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Posted to users@httpd.apache.org by Jurgen Stroo <bl...@JurgenStroo.com> on 2004/08/05 11:44:59 UTC
[users@httpd] Apache over NFS
Hi List,
I am trying to use apache over NFS, we have some diskless machines which
mount their root fs from a boot server.
Now, when I try to start the httpd daemon (Redhat Enterprise server), it
is not spawning child processes, I am also not getting a .pid file. De
/var dir is a symlink to /ram/var
I've enable the folloowing:
AcceptMutex flock
LockFile /var/log/httpd/accept.lock
I use prefork.c as MPM (Unix default)
Anyone any idea?
Jurgen
---------------------------------------------------------------------------
"When a man sits with a pretty girl for an hour, it seems like a minute.
But let him sit on a hot stove for a minute and it's longer than any hour.
That's relativity." [A. Einstein, 1938]
http://jurgenstroo.com
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Re: [users@httpd] Apache over NFS
Posted by "Gustavo A. Baratto" <gb...@superb.net>.
mmmmmm.... very hard to say...
I used it apache over NFS before...
Trying to write the logs, pid and lock files to a RO volume, and a common
httpd.conf (that made pid and lock file to be overwritten), were the only
problems I've had.
And these could be fixed in 2 minutes.
sorry I'm no help here :(
----- Original Message -----
From: "Jurgen Stroo" <bl...@JurgenStroo.com>
To: <us...@httpd.apache.org>
Sent: Thursday, August 05, 2004 1:48 PM
Subject: Re: [users@httpd] Apache over NFS
> The NFS mount is read-only for the config files and the binaries, the log
> files are placed on a read-write NFS mount. I also tried them on RAM disk,
> later this afternoon, but still, it is not working. The httpd is only
> running on the NFS server itself, with the same config file.
>
> I tried the LogLevel on debug, but the error logging is not very verbose,
> so to speak. It does not say anything more than the warn level.
>
> each node has its own read-write directory on the NFS share, so they do
> not touch each others pid files.
>
> An strace does not say about something going wrong.
>
> lock and pid files should be able to reside on a ramdisk, as far as I can
> concern.
>
> I also saw that the diskless nodes don't have a swap file, may apache
> needs a swap file of something?
>
> http://jurgenstroo.com
>
> This one time, at band camp, Gustavo A. Baratto said:
>
> > Is the nfs volume mounted read-only?
> > If it is, apache won't be able to write the pid, logs, lock file, etc.
> >
> > Another problem is that if you have more than one machine using the same
set
> > of binaries and httpd.conf under the same nfs volume (even RW), one
machine
> > will overwrite the pid and lock files, since all boxes will have the
same
> > LockFile and PidFile directives in httpd.conf. And all logs will be
shared.
> >
> > Try just 'tail -f' the error log. This is the best way to find out where
the
> > problem is.
> >
> > cheers
> >
> > ----- Original Message -----
> > From: "Jurgen Stroo" <bl...@JurgenStroo.com>
> > To: <us...@httpd.apache.org>
> > Sent: Thursday, August 05, 2004 2:44 AM
> > Subject: [users@httpd] Apache over NFS
> >
> >
> > > Hi List,
> > >
> > > I am trying to use apache over NFS, we have some diskless machines
which
> > > mount their root fs from a boot server.
> > > Now, when I try to start the httpd daemon (Redhat Enterprise
server), it
> > > is not spawning child processes, I am also not getting a .pid file.
De
> > > /var dir is a symlink to /ram/var
> > >
> > >
> > > I've enable the folloowing:
> > >
> > > AcceptMutex flock
> > > LockFile /var/log/httpd/accept.lock
> > >
> > > I use prefork.c as MPM (Unix default)
> > >
> > >
> > > Anyone any idea?
> > >
> > > Jurgen
> > >
> > >
> > >
> >
> --------------------------------------------------------------------------
> > -
> > > "When a man sits with a pretty girl for an hour, it seems like a
minute.
> > > But let him sit on a hot stove for a minute and it's longer than any
hour.
> > > That's relativity." [A. Einstein, 1938]
> > >
> > > http://jurgenstroo.com
> > >
> > > ---------------------------------------------------------------------
> > > The official User-To-User support forum of the Apache HTTP Server
Project.
> > > See <URL:http://httpd.apache.org/userslist.html> for more info.
> > > To unsubscribe, e-mail: users-unsubscribe@httpd.apache.org
> > > " from the digest: users-digest-unsubscribe@httpd.apache.org
> > > For additional commands, e-mail: users-help@httpd.apache.org
> > >
> >
> >
> > ---------------------------------------------------------------------
> > The official User-To-User support forum of the Apache HTTP Server
Project.
> > See <URL:http://httpd.apache.org/userslist.html> for more info.
> > To unsubscribe, e-mail: users-unsubscribe@httpd.apache.org
> > " from the digest: users-digest-unsubscribe@httpd.apache.org
> > For additional commands, e-mail: users-help@httpd.apache.org
> >
> >
>
> ---------------------------------------------------------------------
> The official User-To-User support forum of the Apache HTTP Server Project.
> See <URL:http://httpd.apache.org/userslist.html> for more info.
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Re: [users@httpd] Apache over NFS
Posted by Jurgen Stroo <bl...@JurgenStroo.com>.
The NFS mount is read-only for the config files and the binaries, the log
files are placed on a read-write NFS mount. I also tried them on RAM disk,
later this afternoon, but still, it is not working. The httpd is only
running on the NFS server itself, with the same config file.
I tried the LogLevel on debug, but the error logging is not very verbose,
so to speak. It does not say anything more than the warn level.
each node has its own read-write directory on the NFS share, so they do
not touch each others pid files.
An strace does not say about something going wrong.
lock and pid files should be able to reside on a ramdisk, as far as I can
concern.
I also saw that the diskless nodes don't have a swap file, may apache
needs a swap file of something?
http://jurgenstroo.com
This one time, at band camp, Gustavo A. Baratto said:
> Is the nfs volume mounted read-only?
> If it is, apache won't be able to write the pid, logs, lock file, etc.
>
> Another problem is that if you have more than one machine using the same set
> of binaries and httpd.conf under the same nfs volume (even RW), one machine
> will overwrite the pid and lock files, since all boxes will have the same
> LockFile and PidFile directives in httpd.conf. And all logs will be shared.
>
> Try just 'tail -f' the error log. This is the best way to find out where the
> problem is.
>
> cheers
>
> ----- Original Message -----
> From: "Jurgen Stroo" <bl...@JurgenStroo.com>
> To: <us...@httpd.apache.org>
> Sent: Thursday, August 05, 2004 2:44 AM
> Subject: [users@httpd] Apache over NFS
>
>
> > Hi List,
> >
> > I am trying to use apache over NFS, we have some diskless machines which
> > mount their root fs from a boot server.
> > Now, when I try to start the httpd daemon (Redhat Enterprise server), it
> > is not spawning child processes, I am also not getting a .pid file. De
> > /var dir is a symlink to /ram/var
> >
> >
> > I've enable the folloowing:
> >
> > AcceptMutex flock
> > LockFile /var/log/httpd/accept.lock
> >
> > I use prefork.c as MPM (Unix default)
> >
> >
> > Anyone any idea?
> >
> > Jurgen
> >
> >
> >
> > --------------------------------------------------------------------------
> -
> > "When a man sits with a pretty girl for an hour, it seems like a minute.
> > But let him sit on a hot stove for a minute and it's longer than any hour.
> > That's relativity." [A. Einstein, 1938]
> >
> > http://jurgenstroo.com
> >
> > ---------------------------------------------------------------------
> > The official User-To-User support forum of the Apache HTTP Server Project.
> > See <URL:http://httpd.apache.org/userslist.html> for more info.
> > To unsubscribe, e-mail: users-unsubscribe@httpd.apache.org
> > " from the digest: users-digest-unsubscribe@httpd.apache.org
> > For additional commands, e-mail: users-help@httpd.apache.org
> >
>
>
> ---------------------------------------------------------------------
> The official User-To-User support forum of the Apache HTTP Server Project.
> See <URL:http://httpd.apache.org/userslist.html> for more info.
> To unsubscribe, e-mail: users-unsubscribe@httpd.apache.org
> " from the digest: users-digest-unsubscribe@httpd.apache.org
> For additional commands, e-mail: users-help@httpd.apache.org
>
>
---------------------------------------------------------------------
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Re: [users@httpd] Apache over NFS
Posted by "Gustavo A. Baratto" <gb...@superb.net>.
Is the nfs volume mounted read-only?
If it is, apache won't be able to write the pid, logs, lock file, etc.
Another problem is that if you have more than one machine using the same set
of binaries and httpd.conf under the same nfs volume (even RW), one machine
will overwrite the pid and lock files, since all boxes will have the same
LockFile and PidFile directives in httpd.conf. And all logs will be shared.
Try just 'tail -f' the error log. This is the best way to find out where the
problem is.
cheers
----- Original Message -----
From: "Jurgen Stroo" <bl...@JurgenStroo.com>
To: <us...@httpd.apache.org>
Sent: Thursday, August 05, 2004 2:44 AM
Subject: [users@httpd] Apache over NFS
> Hi List,
>
> I am trying to use apache over NFS, we have some diskless machines which
> mount their root fs from a boot server.
> Now, when I try to start the httpd daemon (Redhat Enterprise server), it
> is not spawning child processes, I am also not getting a .pid file. De
> /var dir is a symlink to /ram/var
>
>
> I've enable the folloowing:
>
> AcceptMutex flock
> LockFile /var/log/httpd/accept.lock
>
> I use prefork.c as MPM (Unix default)
>
>
> Anyone any idea?
>
> Jurgen
>
>
>
> --------------------------------------------------------------------------
-
> "When a man sits with a pretty girl for an hour, it seems like a minute.
> But let him sit on a hot stove for a minute and it's longer than any hour.
> That's relativity." [A. Einstein, 1938]
>
> http://jurgenstroo.com
>
> ---------------------------------------------------------------------
> The official User-To-User support forum of the Apache HTTP Server Project.
> See <URL:http://httpd.apache.org/userslist.html> for more info.
> To unsubscribe, e-mail: users-unsubscribe@httpd.apache.org
> " from the digest: users-digest-unsubscribe@httpd.apache.org
> For additional commands, e-mail: users-help@httpd.apache.org
>
---------------------------------------------------------------------
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See <URL:http://httpd.apache.org/userslist.html> for more info.
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Re: [users@httpd] Apache over NFS
Posted by Joshua Slive <js...@gmail.com>.
On Thu, 5 Aug 2004 11:44:59 +0200 (CEST), Jurgen Stroo
<bl...@jurgenstroo.com> wrote:
> Hi List,
>
> I am trying to use apache over NFS, we have some diskless machines which
> mount their root fs from a boot server.
> Now, when I try to start the httpd daemon (Redhat Enterprise server), it
> is not spawning child processes, I am also not getting a .pid file. De
> /var dir is a symlink to /ram/var
>
> I've enable the folloowing:
>
> AcceptMutex flock
> LockFile /var/log/httpd/accept.lock
>
> I use prefork.c as MPM (Unix default)
Anything interesting in the error log? Have you tried strace'ing
httpd? Have you tried starting it under a debugger?
Joshua.
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