_NONE","text/html"
Jul 28 13:01:02 server2 (squid-1)[227457]: 
192.168.88.2,server2.bpk2.com,-,28/Jul/2023:13:01:02 
-0400,192.168.88.2,3128,-,"squid",GET,"HTTP/1.0","http://proxy2.bpk2.com:3128/squid-internal-mgr/","cachemgr.cgi/6.1",404,372,-,"TCP_MISS/HIER_NONE","text/html"
Jul 28 12:59:15 server2 (squid-1)[227457]: 
192.168.88.2,server2.bpk2.com,-,28/Jul/2023:12:59:15 
-0400,192.168.88.2,3128,-,"squid",GET,"HTTP/1.0","http://proxy2.bpk2.com:3128/squid-internal-mgr/","cachemgr.cgi/6.1",404,372,-,"TCP_MISS/HIER_NONE","text/html"
Jul 28 12:59:11 server2 (squid-1)[227457]: 
192.168.88.2,server2.bpk2.com,-,28/Jul/2023:12:59:11 
-0400,192.168.88.2,3128,-,"squid",GET,"HTTP/1.0","http://proxy2.bpk2.com:3128/squid-internal-mgr/","cachemgr.cgi/6.1",404,372,-,"TCP_MISS/HIER_NONE","text/html"
Jul 28 12:58:27 server2 (squid-1)[227457]: 
192.168.88.2,server2.bpk2.com,-,28/Jul/2023:12:58:27 
-0400,192.168.88.2,3128,-,"squid",GET,"HTTP/1.0","http://proxy2.bpk2.com:3128/squid-internal-mgr/","cachemgr.cgi/6.1",404,372,-,"TCP_MISS/HIER_NONE","text/html"
Jul 28 12:58:14 server2 (squid-1)[227457]: 
192.168.88.2,server2.bpk2.com,-,28/Jul/2023:12:58:14 
-0400,192.168.88.2,3128,-,"squid",GET,"HTTP/1.0","http://proxy2.bpk2.com:3128/squid-internal-mgr/","cachemgr.cgi/6.1",404,372,-,"TCP_MISS/HIER_NONE","text/html"

On 7/29/23 4:01 PM, Alex Rousskov wrote:
> On 7/29/23 12:31, Brendan Kearney wrote:
>> i am not following.
>
> Sorry, I was just gathering evidence and explaining what you saw. I 
> have not confirmed a bug and have not been offering a solution (yet?).
>
>
>> squid 4.14 on fedora 32 does not have the file, nor does it exhibit 
>> the issue.
>
>> squid 6.1 on fedora 38 does not have the file, but does exhibit the 
>> issue.
>
> ... and you do not have a MGR_INDEX file and, presumably, did not have 
> that file before. That piece of information was missing. Now we have 
> it. Let's call that progress, even though it may not look like one :-).
>
> One additional checkbox to tick is to make sure that the cachemgr.cgi 
> script you are using comes from the Squid version you are testing.
>
>
>> what am i missing, and is there a way to provide this functionality 
>> in 6.1?  if an external tool, or different package, is needed what is 
>> that?
>
> cachemgr.cgi is not my area of expertise, but I believe that, bugs 
> notwithstanding, the functionality you want should be available 
> without an external tool.
>
> The next step, AFAICT, is for you to detail:
>
> * what HTTP response cachemgr.cgi script gets from Squid and
> * what HTTP response your browser gets from cachemgr.cgi
>
> According to [2], Squid should send a 404 response to cachemgr.cgi. 
> You may be able to find some Squid response details (e.g., status 
> code) in Squid access.log. If your cachemgr.cgi is sending plain text 
> requests to Squid, you can also capture HTTP traffic to and from 
> cachemgr.cgi using tcpdump, wireshark, or similar tools.
>
> [2] https://github.com/squid-cache/squid/pull/1176#discussion_r1010645870
>
>
> Thank you,
>
> Alex.
>
>
>> On 7/29/23 12:22 PM, Alex Rousskov wrote:
>>> On 7/29/23 11:07, Brendan Kearney wrote:
>>>
>>>> the package installed does not have any file named MGR_INDEX. 
>>>> running "rpm -ql squid |grep -i index" does not return anything. 
>>>> searching in /usr/share/squid for the file does not find it, 
>>>> either. funny that neither the old version of squid, nor the new 
>>>> version of squid have that file at all.
>>>
>>> Yes, the lack of MGR_INDEX file in Squid sources is "by design" of 
>>> that MGR_INDEX feature -- an "external tool" is supposed to provide 
>>> that file in certain cases[1]. Please do not misinterpret my 
>>> statement as defense of the corresponding design decisions or their 
>>> side effects; I am just stating the facts rather than trying to 
>>> justify bad user experience.
>>>
>>> [1] 
>>> https://github.com/squid-cache/squid/pull/1176#discussion_r1010534845
>>>
>>>
>>> Alex.
>>>
>>>
>>>> @amos,
>>>>
>>>> i ran firefox with developer tools open, and browsed to the 
>>>> cachemgr URL, and reproduced the issue.  the traffic is not being 
>>>> proxied through squid, and is making the requests directly.  i am 
>>>> not sure if that is what you mean.  i saved the session as a HAR 
>>>> file, if that helps.
>>>>
>>>> thank you,
>>>>
>>>> brendan
>>>>
>>>> On 7/29/23 1:26 AM, Amos Jeffries wrote:
>>>>> On 29/07/23 14:42, Alex Rousskov wrote:
>>>>>> On 7/28/23 20:08, Brendan Kearney wrote:
>>>>>>
>>>>>>> i am running squid 6.1 on fedora 38, and cannot get the 
>>>>>>> cachemgr.cgi working on this box.  I am getting the error:
>>>>>>>
>>>>>>> Internal Error: Missing Template MGR_INDEX
>>>>>>>
>>>>>>> when i try to connect using the cache manager interface.
>>>>>>
>>>>>
>>>>> That is the expected output when you are trying to access the 
>>>>> manager interface directly from Squid. **Instead** of via the 
>>>>> cachemgr.cgi.
>>>>>
>>>>> If you want to try the new manager interface I have a prototype 
>>>>> javascript tool available at <https://github.com/yadij/cachemgr.js/>.
>>>>>
>>>>>
>>>>> Amos
>>>>> _______________________________________________
>>>>> squid-users mailing list
>>>>> squid-users at lists.squid-cache.org
>>>>> http://lists.squid-cache.org/listinfo/squid-users
>>>> _______________________________________________
>>>> squid-users mailing list
>>>> squid-users at lists.squid-cache.org
>>>> http://lists.squid-cache.org/listinfo/squid-users
>>>
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>>> http://lists.squid-cache.org/listinfo/squid-users
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>
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