Question

Apache2 start up error

Asked by: gpabst

In trying to install the open source library system Evergreen from open-ils.org, I have the following error when starting apache:

apache2: Could not reliably determine the server's fully qualified domain name, using 127.0.0.1 for ServerName
[Wed Oct 03 10:25:09 2007] [warn] NameVirtualHost *:80 has no VirtualHosts
(98)Address already in use: make_sock: could not bind to address [::]:80
(98)Address already in use: make_sock: could not bind to address 0.0.0.0:80
no listening sockets available, shutting down
Unable to open logs                                                       [ !! ]


I am running Gentoo linux and the configuration files for the virtual hosts are here:
http://open-ils.org/dokuwiki/lib/exe/fetch.php?id=installing_prerequisites_on_gentoo&cache=cache&media=gentoo:eg.conf.txt
http://open-ils.org/dokuwiki/lib/exe/fetch.php?id=installing_prerequisites_on_gentoo&cache=cache&media=gentoo:eg_vhost.conf.txt

Netstat reveals that there is no process listening on port 80, so it does not make sense to me that it cannot bind to the address. What are the possible causes of not being able to open the log files?

I am hoping that this is a relatively common error that can be easily fixed, if you need all of the configuration files I would be happy to provide the contents of /etc/apache2

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Asked On
2007-10-03 at 11:30:13ID22870117
Tags

could

,

determine

,

reliably

,

apache2

Topic

Apache Web Server

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Answers

 

by: ravenplPosted on 2007-10-03 at 12:24:58ID: 20009272

It looks like You are not running it as root, or if selinux is in use, it's not configured for apache.

 

by: gpabstPosted on 2007-10-03 at 12:32:25ID: 20009340

Thanks for the reply.

Reply I am running as root, can you explain further what you mean by "if selinux is in use, its not configured for apache"?

If you would like the ssh details to take a look, I am willing to provide them.

 

by: ravenplPosted on 2007-10-03 at 12:39:15ID: 20009405

to verify selinux
selinuxenabled && echo OK

to verify if port 80 is occupied
netstat -ltnp | grep :80

to verify user You are logged in
id
both error usually are either due to "apache already running" or not enought priviledges.

 

by: gpabstPosted on 2007-10-03 at 13:42:27ID: 20009888

Below are the results of running these commands

# selinuxenabled && echo OK
bash: selinuxenabled: command not found
# netstat -ltnp | grep :80

I think the issue is with the configuration files or priveleges as there is no service running on port 80

 

by: gpabstPosted on 2007-10-03 at 16:47:24ID: 20010922

Could it be related to having multiple Listen commands for the same ports throughout the .conf files?

 

by: samriPosted on 2007-10-04 at 12:31:17ID: 20017046

could you do a simple "telnet 127.0.0.1 80" while logged in to the machine.

we are looing for connection refused response.
telnet: connect to address 127.0.0.1: Connection refused
telnet: Unable to connect to remote host: Connection refused

if you are getting something else -- most likely there are something running and listening on port 80.

--
(98)Address already in use: make_sock: could not bind to address [::]:80
(98)Address already in use: make_sock: could not bind to address 0.0.0.0:80

 

by: gpabstPosted on 2007-10-04 at 14:11:00ID: 20017896

I receive a "connection refused" response... this must be related to the configuration files, if I remove all the special configuration options and only have one Listen 80 then the server starts but of course not of the virtual hosts are configured (which is necessary)

 

by: samriPosted on 2007-10-04 at 15:41:10ID: 20018472

hi

connection refused means that nothing is running and binding to port 80.  So this is good.

multiple Listen directive should be fine - http://httpd.apache.org/docs/2.2/mod/mpm_common.html#listen

However, there is a note that may be what you are experiencing.

Error condition
Multiple Listen directives for the same ip address and port will result in an Address already in use error message.

 

by: gpabstPosted on 2007-10-04 at 16:00:18ID: 20018558

Interestingly if I change the ports from 80 to 8080 then I recieve this error

vhosts.d # apache2ctl start
 * Starting apache2 ...
apache2: Could not reliably determine the server's fully qualified domain name, using 127.0.0.1 for ServerName
[Thu Oct 04 14:56:32 2007] [warn] NameVirtualHost *:80 has no VirtualHosts
(98)Address already in use: make_sock: could not bind to address [::]:443
(98)Address already in use: make_sock: could not bind to address 0.0.0.0:443
no listening sockets available, shutting down
Unable to open logs                                                       [ !! ]

Notice that the complaint is now about the SSL port 443, then I change that port to 444 (just for testing) and then this is the response from apache2ctl:

vhosts.d # apache2ctl start
 * Starting apache2 ...
apache2: Could not reliably determine the server's fully qualified domain name, using 127.0.0.1 for ServerName
[Thu Oct 04 15:00:51 2007] [warn] NameVirtualHost *:80 has no VirtualHos  [ !! ]


Notice the [!!] is in red, but its not clear what error actually made apache2 quit

 

by: samriPosted on 2007-10-04 at 16:35:31ID: 20018703

could you post your Listen directive?

[Thu Oct 04 15:00:51 2007] [warn] NameVirtualHost *:80 has no VirtualHos  [ !! ] is just a warning... apache should starts fine (if this is the only error).  Your Apache should be running on port 80 at this stage.

That is probably because you do not have Vitualhost container for *:80.

Check the
Listen
NameVitualHost
and all <VirtualHost>

and make sure that they all tally with each other.  Typically.

Listen 80   # for HTTP

NameVirtualHost *:80

<VirtualHost *:80>
  ServerName ...
  ServerAlias ...
#...
#...
</VirtualHost>

20120131-EE-VQP-002

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