Hi Yang, I had the same issue a few weeks back, I had to change the IP address of the xCAT server and the nodes. Although you don't need to change the address of the main server but I documented everything and these are the steps I took:
### Change xCAT's Server IP Address ### ## To change the IP address of the xCAT server and the nodes, follow these steps ## 1. tabprune -a auditlog # Deletes the audit logs. 2. tabprune -a eventlog # Deletes the event logs. 3. xcatsnap -d /root/xcat_ip-change # Take a snapshot of xCAT DB. 4. lsxcatd -a # Verifry which services xCAT uses. 5. dumpxCATdb -p /root/xcat_search && cd /root/xcat_search && grep -r <Old xCAT's server IP> . # Dump xCAT tables to a directory and search for thd old IP. 6. tabedit <tables from the previous step> # Edit the tables to match the new IP address. 7. lsdef -t node -l | grep " <Old xCAT's server IP>" # Dump all information about a node and search for the old IP. *** Optional *** lsdef -t node -w conserver=" <Old xCAT's server IP>" # In case conserver is used, search for old mentioned IP address. chdef -t node cn1-cn4 conserver= <New xCAT's server IP> # Change the old Ip to the new one. *** Optional *** 8. nodels pux[1-5] hosts.ip # Verify that the new IP matches the desired one. 9. makehosts # Updated the /etc/hosts file using xCAT. 10. vi /etc/hosts # Change the server's IP address 11. service xcatd stop && service mysqld stop # Stop both services to update xCAT mysql server address. 12. vi /etc/xcat/cfgloc # Change the IP address from the old one to the new one. 13. vi /etc/sysconfig/network-scripts/ifcfg-eth1 # Change the IP of the network card. 14. service network restart # Restart the service to apply the IP change. 15. service mysqld start # Start MySQL. 16. mysql -u root -p # Log into the mySQL server as root. 17. GRANT ALL on xcatdb.* TO xcatadmin@'hostname' IDENTIFIED BY 'Password'; # To grant the new server permissions to the server. 18. service xcatd start # Start xCAT. 19. makedns -n # Create new DNS entries. 20. makedhcp -d compute # Delete the old DHCP entries. 21. makedhcp -a # Create new DHCP entries. *** Optional *** makeconservercf # Make cons server if used. *** Optional *** 22. nodeset compute boot # Regenrate the files in /tftpboot/pxelinux.cfg Hope it helps, Dennis. On Wed, Mar 26, 2014 at 2:22 PM, Lissa Valletta <lis...@us.ibm.com> wrote: > Are you just trying to change the hostname or are you also trying to > change the ip address. If ip address, then I believe reinstall will be > the best way to make sure all the system config files are set correctly. > I think you would want to reinstall just to make sure you changes really > worked, so if you have to reinstall in the future you will have no issues. > > Lissa K. Valletta > 8-3/B10 > Poughkeepsie, NY 12601 > (tie 293) 433-3102 > > > > [image: Inactive hide details for Yang BR Yan ---03/26/2014 08:08:50 > AM---Dear All, When I'm searching for a solution to change IP/host]Yang > BR Yan ---03/26/2014 08:08:50 AM---Dear All, When I'm searching for a > solution to change IP/hostname for a compute node, > > From: Yang BR Yan <yan...@cn.ibm.com> > To: "xCAT Users Mailing list" <xcat-user@lists.sourceforge.net>, > Date: 03/26/2014 08:08 AM > Subject: [xcat-user] Change node IP/hostname without reprovisioning? > ------------------------------ > > > > Dear All, > > When I'm searching for a solution to change IP/hostname for a compute > node, I've found this article: > *http://sourceforge.net/apps/mediawiki/xcat/index.php?title=Changing_the_Service_and_compute_nodes_Hostname_and/or_IP*<http://sourceforge.net/apps/mediawiki/xcat/index.php?title=Changing_the_Service_and_compute_nodes_Hostname_and/or_IP> > > The article per se is great for addressing the issue but the solution > seems require a reprovision(reinstall) of the node. So I wonder if there's > a way to do the same without a reprovisioning? > > Regards, > * Simon (Yang) Yan * > Technical Support Specialist > Platform Computing, IBM Systems and Technology Group > > IBM Technical Computing community is now on IBM developerWorks SMC > *https://www.ibm.com/developerworks/servicemanagement/tc/*<https://www.ibm.com/developerworks/servicemanagement/tc/> > > You can find Best Practices, Integration Scenarios, Deployment Docs in the > Wiki and do Technical Q & A in the Forum in the community on SMC. > ------------------------------------------------------------------------------ > Learn Graph Databases - Download FREE O'Reilly Book > "Graph Databases" is the definitive new guide to graph databases and their > applications. Written by three acclaimed leaders in the field, > this first edition is now available. Download your free book today! > http://p.sf.net/sfu/13534_NeoTech > _______________________________________________ > xCAT-user mailing list > xCAT-user@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/xcat-user > > > > ------------------------------------------------------------------------------ > Learn Graph Databases - Download FREE O'Reilly Book > "Graph Databases" is the definitive new guide to graph databases and their > applications. Written by three acclaimed leaders in the field, > this first edition is now available. Download your free book today! > http://p.sf.net/sfu/13534_NeoTech > _______________________________________________ > xCAT-user mailing list > xCAT-user@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/xcat-user > >
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