Installing Grid Infrastructure 18.104.22.168 on Oracle Linux 6.1 with kernel UEK
Posted by Martin Bach on September 24, 2011
Installing Grid Infrastructure 22.214.171.124 on Oracle Linux 6.1
Yesterday was the big day, or the day Oracle release 126.96.36.199 for Linux x86 and x86-64. Time to download and experiment! The following assumes you have already configured RAC 11g Release 2 before, it’s not a step by step guide how to do this. I expect those to shoot out of the grass like mushrooms in the next few days, especially since the weekend allows people to do the same I did!
The Operating System
I have prepared a xen domU for 188.8.131.52, using the latest Oracle Linux 6.1 build I could find. In summary, I am using the following settings:
- Oracle Linux 6.1 64-bit
- Oracle Linux Server-uek (2.6.32-100.34.1.el6uek.x86_64)
- Initially installed to use the “database server” package group
- 3 NICs – 2 for the HAIP resource and the private interconnect with IP addresses in the ranges of 192.168.100.0/24 and 192.168.101.0/24. The public NIC is on 192.168.99.0/24
- Node 1 uses 192.168.(99|100|101).129 for eth0, eth1 and eth2. The VIP uses 192.168.99.130
- Node 1 uses 192.168.(99|100|101).131 for eth0, eth1 and eth2. The VIP uses 192.168.99.132
- The SCAN is on 192.168.99.(133|134|135)
- All naming resolution is done via my dom0 bind9 server
- I am using a 8GB virtual disk for the operating system, and a 20G LUN for the oracle Grid and RDBMS homes. The 20G are subdivided into 2 LVMs of 10G each mounted to /u01/app/oracle and /u01/crs/184.108.40.206. Note you now seem to need 7.5 G for GRID_HOME
- All software is owned by Oracle
- Shared storage is provided by the xen blktap driver
- 3 x 1G LUNs for +OCR containing OCR and voting disks
- 1 x 10G for +DATA
- 1 x 10G for +RECO
Configuring Oracle Linux 6.1
Installation of the operating environment is beyond the scope of this article, and it hasn’t really changed much since 5.x. All I did was to install the database server package group. I wrote this article for fans of xen-based para-virtualisation. Although initially for 6.0, it applies equally for 6.1. Here’s the xen native domU description (you can easily convert that to xenstore format using libvirt):
# cat node1.cfg name="rac11_2_0_3_ol61_node1" memory=4096 maxmem=8192 vcpus=4 on_poweroff="destroy" on_reboot="restart" on_crash="destroy" localtime=0 builder="linux" bootargs="" extra=" " disk=[ 'file:/var/lib/xen/images/rac11_2_0_3_ol61_node1/disk0,xvda,w', 'file:/var/lib/xen/images/rac11_2_0_3_ol61_node1/oracle,xvdb,w', 'file:/var/lib/xen/images/rac11_2_0_3_ol61_shared/ocr1,xvdc,w!', 'file:/var/lib/xen/images/rac11_2_0_3_ol61_shared/ocr2,xvdd,w!', 'file:/var/lib/xen/images/rac11_2_0_3_ol61_shared/ocr3,xvde,w!', 'file:/var/lib/xen/images/rac11_2_0_3_ol61_shared/data1,xvdf,w!', 'file:/var/lib/xen/images/rac11_2_0_3_ol61_shared/fra1,xvdg,w!' ] vif=[ 'mac=00:16:1e:2b:1d:ef,bridge=br1', 'mac=00:16:1e:2b:1a:e1,bridge=br2', 'mac=00:16:1e:2a:1d:1f,bridge=br3', ] bootloader = "pygrub"
Use the “xm create node1.cfg” command to start the domU. After the OS was ready I installed the following additional software to satisfy the installation requirements:
This is easiest done via yum and the public YUM server Oracle provides. It also has instructions on how to set your repository up.
# yum install compat-libcap1 compat-libstdc++-33 libstdc++-devel gcc-c++ ksh libaio-devel
On the first node only I wanted a VNC-like interface for a graphical installation. The older package vnc-server I loved from 5.x isn’t available anymore, the package you need is now called tigervnc-server. It also requires a new viewer to be downloaded from sourceforge. On the first node you might want to install these, unless you are brave enough to use a silent installation:
Ensure that SELinux and the IPTables packages are turned off. SELinux is still configured in /etc/sysconfig/selinux, where the setting has to be permissive at least. You can use “chkconfig iptables off” to disable the firewall service at boot. Check that there are no filter rules using “iptables -L”.
I created the oracle account using these usual steps-this hasn’t change since 220.127.116.11.
A few changes to /etc/sysctl.were needed; you can copy and paste the below example and append it to your existing settings. Ensure to up the limits where you have more resources!
kernel.shmall = 4294967296 kernel.shmmni = 4096 kernel.sem = 250 32000 100 128 fs.file-max = 6815744 net.core.rmem_default = 262144 net.core.wmem_default = 262144 net.core.rmem_max = 4194304 net.core.wmem_max = 1048576 fs.aio-max-nr = 1048576 net.ipv4.ip_local_port_range = 9000 65500 net.ipv4.conf.eth1.rp_filter = 0 net.ipv4.conf.eth2.rp_filter = 0
Also ensure that you change the rp_filter for your private interconnect to 0 (or 2)-my devices are eth1 and eth2. This is a new requirement for reverse path filtering introduced with 18.104.22.168.
ASM “disks” must be owned by the GRID owner. The easiest way to change the permissions of the ASM disks is to create a new set of udev rules, such as the following:
# cat 61-asm.rules KERNEL=="xvd[cdefg]1", OWNER="oracle", GROUP="asmdba" MODE="0660"
After a quick “start_udev” as root these were applied.
In the first incarnation of this post I forgot to add the shell and process limits! Proceed by adding these:
oracle soft nproc 2047 oracle hard nproc 16384 oracle soft nofile 1024 oracle hard nofile 65536 oracle soft memlock 5000000000 oracle hard memlock 5000000000
For these to take effect, add the below line to /etc/pam.d/login
session required pam_limits.so
Note that as per my domU config file I actually know the device names are persistent, so it was easy to come up with this solution. In real life you would use the dm-multipath package which allows setting the owner,group and permission now in /etc/multipath.conf for every ASM LUN.
There was an interesting problem initially in that kfod seemed to trigger a change of permissions back to root:disk whenever it ran. Changing the ownership back to oracle only lasted until the next execution of kfod. The only fix I could come up with involved the udev rules.
Good news for those who suffered from the multicast problem introduced in 22.214.171.124-cluvfy now knows about it and checks during the post hwos stage (I had already installed cvuqdisk):
[oracle@rac11203node1 grid]$ ./runcluvfy.sh stage -post hwos -n rac11203node1 Performing post-checks for hardware and operating system setup Checking node reachability... Node reachability check passed from node "rac11203node1" Checking user equivalence... User equivalence check passed for user "oracle" Checking node connectivity... Checking hosts config file... Verification of the hosts config file successful Node connectivity passed for subnet "192.168.99.0" with node(s) rac11203node1 TCP connectivity check passed for subnet "192.168.99.0" Node connectivity passed for subnet "192.168.100.0" with node(s) rac11203node1 TCP connectivity check passed for subnet "192.168.100.0" Node connectivity passed for subnet "192.168.101.0" with node(s) rac11203node1 TCP connectivity check passed for subnet "192.168.101.0" Interfaces found on subnet "192.168.99.0" that are likely candidates for VIP are: rac11203node1 eth0:192.168.99.129 Interfaces found on subnet "192.168.100.0" that are likely candidates for a private interconnect are: rac11203node1 eth1:192.168.100.129 Interfaces found on subnet "192.168.101.0" that are likely candidates for a private interconnect are: rac11203node1 eth2:192.168.101.129 Node connectivity check passed Checking multicast communication... Checking subnet "192.168.99.0" for multicast communication with multicast group "126.96.36.199"... Check of subnet "192.168.99.0" for multicast communication with multicast group "188.8.131.52" passed. Checking subnet "192.168.100.0" for multicast communication with multicast group "184.108.40.206"... Check of subnet "192.168.100.0" for multicast communication with multicast group "220.127.116.11" passed. Checking subnet "192.168.101.0" for multicast communication with multicast group "18.104.22.168"... Check of subnet "192.168.101.0" for multicast communication with multicast group "22.214.171.124" passed. Check of multicast communication passed. Check for multiple users with UID value 0 passed Time zone consistency check passed Checking shared storage accessibility... Disk Sharing Nodes (1 in count) ------------------------------------ ------------------------ /dev/xvda rac11203node1 /dev/xvdb rac11203node1 /dev/xvdc rac11203node1 /dev/xvdd rac11203node1 /dev/xvde rac11203node1 /dev/xvdf rac11203node1 /dev/xvdg rac11203node1 Shared storage check was successful on nodes "rac11203node1" Post-check for hardware and operating system setup was successful.
As always, I tried to fix as many problems before invoking runInstaller as possible. The “-fixup” option to runcluvfy is again very useful. I strongly recommend running the fixup script prior to executing the OUI binary.
The old trick to remove /etc/ntp.conf causes the NTP check to complete ok, in which case you are getting the ctsd service for time synchronisation. You should not do this in production-consistent times in the cluster are paramount!
I encountered an issue with the check for free space later in the installation during my first attemps. OUI wants 7.5G for GRID_HOME, even though the installation “only” took around 3 in the end. I exported TMP and TEMP to point to my 10G mount point to avoid this warning:
$ export TEMP=/u01/crs/temp $ export TMP=/u01/crs/temp $ ./runInstaller
The installation procedure for Grid Infrastructure 126.96.36.199 is almost exactly the same as for 188.8.131.52, except for the option to change the AU size for the initial disk group you create:
Once you have completed the wizard, it’s time to hit the “install” button. The magic again happens in the root.sh file, or rootupgrade.sh if you are upgrading. I included the root.sh output so you have something to compare against:
Performing root user operation for Oracle 11g The following environment variables are set as: ORACLE_OWNER= oracle ORACLE_HOME= /u01/crs/184.108.40.206 Enter the full pathname of the local bin directory: [/usr/local/bin]: Creating y directory... Copying dbhome to y ... Copying oraenv to y ... Copying coraenv to y ... Creating /etc/oratab file... Entries will be added to the /etc/oratab file as needed by Database Configuration Assistant when a database is created Finished running generic part of root script. Now product-specific root actions will be performed. Using configuration parameter file: /u01/crs/220.127.116.11/crs/install/crsconfig_params Creating trace directory User ignored Prerequisites during installation OLR initialization - successful root wallet root wallet cert root cert export peer wallet profile reader wallet pa wallet peer wallet keys pa wallet keys peer cert request pa cert request peer cert pa cert peer root cert TP profile reader root cert TP pa root cert TP peer pa cert TP pa peer cert TP profile reader pa cert TP profile reader peer cert TP peer user cert pa user cert Adding Clusterware entries to upstart CRS-2672: Attempting to start 'ora.mdnsd' on 'rac11203node1' CRS-2676: Start of 'ora.mdnsd' on 'rac11203node1' succeeded CRS-2672: Attempting to start 'ora.gpnpd' on 'rac11203node1' CRS-2676: Start of 'ora.gpnpd' on 'rac11203node1' succeeded CRS-2672: Attempting to start 'ora.cssdmonitor' on 'rac11203node1' CRS-2672: Attempting to start 'ora.gipcd' on 'rac11203node1' CRS-2676: Start of 'ora.gipcd' on 'rac11203node1' succeeded CRS-2676: Start of 'ora.cssdmonitor' on 'rac11203node1' succeeded CRS-2672: Attempting to start 'ora.cssd' on 'rac11203node1' CRS-2672: Attempting to start 'ora.diskmon' on 'rac11203node1' CRS-2676: Start of 'ora.diskmon' on 'rac11203node1' succeeded CRS-2676: Start of 'ora.cssd' on 'rac11203node1' succeeded ASM created and started successfully. Disk Group OCR created successfully. clscfg: -install mode specified Successfully accumulated necessary OCR keys. Creating OCR keys for user 'root', privgrp 'root'.. Operation successful. CRS-4256: Updating the profile Successful addition of voting disk 1621f2201ab94f32bf613b17f62982b0. Successful addition of voting disk 337a3f0b8a2d4f7ebff85594e4a8d3cd. Successful addition of voting disk 3ae328cce2b94f3bbfe37b0948362993. Successfully replaced voting disk group with +OCR. CRS-4256: Updating the profile CRS-4266: Voting file(s) successfully replaced ## STATE File Universal Id File Name Disk group -- ----- ----------------- --------- --------- 1. ONLINE 1621f2201ab94f32bf613b17f62982b0 (/dev/xvdc1) [OCR] 2. ONLINE 337a3f0b8a2d4f7ebff85594e4a8d3cd (/dev/xvdd1) [OCR] 3. ONLINE 3ae328cce2b94f3bbfe37b0948362993 (/dev/xvde1) [OCR] Located 3 voting disk(s). CRS-2672: Attempting to start 'ora.asm' on 'rac11203node1' CRS-2676: Start of 'ora.asm' on 'rac11203node1' succeeded CRS-2672: Attempting to start 'ora.OCR.dg' on 'rac11203node1' CRS-2676: Start of 'ora.OCR.dg' on 'rac11203node1' succeeded CRS-2672: Attempting to start 'ora.registry.acfs' on 'rac11203node1' CRS-2676: Start of 'ora.registry.acfs' on 'rac11203node1' succeeded Configure Oracle Grid Infrastructure for a Cluster ... succeeded
That’s it! After returning to the OUI screen you run the remaing assistants and finally are rewarded with the success message:
Better still, I could now log in to SQL*Plus and was rewarded with the new version:
$ sqlplus / as sysasm SQL*Plus: Release 18.104.22.168.0 Production on Sat Sep 24 22:29:45 2011 Copyright (c) 1982, 2011, Oracle. All rights reserved. Connected to: Oracle Database 11g Enterprise Edition Release 22.214.171.124.0 - 64bit Production With the Real Application Clusters and Automatic Storage Management options SQL> select * from v$version; BANNER -------------------------------------------------------------------------------- Oracle Database 11g Enterprise Edition Release 126.96.36.199.0 - 64bit Production PL/SQL Release 188.8.131.52.0 - Production CORE 184.108.40.206.0 Production TNS for Linux: Version 220.127.116.11.0 - Production NLSRTL Version 18.104.22.168.0 - Production SQL>
You might remark that in the output there has only ever been one node referenced. That is correct-my lab box has limited resources and I’d like to test the addNode.sh script for each new release so please be patient! I’m planning an article about upgrading to 22.214.171.124 soon, as well as the addition of a node. One thing I noticed was the abnormally high CPU usage for the CSSD processes: ocssd.bin, cssdagent and cssdmonitor-something I find alarming at the moment.
top - 22:53:19 up 1:57, 5 users, load average: 5.41, 4.03, 3.77 Tasks: 192 total, 1 running, 191 sleeping, 0 stopped, 0 zombie Cpu(s): 0.3%us, 0.2%sy, 0.0%ni, 99.5%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st Mem: 4102536k total, 3500784k used, 601752k free, 59792k buffers Swap: 1048568k total, 4336k used, 1044232k free, 2273908k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 27646 oracle RT 0 1607m 119m 53m S 152.0 3.0 48:57.35 /u01/crs/126.96.36.199/bin/ocssd.bin 27634 root RT 0 954m 93m 55m S 146.0 2.3 31:45.50 /u01/crs/188.8.131.52/bin/cssdagent 27613 root RT 0 888m 91m 55m S 96.6 2.3 5124095h /u01/crs/184.108.40.206/bin/cssdmonitor 28110 oracle -2 0 485m 14m 12m S 1.3 0.4 0:34.65 asm_vktm_+ASM1 28126 oracle -2 0 499m 28m 15m S 0.3 0.7 0:04.52 asm_lms0_+ASM1 28411 root RT 0 500m 144m 59m S 0.3 3.6 5124095h /u01/crs/220.127.116.11/bin/ologgerd -M -d /u01/crs/18.104.22.168/crf/db/rac11203node1 32394 oracle 20 0 15020 1300 932 R 0.3 0.0 5124095h top 1 root 20 0 19336 1476 1212 S 0.0 0.0 0:00.41 /sbin/init ...
22.214.171.124 certainly didn’t use that much CPU across 4 cores…
Update: I have just repeated the same installation on VirtualBox 4.1.2 with less potent hardware, and funny enough the CPU problem has disappeared. How is that possible? I need to understand more, and maybe update the XEN host to something more recent.