Re: Reg: Moving CloudStack Management Server from one machine to another

[Steven Liang]

Hi Geoff, Can I use LVS to implement load balancer. If so, what ports should I use? Regards, Steven On 05/27/2013 03:24 AM, Geoff Higginbottom wrote: Nehal, I would approach this in a slightly different way. Set up your new management server but as a 2nd node rather than a replacement. To do so you need to put a load balancer in front of both of them and update the global setting 'host' with the new load balanced IP. After updating the 'host' setting and restarting the 'cloud-management' service on each, you will need to restart all system VMs so they use this new setting. You should then add a 2nd MySQL server, initially as a slave and allow it to replicate, then 'fail over' making the slave the new master. The docs detail how to deploy multiple MySQL servers and how to fail over. Whilst this may seem like more work, we always deploy with at least two Management Servers and two MySQL servers as this provides better resilience makes performing planned maintenance much easier. Regards Geoff Higginbottom CTO / Cloud Architect D: +44(0)20 3603 0542<tel:+442036030542> | S: +44(0)20 3603 0540<tel:+442036030540> | M: +44(0)7968161581<tel:+447968161581> geoff.higginbot...@shapeblue.com<mailto:geoff.higginbot...@shapeblue.com> | www.shapeblue.com ShapeBlue Ltd, 53 Chandos Place, Covent Garden, London, WC2N 4HS On 27 May 2013, at 06:25, "Nehal J. Wani" <nehaljw.k...@gmail.com<mailto:nehaljw.k...@gmail.com>> wrote: Suppose I have only one management server and I want to take it down for maintenance. What is the procedure to deploy the management server on a different machine? I tried the following on the new machine: (i) Completed all the steps from Chapter 2 in the Apache_CloudStack-4.0.2-Quick_Install_Guide-en-US.pdf (ii) Copied all files from /etc/cloud, /usr/lib64/cloud, /var/lib/cloud from the old machine to the new one. (iii) Took dumps of the databases cloud, cloudbridge, cloud_usage from old machine and then put them in the new machine. (iv) Changed the ip in /etc/cloud/agent/agent.properties and /etc/cloud/management/db.properties from 10.3.3.57 to 10.3.3.56 But i still get the error 2013-05-27 10:51:16,581 WARN [agent.manager.ClusteredAgentManagerImpl] (Job-Executor-2:job-93) Unable to connect to peer management server: 90520731198133, ip: 10.3.3.57 due to Connection refused java.net.ConnectException: Connection refused at sun.nio.ch.Net.connect(Native Method) at sun.nio.ch.SocketChannelImpl.connect(SocketChannelImpl.java:525) at java.nio.channels.SocketChannel.open(SocketChannel.java:164) at com.cloud.agent.manager.ClusteredAgentManagerImpl.connectToPeer(ClusteredAgentManagerImpl.java:442) at com.cloud.agent.manager.ClusteredAgentAttache.send(ClusteredAgentAttache.java:172) at com.cloud.agent.manager.AgentAttache.send(AgentAttache.java:388) at com.cloud.agent.manager.AgentManagerImpl.send(AgentManagerImpl.java:505) at com.cloud.agent.manager.AgentManagerImpl.send(AgentManagerImpl.java:458) at com.cloud.vm.VirtualMachineManagerImpl.advanceStop(VirtualMachineManagerImpl.java:1079) at com.cloud.vm.UserVmManagerImpl.stopVirtualMachine(UserVmManagerImpl.java:2804) at com.cloud.event.ActionEventCallback.intercept(ActionEventCallback.java:36) at com.cloud.api.commands.StopVMCmd.execute(StopVMCmd.java:119) at com.cloud.api.ApiDispatcher.dispatch(ApiDispatcher.java:138) at com.cloud.async.AsyncJobManagerImpl$1.run(AsyncJobManagerImpl.java:432) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334) at java.util.concurrent.FutureTask.run(FutureTask.java:166) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) at java.lang.Thread.run(Thread.java:679) How to rectify this? How can I achieve my goal? Thanking You, Nehal J. Wani UG2, BTech CS+MS(CL) IIIT-Hyderabad http://commanlinewani.blogspot.com This email and any attachments to it may be confidential and are intended solely for the use of the individual to whom it is addressed. Any views or opinions expressed are solely those of the author and do not necessarily represent those of Shape Blue Ltd or related companies. If you are not the intended recipient of this email, you must neither take any action based upon its contents, nor copy or show it to anyone. Please contact the sender if you believe you have received this email in error. Shape Blue Ltd is a company incorporated in England & Wales. ShapeBlue Services India LLP is operated under license from Shape Blue Ltd. ShapeBlue is a registered trademark. -- Steven Liang Linux System Admin Phone: 1.416.499.8009 ext. 2865 Cell Phone: 1.647.718.5292 Email: stevenli...@yesup.com www.yesup.com | account.yesup.com