Solved

How do I jail apache on Debian with multiple vhosts

Posted on 2015-01-06
9
285 Views
Last Modified: 2015-01-14
I am setting up a server farm to run 70 vhost sites on a Debian distribution. I would like to jail apache instances and assign different vhosts to a specific apache pool which in turn is jailed to use specific amount of resources.

I would like to separate the 70 vhosts into 5 different apache pools. Each pool would be jailed. I do not want to run each vhost in its own jail however. Is it even possible and if so any hint on how to go about it?
0
Comment
Question by:akorkishko
  • 5
  • 3
9 Comments
 
LVL 77

Expert Comment

by:arnold
ID: 40534900
i'm not really clear what you are looking for.

There are modules if you are looking to limit resources, bandwity amount of data transfer for some sites, etc.
0
 
LVL 61

Expert Comment

by:gheist
ID: 40536309
itk mpm allows that.
Why would you isolate sites that have plain static files?
0
 

Author Comment

by:akorkishko
ID: 40549538
I am trying to isolate each site resource wise. So if one site has a problem and has a memory leak, I didn't want other sites to be affected by it.
0
 
LVL 61

Expert Comment

by:gheist
ID: 40549669
Apache never uses more than 20MB of RAM per process. What modules you have so it became a problem?
0
PRTG Network Monitor: Intuitive Network Monitoring

Network Monitoring is essential to ensure that computer systems and network devices are running. Use PRTG to monitor LANs, servers, websites, applications and devices, bandwidth, virtual environments, remote systems, IoT, and many more. PRTG is easy to set up & use.

 

Author Comment

by:akorkishko
ID: 40549710
On the older server we were hosting around 40 websites via VirtualHost, once one of the sites "hangs" it spikes CPU to 100% and completely takes out the server, causing other sites to break as well. I think a solution we will go with is to run multiple apache start scripts and assign them to different conf files and listen on different ports. Then if one site fails, we will only bring down part of the websites and not the whole server.
0
 
LVL 61

Expert Comment

by:gheist
ID: 40549764
Are you using PHP? I see no chance apache alone uses such lots of CPU.
Apache uses multiple processes, so there is no change of having multiple instances - one that dies as you say (There is nice vulnerability for that in old apaches) will kill the rest no matter pools or whatever.
0
 

Author Comment

by:akorkishko
ID: 40549770
Sorry, yes PHP/mysql. We are doing a lot of joomla and wordpress, those were usually the source of the problem in the past
0
 
LVL 61

Accepted Solution

by:
gheist earned 500 total points
ID: 40549792
I already suspected.
I suggest you run mod_fcgi and php-cgi and enable PHP on sites where it is needed.
It will make pool of PHP processes per site and you easily see eaten up memory per site with PHP (and punish and advise guilty)
Ahh yes, that involves switching to worker MPM...  100 connections=12MB apache process + as many PHP backends as needed.
Study documentation carefully.
I can help with recipe if you get stuck somewhere.
0
 
LVL 61

Expert Comment

by:gheist
ID: 40549841
A light site can run with 2 PHP backend processes this way, so the first heavy script does not kill "other users" of same site. I have god's forgotten sites that probably are visited now and then by bored search spiders, thay run with one php-cgi process just fine...
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

It is possible to boost certain documents at query time in Solr. Query time boosting can be a powerful resource for finding the most relevant and "best" content. Of course the more information you index, the more fields you will be able to use for y…
Password hashing is better than message digests or encryption, and you should be using it instead of message digests or encryption.  Find out why and how in this article, which supplements the original article on PHP Client Registration, Login, Logo…
Learn how to match and substitute tagged data using PHP regular expressions. Demonstrated on Windows 7, but also applies to other operating systems. Demonstrated technique applies to PHP (all versions) and Firefox, but very similar techniques will w…
The viewer will learn how to count occurrences of each item in an array.

911 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

17 Experts available now in Live!

Get 1:1 Help Now