Bringing down the package

[dictum9]

I just want to make sure I understand the process of bringing down the package:

cmhaltpkg
cmhaltnode

reboot

cmrunnode
cmrunpkg

cmviewcl -v

[A. Clay Stephenson · Accepted solution]

To simply bring down a package you run "cmhaltpkg mypkg" to restart the package, you "cmrunpkg -n nodename mypkg". There is no need to halt the node or run another another (assuming the cluster is up and running and all nodes are available).

Now, if you actually want to bring down the package and the node without moving the package to another node then your steps are correct BUT you should always supply the -n nodename argument to the cmrunpkg command because you haven't specified what is the preferred node for this package.

After stopping a package, you generally need to run "cmmodpkg -e -v mypkg" to enable package switching.

[dictum9]

I meant

cmrunpkg -n

[dictum9]

Can you explain what "package switching" means?

You mean prevent it from switching to another node in case of a disaster?


> After stopping a package, you generally need to run "cmmodpkg -e -v mypkg" to enable package switching

[A. Clay Stephenson]

Yes, one of the side effects of the cmhaltpkg command is to disable package switching --- meaning that the package cannot automatically switch to another node in the cluster. When you execute the cmrunpkg command, the package switching is left disabled. Now consider what happens when this current node actually fails, because you did not re-enable package switching, the package does not then automatically move to another node --- which defeats the purpose of MC/SG.

[IT_2007]

Hi,

If the package is configured to failover to other node, you can halt package and failover to it. Sometimes, packages were designed to run on single node.

Here what you can do:

cmhaltpkg -v -n -p
cmrunpkg -v -n -p
cmhaltnode -v

node1:> shutdown -ry 0

Once Node is up then you can failback package from Node2 to 1 by running above commands like this.

cmhaltpkg -v -n -p
cmrunpkg -v -n -p