Recently i was committed to update a lab machine from RHEL 5.6 to RHEL 5.8
in order to make it compliant with a new version of flare that the storage team
has scheduled to deploy on the Clariion.
To do this i used the yum method.
We are using an internal yum server that supply updates for all RHEL releases from 4.6 to 6.2.
So I did a yum update with the original repo file that still pointed to u6 dir on the yum server,
to bring the installed packages to the latest available level.
Later i did a yum clean all to clean the local cached yum files , replaced u6 with u8 in the repo file
and started to evaluate the real upgrade process.
I simulated this by executing “yum update” and answering N at the confirmation question.
After a review of the proposed packages , i am ready to go.
So let’s start the operation measuring also the elapsed time .
Please note that the following yum output is not complete because of its size !
[root@LABSERVER01 backup_config]# time yum -y update
Loaded plugins: rhnplugin, security
This system is not registered with RHN.
RHN support will be disabled.
Skipping security plugin, no data
Setting up Update Process
Skipping security plugin, no data
–> Running transaction check
…
Transaction Summary
Total download size: 428 M
Complete!
real 10m30.912s
[root@LABSERVER01 backup_config]#
After the completion of the yum update we need to install the kernel-debug package too , because it’s a dependency for oracleasm.
cd /root/ASM/2.6.18-308.8.2/
yum install kernel-debug
rpm -Uvh oracleasm-2.6.18-308.8.2.el5-2.0.5-1.el5.x86_64.rpm oracleasm-2.6.18-308.8.2.el5debug-2.0.5-1.el5.x86_64.rpm oracleasmlib-2.0.4-1.el5.x86_64.rpm oracleasm-support-2.1.7-1.el5.x86_64.rpm
reboot && exit
After the reboot we can verify that the version is really changed , as we can see the redhat-release now it is 5.8 .
[root@LABSERVER01 ~]# uptime
11:36:47 up 4 min, 1 user, load average: 0.03, 0.07, 0.03
[root@LABSERVER01 ~]# uname -a
Linux LABSERVER01 2.6.18-308.8.2.el5 #1 SMP Tue May 29 11:54:17 EDT 2012 x86_64 x86_64 x86_64 GNU/Linux
[root@LABSERVER01 ~]# cat /etc/redhat-release
Red Hat Enterprise Linux Server release 5.8 (Tikanga)
[root@LABSERVER01 ~]#
At this point we needed to manually start the EMC PowerPath service , it was really strange…
some investigaion needed !
/etc/init.d/PowerPath start
after powerpath modules load , we can interact through powermt facility
powermt save file=powermt.save.$(date +%Y%m%d).postupgrade
powermt display dev=all > powermt.display.$(date +%Y%m%d).postupgrade
The modules are not loaded because PowerPath did not start at boot.
In our case the problem was generated by the following paragraph indentation
in / etc / rc.sysinit (!) .
I noticed that the following block of lines was “tabbed” on the right , but i didn’t care about .
###BEGINPP
# Configure and initialize PowerPath.
if [ -f /etc/init.d/PowerPath ]; then
/etc/init.d/PowerPath start
fi
###ENDPP
So i remoevd the unneeded characters (spaces or tabs) and (magic…) now PowerPath is started normally.
After the reboot i verified that powerpath is loaded and the devices are visible and working correctly.
lsmod | grep -i emc
emcpvlumd 69472 0
emcpxcrypt 166376 0
emcpdm 75528 0
emcpgpx 55376 3 emcpvlumd,emcpxcrypt,emcpdm
emcpmpx 201160 8
emcp 2170976 5 emcpvlumd,emcpxcrypt,emcpdm,emcpgpx,emcpmpx
[root@LABSERVER01 ~]# powermt display dev=all
Pseudo name=emcpowerb
CLARiiON ID=CKM00084800353 [SG_LABSERVER]
Logical device ID=600601605FF0220044BF43B27710E111 [LUN 140]
state=alive; policy=CLAROpt; priority=0; queued-IOs=0;
Owner: default=SP B, current=SP B Array failover mode: 1
==============================================================================
————— Host ————— – Stor – — I/O Path — — Stats —
### HW Path I/O Paths Interf. Mode State Q-IOs Errors
==============================================================================
1 qla2xxx sdb SP A2 active alive 0 0
1 qla2xxx sdd SP B2 active alive 0 0
2 qla2xxx sdf SP B7 active alive 0 0
2 qla2xxx sdh SP A7 active alive 0 0
Pseudo name=emcpowera
CLARiiON ID=CKM00084800353 [SG_LABSERVER]
Logical device ID=600601605FF0220068B2FDD2810FE111 [LUN 135]
state=alive; policy=CLAROpt; priority=0; queued-IOs=0;
Owner: default=SP B, current=SP B Array failover mode: 1
==============================================================================
————— Host ————— – Stor – — I/O Path — — Stats —
### HW Path I/O Paths Interf. Mode State Q-IOs Errors
==============================================================================
1 qla2xxx sda SP A2 active alive 0 0
1 qla2xxx sdc SP B2 active alive 0 0
2 qla2xxx sde SP B7 active alive 0 0
2 qla2xxx sdg SP A7 active alive 0 0
