VMware Communities: Message List - Hercules Load Balancer Virtual Appliance

Re: Hercules Load Balancer Virtual Appliance

mrdenny — Sat, 19 Sep 2009 23:48:43 GMT

I've got Pen up and running without issue, but when I fire up vrrpd to setup redundant pen load balancers nothing works correctly.

I posted my setup and config up on Server Fault. If someone could take a peak and respond either here or there I'd be most grateful.

Thanks,

Denny

Re: Hercules Load Balancer Virtual Appliance

hicksj — Wed, 10 Jun 2009 12:39:21 GMT

@jwstern - I downloaded pen and compiled it on a separate linux server, one that I was already using for various network management/monitoring functions. Then I placed the penctl.cgi in that management server's cgi-bin directory... also needed to mod the PENCTL path definition at the top of penctl.cgi.

To keep the appliance small, the author stripped out any ability to compile tools like this on the Hercules box itself.

One thing you need to be careful with, there doesn't appear to be any authentication... at least not that I've found - but I haven't looked hard either. Its security by obscurity at this point. If anyone knows the management ip/port, they can use penctl to manage the settings.

Re: Hercules Load Balancer Virtual Appliance

jwstern — Tue, 09 Jun 2009 16:34:27 GMT

question for hicksj.....how did you set up penctl.cgi on a Hercules appliance ? Where do I get it and where do I put it?

Re: Hercules Load Balancer Virtual Appliance

mrdenny — Tue, 09 Jun 2009 04:53:08 GMT

With a little more poking around I was able to get the system up and running. Apparently ESX didn't like the relitive path to the vmdk file. When I put the explicit path in the VM booted up.

With the addition of a little more poking around I've managed to get a VIP up and running, sort of. I can access the VIP from within the same subnet, but I can't access it from outside the subnet. But I can access the main IP of the machine.

The main IP for eth0 is 10.3.16.96.

I've setup an IP for eth0:1 on 10.3.16.58 and I've got that vip going to 10.3.16.56 and 10.3.16.57. Any machines on the 10.3.16.0/24 subnet can access 10.3.16.58, but no machines on the other subnets can access this vip.

When I'm booting up the VM I've created a file in /etc/init.d to start the pen instance. Within that script I've added "ifconfig eth0:1 10.3.16.58 netmask 255.255.255.0 up"to bring the IP online. Is there a better method that I should be using?

Denny

Re: Hercules Load Balancer Virtual Appliance

mrdenny — Mon, 08 Jun 2009 19:51:18 GMT

I must be doing something very wrong here. I've got the vmdk converted and setup in a new VM as per Hoppa66's directons a couple of pages back. However each time I try and fire up the VM on my cluster I get "Failed to relocate virtual machine".

Any ideas what I'm doing wrong? Sorry I can't pre-emtivly provide more info. I'm not exactly a VMware Expert.

Thanks,

Denny

Re: Hercules Load Balancer Virtual Appliance

mrdenny — Mon, 08 Jun 2009 18:49:19 GMT

Mike,

Thanks. That's perfect. I was actually able to download via torrent, but it didn't work under ESX which was my next question. Kudos to you since this version appears to run undex ESX directly.

Denny

Re: Hercules Load Balancer Virtual Appliance

somecallmemike — Mon, 08 Jun 2009 13:06:51 GMT

Mrdenny,

Look on page 2 or 3, it should be the second link that is given (you should read some of the comments, lots of good information). Otherwise search sourceforge and they might have it.

Re: Hercules Load Balancer Virtual Appliance

mrdenny — Fri, 05 Jun 2009 18:04:00 GMT

This may sound like a stupid question, but where's the download link (assuming this is still available)? I don't see one on the link you provided.

I'd like to give this a try for some internal load ballancing.

Thanks,

Denny

penctl.cgi

jwstern — Thu, 04 Jun 2009 20:02:04 GMT

Can anyone tell me how of if I can configure penctl.cgi in Hercules . I want to be able to control it throuh a web based ui but I dont see any documentation on how to configure penctl.cgi.

Has anyone done this?

Re: Hercules Load Balancer Virtual Appliance

somecallmemike — Fri, 22 May 2009 03:15:32 GMT

Curious if anyone has benchmarks or determined limitations to this LB? We are looking at building a HA mail cluster for 150,000+ users and I would really like to be able to tell my director that I can save him 20k by building two virtual load balancers in under an hour rather than purchasing two Foundry products, but I cannot find a lick of evidence that Hercules would be able to handle high loads (read through the whole thread and didn't see much in the way of stats). Has anyone compared this product to HAproxy, which has well documented success stories?

Thanks in adavance!

Re: Hercules Load Balancer Virtual Appliance

ehinkle — Wed, 20 May 2009 18:54:30 GMT

Can you use this to load balance microsoft terminal servers (RDP 3389)? Has anyone done this?

Re: Hercules Load Balancer Virtual Appliance

stevekdavis — Wed, 25 Mar 2009 13:41:47 GMT

quote"

It seems as if there is a BUG in static IP assignment process. You can not set a default gateway while booting.

Check your console messages for something like that:

route: SIOCADDRT: File exists

and you can check with netstat -rn if the default gw was set."

does anyone know if there's a workaround for this bug as using DHCP will cause me issues and I'm seeing the "forgotten" default gateway bug.

thanks

steve

Re: Hercules Load Balancer Virtual Appliance

Fr3dY — Wed, 14 Jan 2009 09:26:57 GMT

Hi! I've tested Hercules 1.3 (downloaded from Sourceforge) and wanted to create a bridge using 'brctl' from BusyBox , finding out that the function is not available.

Is it possible to compile latest BusyBox from Hercules in order to use it? Any other solution? (A newer Hercules machine available or something).

Thanks!

Re: Hercules Load Balancer Virtual Appliance

JasonPenney — Tue, 25 Nov 2008 21:07:35 GMT

I figured out how to add multple IPs, so I thought I'd post the solution. Normally, you'd just add network aliases in the /etc/network/interfaces file, but the version of BusyBox that is included with Hercules has a known bug that prevents setting up aliases in that file (reference). There is a workaround, however. Create a new script with commands like this:

ifconfig eth0:1 10.10.100.100

Save the script as S45interfaces and put it in the /etc/init.d/ folder. It will then run on startup and setup your alias IPs.

Re: Hercules Load Balancer Virtual Appliance

JasonPenney — Fri, 21 Nov 2008 17:02:20 GMT

Matt's post is 2 years old, but I'm hoping for a bit more detail on binding multiple IPs to the Hercules box. Can I bind multiple IPs to a single NIC without adding additional Virtual NICs?

In Windows, I’d just open the properties on the Local Area
Connection and add the new static IPs on the TCP/IP advanced properties.

Clearly I'm not a Linux guy.

Re: Hercules Load Balancer Virtual Appliance

AdamVM — Wed, 29 Oct 2008 04:31:22 GMT

Prabhakar - Great virtual appliance - are there any plans on updating kernel, etc. or is this project mothballed?

Re: Hercules Load Balancer Virtual Appliance

pixiel — Tue, 28 Oct 2008 16:05:33 GMT

Check the earlier post (Page 1-2). The author posted some links there.

Re: Hercules Load Balancer Virtual Appliance

markdjones82 — Tue, 28 Oct 2008 15:54:56 GMT

I am unable to download from the appliance site. How do we obtain a copy of this?

Re: Hercules Load Balancer Virtual Appliance

pixiel — Tue, 28 Oct 2008 12:46:29 GMT

Thanks for this.

Great Virtual Appliance

Re: Hercules Load Balancer Virtual Appliance

hicksj — Fri, 03 Oct 2008 18:55:33 GMT

prabhakar,

Thank you for putting this appliance together! Nothing like installing a redundant, load shared infrastructure in under an hour.

Now for some testing. While I can see that taking down one VM (or just dropping pen on the primary vrrp node), things failover to the other hercules node just fine... I'd like a way to check the status of the active vrrpd & pen services. Doesn't seem to be much available from the /bin/pen & /sbin/vrrpd commands. I guess I'll have to go read docs or something

Cheers!

Edit: I just found penctl, and that helps. I then compiled pen on one of my network management boxes and can use penctl.cgi to remotely monitor pen's status.

Re: Hercules Load Balancer Virtual Appliance

soudertech — Wed, 20 Aug 2008 11:54:16 GMT

I am having the same issue!

William D. Souder
Director, Network Operations
Information Security Officer

Office for Information Technology
Berry College

706.236.5099 (o)
706.676.4205 (m)
706.238.7880 (f)

This message was sent from a BlackBerry wireless device, please excuse any typos and brevity.

Re: Hercules Load Balancer Virtual Appliance

Botux — Wed, 20 Aug 2008 11:43:50 GMT

Hi,

I have ESX 3.5 too and I can't install Hercules on my ESX 3.5.0

I have installing Workstation (Evalutation) to import Hercules from torrents to ESX but I have an "error internal" to wizard.

And when I trying to "vmkfs-tools -i", I have an "error" because the hard is IDE and not SCSI. but I don't know how to do it !

I have read all the POST but .... can you help me please

Thanks

JCB

Re: Hercules Load Balancer Virtual Appliance

ltbltbltb — Sun, 17 Aug 2008 09:47:28 GMT

Hi,
I have a small issue when running this on ESX 3.5.

My setup:
2 Windows servers running IIS (iis001 and iis002)
2 Hercules load balancers.

If I don't enable vrrp the load balancers work with no problems, but the instant I start vrrp the master goes offline.

I can ping the slave IP, but not the master and the vrrp address

on the master I get:

hercules user.warn syslog: VRRP ID 19 on eth0: 10.197.207.55 is down, we are now the master

If I reboot the master I get this in the slave (wich then takes the master role, and goes offline)

hercules user.warn syslog: VRRP ID 19 on eth0: 10.197.207.54 is down, we are now the master

I have tried running the Hercules VMs on VMWare Workstation and they work here.

my PEN start script:

#!/bin/sh
#startup script for pen

LOGFILE1=/var/log/pen1.log
PIDFILE1=/var/run/pen1.pid
CONTROLPORT1=8888

VIRTUAL_ADDR="10.197.207.80"
VIRTUAL_ID=19
CHROOTDIR=/chroot/pen

LBSERVER1=80
SERVER1=10.197.196.98:80
SERVER2=10.197.196.80:80

case "$1" in
start)
echo -n "Starting VRRP: "
vrrpd -i eth0 -v $VIRTUAL_ID $VIRTUAL_ADDR
echo "OK"
if -x /bin/pen; then
echo -n "Starting pen: "
/bin/pen -C $CONTROLPORT1 -X -l $LOGFILE1 -p $PIDFILE1 $LBSERVER1 $SERVER1 $SERVER2
echo "OK"
fi
;;

stop)
kill `cat /var/run/pen1.pid`
killall vrrpd
;;

*)
echo "usage: $0 { start | stop}" >&2
exit 1
;;

esac

Any ideas much appreciated.

Re: Hercules Load Balancer Virtual Appliance

soudertech — Mon, 11 Aug 2008 14:58:02 GMT

Can this be loaded as a VM?

Re: Hercules Load Balancer Virtual Appliance

soudertech — Mon, 11 Aug 2008 14:55:16 GMT

Prabhakar,

Can this vm be optimized to run as a vm? We have a small load balancing project that we need up and going by next week - can you offer any fee based help?

Re: Hercules Load Balancer Virtual Appliance

RalphieNL — Tue, 15 Jul 2008 13:42:05 GMT

Hi all,

I got a little problem with displaying the correct X-Forwarded-For header in http requests option. (the -H switch). The LB has a static IP (192.168.100.140) and is in front of 4 apache2 webservers. Even with the -H switch I still see the internal IP address of the LB in the Apache logfiles, instead of the external IP of the client visiting the site.

Anybody got an idea?

Below is my startup, maybe the -H isn't in the correct place?

Kind regards,

Ralphie

PIDFILE=/var/run/pen.pid
PIDFILE2=/var/run/pen2.pid
CONTROLPORT=8888
CONTROLPORT2=8889
CHROOTDIR=/chroot/pen
LBSERVER=www
LBSERVER2=192.168.100.140:443
SERVER1=192.168.100.130
SERVER2=192.168.100.131
SERVER3=192.168.100.132
SERVER4=192.168.100.133
case "$1" in

start)
if ~~-x /bin/pen~~ ; then
echo -n "Starting pen: "
/bin/pen -C $CONTROLPORT -X -H -l $LOGFILE -p $PIDFILE $LBSERVER $SERVER1 $SERVER2 $SERVER3 $SERVER4

echo "OK"
fi
if ~~-x /bin/pen~~ ; then
echo -n "Starting pen: "
/bin/pen -C $CONTROLPORT2 -X -H -l $LOGFILE2 -p $PIDFILE2 192.168.100.140:443 $SERVER1 $SERVER2 $SERVER3 $SERVER4

echo "OK"
fi

;;

stop)
kill `cat /var/run/pen.pid`
kill 'cat /var/run/pen2.pid'
;;

*)
echo "usage: $0 { start | stop }" >&2
exit 1
;;

esac

Re: Hercules Load Balancer Virtual Appliance

yurasuka — Thu, 01 May 2008 10:40:34 GMT

Hi there

Brilliant idea! I do have one question though, does Hercules offer session persistence?

Thanks
y

Re: Hercules Load Balancer Virtual Appliance

vmwareeval — Sat, 12 Apr 2008 16:34:07 GMT

@stevent77: I think he posted a direct link to the app download (as well as ESX versions) about 5 posts down on the first page of this thread, so you don't have to user torrent. Hope that helps.

Re: Hercules Load Balancer Virtual Appliance

stevent77 — Thu, 06 Mar 2008 14:08:45 GMT

I have been trying to download this appliance for a couple of days now with no success. There are no seeders for it. Can anyone here email it to me? My email is stevent76@gmail.com. Thanks in advance.

Re: Hercules Load Balancer Virtual Appliance

stb74 — Mon, 04 Feb 2008 12:57:22 GMT

I have the appliance running as per Hoppa66 instructions and all seems fine, apart from it not keeping the static IP address on reboot.

I have set this up to run as a load balancer for 2 proxy servers, but all my traffic still wants to go to one server, is there any way that this can be changed and actually force the balance between the two servers.

Cheers

Re: Hercules Load Balancer Virtual Appliance

briearn — Tue, 15 Jan 2008 13:36:26 GMT

Hi Sean,

I have a similar (may be the same) problem.

It seems as if there is a BUG in static IP assignment process. You can not set a default gateway while booting.

Check your console messages for something like that:

route: SIOCADDRT: File exists

and you can check with netstat -rn if the default gw was set.

Cheers,

Arne

Re: Hercules Load Balancer Virtual Appliance

markboon — Fri, 07 Sep 2007 21:08:59 GMT

I cannot seem to get this to work to only a single web server.

I am running a webserver in a vmware instance on 192.168.199.128. I can succesfully ping both the webserver and hercules from the client that is running both vmware instances and both vmware instances can succesfully ping each other.

I can also access succesfully the webserver via http://192.168.199.128:9080 from the client machine, but from hercules\pen I cannot get it to work.

I am using the following command:
/bin/pen -C 8888 -X -p /var/run/pen.pid 80 192.168.199.128:9080 -f -d -S 1

and it returns the following error in de pen.log when accessing hercules via http from the client:

2007-09-07 11:08:20: Client 192.168.199.1 has index -1
2007-09-07 11:08:20: lookup_client returns -1
2007-09-07 11:08:20: Trying server 0 at time 1189184900
2007-09-07 11:08:20: match_acl(0, 29862080)
2007-09-07 11:08:20: Server 0 failed, retry in 30 sec: Connection refused
2007-09-07 11:08:20: Couldn't find a server for client

any hints or thoughts where to look?

Re: Hercules Load Balancer Virtual Appliance

8i5 — Fri, 17 Aug 2007 14:57:28 GMT

Did you ever get load balancing working with citrix? I am trying to do the same but with 2 citrix front end web servers. The problem I get is that only the first connection is redirected to the web server. All subsequent connections from different computers get "page cannot be displayed". If the load balancer is restarted another computer can connect, but no longer the first etc. etc.
Does anyone know what would cause the only one connection to be passed onto the webserver and not a second?

Re: Hercules Load Balancer Virtual Appliance

enixus — Wed, 01 Aug 2007 12:44:25 GMT

Thx for this fantastic app!!! if you want to "feel" it work... come by at http://aricars.eu

One question though: has anyone integrated IPTABLES yet? Wouldnt that be a great addition to a Load Balancer?

Thx again!

Michael

Re: Hercules Load Balancer Virtual Appliance

brugh — Fri, 20 Jul 2007 22:28:20 GMT

looks cool for it's size . does it know microsoft's session directory though? the NLB options there are horrible and this appliance would help tremendously.

Re: Hercules Load Balancer Virtual Appliance

ace95 — Mon, 16 Jul 2007 18:23:25 GMT

OK I am new to linux and have never worked with pen before.

Basically what I am looking to do is have distribute http requests.

I want to give the ip address of this load balancer and have it redirected to two web servers on port 80 but I have no idea how to accomplish this.

I have tried the following command

pen -l pen.log -p pen.pid lbhost:80 host1:80 host2:80 as I found in the pen HOWTO

http://siag.nu/pen/howto.shtml

I have also tried using the config file in the forum at the end of page 4 but I just keep getting page cannot be displayed or a file list of the load balancer?

Anyone who has set this up in this way please help!

Re: Hercules Load Balancer Virtual Appliance

Sean Cottrell — Thu, 21 Jun 2007 17:41:24 GMT

Weird, I changed it back to DHCP, ping worked. Chenaged it back to static, now Ping works.

Thanks for the Help. Now to configure pen....

Re: Hercules Load Balancer Virtual Appliance

Matt Ghantous — Thu, 21 Jun 2007 17:19:13 GMT

Make sure you have the correct gateway and netmask.

Did DHCP work? If it does, what does ifconfig say when you are connected with a DHCP address?

If this is a networking problem it may be in the scope of another forum.

Re: Hercules Load Balancer Virtual Appliance

Matt Ghantous — Thu, 21 Jun 2007 17:03:30 GMT

Yes. VMFS expands the disk to it's full size (hence "flat" at the end of the name). This is mostly to ensure that a 100MB disk will actually be guaranteed the full 100MB.

Workstation is not generally considered production so it is ok to have the disk expand (and contract) as you need it, without the guarantee. You are able to shrink Workstation VM's with VMware tools but VMWare tools for ESX has this feature disabled.

Re: Hercules Load Balancer Virtual Appliance

Sean Cottrell — Thu, 21 Jun 2007 16:09:25 GMT

I preformed the steps outlined to set a static IP. Restart the network. Even rebooted the VM. I can not ping the VM. Any thoughts?

Tried to ping from the Hercules VM, recieved the following:

PING 172.18.18.1 (172.18.18.1): 56 data bytes
ping: sendto: Network is unreachable.

My config in interfaces looks like this:

iface eth0 inet static
address 172.18.18.228
netmask 255.255.255.0
gateway 172.18.18.1

Message was edited by:
Sean Cottrell

Re: Hercules Load Balancer Virtual Appliance

Sean Cottrell — Thu, 21 Jun 2007 16:08:05 GMT

Thank you. I was able to ge the VM to boot after doing the Import.

One note, afte the import it converted the new -flat.vmdk to 100mb,

Thanks again.

Re: Hercules Load Balancer Virtual Appliance

Matt Ghantous — Thu, 21 Jun 2007 15:32:31 GMT

Hi Sean,

You can see Hoppa66's post a couple pages back on how to do this.

Basically you need to "import" the vmdk file from workstation format to VMFS format so that ESX can use it.

vmkfstools -i /vmimages/Hercules.vmdk /vmfs/volumes/<SANvolume>/<VM directory>

After you do this, the easiest thing to do is create a new VM and "use existing virtual disk" that you just "imported".

(FYI: To reverse a VM from VMFS to workstation format you use vmkfstools -e, which stands for export)

Re: Hercules Load Balancer Virtual Appliance

Sean Cottrell — Thu, 21 Jun 2007 15:01:46 GMT

OK. I am gonna play dumb here. Downloaded Hecules-SCSI-ESX3.zip. Extracted the files to a windows share. WinSCP'ed the files to a new folder on a LUN under vmfs/volumes. Now what?

I created a new VM via VC, using Ohter Linux for the OS,called LB. Then PuTTY'ed to the host and navigated to the vmfs/volumes and CP the Hercules file, overwriting the new VMs files. such as .vmx, .vmsd, vmdk.
And of course I tried other things as well.

I can't seem to get this VM to boot. If this is for ESX3 why is there no -flat.vmdk file?

Ok

So what is the proper steps to get Hercules VM into the ESX3 enviroment? Obviously, I am doing something completely wrong here.

Thanks for the help in advance

Re: Hercules Load Balancer Virtual Appliance

Sam999 — Wed, 20 Jun 2007 23:59:39 GMT

Cool load balancer, how many concurrent connections and/or sessions can Hercules handled?

Re: Hercules Load Balancer Virtual Appliance

prabhakar — Mon, 21 May 2007 20:59:59 GMT

Matts right. To compare vmware-tools you do need the compiler and friends. You might also need other libraries/.so files for the actual compile. Also I have never understood exactly what installing vmware-tools will give us in this case. So it may not be worth the hassle.

On a related note, I would like to get all your opinions on something I have been mulling over. I am thinking very seriously about building a new load balancer appliance based on the regular glibc. The busybox/uclibc works mostly but is harder to get going and painful to update. I am thinking in terms of building a stripped down glibc based linux appliance along with a UI for setting it up and managing it, alerts, statistics, and reporting. This will of course not fit in a 3 MB version. I am thinking along the lines of about 20-25MB, and selling it for about $50-75 with a years worth of free upgrades and forum support. I would also like to create a vmware appliance and a usb key version of the load balancer.

This will enable me to focus and build an appliance that is really what you guys need. Does this make sense or am I missing something? Will anyone of you be interested in something like this? If you want to contact me offline, you are welcome to email me - prabhakar at chaganti.net.

thanks

Re: Hercules Load Balancer Virtual Appliance

Matt Ghantous — Thu, 17 May 2007 16:18:56 GMT

gguntz,
I don't think there is support for cd rom in the kernel. You could mount the files you need on a different machine and copy them over with scp or put them on a webserver and use "wget".

However, vmware-tools will want to compile its modules with gcc which is also not in the Hercules image.

All,
My knowledge is patchy on the subject. I keep reading that the network module from vmware-tools gives "enhanced networking" but cannot find any decent documentation on what exactly the enhancement is. Are we going from 10Mbits to 1Gbit when the new module is installed? Is it worth it to go through all the trouble to get it installed ?

The Hercules NIC is performing wonderfully for my needs, but maybe if the enhancement is large some users will be interested.

Prabhakar,
Did you have any intentions of trying to compile vmware tools into the image?
I'm not sure if ESX uses different vmware tools then workstaion (I think so).

Also what would be the best way to go about that? Add cdrom support, install gcc and the kernel headers in the image and let users compile their own tools? I fear this may bloat the image. The other option would be to compile the vmware network module into the image with uClibc, which may or may not be an easy task and there are different versions for workstation and ESX.

Re: Hercules Load Balancer Virtual Appliance

KevMc — Thu, 17 May 2007 05:43:00 GMT

Great piece of software, never really been a guru of nix based platforms, but seemed easy enough to set up. I currently have it set up with two NICs with an IP Bound to each NIC, I was just wondering if it was possible to have one NIC have multiple addresses that PEN can then load balance?

Also I haven't been able to see any thing, that would allow you to drain all connections to one of the balanced servers so you can take it down without affecting the end users?

Many Thanks for your HIA.

Re: Hercules Load Balancer Virtual Appliance

pencer — Thu, 10 May 2007 14:35:13 GMT

I'm having the same problem as pgomer.

I have two physical servers, each with two virtual hercules, all listening on a single vrrpd ip.

If i start them up it all works fine. The LB's all listen on the vrrpd ip, respond and pass on to the next devices as it should.

If i leave the LB's on but idle, after a while they stop passing the traffic on.

If i try to access the vrrpd ip or the LB's ip direct i get a page cannot be displayed error.

If i restart any of them it works again fine?

Re: Hercules Load Balancer Virtual Appliance

pencer — Wed, 09 May 2007 07:43:30 GMT

Thanks for that g,

We'll be testing it next week so I'll let people know how it works with Citrix.

Cheers,
Andy.

Re: Hercules Load Balancer Virtual Appliance

gguntz — Wed, 02 May 2007 12:38:37 GMT

The answer is yes and no. In most scenerios it will remain sticky, however if a user is logged into an application and the server that they are sent to goes down or becomes unavailable they will be sent to another server in the farm. This situation should be rare, but might occur. I would think the user would get an error and they would have to start a new session at that point. An issue is going to exist no matter if you use a purely sticky solution or this one. The only difference maybe in how your application handles being transfered to a different sever in the farm instead of the connection just going away like in a traditional sticky solution. I have include the exact language for your information below.
HTH
g

According to http://siag.nu/pen/
The load balancing algorithm keeps track of clients and will try to send them back to the server they visited the last time. The client table has a number of slots (default 2048, settable through command-line arguments). When the table is full, the least recently used one will be thrown out to make room for the new one.

This is superior to a simple round-robin algorithm, which sends a client that connects repeatedly to different servers. Doing so breaks applications that maintain state between connections in the server, including most modern web applications.

When pen detects that a server is unavailable, it scans for another starting with the server after the most recently used one. That way we get load balancing and "fair" failover for free.

Correctly configured, pen can ensure that a server farm is always available, even when individual servers are brought down for maintenance or reconfiguration. The final single point of failure, pen itself, can be eliminated by running pen on several servers, using vrrp to decide which is active.

Re: Hercules Load Balancer Virtual Appliance

gguntz — Wed, 02 May 2007 12:25:35 GMT

Is it recommended to installed vmware tools? I have attempted to install, but so far no luck. I am running this on ESX3.0.1. I added a cdrom via virtual center. I pointed it to the linux.iso inside the vmware tools directory. I created a /mnt/cdrom directory. I then attempted to mount the cdrom from the usual places and no joy. I checked in virtual center and apparently in ver 2 you lose the ability to specify whether the cdrom is SCSI or IDE. It is always ide from what I can tell. I then checked the /boot/config-2.6.17.7 and apparently unless I am misreading the file there is no configuration specified for IDE.

Do I need to even worry about vmware tools? What is the required method for installing it?

g

Message was edited by:
gguntz

Re: Hercules Load Balancer Virtual Appliance

pencer — Tue, 01 May 2007 12:44:22 GMT

Does anyone know if pen is sticky?

I'm going to use it to load balance between two Citrix Access Gateway servers but a requirement is that the load balancer is sticky?

Any help appreciated.

Re: Hercules Load Balancer Virtual Appliance

pgomer — Mon, 16 Apr 2007 20:59:41 GMT

Has anyone had problems with the virtual machine not responding after a period of inactivity?

Re: Hercules Load Balancer Virtual Appliance

VMSysProg — Thu, 05 Apr 2007 03:13:07 GMT

Yet Another Wasted VM Applet

BAN BITTORRENT!!!!

I hope VMware drops all VM Applets that use torrent.

Re: Hercules Load Balancer Virtual Appliance

prabhakar — Wed, 21 Feb 2007 14:56:50 GMT

Thank you very much for trying out hercules. Glad you have it working. I will certainly incorporate your changes into the next version of hercules.

thanks

Re: Hercules Load Balancer Virtual Appliance

Ken.Cline — Sat, 17 Feb 2007 19:52:11 GMT

Hoppa66 --

I want to thank you for sharing your knowledge! These forums are a great place where people are able to get answers to some really strange questions - and it's all because of people like you. You've posted only four times, all in this thread, but the quality of information you've shared is very high.

Please stick around and continue to share...we need people like you to maintain the quality of these forums.

KLC
User Moderator

Re: Hercules Load Balancer Virtual Appliance

Hoppa66 — Sat, 17 Feb 2007 19:27:25 GMT

Prabhakar,

Thx for this wonderfull little piece of working stuff; have it working within 2 hours on ESX3, though needed some changes specific for the ESX3 environment ...

Perhaps you would like to take these changes in consideration for your next deployment of Hercules? I've posted my findings before this one ...

CU

Re: Hercules Load Balancer Virtual Appliance

Hoppa66 — Sat, 17 Feb 2007 19:24:54 GMT

And last but not least, an /etc/init.d/pen with vrrp inside and setup for multiple virtuals and multiple services/ports.

#!/bin/sh
#
# moudsen@allshare.nl

PIDDIR=/var/run
PIDFILE1=/var/run/pen1.pid
PIDFILE2=/var/run/pen2.pid

VIRTUAL1_ADDR="10.1.8.21"
VIRTUAL1_INSTANCE=1
VIRTUAL1_PRIORITY=100

PEN_CHROOTDIR=/chroot/pen

PEN1_CPORT1=8888
PEN1_LBSERVER=80
PEN1_PIDFILE=$PIDDIR/pen_1.pid

PEN2_CPORT2=8889
PEN2_LBSERVER=443
PEN2_PIDFILE=$PIDDIR/pen_2.pid

SERVER1=10.1.3.84
SERVER2=10.1.3.85

case "$1" in

start)
if [ -x /sbin/vrrpd ] ; then
echo -n "Starting vrrpd ($VIRTUAL1_ADDR): "
/sbin/vrrpd -f $PIDDIR -n -i eth0 -v $VIRTUAL1_INSTANCE $VIRTUAL1_ADDR
echo "OK"
fi

if [ -x /bin/pen ] ; then
echo -n "Starting pen (*:$PEN1_LBSERVER): "
/bin/pen -C $PEN_CPORT1 -X -p $PEN1_PIDFILE $PEN1_LBSERVER $SERVER1 $SERVER2
echo "OK"
fi

if [ -x /bin/pen ] ; then
echo -n "Starting pen (*:$PEN2_LBSERVER): "
/bin/pen -C $PEN_CPORT2 -X -p $PEN2_PIDFILE $PEN2_LBSERVER $SERVER1 $SERVER2
echo "OK"
fi
;;

stop)
if [ -x $PEN1_PIDFILE ] ; then
kill `cat $PEN1_PIDFILE`
fi

if [ -x $PEN2_PIDFILE ] ; then
kill `cat $PEN2_PIDFILE`
fi

killall vrrpd
;;

*)
echo "usage: $0 { start | stop }" >&2
exit 1
;;

esac

Re: Hercules Load Balancer Virtual Appliance

Hoppa66 — Sat, 17 Feb 2007 19:14:15 GMT

Little extra to spare about 150Mhz of CPU power when running on ESX 3:

- Add "noapic nolapic clock=pit" to the kernel entry, example:

kernel /boot/vmlinuz-2.6.17.7 root=/dev/sda1 rw quiet splash noapic nolapic nosmp clock=pit

Cheers,

Mark

Re: Hercules Load Balancer Virtual Appliance

Hoppa66 — Sat, 17 Feb 2007 14:32:03 GMT

Hi,

Just tried to use the supplied vmdk on my iSCSI/SAN based ESX farm, but when creating the VM, I could not locate the .vmdk file (whilst I copied it there).

Steps to solve this (save you at least my headache):
-1- Copy .vmdk from the .zip file to /vmimages/Hercules.vmdk on any ESX server (must be on local SCSI disk, not on shared VMFS volumes!)
-2- Create /vmfs/volumes/<SANvolume>/<VM directory> on that server
-3- Use vmfstools to convert from standard VMFS format to large VMFS format:
vmfstools -i /vmimages/Hercules.vmdk /vmfs/volumes/<SANvolume>/<VM directory>
-4- Create the virtual machine with name <VM directory>; this puts the stuff in 1 directory
-5- Create the virtual machine
-6- When powering up, ESX might ask you to change SCSI types automatically. Select "Yes" to use the correct SCSI controller type
-7- Delete the copied .vmdk on the local disk you where working on

This is probably something related to iSCSI related installations only ...

Cheers,

Mark

Re: Hercules Load Balancer Virtual Appliance

pencer — Fri, 22 Dec 2006 13:08:24 GMT

It's ok, i've figured out what i did wrong!

Needed to create the VM with Buslogic instead of LSIlogic interface.

Works fine now.

Re: Hercules Load Balancer Virtual Appliance

pencer — Wed, 20 Dec 2006 15:09:24 GMT

Is there a way to get this working on VMware Server?

We have a couple of oldish HP Proliants that I've put the free VMWare Server on.

This app would be useful on there.

I've tried copying the hercules files across to it and registering an exisitng machine. But when I start the VM I just get a blank screen?

Re: Hercules Load Balancer Virtual Appliance

briearn — Tue, 14 Nov 2006 16:29:59 GMT

in /var/log/messages is nothing special. No problem occurs.

BUT: I have a snapshot where all of your VMs crash. This happens from time to time after a while. One after the other...

Re: Hercules Load Balancer Virtual Appliance Stats

prabhakar — Fri, 03 Nov 2006 19:55:56 GMT

Sorry, have never used the -w param. Have you tried checking the pen users list for any more info?

Re: Hercules Load Balancer Virtual Appliance

prabhakar — Fri, 03 Nov 2006 19:50:54 GMT

Can you post what kind of errors you are seeing? Like Matt said check your /var/log/.

Re: Hercules Load Balancer Virtual Appliance

Matt Ghantous — Tue, 24 Oct 2006 15:57:06 GMT

briearn,

Do you see errors in /var/log/messages?

Re: Hercules Load Balancer Virtual Appliance

briearn — Fri, 20 Oct 2006 13:34:29 GMT

Hi prabhakar,

1st of all: Great work! Cool to have an very easy to use small image for an LB.

You can even handle other protocols like ssh and CIFS when you balance on the right ports. I've missed this info in the documentation on the VMWARE site. Could be very useful for others as well ...

Unfortunately I have a big problem with the stability of the system when I use it with VMWARE-Server 1.0.1. Every couple of Minutes I get an kernel crash. Don't know why...

And the strange thing is: vrrpd seems to be buggy at all. I can balance without this one running, but when I try to start this one nothing is working anymore. Even no complain or an error. It does simply nothing further and I have to reboot to get it working again. The whole VM is freezed.

May be you have a solution on that.

BTW I'm running it on a SUN X4100 2xOpteron 285 16GB RAM with FC5 and on that VMware-Server 1.0.1

Thanks mate,
Arne

Re: Hercules Load Balancer Virtual Appliance Stats

torcomp — Thu, 19 Oct 2006 17:06:18 GMT

Has anyone tried to use the -w param on the pen startup script?
from the PEN docs, -w filename wil post the pen.log output in HTML format to the specified file.

Can't seem to get it to work.

Any help is appreciated.
Cheers,
Tony.

Re: Hercules Load Balancer Virtual Appliance

vmmeup — Wed, 18 Oct 2006 13:52:31 GMT

1.) Yeah this is a new subnet so none of the IP's are in use, but I had checked it just to be sure.

2.) 192.168.10.x I don't give these machines gateways. The only purpose of this subnet is to sit behind the load balancer with the web servers on it.

If I load up the load balancer and go to the physical address of the box 192.168.5.101 it works great no problems what so ever. I'm running vrrpd on the 192.168.5.x network because that is the one the firewall nats to.

3.) I have tried vrrpd with and without the -n flag doesn't seem to make a difference.

I thank you much for your help, it's got to be something so simple that I'm over looking, just can't put my finger on it.

Re: Hercules Load Balancer Virtual Appliance

Matt Ghantous — Wed, 18 Oct 2006 13:04:06 GMT

Hmm... I can think of a couple things to try.

1.) This may sound silly, but try to ping 192.168.5.100 before enabling vrrpd to make sure another machine doesn't have it.

2.) Do 192.168.5.100 and 192.168.10.200 use the same gateway? I'm not sure if that matters and I'm not in the lab to test it out. Try using a vrrpd address like 192.168.10.202

3.) Try vrrpd with the -n flag (don't handle virtual mac address).

Hope that helps, let us know how it goes.

Re: Hercules Load Balancer Virtual Appliance

vmmeup — Mon, 16 Oct 2006 13:26:40 GMT

I'm trying a similar setup and can't seem to get pen to listen on the vrrp virtual IP address. I have configured both hercules boxes the same, I can ping the vrrp virtual IP but cannot get pen to load balance over it. I have my hercules boxes dual homed and they load balance and work great with their assigned IP addresses. Here is what my config looks like below:

PIDFILE=/var/run/pen.pid
PIDFILE2-/var/run/pen2.pid

CONTROLPORT=8888
CONTROLPORT2=8889

CHROOTDIR=/chroot/pen

VRRP_IP=192.168.5.100
VSERVER_ID=1

LBSERVER=80
LBSERVER2=443

SERVER1=192.168.10.200
SEVRER2=192.168.10.201

case "$1" in

start)
echo -n "Starting VRRP Cluster Service: "
/sbin/vrrpd -i eth0 -v $VSERVER_ID $VRRP_IP
echo " [OK]"

if [ -x /bin/pen ] ; then
echo -n "Starting LB on Port 80: "
/bin/pen -C $CONTROLPORT -X -l $LOGFILE -p $PIDFILE $LBSERVER $SERVER1 $SERVER2
echo " [OK]"

fi
if [ -x /bin/pen ] ; then
echo -n "Starting LN on Port 443 "
/bin/pen -C $CONTROLPORT2 -X -l $LOGFILE -p $PIDFILE2 $LBSERVER2 $SERVER1 $SERVER2
echo " [OK]"
fi
;;

stop)
echo -n "Halting LB on Port 80: "
kill `cat /var/run/pen.pid`
echo " [OK]

echo -n "Halting LB on Port 443: "
kill `cat /var/run/pen2.pid`
echo " [OK]"

echo -n "Halting VRRPD Cluster Deamon: "
killall vrrpd
echo " [OK]"
;;

*)
echo "usage; $0 { start | stop }" >&2
EXIT 1
;;

Re: Hercules Load Balancer Virtual Appliance

Matt Ghantous — Fri, 13 Oct 2006 21:08:03 GMT

So here's an update on what I've been doing with ESX and Hercules testing:

I have two IIS 6.0 web servers running on Windows Server 2003 SP 1 VM's. They both have static IP's and are called WEBTEST01 and WEBTEST02.

Next, I set up two Hercules VM's (to get the vmdk from a workstation to an ESX version see http://kb.vmware.com/vmtnkb/search.do?cmd=displayKC&docType=kc&externalId=900&sliceId=SAL_Public(

I called the VM's Hercules01 and Hercules02. Their "real" IP's are irrelevant, so I just left them with their default DHCP setup. What is important is that they are sharing a static VRRP address.

I've had this up and running for days now, and both instances of Hercules are barely using a couple megs of ram. I'm going to get some stress test automation tools and beat Hercules up a bit (and hopefully not get IT to come and kill me).

To mirror IIS 6.0 servers I realized I had to both mainatin the same files and the same IIS settings. My solution was to use a little batch script with iiscnfg.vbs /copy. You can read up more on that, but basically that command lets you copy IIS settings over a network to another server. Every time I change IIS settings on WEBTEST01 I just run the batch file. To mirror files/permissions/securities I am using robocopy as a service with the /MIR and /COPYALL flags.

I'll let you know what happens when I get around to stress testing Hercules. Haven't googled much yet on this, but does anyone know of any good tools to use for this kind of automation?

Anyways, it's 5 o' clock on a Friday here... Time for some beers.

Re: Hercules Load Balancer Virtual Appliance

vmmeup — Fri, 13 Oct 2006 20:22:50 GMT

Is vrrpd package no built into your kernel 2.6.17.7 release? I might be crazy, but I can't find it on there any where..... definatly not in /bin

never mind it's in /sbin I was reading the post and someone made a script poitning to /bin.....sorry

Message was edited by:
vmmeup

Re: Hercules Load Balancer Virtual Appliance

vmmeup — Fri, 13 Oct 2006 14:51:17 GMT

You are the man.....thank you for the help.....I love this forum.......

Re: Hercules Load Balancer Virtual Appliance

Matt Ghantous — Fri, 13 Oct 2006 13:31:36 GMT

Oops forgot to answer your other question...

Adding a second NIC is easy. Power down the VM, add the virtual NIC, reboot. In the OS just add it to /etc/network/interfaces like you did for eth0, only the second card will be called eth1. Just increment the number for each NIC you add. If you have 3 NICs then call them eth0, eth1, and eth2.

Here's a DHCP example for a second NIC:

auto lo eth0 eth1
[...]
iface eth1 inet dhcp

For a static example, see my last post

To test it run ifup eth1. Then do ifconfig, and you should see your shiney new interface with an IP address.

Re: Hercules Load Balancer Virtual Appliance

Matt Ghantous — Fri, 13 Oct 2006 12:40:01 GMT

Here's an example of /etc/network/interfaces with a static IP for eth0:

iface eth0 inet static
address 192.168.1.123
netmask 255.255.255.0
gateway 192.168.1.1

then run /etc/init.d/network restart

Re: Hercules Load Balancer Virtual Appliance

vmmeup — Thu, 12 Oct 2006 22:59:27 GMT

I might sound like an idiot asking this question, but what is the proper syntax for assigning a static IP to this appliance. I see the /etc/network/interface config file. The default is dhcp. I want to change it to static, but I want to make suer I use the right syntax. I generally use redhat, fedora, or suse which has a different style interface configuration. Would I just do something like this:

iface eth0 inet 192.168.1.x 255.255.255.0

also I'm looking to dual home the box and I added a second NIC, but the os isn't picking it up for me to use. Suggestions on what I need to do?

Message was edited by:
vmmeup

Re: Hercules Load Balancer Virtual Appliance

prabhakar — Sun, 08 Oct 2006 19:32:19 GMT

Havent worked much with IIS, and everytime I did work with it, it was extremely frustrating. So i havent tried any of this with IIS. But you seem to be making great progress, and we would love to hear how your experiments go.

prabhakar

Re: Hercules Load Balancer Virtual Appliance

Matt Ghantous — Fri, 06 Oct 2006 14:52:52 GMT

Has anyone got Hercules balancing Microsoft IIS servers? If so, what is your setup?

Doing an official test with Hercules in our data center!

Here's my setup with 4 virtual machines on ESX 3:
LB01 and LB02 sharing a VRRP IP address to balance two IIS web servers, WEBSERVER01 and WEBSERVER02.

I got that going and I hope to have WEBSERVER01 and WEBSERVER02 serving web content from same physical volume on our SAN.

Kind of fumbling around in the darnkess with the windoze stuff and trying to mirror IIS, but I'll let you know how it goes!

Re: Hercules Load Balancer Virtual Appliance

prabhakar — Tue, 26 Sep 2006 16:11:36 GMT

Thank you Matt. And a big thanks for your help in the esx versions.

-prabhakar

Re: Hercules Load Balancer Virtual Appliance

Matt Ghantous — Tue, 26 Sep 2006 12:43:12 GMT

Prabhakar, good working with you and congrats on the Honorable Mention Status for Hercules and the Communitiy Choice Prize for Hermes. I'll have to check that one out!

Re: Hercules Load Balancer Virtual Appliance

prabhakar — Mon, 25 Sep 2006 16:14:55 GMT

I am not aware of any connection limit. There are log files that are created in /var/log, but i have not run into the case where they become large enough to max out the hard drive.

Re: Hercules Load Balancer Virtual Appliance

prabhakar — Mon, 25 Sep 2006 15:55:00 GMT

Apologies for the delay in replying to some of the recent postings. I have been very busy with work, as we have a major release in two weeks, and a trade show demo. I am planning on updating the hercules and hermes appliances, and also have some other ideas for enhancements to them.

thanks for checking out these appliances and for your feedback.

-prabhakar

Re: Hercules Load Balancer Virtual Appliance

prabhakar — Mon, 25 Sep 2006 15:52:18 GMT

The vrrpd binary is not in the bin folder. It is probably in one of the sbin folders. I am not at my laptop right now, but i will check and let you know for sure.

Re: Hercules Load Balancer Virtual Appliance

CPM — Fri, 15 Sep 2006 18:53:54 GMT

Does anyone know the connection limit to hercules, also does anyone also know if hercules creates log files which might max out the hard drive?

Thanks in advance.

Chris

Re: Hercules Load Balancer Virtual Appliance

XRayCharlie15 — Wed, 13 Sep 2006 01:11:59 GMT

Hello,

I've downloaded the Hercules-1.3-esx3.zip from the sourceforge site and started it up.

I saw mention of vrrpd being added to it but it does not appear to be present in the /bin directory.

Where would I find vrrpd?

Regards

Re: Hercules Load Balancer Virtual Appliance

Matt Ghantous — Fri, 08 Sep 2006 18:45:33 GMT

Well what happens is /etc/init.d/S99helpmsg gets executed last (hence 99) and that finally execute /bin/hercules which echos out "You can access the help page that details......"

So two possible options for you are:
1.) rm /etc/init.d/S99* and then edit /etc/issue
2.) edit /bin/hercules

Re: Hercules Load Balancer Virtual Appliance

cdakers — Sun, 03 Sep 2006 19:02:29 GMT

Thanks, that helps. What I really want to edit is the text that says "You can access the help page that details......". I thought I saw the file when I was poking around, but can't seem to find it now.

Re: Hercules Load Balancer Virtual Appliance

Matt Ghantous — Sun, 03 Sep 2006 14:55:06 GMT

I think you want to edit /etc/issue

Re: Hercules Load Balancer Virtual Appliance

cdakers — Sat, 02 Sep 2006 23:57:56 GMT

I have the two of the latest release running in VMWare Server on W2k as fault tolerant load balancers for several web server appliances and it is working great.

Where can I edit the text that is displayed at the end of the boot sequence, just before the login prompt? I would like to edit the instructions there, as they are incorrect in my configuration. I would also like to add some additional text.

Thanks for your help! Keep up the great work.

Re: Hercules Load Balancer Virtual Appliance

prabhakar — Wed, 09 Aug 2006 11:08:52 GMT

Updated the appliance to use the latest kernel - 2.6.17.7 .

You can download it from :
http://istanbul.sourceforge.net.

-prabhakar

Re: Hercules Load Balancer Virtual Appliance

prabhakar — Tue, 08 Aug 2006 14:55:10 GMT

Very cool.

-prabhakar

Re: Hercules Load Balancer Virtual Appliance

pencer — Tue, 08 Aug 2006 14:50:16 GMT

Thats done the trick. Thanks to Matt and prabhakar for all your help.

My first virtual clustered load balanced appliances will soon be serving our NHS trust staff!

Re: Hercules Load Balancer Virtual Appliance

Matt Ghantous — Tue, 08 Aug 2006 14:33:12 GMT

in the line

/bin/pen -C $CONTROLPORT -X -l $LOGFILE -p $PIDFILE $LBSERVER $SERVER1 $SERVER2

try just putting 443 (no ip) for $LBSERVER and see if that works... I think it should.

Re: Hercules Load Balancer Virtual Appliance

pencer — Tue, 08 Aug 2006 14:27:25 GMT

I'm nearly there!

I've put the following in both my LB's pen scripts:

...
VSERVER=192.168.0.30
...
/bin/pen -C $CONTROLPORT -X -l $LOGFILE -p $PIDFILE $LBSERVER $SERVER1 $SERVER2
/sbin/vrrpd -n -i eth0 -v 1 $VSERVER

After vrrpd is started on either/both servers I can ping 192.168.0.30 but when I browse to https://192.168.0.30 I get a page cannot be displayed error?

Re: Hercules Load Balancer Virtual Appliance

prabhakar — Tue, 08 Aug 2006 13:44:26 GMT

I added vi to the appliance as it is a very small package that is ideal when you are trying to save space, and it does its job very well. But Vim is what you should really use for editing. The new version has a tabbed interface and autocomplete. It is very nice. Takes some getting used to, but will be very worthwile.

-prabhakar

Re: Hercules Load Balancer Virtual Appliance

Matt Ghantous — Tue, 08 Aug 2006 13:02:02 GMT

Well there are probably hundreds of ways this could be done more elegantly, but this is how I set up vrrpd:

Edit /etc/init.d/pen on both load balancers

VIRTUAL_ADDR="192.168.0.30"
.....
start)
/bin/vrrpd -n -i eth0 -v 1 $VIRTUAL_ADDR
.....
stop)
killall vrrpd
......

Now you got two loadbalancers listening on virtual address 192.168.0.30. If one goes down, not an issue, you have fail over! So now you have failover at the load balancer level as well as failover at your host server level. Call that paranoia! But if your services need to be 24/7 it is just an extra measure of reliability.

- Matt

PS.

vi and vim (Vi-Improved) are almost completely different editors. Prabhakar probably put vi in the distro because it is a smaller package, and suitable to fit our needs. If you are looking for a good editor with syntax highlighting for just about everything, you should take a look at vim. It runs on Windows as well. Vim is a pain to learn at first, but most people who learn it never switch back.

Message was edited by:
Matt Ghantous

Re: Hercules Load Balancer Virtual Appliance

pencer — Tue, 08 Aug 2006 12:42:18 GMT

Thanks for the help. I noticed just after I'd posted that there was a missing ; from my script after I'd edited it. One day i'll get the hang of vi!

Anyway, it all works fine now.

Would anyone like to help me set up vrrpd?

I've looked on http://siag.nu/pen/vrrpd-linux2.shtml, just not sure how to set additional IP's for each LB server before I start vrrpd.

Re: Hercules Load Balancer Virtual Appliance

prabhakar — Tue, 08 Aug 2006 10:35:19 GMT

If you do not specify the protocol as https, IE or FF will try to load the specified url as a plain http url, but at the port 443 as you specified in the URL. That wont work, and you will get a page not found error. So if you type in https://192.168.0.9, you should get the login page from the CAG.

-prabhakar

Re: Hercules Load Balancer Virtual Appliance

pencer — Tue, 08 Aug 2006 09:37:51 GMT

Thanks for the help. It's obvious now you say it but i'd totally missed the point of putting the LB server IP in!

It still doesn't work for me, but I think that's down to the appliances I'm trying to balance, we have two Citrix Access Gateways.

If in my browser (IE or FF) I type 192.168.0.10:443 for CAG1 I get a page cannot be displayed error. If I type in https://192.168.0.10 or https://192.168.0.10:443 it displays the login page.

So when I browse to 192.168.0.9:443 (my LB server) i get the same page cannot be displayed error as above?