Managing HP Serviceguard for Linux, Seventh Edition, July 2007

Understanding Serviceguard Software Components

How Packages Run

Chapter 3 65

Package halting normally means that the package halt script executes

(see the next section). However, if a failover package’s configuration has

the service_fail_fast_enabled flag set to yes for the service that

fails, then the node will halt as soon as the failure is detected. If this flag

is not set, the loss of a service will result in halting the package

gracefully by running the halt script.

If auto_run is set to yes, the package will start up on another eligible

node, if it meets all the requirements for startup. If auto_run is set to no,

then the package simply halts without starting up anywhere else.

NOTE If a package is dependent on a subnet, and the subnet on the primary

node fails, the package will start to shut down. If the subnet recovers

immediately (before the package is restarted on an adoptive node), the

package can be restarted on the primary node and does not switch to

another node in this case.

When a Package is Halted with a Command

The Serviceguard cmhaltpkg command has the effect of executing the

package halt script, which halts the services that are running for a

specific package. This provides a graceful shutdown of the package that

is followed by disabling automatic package startup (AUTO_RUN).

You cannot halt a multi-node or system multi-node package unless all

packages that have a configured dependency on it are down. Use

cmviewcl to check the status of dependents. For example, if pkg1 and

pkg2 depend on PKGa, both pkg1 and pkg2 must be halted before you

can halt PKGa.

NOTE If you use cmhaltpkg command with the -n <nodename> option, the

package is halted only if it is running on that node.

The cmmodpkg command cannot be used to halt a package, but it can

disable switching either on particular nodes or on all nodes. A package

can continue running when its switching has been disabled, but it will

not be able to start on other nodes if it stops running on its current node.