Hi Les, Currently, there is no database or filesystem on the active system that needs to be sync'ed. Apache currently just serves up static pages. It's too early in our POC for something fancy.
Bernie -----Original Message----- From: linux-ha-boun...@lists.linux-ha.org [mailto:linux-ha-boun...@lists.linux-ha.org] On Behalf Of Les Mikesell Sent: Friday, May 29, 2009 11:25 AM To: General Linux-HA mailing list Subject: Re: [Linux-HA] How to setup a 2 node active/passive apache2 cluster for Proof of Concept Dimitri Maziuk wrote: > Bernie Wu wrote: >> The company I work for wants us to start investigating HA. >> My first POC setup was a 2 node cluster with a floating IP and that worked >> out quite well. >> Now the second POC was to work with an application, in this case, apache2 in >> a active/passive configuration. >> My question is this. Do I need to setup a third node to serve as the quorum >> node or can I work with 2 nodes. > > If your setup is v1-style active/passive, all you need to do is add > httpd to haresources line (and make sure it's not started by init). > That's for proof of concept. IRL you may want to throw in at least mon, > possibly stonith -- although I haven't seen a split brain problem in my > setup (but then again, mine usually fail over when I upgrade the kernel). Apache typically won't do anything until a request hits it, which won't happen on the machine that doesn't have the floating IP, so it isn't likely to have a split-brain issue and doesn't even matter if it is running all the time on the passive machine. However, you need to think about any state information that is updated/maintained on the active system. Is there a backend database or anything written to the filesystem that has to be kept in sync? -- Les Mikesell lesmikes...@gmail.com _______________________________________________ Linux-HA mailing list Linux-HA@lists.linux-ha.org http://lists.linux-ha.org/mailman/listinfo/linux-ha See also: http://linux-ha.org/ReportingProblems The information contained in this e-mail message is intended only for the personal and confidential use of the recipient(s) named above. This message may be an attorney-client communication and/or work product and as such is privileged and confidential. If the reader of this message is not the intended recipient or an agent responsible for delivering it to the intended recipient, you are hereby notified that you have received this document in error and that any review, dissemination, distribution, or copying of this message is strictly prohibited. If you have received this communication in error, please notify us immediately by e-mail, and delete the original message. _______________________________________________ Linux-HA mailing list Linux-HA@lists.linux-ha.org http://lists.linux-ha.org/mailman/listinfo/linux-ha See also: http://linux-ha.org/ReportingProblems
