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The Construction of RAC by Oracle 11gR2 (3)-- Environment Detection before installing grid

System environment:

Operating system: RedHat EL5

Cluster: Oracle GI (Grid Infrastructure)

Oracle: Oracle 11.2.0.1.0

As shown in the figure: RAC system architecture

Before installing GI, you can detect the environment as a grid user.

Verify the installation environment as the grid user (in the grid installation package directory)

[grid@node1 grid] $. / runcluvfy.sh stage-pre crsinst-n node1,node2-fixup-verbose-indicates the location of "failed" in the test Fixup.1 is required, Software package (all nodes) to be installed configure yum installation environment: [root@node1 yum.repos.d] # cp rhel-debuginfo.repo yum.repo [root@node1 yum.repos.d] # lsrhel-debuginfo.repo yum.repo [root@node1 yum.repos.d] # cat yum.repo [Base] name=Red Hat Enterprise Linux baseurl= file:///media/Serverenabled=1gpgcheck=0gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release mount linux ISO CD: [root@ Node1 yum.repos.d] # mount / dev/hdc / media installation software: libaio-devel.i386 0VOR 0.3.106-5 sysstat.i386 0RH 7.0.2-3.el5 unixODBC-2.2.11-7.1unixODBC-devel-2.2.11-7.1unixODBC-kde-2.2.11-7.12, Configure trust relationships between users (oracle and grid) to establish oracle between nodes, Trust between grid users (establishing public and private keys through ssh) = Oracle=1) generate a key pair (all nodes) [oracle@node1 ~] $ssh-keygen-t rsaGenerating public/private rsa key pair.Enter file in which to save the key (/ home/oracle/.ssh/id_rsa): Enter passphrase (empty for no passphrase): Enter same passphrase again: Your identification has been saved in / home/oracle/.ssh/id_rsa.Your public key has been saved in / home/oracle/.ssh/ Id_rsa.pub.The key fingerprint is:64:a6:4a:77:db:33:a4:aa:6e:ca:8f:5f:2f:77:0f:40 oracle@node1 [oracle@node1 ~] $ssh-keygen-t dsaGenerating public/private dsa key pair.Enter file in which to save the key (/ home/oracle/.ssh/id_dsa): Enter passphrase (empty for no passphrase): Enter same passphrase again: Your identification has been saved in / home/oracle/.ssh/id_dsa.Your Public key has been saved in / home/oracle/.ssh/id_dsa.pub.The key fingerprint is:7c:41:b5:0f:81:06:ad:30:07:4f:8b:1a:9b:94:68:14 oracle@node12) configure trust relationship [oracle@node1 ~] $ls .sshid _ dsa id_dsa.pub id_rsa id_rsa.pub known_ hosts [oracle @ node1 ~] $cat .ssh / id_rsa.pub > > .ssh/authorized_ keys [oracle @ oracle @] Node1 ~] $cat .ssh / id_dsa.pub > > .ssh/authorized_ Keys [oracle @ node1 ~] $ssh node2 cat .ssh / id_rsa.pub > > .ssh/authorized_keysoracle@node2's password: [oracle@node1 ~] $ssh node2 cat .ssh / id_dsa.pub > > .ssh/authorized_keysoracle@node2's password: [oracle@node1 ~] $scp .ssh / authorized_keys node2:~/.sshoracle@node2's password: authorized_keys 1992 2.0KB/s 00:00 3) verify the trust relationship (all nodes) [oracle@node1 ~] $ssh node2 dateThu May 2 14:46:30 CST 2013 [oracle@node1 ~] $ssh node2-priv dateThe authenticity of host 'node2-priv (10.10.10.2)' can't be established.RSA key fingerprint is 16:28:88:50:27:30:92:cb:49:be:55:61:f6:c2: A1:3f.Are you sure you want to continue connecting (yes/no)? YesWarning: Permanently added 'node2-priv 10.10.10.2' (RSA) to the list of known hosts.Thu May 2 14:47:03 CST 2013 [oracle@node1 ~] $ssh node1 dateThu May 2 14:48:19 CST 2013 [oracle@node1 ~] $ssh node1-priv dateThe authenticity of host 'node1-priv (10.10.10.1)' can't be established.RSA key fingerprint is 39:04:88:3b:54:34:3c:34:d2:df:74:37:fe:5f:92:2d.Are You sure you want to continue connecting (yes/no)? YesWarning: Permanently added 'node1-priv,10.10.10.1' (RSA) to the list of known hosts.Thu May 2 14:48:35 CST 2013 installation grid = steps are the same as oracle @ so far, preparations for GI installation are almost complete.

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