Oracle CRS 10g running on Sun Solaris 10

Instead of rewriting cofiguration instructions, i'd like to shed some light on potential problems you may hit during CRS installation process on SUN Solaris 10 64-bit operating system.

Let's start from the begining..

Folowing documentation provided by Oracle Corporation, you set up all preinstallation parameters required to set up Clusterware software ( kernel parameters, environment variables and many other mentioned on manual pages) and you think you're done with operating system preparation? Unfortunately it is barely truth..

Oracle installer will search for SSC/SCP software in hardcoded locations, which are simply not avaliable in standard Sun Solaris 10 installation.
You have to create symlinks:
/usr/local/bin/ssh -> /usr/bin/ssh
/usr/local/bin/scp -> /usr/bin/scp

Than, if your system is 64-bit capable, you have to "tell" Oracle Universal Installer to prepare 64-bit libraries by setting up:

crle -64 -u -l $CRS_HOME/lib

Otherwise you may hit the problem with libclntsh.so. Of course it's corrigible, and it's not much complicated:

export ORACLE_HOME="/oracle/crs/"
cd $ORACLE_HOME/bin
Edit ./genclntsh file and replace:
LD="ld -m -Dfiles -i -G -z text -L${ORACLE_HOME}/${LIB}"
with:
LD="ld -m -Bsymbolic -i -G -z text -L${ORACLE_HOME}/${LIB}"

Run "relink all" again.
./genclntsh

/bin/clscfg -install -nn $CRS_NODE_NAME_LIST -pn $CRS_PRIVATE_NAME_LIST \
$HOSTNAMES_ARGS -o $CH -c $CRS_CLUSTER_NAME -l "$CRS_LANGUAGE_ID" \
-q $CRS_VOTING_DISKS $CLSCFG_MISCNT

Eg.
./clscfg -install -nn node1,1,node2,2,node3,3 -pn node1-priv,1,node2-priv,2,node3-priv,3 -hn node1,1,node2,2,node3,3 -o /oracle/crs/ -c mycluster -l "'AMERICAN_AMERICA.WE8ISO8859P1'" -q /dev/rdsk/c4t600508B400105E660001000003960000d0s6 -force

After above operations, you can check your RAC health.

root@node1:/oracle/crs/bin# ./olsnodes
node1
node2
node3

root@node1:/oracle/crs/bin# ./crsctl check crs
CSS appears healthy
CRS appears healthy
EVM appears healthy

Juppie! ;)

The last step is to configure VIP interfaces:
$CRS_HOME/bin/vipca -silent -nodelist $CRS_NODELIST -nodevips $CRS_NODEVIPS

Uninstalling Oracle CRS software?

Something went wrong ( errors during installation process? ) and you have to deinstall Oracle CRS related software? How?
Yes.., of course! You can use Universall installer to stand up the trouble.. but unfortunetly, in most circumstances it's simply unhelpful.
So, is there any possibility to completly clean up crs software from your system?

Sure, and all you have to do is ( example based on Solaris 10 OS, but you can easily port it to all kind of Unix/Linux based database systems ) to:

Stop node related applications:
srvctl stop nodeapps -n node_name

Remove files:
/etc/init.d/init.cssd
/etc/init.d/init.crs
/etc/init.d/init.crsd
/etc/init.d/init.evmd
/etc/rc3.d/K96init.crs
/etc/rc3.d/S96init.crs
/etc/inittab.crs

And directories:
/var/opt/oracle/scls_scr
/var/opt/oracle/oprocd

Replace inittab:
/etc/inittab.orig => /etc/inittab

Kill all of CRS daemons:
You can find them in processlist using
ps -ef | egrep 'crs|evm|css'
command.

Remove directories:
/var/tmp/.oracle
/tmp/.oracle
/oracle/crs

And finally, clear data on devices used for OCR ( Oracle Cluster Registry ) and VD ( Voting Disk ).

# dd if=/dev/zero of=/dev/rdsk/XXXXXXXXX count=10240
# dd if=/dev/zero of=/dev/rdsk/XXXXXXXXX count=10240

As you can see on presented example, there is no need overwrite whole devices.