StorageWorks Command Console Agent in a TruCluster Environment Application Note

Application Note

EK–SMA41–AN. A01 Page 3

There are two major steps to creating an ASE Service. The two steps are:

1) create the “start”/”stop” scripts; and

2) create the service.

You can accomplish both the steps by running the “asemgr” and creating the start/stop scripts

inline. However, it is probably more practical to create the start/stop scripts first and then run the

asemgr to finish creating the service.

NOTE: When the ASE Director is started (for example during boot up) ASE

Services run the STOP scripts for all defined services by default. It

then runs the Start scripts for all defined services. When writing Start/Stop scripts,

one thing that should be apparent is scripts that toggle a program’s run state

will exhibit strange behavior.

To create Start/Stop scripts outside of the “asemgr” utility use your favorite editor. The start script

should do what is necessary to start the program. The example illustrated below is included in the

Solutions CD. It can be found in /usr/opt/SWCC220/scripts after the Agent is installed.

/usr/opt/SWCC220/scripts/steamstart

#!/bin/sh

# Simple start script for steamd.

PATH=.:/etc:/bin:/usr/bin:/usr/ucb:/sbin

export PATH

SD="/usr/opt/SWCC220/bin/steamd"

grep -qsw steam /etc/inittab

if [ $? -ne 0 ]

then

echo "steam:3:respawn:$SD sF" >> /etc/inittab

init q

else

exit 0

In the above example, the script checks for the existence of the key word “steam” in the /etc/inittab file.

If not found the steam start line is added. The init daemon is then sent the “q” option that tells it to

reload the inittab file and make any changes to the daemons operation.

Below is the example of the “Stop” script which is also located in the /usr/opt/SWCC220/scripts

directory. Once again the keyword “steam” is searched for and if found the stream editor “sed” is

invoked to remove it. The init daemon is then sent the “q” option to reload the inittab file. Since the

“steam” line has been removed, initd will kill the steamd program.

/usr/opt/SWCC220/scripts/steamstop

#!/bin/sh

# Simple stop script for steamd.