[LON-CAPA-admin] Can't access user status pages

[Stuart Raeburn]

Bob,

>
> there isn't a 'en-US' in one of the fields.  How does that get filled in?
>

Prior to LON-CAPA 2.4 (June 2007) domain defaults such as default  
authentication mechanism and parameter, and also default language  
(e.g., en-US) were extracted from domain.tab, and the entry would have  
been filled in on the command line using a text editor (e.g., vim).

Starting with 2.4, a configuration.db GDBM file was added on a  
domain's primary library server as the place to store domain defaults  
(and other configuration information) for all of a domain's servers. A  
web interface was also implemented to allow a domain coordinator to  
set these domain defaults (and other settings) without the need for  
command line access.

The binghamton domain joined the LON-CAPA network after June 2007, so  
the web interface used for domain configuration has always been  
available to you, via Main Menu > Set domain configuration, and,  
specifically, the "Default  
authentication/language/timezone/portal/types" item to choose a  
default language from those available.

Accordingly, it is not a problem to omit en-US from the  
/home/httpd/lonTabs/domain.tab files on your servers/VMs, so the entry  
will simply be:

binghamton:Binghamton University:::::::binghamtonl1

(The line I included in my previous post was copied from the entry I  
have for the binghamton domain in the "authoritative" dns_domain.tab  
file available from the LON-CAPA "DNS" servers at MSU, Illinois, and  
Simon Fraser (via /adm/dns/domain ).


Stuart Raeburn
LON-CAPA Academic Consortium


Quoting Bob Gonzales <rgonzal at binghamton.edu>:

> Stuart,
>
> There was a typo in /home/httpd/lonTabs/domain.tab that I missed.  Things
> look proper again, and I can access the user status pages.
>
> One other note, all of my /home/httpd/lonTabs look like this:
>
> # domain:Domain Name:auth mechanism:auth
> parameters:Language:City:Geo1:Geo2:main library
> binghamton:Binghamton University:::::::binghamtonl1
>
> there isn't a 'en-US' in one of the fields.  How does that get filled in?
>
> Once again, thank you for the help.
>
> Bob
>
> On Mon, Feb 22, 2016 at 2:09 PM, Stuart Raeburn <raeburn at msu.edu> wrote:
>
>> Bob,
>>
>>
>>> I still get cannot access the user status pages on
>>> loncapa6.chem.binghamton.edu while I can access all of the others.
>>>
>>>
>> Comparing http://loncapa6.chem.binghamton.edu/adm/login with
>> http://loncapa5.chem.binghamton.edu/adm/login it is evident that loncapa6
>> is unable to retrieve domain configuration information from the binghamton
>> domain's primary library server.
>>
>> You'll see that loncapa6 has no custom logo at bottom right of the log-in
>> page, but does include a link to "Course/Community Catalog" as the fourth
>> item below the Log in button (it is not shown on the log-in pages for your
>> other servers).
>>
>> Can you check if there is a typo in: /home/httpd/lonTabs/domain.tab on
>> loncapa6.
>> That file should contain:
>>
>> binghamton:Binghamton University:::en-US::::binghamtonl1
>>
>> (The last item, after the eighth colon, is the lonHostID of the primary
>> library server).
>>
>> You might also look in /home/httpd/perl/logs/lonnet.log on loncapa6 for
>> this message: get_dom failed - no homeserver and/or domain (binghamton)
>>
>>
>>
>> Stuart Raeburn
>> LON-CAPA Academic Consortium
>>
>>
>> Quoting Bob Gonzales <rgonzal at binghamton.edu>:
>>
>> Stuart,
>>>
>>> I still get cannot access the user status pages on
>>> loncapa6.chem.binghamton.edu while I can access all of the others.
>>>
>>> I dumped memcache and compared the following entries to those on another
>>> server and they look the same.
>>>
>>> dns%3a%2fadm%2fdns%2fdomain
>>> dns%3a%2fadm%2fdns%2fhosts
>>> iphost%3aiphost
>>>
>>> There are no entries in lonmemcached_errors.
>>>
>>> I killed and restarted lonmemcached.  No changes, the Specific ip's' field
>>> on the   is still blank on the 'Display/Edit Settings' page is still
>>> blank.
>>>
>>> Something that is different about this server, compared to my other ones,
>>> is that I had a disk failure and I reinstalled centos and loncapa.  This
>>> machine is at the same level of centos, with the latest updates, just as
>>> my
>>> other servers are.  The loncapa string on the login page for all of the
>>> servers is 2.11.1-2015053018.
>>>
>>> One other difference between this machine and the others, related to the
>>> re-install, is that the library moved to another subnet back in January,
>>> and the reinstall on loncapa6 happened in February.  I don't know what
>>> difference this might make but I thought I'd include the info.
>>>
>>> Bob
>>>
>>>
>>>
>>>
>>>
>>> On Sun, Feb 21, 2016 at 11:28 AM, Stuart Raeburn <raeburn at msu.edu> wrote:
>>>
>>> Bob,
>>>>
>>>> I expect expiration of caches will have fixed this issue on binghamtona6
>>>> by now, but if not ...
>>>>
>>>> ... The page it returns has the text 'Your
>>>>
>>>>> cookie information is incorrect.' in the body of the page.
>>>>>
>>>>>
>>>> You will see that message if you attempt to access the user status page
>>>> outside of a authenticated session (e.g., using wget) from an IP address
>>>> that either (a) does not belong to one of your domain's LON-CAPA servers,
>>>> or (b) is not one of the IP addresses for which access to the user status
>>>> page has been specified in the domain configuration for your domain.
>>>>
>>>>
>>>> If I log onto loncapa6 and go to the  'Display/Edit Settings' page, the
>>>>> 'Specific ip's' field is blank. It is not blank if I do that on the
>>>>> other
>>>>> servers, it has the correct address in it.
>>>>>
>>>>>
>>>>> That indicates that on binghamtona6 the current domain configuration was
>>>> not retrieved from the primary library server in in your domain (i.e.,
>>>> binghamtonl1).
>>>>
>>>>
>>>>        An error occurred saving access settings for server status pages:
>>>>> no_such_host.
>>>>>
>>>>>
>>>>> That error message tells me that when binghamtona6 attempted to save the
>>>> domain configuration settings for the binghamton domain to the primary
>>>> library server in your domain (i.e., binghamtonl1), it failed to obtain a
>>>> hostname for that server. That is consistent with the failure to retrieve
>>>> the domain configuration information originally.
>>>>
>>>> In the case of failure to retrieve a hostname, given a lonhostID, I would
>>>> recommend checking that the information cached in memcache on
>>>> binghamtona6
>>>> for the items:
>>>>
>>>> dns%3a%2fadm%2fdns%2fdomain
>>>> dns%3a%2fadm%2fdns%2fhosts
>>>> iphost%3aiphost
>>>>
>>>> look correct.
>>>>
>>>> My 2/9/2015 post to this mailing list included a perl script which can be
>>>> run to dump the contents of memcached. See:
>>>>
>>>> http://mail.lon-capa.org/pipermail/lon-capa-admin/2015-February/003005.html
>>>> .
>>>>
>>>> If it's not correct you might look in
>>>> /home/httpd/perl/logs/lonmemcached_errors on binghamtona6 to see if
>>>> anything is logged there.
>>>>
>>>> You can restart memcached on binghamtona6, either by restarting all the
>>>> LON-CAPA daemons using /etc/init.d/loncontrol restart, or by restarting
>>>> just  memcached, by retrieving the process ID (pid), killing that pid,
>>>> and
>>>> then starting loncontrol, i.e.,
>>>>
>>>> cat /home/httpd/perl/logs/lonmemcached.pid
>>>> kill <pid>
>>>> /etc/init.d/loncontrol start
>>>>
>>>>
>>>> Stuart Raeburn
>>>> LON-CAPA Academic Consortium
>>>>
>>>>
>>>>
>>>> Quoting Bob Gonzales <rgonzal at binghamton.edu>:
>>>>
>>>> I can't access the user status page on one of my servers from a remote
>>>>
>>>>> machine.  The server that  is not allowing access is
>>>>> loncapa6.chem.binghamton.edu.  The page it returns has the text 'Your
>>>>> cookie information is incorrect.' in the body of the page.   I can
>>>>> access
>>>>> it correctly from the command line on loncapa6.
>>>>>
>>>>> I can access all of my other server's user status page.
>>>>>
>>>>> The remote machine's that is requesting the pages was setup via the gui
>>>>> 'Display/Edit Settings' page.
>>>>>
>>>>> If I log onto loncapa6 and go to the  'Display/Edit Settings' page, the
>>>>> 'Specific ip's' field is blank.  It is not blank if I do that on the
>>>>> other
>>>>> servers, it has the correct address in it.  From loncapa6, if I try to
>>>>> set
>>>>> it to any value then I get the following message:
>>>>>
>>>>>        An error occurred saving access settings for server status pages:
>>>>> no_such_host.
>>>>>
>>>>> loncapa6 seems to be working OK.  I can log on an choose various roles
>>>>> and
>>>>> do normal things.
>>>>>
>>>>> The system files /etc/hosts, and /etc/resolv.conf match up with the
>>>>> other
>>>>> servers.  The files in /home/httpd/lonTabs also seem consistent with the
>>>>> same on the other access servers.
>>>>>
>>>>> Anyone have any suggestions on what else I can check?
>>>>>
>>>>> Thanks,
>>>>> Bob Gonzales
>>>>> Binghamton University
>>>>> Chemistry Dept
>>>>>
>>>>>
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