Apache :: Mod Balancer And Stickiness Without Cookie
Oct 15, 2014
I have a short question concerning Mod Balancer and Stickiness:
At the moment I am achieving stickiness with a cookie.
Header add Set-Cookie "ROUTEID=.%{BALANCER_WORKER_ROUTE}e; path=/" env=BALANCER_ROUTE_CHANGED
However, I am getting complaints by users which do not allow coockies in their browser settings that my page does not work properly.
Is there any way to achieve Stickiness with out cookies (e.g. add the information to the URL or something like that)?
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Dec 11, 2014
I am using 2.2.29 in Windows.Trying to remove one cookie in a request header before passing the request to the application, but having trouble. The cookie is in the middle of the request header.
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Apr 24, 2014
I am trying to make sessions work across both my webservers which are load balanced.I have followed many tutorials that say to do this:
RewriteRule ^(.*)$ public_html/index.php - [co=JSESSIONID:balancer.view-a:.ea-hq.com]
However, when I put the extra code at the end of my redirect in .htaccess I get "Bad flag delimiters" and the internal server error page.I am using Apache 2.4 with PHP 5.4.11 on Windows.
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May 30, 2013
I have a setup where Apache connects to a F5 load balancer which in turn balances between two jboss app servers.
Apache using mod_proxy -> F5 (hardware load balancer) -> 2 jboss application server
It uses jsessionid. I sometimes get 500 errors for the post methods. I think the request goes to the incorrect jboss server because of the F5 load balancer. Everything works just right when I shutdown one of the jboss app servers.
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Apr 23, 2015
I'm using mod_proxy_balancer in Apache 2.2.29 with OpenSSL on Windows to distribute HTTPS requests to two other back end servers, both of which are also Apache 2.2.29 with OpenSSL on Windows.
DumpIO shows that the requests are being decrypted on the balancer, and then sent unencrypted to the two workers. I would like to have the requests pass through the balancer without decrypting there, and let the two back end worker servers do the decryption. Is that possible? If so, how?
When I tried simply disabling SSL on the balancer, the requests fail, with nothing logged at all.
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Mar 5, 2013
I am using single Apache HTTP Server (2.2.23) as a Load Balancer with two IBM Websphere application server nodes (other machines). I have deployed the simple text based helloWorld application and it works fine with load balancer. But When I deploy the real application that contains images,css file , java script file. It loads the page without images and show me simple text and gives me the following Exception on error_logs and similar kind of exceptions
[error] [client 192.217.71.77] File does not exist: /usr/local/apache2/htdocs/application, referer: http://192.168.141.17/application/faces/test.jsp
Interestingly, when I access the application without load balancer, it also works fine.
Here are the load balancer settings
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Aug 25, 2007
I have a problem on obe of my servers. None of the forums and scirpts which have mysql databases dont accept usernames to login.
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Jun 21, 2007
I use a persistent and session cookie in order to help track return visitors, latent conversions and keyword tracking. My problem is that my hosting company, BlueHost, does not allow me to write the cookie data to my raw access log which would enable me to analyze this information.
Does anyone have any experience with using a script in order to get around this issue and write the cookie data to my log file....or as an alternative can people recommend a good hosting company which enables this functionality?
BlueHost has generally worked fine, so a work-around would be preferred, but if needed I may switch.
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Aug 24, 2007
I have put an Access database inside an access_db folder on Godaddy and written some .asp pages that query it. I am trying to make sure that I take necessary precautions against hackers reading or even writing to the database. Maybe someone can give some remarks about whether any of these concerns are realistic, and if so, why and what I could do about it?
1) Could someone somehow navigate directly to the database and read or write to it (the access_db folder seems to have no read/write permissions as set by default by Godaddy, but how secure is that?)
2) I permit entry through use of a a userid and password that are looked up in an mdb in the same folder (not listed in the html itself). If there’s a match, I store the userid as a session cookie. Then, to visit any other pages, each page first checks to see if the cookie is empty before proceeding. Is it possible for someone to set the cookie themselves and thus break through (can a cookie be set manually?) If so, would it help if I mandated that the cookie be set to something specific (right now it just has to be non-blank) or can they find out what the cookie should be set to as well?
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Feb 23, 2008
Im currently looking around for a Load Balancer within the budget of about £2,500
Anyone have any suggestions?
Will that budget get me one that will do the job or would I be wasting my money and should maybe save up some more cash?
Setup:
2x Web Servers
1x DB Server
1x Storage / Media Servers
*Expanding to 3/4x Web Servers, 2x DB Servers, 2x Storage / Media Servers*
I have been looking at:
F5 BIG IP D25 Load Balancer
[url]
and
F5 BIG IP D30 Load Balancer
[url]
But im unsure on what the difference between these are? as I cant seem to find there specs and what they can / cant do..
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Apr 20, 2007
Anyone know of a good load balancer for Linux that is able to not only distribute load evenly amongst many servers, but one that's able to allocate servers based on the resource?
For instance:
I want www.mysite.com/dogs to be load-balanced between servers A, B, and C.
I want www.mysite.com/cats to be load-balanced between servers X, Y, and C.
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Aug 7, 2007
A little bit excited as the Barracuda is coming soon...
We have 1 forum server, and it's being access internally by all the classrooms, students, teachers, etc. How should I approach this setup? The current hostname for the forum machine is forum... how should I setup the cluster? forum2?
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Dec 11, 2007
Is there any such solution available?
Something with a failover load balancer that you can assign a static IP address to and it'll sit in front of a number of lowend virtual private servers.
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Sep 5, 2007
I have two servers that I run in Los Angeles (used to host gaming servers for a small community I run) for personal use that seem to be a little jumpy with server performance.
Would a load balancer help with this situation?
And for the n00b question, what exactly is a load balancer.
Very new to hosting servers, so I appreciate a gentle response
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Apr 15, 2008
I wish to build a load balancer on a linux box that will load balance http/https/smtp/pop3 and ftp
what technologies i need to look at?
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May 4, 2008
I'm using Virtuozzo on two server.
1) Can I do this with only ONE Load Balancer?
I wish I could have many "LB", like one for the WWW serveur, an other one for the DB serveur, my "personnal" VPS without LB...
i.e. :
WWW -> SRV1 SRV2
DB1 -> DB1 DB2
EXCESSNET -> EXCESSNET1
Do I need 3 LB to do this or I can do it with only one? The screenshot of Barracuda LB seem to show many "virtual LB", so I guest it's a yes?
2) So... it's service only?
On the Barracuda and some page, they are talking about "service" and not "server" LB. Can I LB a whole serveur ? Like all service from an IP xxx.xxx.xxx.234 to a server ? Or I can only do "HTTP -> SRV1" "DNS -> SRV1"? If no, what happen to service that the LB didn't know (like cPanel)?
3) An Internal Network? what About cPanel?
According to my search, LB are working like this:
EXTERNAL IP of SERVICE (xxx.xxx.xxx.200) -> INTERNAL IP SERVER 1(10.0.0.25), INTERNAL IP SERVER 2 (10.0.0.26)
So, I need to configure the server with an Internal IP cause else, it will conflit on the "local network". The probleme is, cPanel will be using the "Internal IP" to make all of his configuration... so if a user add a new website, he will configure it with 10.0.0.25, this won't since the external IP will be xxx.xxx.xxx.200 and Apache won't anwser to this virtual host. What can I do?
Can I do this ? (same internal IP as the external?)
EXTERNAL IP (70.234.125.123) -> SERVER 1 INTERNAL IP (70.234.125.123), SERVER 2 INTERNAL IP (10.0.0.26)
If yes, I will configure the second serveur without cPanel and only sync the configuration and files. So in case of "crash" of the server 1, cPanel won't be working, but website won't be down...
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May 9, 2008
We are planning for a clustering archirecture for our mail servers,The basic idea is put all of mailservers behind a load balancer which will monitor and distribute the n/w load as server load and forward the requests accordingly can u suggest any good hardware loadbalancer which could give us 'server load balancing' as well as n/w load balacing.
I would also like to know if it is a good idea to go for a software load balancer(like linux heartbeat) or to h/w load balancer.
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Mar 8, 2008
traffic has been surging lately and is expected to continue surging. i am already on the fastest chipset my webhost has.
current configuration
single server (centos), webserver (apache), single filesystem. many dynamic pages (perl script) but no mysql database. no php.
ideal configuration
multiple webservers (apache), single file system.
assuming my scripts do not write to the filesystem (read only), what do i need to install or do in order to send a request for www.domain.com to server1.domain.com or server2.domain.com or server3.domain.com according to the load of each? it should look the same at the front end. anyone know what i need to get?
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Mar 27, 2008
if it is possible to hide the Barracuda Load Balancer signature in headers ?
If you check here : [url]
or do a telnet 80 to that same FQDN and send "HEAD / HTTP/1.0" + "RETURN" you will be able to see in the headers the server signature (BarracudaHTTP 1.00).
Is there any way to hide this?
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May 23, 2007
I'm trying to find a solution but without any result so far,
This is the story:
We have too server in Israel, in one server we have:
Win 2003 STR that use for IIS (IBM RAID 5)
And in the second we have:
Win 2003 STR + SQL SERVER 2005 workgroup.
After 1 year running in Israel we like to go out to the world with our products.
This is what I think we need to do but we still don't figure how to that:
1. Still use the same server in Israel.
2. Buy more server outside Israel, Lets say UK and set a Load Balancer between the server in UK to Israel (both IIS and SQL).
3. In the Load balancer we like to set that if the user come from europe you will go to the server in UK and if he come from Israel you go the server there.
4. If one of the server we be go down all the the users will sends to the server outside there country.
5. In the future we like to add more server in the world on the same setting.
What do you say? how can I do something like that?
What company are dealing stuff like that?
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Feb 22, 2008
Anyone know of a hardware load balancer that can load balance my apache and mysql using one device? I mean right now I can use the ultra monkey for the load balancer the cluster mysql. But I want to go hardware.
I was thinking of F5 BIGIP? will that work? anyone know Please give me some choices..
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Jul 17, 2008
I am thinking of using a Load Balancer + serveral VPSs solution.
Is there any good recommendation ? It would be great if the hosting company can provide the load banlancer for free.
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Aug 16, 2008
Webmail Login Error-"error: Your request didn't contain the proper session ID cookie"
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Nov 15, 2013
Server Version: Apache/2.2.22 (Unix)
On our production service, we've been getting numerous malformed POST requests to some of our CGI scripts that are showing up as 500 errors in our logs. They are malformed in the sense that the actual content length doesn't match the Content-Length specified in the request.
Here's the most trivial example I can come up with that reproduces the problem for us:
POST /some_valid_alias HTTP/1.1
Host: example.org
User-Agent: Arbitrary/1.0
Content-Type: multipart/form-data; boundary=---------------------------41184676334
Content-Length: 769
-----------------------------41184676334
In addition to the 500 error in the access log, we see the corresponding error in the error log:
(70014)End of file found: Error reading request entity data
Based on the nature of the POST request and the error response, it does appear that Apache is doing the right thing here.
The POST never actually makes it as far as the script being targeted (/some_valid_alias in the above example); in other words, Apache returns 500 to the client, writes the error to the error log and never executes the script.
Is there a way to capture/avoid internal Apache errors like 70014, and return some other HTTP status besides 500 (like 403)? It's particularly annoying in our case, because our server sends us an email for all 500 errors.
So far, our best "defense" against these 500 errors is to disallow POST for these aliases, which normally just ignore the POST data anyway (when the request is not malformed):
RewriteCond %{REQUEST_METHOD} ^POST$
RewriteRule ^/(some_valid_alias)(.*)$ $1$2 [R]
But this won't work for all our scripts, because in some cases we do want to permit POST.
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Jul 23, 2007
I've had this problem a long time now with my hosting network and decided to ask here hoping I get some good solutions, or if someone is willing to looking at this (I'll pay if they want).
Here's what I mean:
[url]
Problem is as you can see apache processes constantly rise infinitely, at least until I restart apache (/etc/init.d/httpd restart). The point of restart is shown in red lines.
And after restart, it goes down again for X amount of hours then eventually rises again infinitely until it's restarted again.
But the fact that after restart it remains down, it means it had the potential to be down all along.
So my question is: what could be causing this and does anyone have solution to keep them low at all times (as per graphs)?
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May 28, 2008
The Linux Server got down when the MaxClients 256 is reached.
Error Log:
"server reached MaxClients setting, consider raising the MaxClients setting"
So that I have tried to increased the MaxClients Value to 500, after changed the value in httpd.conf and restart I get following error message.
" [notice] SIGHUP received. Attempting to restart
WARNING: MaxClients of 500 exceeds ServerLimit value of 256 servers,
lowering MaxClients to 256. To increase, please see the ServerLimit
directive."
So that I tried changed the Server limit in /usr/local/apache/include/httpd.h header file. but it seems like there is no entry.
Apache Version : 2.2.8
So I have added the ServerLimit 500 entry in httpd.conf file and restart the httpd service. But still shows the same warning mesg. Please help me regarding this.
We have the Dedicated server for Flash Game Server with following configuration.
RHEL4 OS
2GB RAM
Intel(R) Xeon(R) X3210 @ 2.13GHz
Cpanel Installed.
Apache 2.2.8
PHP 5.2.4
MySQL 4.1.2 (MySQL Server is working in differend server)
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Mar 22, 2008
I have the following Apache redirect code in .htaccess:
RewriteRule ^sap-latest-news/([0-9]*)/([A-Za-z0-9_-.]*).htm$ /domain.com/app/modules/content/latestNews.php?id=$1 [L]
This redirect works fine on Apache 2.2.8, but doesn't work on Apache 1.3.41
The following is the entry from error_log:
RewriteRule: cannot compile regular expression '^sap-latest-news/([0-9]*)/([A-Za-z0-9_-.]*).htm$'
A simple Rewrite is working fine in Apache 1.3, but the above regualar expression doesn't seem to be working on Apache 1.3. Does anyone know whether Apache 1.3 doesn't support it?
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