topic Re: how to start cmcld daemon in Operating System - HP-UX

how to start cmcld daemon

Deeos — Wed, 26 Jan 2011 19:44:09 GMT

Hi experts,

I have manually killed cmcld daemon process. can any body tell me how to start cmcld daemon?

Thanks in advance for your support

Re: how to start cmcld daemon

Mel Burslan — Wed, 26 Jan 2011 20:01:49 GMT

I have not dealt with serviceguard clusters for a long time but last I remember, when cmcld daemon dies or becomes unresponsive due to this or that reason, it is enough for the node to induce a TOC and shut itself down immediately. When you killed this daemon, did the server take a nose dive and go down or nothing happened ? If it did not die, is there another cmcld running on this system currently ?

For whatever reason, your cluster status might be a little iffy as it stands right now and a complete cluster restart may put things back in order.

But again this information is coming from 3+ years ago. There might be other enhancements in the newer releases of MCSG. So take my words with a grain of salt.

Re: how to start cmcld daemon

Suraj K Sankari — Thu, 27 Jan 2011 00:24:04 GMT

Hi,
Try to run "cmruncl"
if the deamon not start then its a good idea to reboot the server.
Suraj

Re: how to start cmcld daemon

Emil Velez — Thu, 27 Jan 2011 01:17:51 GMT

normally the system will panic if you kill the cmcld

Suggest that you reboot.. ServiceGuard is not stable at this point.

Re: how to start cmcld daemon

Shukor — Thu, 27 Jan 2011 02:47:30 GMT

Hi Deeos,

cmcld daemon starts after command "cmruncl". To manually restart the daemon without rebooting server, just cmhaltcl and then cmruncl as shown below.

root[cmcluster] # cmruncl -v
Successfully started $SGLBIN/cmcld on node1.
Successfully started $SGLBIN/cmcld on node2.
cmruncl : Waiting for cluster to form.....
cmruncl : Cluster successfully formed.
cmruncl : Check the syslog files on all nodes in the cluster
cmruncl : to verify that no warnings occurred during startup

Regards,
Shukor

Re: how to start cmcld daemon

Ivan Krastev — Thu, 27 Jan 2011 04:17:09 GMT

Don't stop the cluster with cmhaltcl, just use cmrunnode to start cluster services on that node. See man page for more - http://www.unix.com/man-page/All/1m/cmrunnode/

regards,
ivan

Re: how to start cmcld daemon

Ismail Azad — Thu, 27 Jan 2011 04:51:15 GMT

Hi,

cmruncl does start the cmcld daemon and other essential daemons for MCSG. Never try to manaully start this daemon as the cm* commands properly apply and configure the cluster in a way SG can understand which involves the distribution of the binary file and applying of configuration to name a few. Do not manually kill cmcld , cmlvmd and other critical daemons and do not try to MANUALLY RESTART them.

Regards
Ismail Azad

Re: how to start cmcld daemon

sarfaraj ahmad — Thu, 27 Jan 2011 05:04:07 GMT

Hi,
cmruncl will start the cmcld daemon.

NOTE:
The cmruncl command can only be used when the cluster is not running, that is, when none of the nodes is running the cmcld daemon.

Regards,

Re: how to start cmcld daemon

Stephen Doud — Thu, 27 Jan 2011 14:11:50 GMT

cmcld is the main Serviceguard daemon. After the cluster has formed, killing cmcld will cause a TOC (memory dump followed by a system reboot) because the Serviceguard kernel hang detection system was not terminated by a graceful exit of cmcld.

cmruncl starts cmcld on all nodes in the cluster (if none are running Serviceguard), or on specific nodes listed when "-n ..." is added to the cmruncl command. There should only be one instance of cmcld running.

To make a node join cluster operations already in progress, use cmrunnode rather than cmruncl.