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setting up 3-node Oracle 10g R2 RAC using iSCSI SAN (Openfiler)

Hardware Used in setting up 3-node 10g R2 RAC using iSCSI SAN (Openfiler):

·         Total Machines: 4 (3 for RAC nodes + 1 for NAS)
·         Network Switches: 3 (for Public, Private and Shared Storage)
·         Extra Network Adaptors: 7 (6 for RAC nodes (2 for each node) and one for Storage Server)
·         Network cables: 10 (9 for RAC nodes (3 for each node) and one for Shared Storage)
·         External USB HD: 1 (1 TB)

Machines Specifications:
DELL OPTIPLEX GX620
CPU: Intel 3800MHz 
RAM: 4084MB 
HD: 250GB
DVD, 10/100 NIC, 8 MB VRAM

                Network Adaptor Specifications:                             
                                Linksys EG1032 Instant Gigabit Network Adapter             
                Network Switch Specifications:
                                D-Link 24-Port Rackmountable Gigabit Switch
                Network Cables Specifications:
                                25-Foot Cat6 Snagless Patch Cable – (Blue, Black and Grey)

Software Used for the 3-node RAC Setup using NAS (Openfiler):

·         NAS Storage Solution: Openfiler 2.3 (2.6.26.8-1.0.11.smp.pae.gcc3.4.x86.i686)
·         Operating System: Oracle Enterprise Linux 5.5 (2.6.18-194.el5PAE)
·         Clusterware: Oracle 10g R2 (10.2.0.1)
·         Oracle RAC: Oracle RDBMS 10g R2 (10.2.0.1)
·           10.2.0.3 PatchSet to be applied on 10.2.0.1

3-Node RAC Setup

Operating System: Oracle Enterprise Linux 5.5 (2.6.18-194.el5PAE):
Server: All the RAC Nodes

Oracle Clusterware (10.2.0.3):
Server: All the RAC Nodes
ORACLE_BASE: /u01/app/oracle
ORACLE_HOME: /u01/app/oracle/crs
Owner: oracle (Primary Group: oinstall, Secondary Group:  dba)
Permissions: 775
OCR/Voting Disk Storage Type: Raw Devices
Oracle Inventory Location: /u01/app/oraInventory
               
Oracle Database Software (RAC 10.2.0.3) for ASM_HOME:

Server: All the RAC Nodes
ORACLE_BASE: /u01/app/oracle
ORACLE_HOME: /u01/app/oracle/asm
Owner: oracle (Primary Group: oinstall, Secondary Group:  dba)
Permissions: 775
Oracle Inventory Location: /u01/app/oraInventory
Listener: LISTENER (TCP:1521)

Oracle Database Software (RAC 10.2.0.3) for DB_HOME:

Server: All the RAC Nodes
ORACLE_BASE: /u01/app/oracle
ORACLE_HOME: /u01/app/oracle/db
Owner: oracle (Primary Group: oinstall, Secondary Group:  dba)
Permissions: 775
Oracle Inventory Location: /u01/app/oraInventory

Database Name: labdb
Listener: LAB_LISTENER (TCP:1530)

Openfiler 2.3:
Server: single dedicated server acting as NAS.
OS: Openfiler 2.3 (2.6.26.8-1.0.11.smp.pae.gcc3.4.x86.i686).



Existing 10gR2 RAC Network Setup:

Machine
Public Name
Private  
Name
VIP Name
Resolved By
RAC Node1
node1.hingu.net
node1-prv
node1-vip.hingu.net  
DNS and /etc/hosts
RAC Node2
node2.hingu.net
node2-prv
node2-vip.hingu.net  
DNS and /etc/hosts
RAC Node3
node3.hingu.net
node3-prv
node3-vip.hingu.net  
DNS and  /etc/hosts
Storage
nas-server
N/A
N/A
N/A     
DNS server
lab-dns.hingu.net
N/A
N/A
N/A

Public Network: 192.168.2.0/eth2
Private network (cluster Interconnect): 192.168.0.0/eth0
Private network (Storage Network): 192.168.1.0/eth1
Machine
Public IP
Private IP
VIP
Storage IP
Resolved By
RAC Node1
192.168.2.1
192.168.0.1
192.168.2.51
192.168.1.1
DNS and /etc/hosts
RAC Node2
192.168.2.2
192.168.0.2
192.168.2.52
192.168.1.2
DNS and /etc/hosts
RAC Node3
192.168.2.3
192.168.0.3
192.168.2.53
192.168.1.3
DNS and /etc/hosts
Storage
N/A
N/A
N/A
192.168.1.101
DNS and /etc/hosts
DNS server
192.168.2.200
N/A
N/A
N/A
N/A


Network Configuration for RAC Nodes/NAS Server/DNS Host:

Public, VIPs and SCAN VIPs are resolved by DNS. The private IPs for Cluster Interconnects are resolved through /etc/hosts. The hostname along with public/private and NAS network is configured at the time of OEL network installations. The final Network Configurations files are listed here.

(a)    hostname:

For Node node1:
[root@node1 ~]# hostname node1.hingu.net

       node1.hingu.net: /etc/sysconfig/network
NETWORKING=yes
NETWORKING_IPV6=yes
HOSTNAME=node1.hingu.net
For Node node2:
[root@node2 ~]# hostname node2.hingu.net

       node2.hingu.net: /etc/sysconfig/network

NETWORKING=yes
NETWORKING_IPV6=yes
HOSTNAME=node2.hingu.net
For Node node3:
[root@node3 ~]# hostname node3.hingu.net

        node3.hingu.net: /etc/sysconfig/network
NETWORKING=yes
NETWORKING_IPV6=yes
HOSTNAME=node3.hingu.net
For Node nas-server:
[root@nas-server ~]# hostname nas-server

        nas-server: /etc/sysconfig/network
NETWORKING=yes
HOSTNAME=nas-server
For Node lab-dns:
[root@lab-dns ~]# hostname lab-dns
\
        lab-dns.hingu.net: /etc/sysconfig/network
NETWORKING=yes
NETWORKING_IPV6=yes
HOSTNAME=nas-server
(b)   Private Network for Cluster Interconnect:

node1.hingu.net: /etc/sysconfig/network-scripts/ifcfg-eth0
# Linksys Gigabit Network Adapter
DEVICE=eth0
BOOTPROTO=static
BROADCAST=192.168.0.255
HWADDR=00:22:6B:BF:4E:60
IPADDR=192.168.0.1
IPV6INIT=yes
IPV6_AUTOCONF=yes
NETMASK=255.255.255.0
NETWORK=192.168.0.0
ONBOOT=yes                                                          
node2.hingu.net: /etc/sysconfig/network-scripts/ifcfg-eth0
# Linksys Gigabit Network Adapter
DEVICE=eth0
BOOTPROTO=static
BROADCAST=192.168.0.255
HWADDR=00:22:6B:BF:4E:4B
IPADDR=192.168.0.2
IPV6INIT=yes
IPV6_AUTOCONF=yes
NETMASK=255.255.255.0
NETWORK=192.168.0.0
ONBOOT=yes
node3.hingu.net: /etc/sysconfig/network-scripts/ifcfg-eth0
# Linksys Gigabit Network Adapter
DEVICE=eth0
BOOTPROTO=static
BROADCAST=192.168.0.255
HWADDR=00:22:6B:BF:4E:49
IPADDR=192.168.0.3
IPV6INIT=yes
IPV6_AUTOCONF=yes
NETMASK=255.255.255.0
NETWORK=192.168.0.0
ONBOOT=yes
(c)    Public Network:

node1.hingu.net: /etc/sysconfig/network-scripts/ifcfg-eth2
# Broadcom Corporation NetXtreme BCM5751 Gigabit Ethernet PCI Express
DEVICE=eth2
BOOTPROTO=static
BROADCAST=192.168.2.255
HWADDR=00:18:8B:04:6A:62
IPADDR=192.168.2.1
IPV6INIT=yes
IPV6_AUTOCONF=yes
NETMASK=255.255.255.0
NETWORK=192.168.2.0
ONBOOT=yes
node2.hingu.net: /etc/sysconfig/network-scripts/ifcfg-eth2
# Broadcom Corporation NetXtreme BCM5751 Gigabit Ethernet PCI Express
DEVICE=eth2
BOOTPROTO=static
BROADCAST=192.168.2.255
HWADDR=00:18:8B:24:F8:58
IPADDR=192.168.2.2
IPV6INIT=yes
IPV6_AUTOCONF=yes
NETMASK=255.255.255.0
NETWORK=192.168.2.0
ONBOOT=yes

node3.hingu.net: /etc/sysconfig/network-scripts/ifcfg-eth2
# Broadcom Corporation NetXtreme BCM5751 Gigabit Ethernet PCI Express
DEVICE=eth2
BOOTPROTO=static
BROADCAST=192.168.2.255
HWADDR=00:19:B9:0C:E6:EF
IPADDR=192.168.2.3
IPV6INIT=yes
IPV6_AUTOCONF=yes
NETMASK=255.255.255.0
NETWORK=192.168.2.0
ONBOOT=yes
lab-dns.hingu.net: /etc/sysconfig/network-scripts/ifcfg-eth0
# Broadcom Corporation NetXtreme BCM5751 Gigabit Ethernet PCI Express
DEVICE=eth0
BOOTPROTO=static
BROADCAST=192.168.2.255
HWADDR=00:13:72:A1:E9:1B
IPADDR=192.168.2.200
NETMASK=255.255.255.0
NETWORK=192.168.2.0
ONBOOT=yes
(d)   Private Network for Shared Storage:

node1.hingu.net: /etc/sysconfig/network-scripts/ifcfg-eth1
# Linksys Gigabit Network Adapter
DEVICE=eth1
BOOTPROTO=static
BROADCAST=192.168.1.255
HWADDR=00:22:6B:BF:4E:60
IPADDR=192.168.1.1
IPV6INIT=yes
IPV6_AUTOCONF=yes
NETMASK=255.255.255.0
NETWORK=192.168.1.0
ONBOOT=yes
node2.hingu.net: /etc/sysconfig/network-scripts/ifcfg-eth1
# Linksys Gigabit Network Adapter
DEVICE=eth1
BOOTPROTO=static
BROADCAST=192.168.1.255
HWADDR=00:22:6B:BF:45:13
IPADDR=192.168.1.2
IPV6INIT=yes
IPV6_AUTOCONF=yes
NETMASK=255.255.255.0
NETWORK=192.168.1.0
ONBOOT=yes
node3.hingu.net: /etc/sysconfig/network-scripts/ifcfg-eth1
# Linksys Gigabit Network Adapter
DEVICE=eth1
BOOTPROTO=static
BROADCAST=192.168.1.255
HWADDR=00:22:6B:BF:4E:48
IPADDR=192.168.1.3
IPV6INIT=yes
IPV6_AUTOCONF=yes
NETMASK=255.255.255.0
NETWORK=192.168.1.0
ONBOOT=yes
nas-server.hingu.net: /etc/sysconfig/network-scripts/ifcfg-eth1
BOOTPROTO=static
BROADCAST=192.168.1.255
HWADDR=00:22:6B:BF:43:D6
IPADDR=192.168.1.101
NETMASK=255.255.255.0
NETWORK=192.168.1.0
ONBOOT=yes
(e)   /etc/hosts files:

node1.hingu.net: /etc/hosts
# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1            localhost.localdomain localhost
::1           localhost6.localdomain6 localhost6
 
##=======================================
# Pulic Network
##=======================================
 
192.168.2.1             node1.hingu.net  node1
192.168.2.2             node2.hingu.net  node2
192.168.2.3             node3.hingu.net  node3
 
 
##=======================================
# VIPs
##=======================================
 
192.168.2.51             node1-vip.hingu.net node1-vip
192.168.2.52             node2-vip.hingu.net node2-vip
192.168.2.53             node3-vip.hingu.net node3-vip
 
##=======================================
# Private Network for Cluster Interconnect
##=======================================
 
192.168.0.1             node1-prv
192.168.0.2             node2-prv
192.168.0.3             node3-prv
 
##=======================================
##=======================================
node2.hingu.net: /etc/hosts
# # Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1            localhost.localdomain localhost
::1           localhost6.localdomain6 localhost6
 
##=======================================
# Pulic Network
##=======================================
 
192.168.2.1             node1.hingu.net  node1
192.168.2.2             node2.hingu.net  node2
192.168.2.3             node3.hingu.net  node3
 
 
##=======================================
# VIPs
##=======================================
 
192.168.2.51             node1-vip.hingu.net node1-vip
192.168.2.52             node2-vip.hingu.net node2-vip
192.168.2.53             node3-vip.hingu.net node3-vip
 
##=======================================
# Private Network for Cluster Interconnect
##=======================================
 
192.168.0.1             node1-prv
192.168.0.2             node2-prv
192.168.0.3             node3-prv
 
##=======================================
##=======================================

node3.hingu.net: /etc/hosts
# # Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1            localhost.localdomain localhost
::1           localhost6.localdomain6 localhost6
 
 
##=======================================
# Pulic Network
##=======================================
 
192.168.2.1             node1.hingu.net  node1
192.168.2.2             node2.hingu.net  node2
192.168.2.3             node3.hingu.net  node3
 
 
##=======================================
# VIPs
##=======================================
 
192.168.2.51             node1-vip.hingu.net node1-vip
192.168.2.52             node2-vip.hingu.net node2-vip
192.168.2.53             node3-vip.hingu.net node3-vip
 
##=======================================
# Private Network for Cluster Interconnect
##=======================================
 
192.168.0.1             node1-prv
192.168.0.2             node2-prv
192.168.0.3             node3-prv
 
##=======================================
##=======================================
lab-dns.hingu.net: /etc/hosts
# # Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1            lab-dns.hingu.net lab-dns localhost.localdomain localhost
Configure DNS server Node VIPs and Node IPs:

DNS Server: lab-dns.hingu.net

RPMs required in setting up DNS server:
ypbind-1.19-12.el5
bind-utils-9.3.6-4.P1.el5_4.2
bind-9.3.6-4.P1.el5_4.2
system-config-bind-4.0.3-4.0.1.el5
bind-libs-9.3.6-4.P1.el5_4.2
bind-chroot-9.3.6-4.P1.el5_4.2

Configurations files modified/created to set up DNS:

lab-dbs.hingu.net

/var/named/chroot/etc/named.conf (modified)
/var/named/chroot/var/named/hingu.net.zone (created)
/var/named/chroot/var/named/2.168.192.in-addr.arpa.zone (created)
/var/named/chroot/var/named/1.168.192.in-addr.arpa.zone (created)

On node1, node2 and node3

/etc/resolv.conf (modified)

/var/named/chroot/etc/named.conf
//
// Default initial "Caching Only" name server configuration
//
 
options {
       directory "/var/named";
       dump-file "/var/named/data/cache_dump.db";
        statistics-file "/var/named/data/named_stats.txt";
};
 
 
// Zone for this RAC configuration is hingu.net
 
zone "hingu.net" in {
  type master;
  file "hingu.net.zone";
  allow-update { none; };
};
 
// For reverse lookups
 
zone "2.168.192.in-addr.arpa" in {
  type master;
  file "2.168.192.in-addr.arpa.zone";
  allow-update { none; };
};
 
zone "1.168.192.in-addr.arpa" in {
  type master;
  file "1.168.192.in-addr.arpa.zone";
  allow-update { none; };
};
 
include "/etc/rndc.key";


/var/named/chroot/var/named/hingu.net.zone
$TTL    1d
hingu.net.  IN    SOA   lab-dns.hingu.net. root.hingu.net. (
    100        ; se = serial number
    8h         ; ref = refresh
    5m         ; ret = update retry
    3w         ; ex = expiry
    3h         ; min = minimum
    )
 
    IN    NS    lab-dns.hingu.net.
 
; DNS server
 
lab-dns    IN    A    192.168.2.200
 
; RAC Nodes Public name
 
node1          IN    A    192.168.2.1
node2          IN    A    192.168.2.2
node3          IN    A    192.168.2.3
 
; RAC Nodes Public VIPs
 
node1-vip      IN    A    192.168.2.51
node2-vip      IN    A    192.168.2.52
node3-vip      IN    A    192.168.2.53
 
; Storage Network
 
nas-server IN    A    192.168.1.101
node1-nas  IN    A    192.168.1.1
node2-nas  IN    A    192.168.1.2
node3-nas  IN    A    192.168.1.3


/var/named/chroot/var/named/2.168.192.in-addr.arpa.zone

$TTL    1d
@   IN    SOA   lab-dns.hingu.net. root.hingu.net. (
    100        ; se = serial number
    8h         ; ref = refresh
    5m         ; ret = update retry
    3w         ; ex = expiry
    3h         ; min = minimum
    )
 
    IN    NS    lab-dns.hingu.net.
 
; DNS machine name in reverse
200        IN    PTR lab-dns.hingu.net.
 
; RAC Nodes Public Name in Reverse
 
1          IN    PTR node1.hingu.net.
2          IN    PTR node2.hingu.net.
3          IN    PTR node3.hingu.net.
 
; RAC Nodes Public VIPs in Reverse
 
51          IN    PTR      node1-vip.hingu.net.
52          IN    PTR      node2-vip.hingu.net.
53          IN    PTR      node3-vip.hingu.net.


/var/named/chroot/var/named/1.168.192.in-addr.arpa.zone

$TTL    1d
@   IN    SOA   lab-dns.hingu.net. root.hingu.net. (
    100        ; se = serial number
    8h         ; ref = refresh
    5m         ; ret = update retry
    3w         ; ex = expiry
    3h         ; min = minimum
    )
 
    IN    NS    lab-dns.hingu.net.
 
;  Storage Network Reverse Lookup
 
101          IN    PTR     nas-server.hingu.net.
1            IN    PTR     node1-nas.hingu.net.
2            IN    PTR     node2-nas.hingu.net.
3            IN    PTR     node3-nas.hingu.net.


/etc/resolv.conf (on RAC nodes):
search hingu.net
nameserver 192.168.2.200


Start the DNS Service (named):
service named start
chkconfig --level 35 named on


Enable Name Service Cache Daemon nscd: (On all the RAC Nodes)
chkconfig --level 35 nscd on
service ncsd start

Creating Oracle Users/Groups/Permissions and Installation Paths: (On all the RAC Nodes):
userdel oracle
groupdel oinstall
groupdel dba
groupadd -g 1000 oinstall
groupadd -g 1031 dba
useradd -u 1101 -g oinstall -G dba oracle
mkdir -p /u01/app/oracle
chown –R oracle:oinstall /u01/app/oracle
chmod -R 775 /u01
passwd oracle


Install cvuqdisk Package: (On all the RAC Nodes):

This package is located in the rpm directory on Clusterware Media and needs to be installed after the group oinstall is created. In my case, as this was a fresh install of 10g R2 on a new machines, old versions of cvuqdisk was not present. If it is, then the older version needs to be removed first.
export CVUQDISK_GRP=oinstall
echo $CVUQDISK
rpm –ivh cvuqdisk-1.0.1-1.rpm
 
[root@node1 rpm]# pwd
/home/oracle/10gr2/clusterware/rpm
[root@node1 rpm]# export CVUQDISK_GRP=oinstall
[root@node1 rpm]# echo $CVUQDISK_GRP
oinstall
[root@node1 rpm]# rpm -ivh rpm –ivh cvuqdisk-1.0.1-1.rpm
Preparing...                ########################################### [100%]
   1:cvuqdisk               ########################################### [100%]
[root@node1 rpm]# rpm -qa | grep cvuqdisk
cvuqdisk-1.0.1-1
[root@node1 rpm]#

Configure Oracle RAC Owner’s User Environment (oracle):

(a)    Set the umask to 022 by putting below line into these users’ (oracle) .bash_profile files:
umask 022
Then, executed the .bash_profile and verified that the correct value of umask is displayed.
[oracle@node1 ~]$ . .bash_profile
[oracle@node1 ~]$ umask

(b)   Setting up X11 forwarding:

Created the file ~/.ssh/config to disable the X11Forwadding by placing below line in it.
Host *
ForwardX11 no

(c)    Suppressed the Terminal output on STDOUT and STDERR to prevent Installation errors:
Modified the file ~/.bashrc (or .cshrc for C shellwith below entry.

Bourne, Bash, or Korn shell:
if [ -t 0 ]; then
stty intr ^C
fi

C shell:
test -t 0
if ($status == 0) then
stty intr ^C
endif 
(d)   Increased the Shell Limits:
Recommended:
Resource
Soft Limit
Hard Limit
Processes
2047
16384
Open File Descriptors
1024
65536
Stack
10240
10240  - 32768

set :
Resource
Soft Limit
Hard Limit
Processes
131072
131072
Open File Descriptors
131072
131072
Stack
32768
32768

Added the following lines to the /etc/security/limits.conf file: 
oracle   soft   nofile    131072
oracle   hard   nofile    131072
oracle   soft   nproc    131072
oracle   hard   nproc    131072
oracle   soft   core    unlimited
oracle   hard   core    unlimited
oracle   soft   memlock    3500000
oracle   hard   memlock    3500000
# Recommended stack hard limit 32MB for oracle installations
# oracle   hard   stack    32768

Added the following line in the /etc/pam.d/login file, if it does not already exist:
session required /lib/security/pam_limits.so

For the Bourne, Bash, or Korn shell,  add the following lines to the /etc/profile:
     if [ $USER = "oracle" ]; then
           if [ $SHELL = "/bin/ksh" ]; then
              ulimit -p 131072
              ulimit -n 131072
           else
              ulimit -u 131072 -n 131072
           fi
        fi

For the C shell (csh or tcsh), add the following lines to the /etc/csh.login.
       if ( $USER == "oracle" ) then
          limit maxproc 131072
          limit descriptors 131072
       endif


(e)   Set the below Kernel Parameters with recommended range in /etc/sysctl.conf. This was already set with the installation of oracle-validated package. I had to uncomment the lines related to 10g parameters and comment the same parameters for 11g. After the modification, ran the sysctl –p to enable the changes..

/etc/sysctl.conf
 # Kernel sysctl configuration file for Oracle Enterprise Linux
#
# For binary values, 0 is disabled, 1 is enabled.  See sysctl(8) and
# sysctl.conf(5) for more details.
 
# Controls IP packet forwarding
net.ipv4.ip_forward = 0
 
# Controls source route verification
net.ipv4.conf.default.rp_filter = 1
 
# Do not accept source routing
net.ipv4.conf.default.accept_source_route = 0
 
# Controls the System Request debugging functionality of the kernel
kernel.sysrq = 1
 
# Controls whether core dumps will append the PID to the core filename
# Useful for debugging multi-threaded applications
kernel.core_uses_pid = 1
 
# Controls the use of TCP syncookies
net.ipv4.tcp_syncookies = 1
 
# Controls the maximum size of a message, in bytes
kernel.msgmnb = 65536
 
# Controls the default maxmimum size of a mesage queue
kernel.msgmax = 8192
 
# Controls the maximum shared segment size, in bytes
kernel.shmmax = 4294967295
 
# Controls the maximum number of shared memory segments, in pages
kernel.shmall = 1073741824
# For 11g, recommended value for file-max is 6815744
#fs.file-max = 6815744
# For 10g, uncomment 'fs.file-max 327679', comment other entries for this parameter and re-run sysctl -p
 fs.file-max = 327679
kernel.msgmni = 2878
kernel.sem = 250 32000 100 142
kernel.shmmni = 4096
net.core.rmem_default = 262144
# For 11g, recommended value for net.core.rmem_max is 4194304
#net.core.rmem_max = 4194304
# For 10g, uncomment 'net.core.rmem_max 2097152', comment other entries for this parameter and re-run sysctl -p
 net.core.rmem_max=2097152
net.core.wmem_default = 262144
# For 11g, recommended value for wmem_max is 1048576
#net.core.wmem_max = 1048576
# For 10g, uncomment 'net.core.wmem_max 262144', comment other entries for this parameter and re-run sysctl -p
 net.core.wmem_max = 262144
fs.aio-max-nr = 3145728
# For 11g, recommended value for ip_local_port_range is 9000 65500
#net.ipv4.ip_local_port_range = 9000 65500
# For 10g, uncomment 'net.ipv4.ip_local_port_range 1024 65000', comment other entries for this parameter and re-run sysctl -p
 net.ipv4.ip_local_port_range = 1024 65000
# Added min_free_kbytes 50MB to avoid OOM killer on EL4/EL5
vm.min_free_kbytes = 51200
 



SSH user Equivalency configuration (oracle):

On All the Cluster Nodes:

su - oracle
mkdir ~/.ssh
chmod 700 ~/.ssh

Generate the RSA and DSA keys:

/usr/bin/ssh-keygen -t rsa
/usr/bin/ssh-keygen -t dsa

On node1:

touch ~/.ssh/authorized_keys
cd ~/.ssh

(a)    Add these Keys to the Authorized_keys file.

cat id_rsa.pub >> authorized_keys
cat id_dsa.pub >> authorized_keys

(b)   Send this file to node2.

scp authorized_keys node2:.ssh/

On node2:

(a)    Add these Keys to the Authorized_keys file.

cd ~/.ssh
cat id_rsa.pub >> authorized_keys
cat id_dsa.pub >> authorized_keys

(b)   Send this file to node3.

scp authorized_keys node3:.ssh/
On node3:

(a)    Add these Keys to the Authorized_keys file.

cd ~/.ssh
cat id_rsa.pub >> authorized_keys
cat id_dsa.pub >> authorized_keys

(b)   Send this file to node1 and node2.

scp authorized_keys node1:.ssh/
scp authorized_keys node2:.ssh/

On All the Nodes:
chmod 600 ~/.ssh/authorized_keys
 
ssh node1 date
ssh node2 date
ssh node3 date
ssh node1.hingu.net date
ssh node2.hingu.net date
ssh node3.hingu.net date
ssh node1-prv date
ssh node2-prv date
ssh node3-prv date

Entered 'yes' and continued when prompted

Configure the iSCSI Disk Device for OCR and Voting Disks (on All the RAC Nodes):

(a)    Placed the below line in the /etc/scsi_id.config
 options=-g

(b)   Got the scsi disk mappings. (from one of the RAC nodes)
[root@node1 ~]# ls -la /dev/disk/by-path/ | grep openfiler | awk '{ print $9 $10 $11 }'
ip-192.168.1.101:3260-iscsi-iqn.2006-01.com.openfiler:datadisk01-lun-0->../../sde
ip-192.168.1.101:3260-iscsi-iqn.2006-01.com.openfiler:datadisk01-lun-0-part1->../../sde1
ip-192.168.1.101:3260-iscsi-iqn.2006-01.com.openfiler:fradisk01-lun-0->../../sdd
ip-192.168.1.101:3260-iscsi-iqn.2006-01.com.openfiler:fradisk01-lun-0-part1->../../sdd1
ip-192.168.1.101:3260-iscsi-iqn.2006-01.com.openfiler:ocrdisk01-lun-0->../../sdg
ip-192.168.1.101:3260-iscsi-iqn.2006-01.com.openfiler:ocrdisk01-lun-0-part1->../../sdg1
ip-192.168.1.101:3260-iscsi-iqn.2006-01.com.openfiler:ocrdisk02-lun-0->../../sdh
ip-192.168.1.101:3260-iscsi-iqn.2006-01.com.openfiler:ocrdisk02-lun-0-part1->../../sdh1
ip-192.168.1.101:3260-iscsi-iqn.2006-01.com.openfiler:votingdisk01-lun-0->../../sdc
ip-192.168.1.101:3260-iscsi-iqn.2006-01.com.openfiler:votingdisk01-lun-0-part1->../../sdc1
ip-192.168.1.101:3260-iscsi-iqn.2006-01.com.openfiler:votingdisk02-lun-0->../../sdb
ip-192.168.1.101:3260-iscsi-iqn.2006-01.com.openfiler:votingdisk02-lun-0-part1->../../sdb1
ip-192.168.1.101:3260-iscsi-iqn.2006-01.com.openfiler:votingdisk03-lun-0->../../sdf
ip-192.168.1.101:3260-iscsi-iqn.2006-01.com.openfiler:votingdisk03-lun-0-part1->../../sdf1

(c)    Got SCSI IDs for all the OCRs and Voting Disks using scsi_id.
[root@node1 ~]# scsi_id -g -s /block/sdg/sdg1
14f504e46494c450073564b3158472d7943766d2d4c736459
[root@node1 ~]# scsi_id -g -s /block/sdh/sdh1
14f504e46494c4500786839656e792d75704b422d545a6e70
[root@node1 ~]#
[root@node1 ~]# scsi_id -g -s /block/sdc/sdc1
14f504e46494c45004d74494743652d384176312d5776594d
[root@node1 ~]# scsi_id -g -s /block/sdb/sdb1
14f504e46494c45007132726b4d4d2d6274616f2d33753456
[root@node1 ~]# scsi_id -g -s /block/sdf/sdf1
14f504e46494c450046305855714e2d324956712d674f4132
[root@node1 ~]#

(d)   Created the file /etc/udev/rules.d/99-crs.rules to label the scsi devices with the appropriate name so that after reboot of machine their name remain persistent every time.
KERNEL=="sd?1", BUS=="scsi", PROGRAM=="/sbin/scsi_id -g -s %p", RESULT=="14f504e46494c450073564b3158472d7943766d2d4c736459" , NAME="ocrdisk01", OWNER="root", GROUP="oinstall", MODE="0640"
KERNEL=="sd?1", BUS=="scsi", PROGRAM=="/sbin/scsi_id -g -s %p", RESULT=="14f504e46494c4500786839656e792d75704b422d545a6e70" , NAME="ocrdisk02", OWNER="root", GROUP="oinstall", MODE="0640"
KERNEL=="sd?1", BUS=="scsi", PROGRAM=="/sbin/scsi_id -g -s %p", RESULT=="14f504e46494c45004d74494743652d384176312d5776594d" , NAME="votingdisk01", OWNER="oracle", GROUP="oinstall", MODE="0640"
KERNEL=="sd?1", BUS=="scsi", PROGRAM=="/sbin/scsi_id -g -s %p", RESULT=="14f504e46494c45007132726b4d4d2d6274616f2d33753456" , NAME="votingdisk02", OWNER="oracle", GROUP="oinstall", MODE="0640"
KERNEL=="sd?1", BUS=="scsi", PROGRAM=="/sbin/scsi_id -g -s %p", RESULT=="14f504e46494c450046305855714e2d324956712d674f4132" , NAME="votingdisk03", OWNER="oracle", GROUP="oinstall", MODE="0640"

(e)   Reloaded the udev rules and started the udev services to make the changes effective.
udevcontrol reload_rules
start_udev 
(f)     Verified that these disks now using Following command 

ls -l /dev/ocrdisk*
ls -l /dev/votingdisk*
ls -la /dev/disk/by-path/ | grep openfiler |awk '{print &9 &10 &11}'

(g)   Created the Raw Bindings for OCR and Voting Devices (On All the RAC Nodes).

Placed the below lines into the /etc/sysconfig/rawdevices
# raw device bindings
# format:  <rawdev> <major> <minor>
#          <rawdev> <blockdev>
# example: /dev/raw/raw1 /dev/sda1
#          /dev/raw/raw2 8 5
 
/dev/raw/raw1 /dev/ocrdisk01
/dev/raw/raw2 /dev/ocrdisk02
 
/dev/raw/raw3 /dev/votingdisk01
/dev/raw/raw4 /dev/votingdisk02
/dev/raw/raw5 /dev/votingdisk03

Change the permissions and ownership of the raw devices as shown below.
 chown root:oinstall /dev/raw/raw1
chown root:oinstall /dev/raw/raw2
chown oracle:oinstall /dev/raw/raw3
chown oracle:oinstall /dev/raw/raw4
chown oracle:oinstall /dev/raw/raw5
chmod 640 /dev/raw/raw1
chmod 640 /dev/raw/raw2
chmod 640 /dev/raw/raw3
chmod 640 /dev/raw/raw4
chmod 640 /dev/raw/raw5

Restart the service rawdevices on all the nodes.
service rawdevices restart

Because the ownerships and permissions on the raw devices get reset to root on every reboot, the above lines were placed into /etc/rc.local to set the permissions back to oracle user after the reboot. (ON all the RAC Nodes):

/etc/rc.local:
[root@node1 sysconfig]# cat /etc/rc.local
#!/bin/sh
#
# This script will be executed *after* all the other init scripts.
# You can put your own initialization stuff in here if you don't
# want to do the full Sys V style init stuff.
 
touch /var/lock/subsys/local
 
chown root:oinstall /dev/raw/raw1
chown root:oinstall /dev/raw/raw2
chown oracle:oinstall /dev/raw/raw3
chown oracle:oinstall /dev/raw/raw4
chown oracle:oinstall /dev/raw/raw5
 
chmod 640 /dev/raw/raw1
chmod 640 /dev/raw/raw2
chmod 640 /dev/raw/raw3
chmod 640 /dev/raw/raw4
chmod 640 /dev/raw/raw5


Configure the iSCSI disk Devices for Oracle ASM with ASMLib:

(a)    Verified that the below RPMs are installed before configuring the ASM driver.

oracleasm-2.6.18-194.el5-2.0.5-1.el5
oracleasm-support-2.1.3-1.el5
oracleasm-2.6.18-194.el5xen-2.0.5-1.el5
oracleasm-2.6.18-194.el5PAE-2.0.5-1.el5
oracleasm-2.6.18-194.el5debug-2.0.5-1.el5
oracleasmlib-2.0.4-1.el5

(a)    Configured the ASMLib (All the RAC nodes):
Provide the oracleasm owner “oracle” and group “oinstall” while configuring the oracleasm.
oracleasm configure –i

(e)   Loaded the ASMLib Module (All the RAC nodes):
[root@node1 ~]# oracleasm init

(f)     Created the ASM disks using oracleasm: (ONLY from one of the RAC nodes)
oracleasm createdisk DATADSK01 /dev/sdd1
oracleasm createdisk FRADSK02 /dev/sde1
oracleasm scandisks
oracleasm listdisks
      
(g)    On the Remaining RAC nodes, simply scanned the ASM disks to instantiate these newly created disks
oracleasm scandisks
oracleasm listdisks


(h)   Verified that these ASM disk can be discovered by ASM Libraries (oracleasmlib) on all the RAC Nodes during Creation of ASM Disks.
Connected as “oracle” user and ran the below command
/usr/sbin/oracleasm-discover 'ORCL:*'
[oracle@node1 ~]# /usr/sbin/oracleasm-discover 'ORCL:*'
Using ASMLib from /opt/oracle/extapi/32/asm/orcl/1/libasm.so
[ASM Library - Generic Linux, version 2.0.4 (KABI_V2)]
Discovered disk: ORCL:DATADSK01 [40959968 blocks (20971503616 bytes), maxio 512]
Discovered disk: ORCL:FRADSK01 [20512736 blocks (10502520832 bytes), maxio 512]
[oracle@node1 ~]#

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