Before Linux 5 support becomes expired, we have to upgrade it. But, RHEL5 does not have an option to "upgrade" it on the same server. We had to build a fresh new Linux 6 server and then migrate Oracle EBS R12.1.3 to the new RHEL6 server.
1. Server requirements by Oracle
Linux Admin followed Oracle E-Business Suite Installation and Upgrade Notes Release 12 (12.1.1) for Linux x86-64 (Doc ID 761566.1) to install all required components.
- list of RPMs
To make openmotif21 installation work, follow Doc ID 2057494.1 (Oracle Linux: Dependency Resolution Error "Package oracle-ebs-server-R12-preinstall requires openmotif21 and that has been obsoleted by lesstif") to delete "lesstif" package from Linux server first. Some of the installed RPMs:
$ rpm -q openmotif
package openmotif is not installed
$ rpm -q openmotif21
openmotif21-2.1.30-11.EL6.i686
$ rpm -q xorg-x11-libs-compat
xorg-x11-libs-compat-6.8.2-1.EL.33.0.1.i386
$ rpm -q libXrender
libXrender-0.9.8-2.1.el6_8.1.x86_64
libXrender-0.9.8-2.1.el6_8.1.i686
... ... ... ...
Also, download and install Oracle patch 6078836 (p6078836_101330_LINUX.ZIP) to Linux.
$ ls -al /usr/lib/libdb.so.2
-rw-r--r-- 1 root root 5825 Sep 6 21:12 /usr/lib/libdb.so.2
Without it, starting Apache will fail with error:
$IAS_ORACLE_HOME/Apache/Apache/bin/httpd: error while loading shared libraries: libdb.so.2: cannot open shared object file: No such file or directory
- maintenance tools:
ar, gcc, g++, ksh, ld, linux32, make, XDisplay Server
- kernel settings (in /ect/sysctl.conf)
- Number of Open File Descriptors (/etc/security/limits.conf)
* hard nofile 65535
* soft nofile 4096
2. Steps during the migration
2.1 Stop EBS apps clearly on old hosts and run a file counts
$ find EBS_DIR -type f | wc -l
2.2 Wait Linux Admin to rename the new server name to the "old" server name, and do a sync on file systems including user accounts, cron jobs, etc.
2.3 On the new host, make sure it connects to the right database
$ sqlpuse apps/appsPWD
SQL> select instance_name from v$instance
2.4 Run autoconfig on each nodes
$ cd $ADMIN_SCRIPTS_HOME
$ ./adautocfg.sh
2.5. To avoid "adoafmctl.sh (&adoacorectl.sh): exiting with status 150"
$ mv $ORA_CONFIG_HOME/10.1.3/j2ee/oacore/persistence $ORA_CONFIG_HOME/10.1.3/j2ee/oacore/persistence_DELETE
$ mkdir $ORA_CONFIG_HOME/10.1.3/j2ee/oacore/persistence
$ mv $ORA_CONFIG_HOME/10.1.3/j2ee/oafm/persistence $ORA_CONFIG_HOME/10.1.3/j2ee/oafm/persistence_DELETE
$ mkdir $ORA_CONFIG_HOME/10.1.3/j2ee/oafm/persistence
$ mv $ORA_CONFIG_HOME/10.1.3/j2ee/forms/persistence $ORA_CONFIG_HOME/10.1.3/j2ee/forms/persistence_DELETE
$ mkdir $ORA_CONFIG_HOME/10.1.3/j2ee/forms/persistence
If still getting "status 150", stop all services cleanly and start them again.
2.6 Open a F5 ticket to change old IP address to new one in F5.
2.7 Start apps services
With above steps in many instances I did not get any problem in starting EBS services.
2.8. Copy file libgcc_s-2.3.2-stub.so from patch 12415211 ( see Doc ID 761566.1)
3. Troubleshooting
3.1 scp and sftp failed with error:
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@ WARNING: POSSIBLE DNS SPOOFING DETECTED! @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
The RSA host key for host_name.domain.com has changed,
and the key for the according IP address 177.321.89.56
is unchanged. This could either mean that
DNS SPOOFING is happening or the IP address for the host
and its host key have changed at the same time.
Offending key for IP in /users/userID/.ssh/known_hosts:28
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
Someone could be eavesdropping on you right now (man-in-the-middle attack)!
It is also possible that the RSA host key has just been changed.
The fingerprint for the RSA key sent by the remote host is
e4:5d:1c:12:e5:ab:f5:03:b4:cd:d8:cd:eb:f3:a7:23.
Please contact your system administrator.
Add correct host key in /users/userID/.ssh/known_hosts to get rid of this message.
Offending key in /users/userID/.ssh/known_hosts:7
RSA host key for host_name.domain.com has changed and you have requested strict checking.
Host key verification failed.
lost connection
Fix: $ ssh-keygen -R host_name.domain.com
3.2 Environment variable $PATH does not have the path to its home (such as /users/userID) included
Symptom: Scheduled jobs does not run because scheduler account logs in but does not "see" the script at all.
Fix: add "export PATH=$PATH:$HOME" to file .bashrc
3.3 Shell script can see env variable $HOME.
Symptom: command, such as "cd $HOME", failed.
Fix: hard code the path in the script. (not a good solution).
3.4 When a directory was removed and the old path still exists in the PATH variable, executing a file may get below misleading error. I had to remove the obsolete path from the PATH string.
$ . run_environment
-ksh: . /users/userID/run_environment: not found [No such file or directory]
3.5 RedHat RHEL6 changes mailx on using -a to email attachment. The right syntax:
$ echo "test_body" | mailx -s test-email -a test_attachment.txt emailid@youemail.com
NOTES on Linux commands:
1) Linux version
$ uname -a
Linux host_name.domain.com 2.6.32-642.3.1.el6.x86_64 #1 SMP Sun Jun 26 18:16:44 EDT 2016 x86_64 x86_64 x86_64 GNU/Linux
$ cat /etc/redhat-release
Red Hat Enterprise Linux Server release 6.8 (Santiago)
2) Linux command to find CUP info
$ cat /proc/cpuinfo
$ cat /proc/cpuinfo | grep processor
processor : 0
processor : 1
3) Linux command to find total memory
$ cat /proc/meminfo
MemTotal: 20586472 kB
MemFree: 1406228 kB
Buffers: 873268 kB
Cached: 8353596 kB
SwapCached: 11332 kB
Active: 15413552 kB
Inactive: 2228904 kB
Active(anon): 7687868 kB
Inactive(anon): 729196 kB
Active(file): 7725684 kB
Inactive(file): 1499708 kB
Unevictable: 0 kB
Mlocked: 0 kB
SwapTotal: 8388604 kB
SwapFree: 8288296 kB
... ...
$ free
total used free shared buffers cached
Mem: 20586472 19607488 978984 1504 876480 8510684
-/+ buffers/cache: 10220324 10366148
Swap: 8388604 100308 8288296
(note this instance has more then 350 EBS apps sessions in normal business hours)
