Comments on: HA LB Cluster on CentOS5 – Without actual heartbeat :P http://bashukhan.com/ha-lb-cluster-on-centos5-without-actual-heartbeat-p/ Life's having zeros and ones all over Mon, 28 Jun 2010 14:35:24 +0000 hourly 1 http://wordpress.org/?v=3.0 By: Abbas http://bashukhan.com/ha-lb-cluster-on-centos5-without-actual-heartbeat-p/comment-page-1/#comment-689 Abbas Tue, 11 May 2010 07:23:26 +0000 http://bashukhan.com/?p=118#comment-689 Hi Taleej, That's likely because the virtual IP hasn't been terminated properly on real (web or dns) servers. You may double check step#2c of configuring real servers. If it still behaves the same, try checking and posting your ldirectord, apache and dns log files. Hi Taleej,
That’s likely because the virtual IP hasn’t been terminated properly on real (web or dns) servers. You may double check step#2c of configuring real servers. If it still behaves the same, try checking and posting your ldirectord, apache and dns log files.

]]> By: Tleej http://bashukhan.com/ha-lb-cluster-on-centos5-without-actual-heartbeat-p/comment-page-1/#comment-688 Tleej Tue, 11 May 2010 07:15:28 +0000 http://bashukhan.com/?p=118#comment-688 Hi, Thanks for sharing this. I did the same for a DNS server, and get the same output as you do, but the ldirector host does not listen on port 53 whatever I do, same thing. I tried with http, same thing... Any idea ? Thanks Hi,

Thanks for sharing this. I did the same for a DNS server, and get the same output as you do, but the ldirector host does not listen on port 53 whatever I do, same thing. I tried with http, same thing…

Any idea ?

Thanks

]]> By: Abbas http://bashukhan.com/ha-lb-cluster-on-centos5-without-actual-heartbeat-p/comment-page-1/#comment-675 Abbas Sat, 08 May 2010 13:13:15 +0000 http://bashukhan.com/?p=118#comment-675 You can use '<a href="http://linux.die.net/man/1/scp" rel="nofollow">scp</a>' to <a href="http://zedomax.com/blog/2010/02/18/linux-hack-sshscp-howtos-for-more-securefaster-linux/" rel="nofollow">copy</a> the data between the virtual host directories on both real servers (VM2 and VM3). And if the content being served is dynamic enough to change rapidly, you can setup a cronjob to '<a href="http://www.linux.com/learn/tutorials/271175-get-to-know-rsync" rel="nofollow">rsync</a>' data between two web servers regularly or as soon as it changes. And by the way, no question is stuipd. You can use ‘scp‘ to copy the data between the virtual host directories on both real servers (VM2 and VM3). And if the content being served is dynamic enough to change rapidly, you can setup a cronjob to ‘rsync‘ data between two web servers regularly or as soon as it changes.
And by the way, no question is stuipd.

]]> By: Mir http://bashukhan.com/ha-lb-cluster-on-centos5-without-actual-heartbeat-p/comment-page-1/#comment-672 Mir Fri, 07 May 2010 21:28:10 +0000 http://bashukhan.com/?p=118#comment-672 Sorry if this is a stupid question, but how do you configure the web servers (VM2 and VM3) to contain the same data? Sorry if this is a stupid question, but how do you configure the web servers (VM2 and VM3) to contain the same data?

]]> By: Abbas http://bashukhan.com/ha-lb-cluster-on-centos5-without-actual-heartbeat-p/comment-page-1/#comment-182 Abbas Sun, 21 Feb 2010 11:16:34 +0000 http://bashukhan.com/?p=118#comment-182 Grant, whats the output of ipvsadm -l? Make sure that test file test.html you've specified in ldirectord.cf is reachable on both web servers and is echoing the word "foo" in it. I've found a typo in my post above when enabling ip forwarding. Edit /etc/sysctl.conf on load balancer and make sure that the value of net.ipv4.ip_forward is 1 (not 0 as zero means disabled). Use systcl -p to reload the values then. I would also want to double check step#2 of configuring web servers if I find load balancer forwarding requests to only one web server. Grant, whats the output of ipvsadm -l? Make sure that test file test.html you’ve specified in ldirectord.cf is reachable on both web servers and is echoing the word “foo” in it.
I’ve found a typo in my post above when enabling ip forwarding. Edit /etc/sysctl.conf on load balancer and make sure that the value of net.ipv4.ip_forward is 1 (not 0 as zero means disabled). Use systcl -p to reload the values then. I would also want to double check step#2 of configuring web servers if I find load balancer forwarding requests to only one web server.

]]> By: Grant http://bashukhan.com/ha-lb-cluster-on-centos5-without-actual-heartbeat-p/comment-page-1/#comment-179 Grant Sun, 21 Feb 2010 04:13:13 +0000 http://bashukhan.com/?p=118#comment-179 I have done everything like you did but it always forwards to my second web server. When I run ipvsadm -l everything looks fine. I can access the first web server directly and it works great. But every time I use my virtual IP it just forwards to the second web server. I have done everything like you did but it always forwards to my second web server. When I run ipvsadm -l everything looks fine. I can access the first web server directly and it works great. But every time I use my virtual IP it just forwards to the second web server.

]]> By: Abbas http://bashukhan.com/ha-lb-cluster-on-centos5-without-actual-heartbeat-p/comment-page-1/#comment-49 Abbas Fri, 08 Jan 2010 11:52:01 +0000 http://bashukhan.com/?p=118#comment-49 Glad to help out! Glad to help out!

]]> By: JaR http://bashukhan.com/ha-lb-cluster-on-centos5-without-actual-heartbeat-p/comment-page-1/#comment-48 JaR Fri, 08 Jan 2010 11:50:33 +0000 http://bashukhan.com/?p=118#comment-48 This is a great job, ty for share. This is a great job, ty for share.

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