More on Upstart

I did a couple of blog posts on Upstart - introducing it in my post Starting and stopping WebLogic automatically using Upstart and doing the same for OID.

I pointed a couple of people at those posts and they told me they wanted more. More explanation, more clarity, and more about how to use Upstart to boot the entire environment.

So in this post I'm going to show how to use Upstart to start the Oracle database, then (once the database is started) start OID and OVD, and only then start OAM and the other WebLogic services.

The first thing I did was convert my Oracle database startup from a SysV-style init script to Upstart. Colm Divilly did the heavy lifting for me and blogged his config file for Ubuntu. I took that and tweaked it for OEL.
This goes in /etc/init/oracledb.conf:

description  "Oracle Database"

# Based on blog post at
# https://cdivilly.wordpress.com/2010/10/28/ubuntu-upstart-script-for-oracle-database/

# The location of the Oracle install
env ORACLE_HOME=/home/oracle/database/product/11.2.0/dbhome_1
# The user to execute Oracle as
env ORACLE=oracle

start on runlevel [2345]
stop on runlevel [016]

expect fork

pre-start script
    logger "Starting Oracle DB"
    su - $ORACLE -c "$ORACLE_HOME/bin/dbstart $ORACLE_HOME"
end script

post-stop script
    logger "Stopping Oracle DB"
    su - $ORACLE -c "$ORACLE_HOME/bin/dbshut $ORACLE_HOME"
end script

Then /etc/init/oid.conf for OID, OVD and the WebLogic server where I run ODSM:

start on started oracledb
stop on stopping oracledb

# This is good for debugging purposes but it's a bad idea to leave
# this on long term.
#console output

# this starts OPMN, OID and OVD
pre-start script
    logger "pre-start for OID/OVD"
    /bin/su - oracle -c "/home/oracle/middleware/asinst_1/bin/opmnctl startall"
    logger "pre-start for OID/OVD complete"
end script

# and this stops them
post-stop script
    logger "pre-stop for OID/OVD complete"
    /bin/su - oracle -c "/home/oracle/middleware/asinst_1/bin/opmnctl stopall"
    logger "pre-stop for OID/OVD complete"
end script

# this is the AdminServer only:
exec /bin/su - oracle -- /home/oracle/middleware/user_projects/domains/IDMDomain/bin/startWebLogic.sh

The important thing there is the "start on started oracledb" stanza. What that says in English is much as you would expect - "start this once the 'oracledb' service is started". The "stop on" does the same for when the database is being stopped; which will cause Upstart to stop OID and OVD before it tries to stop the database.

Upstart works out the dependencies automatically so no need to worry about numbers or pinging the database via sqlplus or tnsping.

The Upstart config for the OAM Server looks the much the same:
/etc/init/oamadminserver.conf

start on started oracledb
stop on stopping oracledb

exec /bin/su - oracle -- /home/oracle/middleware/user_projects/domains/IAMDomain/bin/startWebLogic.sh

Enjoy.