RE: High availabilty through Apache httpd (Apache Users)

Basically, you have one IP address that is used by two hosts, active one only one at a time. If one service fails, the other node take the IP thanks to keepalived.

This works only if you’re on the same network segment.

Google on “vrrp keepalived apache” and you’ll get this first link: http://www.cyberciti.biz/faq/rhel-centos-fedora-keepalived-lvs-cluster-configuration/

From: Harsimranjit singh Kler [mailto:simran4u2@xxxxxxxxx]
Sent: Monday 6 February 2012 10:53
To: DENIS Laurent
Cc: users@xxxxxxxxxxxxxxxx
Subject: Re: High availabilty through Apache httpd

Intially i want failover setup only with two node

can you explain little about vrrp + keepalived. else some reference link how i can achive it step by step(on linux setup only)

On Mon, Feb 6, 2012 at 3:12 PM, DENIS Laurent <Laurent.DENIS@xxxxxxxxxxxxxxxx> wrote:

If you just want failover on the head apache: use two nodes with vrrp + keepalived (if you’re on linux) to monitor your service.

If you need load-balancing, then you should use two VRRP addresses with DNS round-robin. But you’ll stumble on client-server persistence problem if you don’t use tomcat clustering.

From: Jaco Kroon [mailto:jaco@xxxxxxxxx]
Sent: Monday 6 February 2012 10:24
To: users@xxxxxxxxxxxxxxxx
Cc: Harsimranjit singh Kler
Subject: Re: High availabilty through Apache httpd

Not that I'm aware of but someone else on the list may very well know something I don't.

May I inquire as to why not?

Kind Regards,
Jaco

On 06/02/12 11:17, Harsimranjit singh Kler wrote:

Its is not possible for me to use "haproxy" in my setup. Is there alternate to use with Apache only?

On Mon, Feb 6, 2012 at 2:43 PM, Jaco Kroon <jaco@xxxxxxxxx> wrote:

Hi,

Perhaps look at "haproxy" instead of apache. Run it on two or more machines with multiple IPs and have then distribute the load to your Tomcat worker nodes.

Kind Regards,
Jaco

On 06/02/12 11:09, Harsimranjit singh Kler wrote:

Hi
How i can make apache httpd High Available(HA)?.If i want to achive with out hardware based HA.
I have httpd 2.2.17 on one Phsical Node(IP xxx.xxx.xxx) and Six Tomcat worker on other 6 Phsical Node.Now if IP xxx.xxx.xxx goes down my application completly down.?
regards
Harsimran

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