Right, I see what you mean now. No, you can't do that - the service always has to run on the node where it's IP is. But you can fail over the whole resource group (IP + services) together if required. Gordan On Fri, 17 Apr 2009 14:01:05 +0200, ESGLinux <esggrupos@xxxxxxxxx> wrote: > Hi Gordan, > > I´m talking about the floating IP. (I called it service IP, is wrog the > name?) > > The real ip of the two nodes is diferent and share the floating IP but in > that scenario when one service fails (no the whole node) I get one service > in one node and one service on the other node but I get the error I posted. > > for example > floating IP + BBDD is runing on node1 > floating IP + HTTPD is running on node2 > > is this possible? > > thanks > > ESG > > > > 2009/4/17 Gordan Bobic <gordan@xxxxxxxxxx> > >> You can't have the same IP on multiple machines at the same time. That >> much should be obvious before even thinking about clustering. >> >> You can, however configure floating IPs as resources that RHCS will >> fail over between cluster nodes. Only one node will have a particular >> IP address at any one time, but if that node fails, the floating IP >> will get migrated to one of the surviving nodes. >> >> Any number of services can run on a floating IP. There is no need >> to have one floating IP per service. >> >> Gordan >> >> On Fri, 17 Apr 2009 13:23:30 +0200, ESGLinux <esggrupos@xxxxxxxxx> wrote: >> > Hi, >> > >> > thanks for your answer >> > >> > I suspected so, >> > >> > can I say as an axiom: One service needs One IP? ( One man, One vote >> > ;-) >> ) >> > >> > and if is this true, has it sense to configure ip resources as shared? >> > it >> > must be better to configure as a private resource, isnt it? >> > >> > Greetings, >> > >> > ESG >> > >> > 2009/4/17 Juan Ramon Martin Blanco <robejrm@xxxxxxxxx> >> > >> >> >> >> >> >> On Fri, Apr 17, 2009 at 12:57 PM, ESGLinux <esggrupos@xxxxxxxxx> >> >> wrote: >> >> >> >>> Hello all, >> >>> >> >>> I have a doubt about using the same service ip with two diferent >> >>> services >> >>> in two diferent nodes of my two-nodes-cluster. >> >> >> >> >> >>> >> >>> I´ll explain it a litle: >> >>> >> >>> I have two services: BBDD and HTTPD >> >>> >> >>> I have configured a shared IP: 192.168.1.100 >> >>> >> >> Hi, >> >> You _must_ use a different IP, cannot have the same IP on different >> >> machines. >> >> >> >> Greetings, >> >> Juanra >> >> >> >>> >> >>> two nodes: node1 and node2. >> >>> >> >>> When I run the two services on node1 all runs ok. If I try to >> >>> relocate >> >>> one >> >>> service, with >> >>> >> >>> clusvcadm -r BBDD -m node2 >> >>> >> >>> it fails with the error: >> >>> in.rdiscd[4805]: setsockopt (IP_ADD_MEMBERSHIP): Address already in >> use >> >>> in.rdiscd[4805]: Failed joining addresses >> >>> >> >>> I suposse that is because one services is on node1 with the ip and >> >>> the >> >>> other trys to run in node2 with the same ip. >> >>> >> >>> So my question is if it is possible to run the services this way or I >> >>> need >> >>> an ip per service? >> >>> (I have tested that with 2 diferent ips I can run BBDD on node1 an >> HTTPD >> >>> on node2) >> >>> >> >>> Thanks in advance >> >>> >> >>> ESG >> >>> >> >>> >> >>> -- >> >>> Linux-cluster mailing list >> >>> Linux-cluster@xxxxxxxxxx >> >>> https://www.redhat.com/mailman/listinfo/linux-cluster >> >>> >> >> >> >> >> >> -- >> >> Linux-cluster mailing list >> >> Linux-cluster@xxxxxxxxxx >> >> https://www.redhat.com/mailman/listinfo/linux-cluster >> >> >> >> -- >> Linux-cluster mailing list >> Linux-cluster@xxxxxxxxxx >> https://www.redhat.com/mailman/listinfo/linux-cluster >> -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
