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From Christopher Schultz <ch...@christopherschultz.net>
Subject Re: [users@httpd] find IP and PORT in use by Apache
Date Tue, 21 Jun 2016 21:52:53 GMT
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Mahmood,

On 6/21/16 5:43 PM, Christopher Schultz wrote:
> Mahmood,
> 
> On 6/21/16 2:54 PM, Mahmood N wrote:
>> You know, the problem is that compute nodes in Rocks
>> distribution use Apache web server to locate the install image.
>> Currently, the compute node, says Unable to retrieve 
>> http://10.10.10.1/install/rocks-dist/x86_64/images/install.img 
>> <http://10.10.10.1/install/rocks-dist/x86_64/images/install.img>
> 
>> The guys on Rocks mailing list suggested that
> 
> 
> 
>> the root of webserver tree is: /var/www/html the install 
>> subdirectory is soft-linked to /export/rocks/install if the 
>> webserver can't find the install.img, then your distro is likely
>>  corrupted. To fix that problem: # cd /export/rocks/install;
>> rocks create distro If you have somehow changed the configuration
>> of the webserver on your frontend, you need to figure out what
>> was changed.
> 
> 
> 
>> However, the soft link is present
> 
>> root@cluster:~# ls -l /var/www/html/ total 36 lrwxrwxrwx  1 root 
>> root   30 Apr 29  2014 blast -> /opt/bio/ncbi/network/wwwblast 
>> drwxr-xr-x  2 root root 4096 May  2 15:46 download drwxr-xr-x 17 
>> root root 4096 Apr 29  2014 ganglia drwxr-xr-x  4 root root 4096 
>> Apr 29  2014 gromacs drwxr-xr-x  2 root root 4096 Apr 29  2014 
>> images -rw-r--r--  1 root root    0 May  1 14:28 index.h
>> lrwxrwxrwx 1 root root   21 Apr 29  2014 install ->
>> /export/rocks/install drwxr-xr-x  2 root root 4096 Apr 29  2014
>> misc drwxr-xr-x  9 root root 4096 Apr 29  2014 phpsysinfo
>> -rw-r--r--  1 root root    0 Apr 29  2014 robots.txt drwxr-xr-x
>> 14 root root 4096 Apr 29  2014 roll-documentation drwxr-xr-x  3
>> root root 4096 Apr 29  2014 rss drwxr-xr-x 24 root root 4096 Jun
>> 1 03:09 tripwire
> 
>> root@cluster:~# ls -l /export/rocks/install total 20 drwxr-xr-x
>> 3 root root 4096 Apr 29  2014 contrib drwxr-xr-x  3 root root
>> 4096 Apr 29  2014 rocks-dist drwxr-xr-x 17 root root 4096 Apr 29
>> 2014 rolls drwxr-xr-x  2 root root 4096 Apr 29  2014 sbin
>> drwxr-xr-x  3 root root 4096 Apr 29  2014 site-profiles
> 
> 
> 
>> The front end (the head node) has not been rebooted for more
>> than 2 months, and I have some how configured the httpd for some
>> tests!
> 
>> Now I see that something went wrong.
> 
>> Do you have any idea?
> 
> $ ls -l /var/www/html/install/rocks-dist/x86_64/images/install.img
> 
> If there is a file there, check:
> 
> 1. Directory read-permissions for all directories in the above
> path (ensure that the httpd user/group can execute)
> 
> 2. Symlinks are allowed in /var/www/html (this will be an
> "Options" directive in httpd.conf)

Also, log files are good things to look at.

- -chris
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