Linux + Oracle 10g RAC dual Nic binding and unbinding implementation (1)

This article mainly introduces the implementationOracle 10gDatabaseRACFunctionalBind two NICsWith the implementation method of Unbinding, let's take a look at this process.

I. Overview of software and hardware Environments

Two redhet Enterprise-R4-U4 systems rac1 and rac2 are installed on the Virtual Machine VMware GSX Server, and the oracle10g RAC environment is built on the virtual shared storage.

1. rac1 two NICs: eth0: 192.168.2.111, eth1: 10.10.10.11.

2. rac2 two NICs: eth0: 192.168.2.112 and eth1: 10.10.10.12.

/Etc/hosts file:

127.0.0.1	Localhost
192.168.2.111	Rac1.mycorpdomain.com	Rac1
192.168.2.13	Rac1-vip.mycorpdomain.com	Rac1-vip
10.10.10.11	Rac1-priv.mycorpdomain.com	Rac1-priv
192.168.2.112	Rac2.mycorpdomain.com	Rac2
192.168.2.14	Rac2-vip.mycorpdomain.com	Rac2-vip
10.10.10.12	Rac2-priv.mycorpdomain.com	Rac2-priv

2. Add the network adapter eth2

1. Add a NIC in host-only mode on rac1 and rac2 respectively.

A. Edit virtual machine

B. Add to add hardware wizard. Next Step

C. Select ethernet adapter.

D. Select host-only.

2. Start the VM. At this time, ifconfig-a can see an extra Nic eth2, but there is no IP address. On the hardware option page of the network configuration graphic interface, you can see eth2 and the status is OK.

3. Stopping databases and crs on rac1 and rac2

 
 

  
  
# Cd/u01/app/oracle/product/10.2.0/crs_1/bin
  
  
 
  
  
Stop a database instance
  
  
 
  
  
#./Srvctl stop instance-d devdb-I ora. devdb. devd1.inst
  
  
 
  
  
#./Srvctl stop instance-d devdb-I ora. devdb. devd2.inst
  
  
 
  
  
Stop Database
  
  
 
  
  
#./Srvctl stop database-d devdb
  
  
 
  
  
Stop an ASM instance
  
  
 
  
  
#./Srvctl stop asm-n rac1
  
  
 
  
  
#./Srvctl stop asm-n rac2
  
  
 
  
  
Stop vip, gsd, listener, ons
  
  
 
  
  
#./Srvctl stop nodeapps-n rac1
  
  
 
  
  
#./Srvctl stop nodeapps-n rac2
 
 

4. Change Nic configuration and bind Nic

Change the configuration files of eth0 and eth2, and bind eth0 and eth2 to a virtual network card bond0.

1. First create a virtual Nic bond0 configuration file ifcfg-bond0 under/etc/sysconfig/network-scripts/

 
 

  
  
#cd /etc/sysconfig/network-scripts/  
  
  
 
  
  
#vi ifcfg-bond0  
  
  
 
  
  
DEVICE=bond0 
  
  
 
  
  
BOOTPROTO=none 
  
  
 
  
  
BROADCAST=192.168.2。255  
  
  
 
  
  
IPADDR=192.168.2.111  
  
  
 
  
  
NETMASK=255.255.255.0  
  
  
 
  
  
NETWORK=192.168.2.0  
  
  
 
  
  
ONBOOT=yes 
  
  
 
  
  
TYPE=Ethernet 
  
  
 
  
  
USERCTL=no 
  
  
 
  
  
PEERDNS=yes 
  
  
 
  
  
GATEWAY=192.168.168.250  
  
  
 
  
  
IPV6INIt=no 
 
 

2. Change the configuration file ifcfg-eth0 for eth0, the changed content is as follows

 
 

  
  
Vi ifcfg-eth0  
  
  
 
  
  
DEVICE=eth0 
  
  
 
  
  
BOOTPROTO=none 
  
  
 
  
  
ONBOOT=yes 
  
  
 
  
  
TYPE=Ethernet 
  
  
 
  
  
USERCTL=no 
  
  
 
  
  
MASTER=bond0 
  
  
 
  
  
SLAVE=yes 
 
 

3. Add the configuration file ifcfg-eth2 of eth2

 
 

  
  
Vi ifcfg-eth2  
  
  
 
  
  
DEVICE=eth2 
  
  
 
  
  
BOOTPROTO=none 
  
  
 
  
  
ONBOOT=yes 
  
  
 
  
  
TYPE=Ethernet 
  
  
 
  
  
USERCTL=no 
  
  
 
  
  
MASTER=bond0 
  
  
 
  
  
SLAVE=yes 
 
 

4. Because the linux virtual Nic is implemented in the kernel module, you must install the module. Add the following content to the/etc/modules. conf file. If the file does not exist, create a new one ):

 
 

  
  
alias bond0 bonding  
  
  
 
  
  
options bond0 miimon=100 mode=0 primary=eth0 
 
 

Among them, miimon = 100 indicates that the link connection status is checked every Ms. If not, the physical Nic is switched. mode = 1 indicates that the active and standby modes, that is, only one Nic is active, only failure protection is provided. If mode = 0, it is in Server Load balancer mode. All network adapters are active, and some other modes are rarely used. primary = eth0 indicates that eth0 is the default active network adapter in Master/Slave mode.

5. Add modprobe bonding miimon = 100 mode = 0 to/etc/rc. local.

6. Make the same modification on rac2.

7. It takes effect after restart. ifconfig-a check shows that the bond0 Nic is added, and the ip Address configuration of eth0 is configured. bond0 is also added to the graphic interface of network configuration.

5. Start gsd and ons of crs

Stop the database and crs on rac1 and rac2, and only start gsd and ons of crs.

 
 

  
  
# Cd/u01/app/oracle/product/10.2.0/crs_1/bin
  
  
 
  
  
Stop a database instance
  
  
 
  
  
#./Srvctl stop instance-d devdb-I ora. devdb. devd1.inst
  
  
 
  
  
#./Srvctl stop instance-d devdb-I ora. devdb. devd2.inst
  
  
 
  
  
Stop Database
  
  
 
  
  
#./Srvctl stop database-d devdb
  
  
 
  
  
Stop an ASM instance
  
  
 
  
  
#./Srvctl stop asm-n rac1
  
  
 
  
  
#./Srvctl stop asm-n rac2
  
  
 
  
  
Stop vip, gsd, listener, ons
  
  
 
  
  
#./Srvctl stop nodeapps-n rac1
  
  
 
  
  
#./Srvctl stop nodeapps-n rac2
  
  
 
  
  
#./Crs_start ora. rac1.gsd
  
  
 
  
  
#./Crs_start ora. rac1.ons
  
  
 
  
  
#./Crs_start ora. rac2.gsd
  
  
 
  
  
#./Crs_start ora. rac2.ons
 
 

6. Change VIP to bond0 Nic as root user in rac1

 
 

  
  
#cd  /u01/app/oracle/product/10.2.0/crs_1/bin  
  
  
 
  
  
#./srvctl modify nodeapps –n rac1 –A 192.168.2.13/255.255.255.0/bond0  
  
  
 
  
  
#./srvctl modify nodeapps –n rac1 –A  rac1-vip/255.255.255.0/bond0 
 
 

7. Change VIP to bond0 Nic as root user in rac2

 
 

  
  
#cd  /u01/app/oracle/product/10.2.0/crs_1/bin  
  
  
 
  
  
#./srvctl modify nodeapps –n rac2 –A 192.168.2.14/255.255.255.0/bond0  
  
  
 
  
  
#./srvctl modify nodeapps –n rac2 –A  rac2-vip/255.255.255.0/bond0 
 
 

8. Confirm the changed vip configuration

 
 

  
  
#./srvctl config nodeapps –n rac1 –a  
  
  
 
  
  
VIP exists.:/rac1-vip.mycorpdomain.com/192.168.2.13/255.255.255.0/bond0  
  
  
 
  
  
#./srvctl config nodeapps –n rac2 –a  
  
  
 
  
  
VIP exists.:/rac2-vip.mycorpdomain.com/192.168.2.14/255.255.255.0/bond0 
 
 

9. After the modification is completed, start the database-related process

 
 

  
  
#./srvctl start nodeapps –n rac1  
  
  
 
  
  
#./srvctl start nodeapps –n rac2  
  
  
 
  
  
#./crs_start ora.rac1.ASM1.asm  
  
  
 
  
  
#./crs_start ora.rac2.ASM2.asm  
  
  
 
  
  
#./crs_start ora.devdb.db 
 
 

10. view the crs status

# Crs _ stat-t

It can be seen from the above that all processes are in normal state and bound successfully.