{"id":163,"date":"2007-07-15T04:42:00","date_gmt":"2007-07-15T08:42:00","guid":{"rendered":"http:\/\/onlineappsdba.com\/?p=163"},"modified":"2007-10-03T14:44:47","modified_gmt":"2007-10-03T18:44:47","slug":"orcale-rac-part-iii-clone-rac1-to-rac2-and-user-equivalency","status":"publish","type":"post","link":"https:\/\/onlineappsdba.com\/index.php\/2007\/07\/15\/orcale-rac-part-iii-clone-rac1-to-rac2-and-user-equivalency\/","title":{"rendered":"Orcale RAC Part III – Clone RAC1 to RAC2 and User Equivalency"},"content":{"rendered":"

This is fourth post on step by step building Oracle RAC Database on your desktop \/ laptop using VMWare (Virtual Machine)<\/p>\n

For previous three posts visit<\/p>\n

Try installing Orcale RAC on your laptop<\/a>
\nRAC Part I – Install Virtual Machine and Linux<\/a>
\nRAC Part II – Install Virtual Disk and Network Card<\/a><\/p>\n

In this post you will<\/p>\n

–Clone RAC1 to RAC2 and change IP address of RAc2
\n–Configure User equivalency for Orale Clusterware installation
\nClone RAC1 to RAC2<\/strong>
\n——————————-<\/strong><\/p>\n

– Make sure virtual linux machine is shutdown
\n-Copy folder rac1<\/strong> to folder rac2<\/strong> in c:\\Atul\\VMWARE (This is on windows laptop\/machine<\/span>)<\/p>\n

<\/a><\/p>\n

–In both RAC1 and RAC2 folder open \u201cRed Hat Enterprise Linux 3.vmx<\/strong>\u201d (This is virtual machine configuration file<\/span><\/em>) using notepad or wordpad<\/p>\n

–Add following lines (This will avoid locking for shared files and two linux machines RAC1 and RAC2 can start together using shared files votingdisk, crs and asm<\/span><\/em>)<\/p>\n


\ndisk.locking = “FALSE”
\ndiskLib.dataCacheMaxSize = “0”
\ndiskLib.dataCacheMaxReadAheadSize = “0”
\ndiskLib.dataCacheMinReadAheadSize = “0”
\ndiskLib.dataCachePageSize = “4096”
\ndiskLib.maxUnsyncedWrites = “0”
\n<\/strong><\/p>\n

–Now on vmx file of RAC2 \u201cRed Hat Enterprise Linux 3.vmx\u201d change following lines from displayName = “RAC1” <\/strong>to displayName = “RAC2”
\n<\/strong>
\n–On VMWare Server Console, Click on File and Open or \u201cCtrl + O\u201d<\/p>\n

<\/a><\/p>\n

–Click on Browse and select \u201cred hat enterprise linux 3.vmx<\/em>\u201d from RAC2<\/strong> directory<\/p>\n

—Now you should see two linux machines RAC1 and RAC2 on VMWare Console<\/em><\/p>\n

<\/a><\/p>\n

Start RAC1 and RAC2 and when you get below warning on RAC2, select create and click OK<\/p>\n

<\/a><\/p>\n

Make sure you can start both machine at same time, if you get message like unable to lock files<\/strong>, check you have added following lines in both machines vmx files mentioned above (regarding disk locking)<\/em><\/p>\n

Change Network Settings (IP) on RAC2<\/strong>
\n————————————————-<\/p>\n

Login as ROOT<\/strong> user in RAC2 machine and click System Setting<\/strong> -> Network<\/strong><\/p>\n

<\/a><\/p>\n

Select eth0<\/strong> and click on Edit<\/strong><\/p>\n

<\/a><\/p>\n

Change Address from 192.168.1.101<\/strong> to <\/strong>192.168.1.102<\/strong><\/p>\n

Click on Hardware Device<\/strong> Tab and Click on Probe<\/strong> button<\/p>\n

<\/a><\/p>\n

—Repeat steps for second network card<\/strong> eth1 and change its IP from 192.168.0.101<\/strong> to 192.168.0.102<\/strong><\/p>\n

Make sure you clicked probe on eth1 as well as shown above<\/p>\n

<\/a><\/p>\n

Activate both network cards by clicking on Activate as shown below<\/p>\n

<\/a><\/p>\n

<\/a><\/a><\/p>\n

If you get error message that eth0 has different MAC address expected<\/strong> as shown below; make sure you have clicked on probe on \u201cBind to Mac Address\u201d on \u201cHardware Device\u201d mentioned above.<\/p>\n

<\/a>Make sure both network cards are active now, as shown below<\/p>\n

<\/a><\/p>\n

Add following entry in \/etc\/hosts file of both RAC1 and RAC2<\/strong><\/p>\n

####<\/p>\n

127.0.0.1 loalhost.localdomain localhost
\n192.168.1.102 rac2.focusthread.com rac2 rac2-vip.focusthread.com rac2-vip
\n192.168.0.102 rac2-priv.focusthread.com rac2-priv
\n192.168.1.101 rac1.focusthread.com rac1 rac1-vip.focusthread.com rac1-vip
\n192.168.0.101 rac1-priv.focusthread.com rac1-priv
\n<\/strong><\/p>\n

###<\/p>\n

Now trying to ping RAC2 machine from RAC1 and RAC1 machine from RAC2<\/p>\n

<\/a><\/a><\/p>\n

Change Host Name of newly cloned RAC2<\/strong><\/p>\n

————————————————-<\/strong><\/p>\n

Follow below step on how to change hostname on RAC2 (newly cloned) Linux machine<\/p>\n

Open file \/etc\/sysconfig\/network<\/strong> and edit line like : HOSTNAME=XXXXX i.e. from<\/p>\n

HOSTNAME rac1.focusthread.com To<\/strong> HOSTNAME rac2.focusthread.com<\/p>\n

Configure User Equivalency<\/strong><\/p>\n

———————————–<\/strong><\/p>\n

User equivalency for user oracle<\/strong> is required so that user oracle from RAC1 can communicate to user oracle <\/strong>on RAC2 machine without prompting for password for clusterware to work properly.<\/p>\n

–Login as user oracle in machine RAC1<\/p>\n

–Make sure sshd daemon is running (pgrep sshd), If not start it from root user like \u201cservice start sshd<\/strong>\u201d<\/p>\n

–Create RSA and DSA key on each node <\/strong><\/p>\n

-From oracle user go to user home directory by \u201ccd $HOME\u201d or type cd and press enter
\n-mkdir .ssh (note that there is dot before ssh which means this is hidden directory)
\n-chmod 700 .ssh
\n-ssh-keygen \u2013t rsa
\n-ssh-keygen \u2013t dsa<\/p>\n

press enter when prompted for file to save the key and passphrase (check screenshot for more information)<\/p>\n

<\/a><\/p>\n

\u201cRepeat this on both the nodes i.e. RAC1 and RAC2<\/strong>\u201dAdd keys to authorized key file (authorized_keys) <\/strong><\/p>\n

————————————————————<\/strong><\/p>\n

-cd .ssh<\/p>\n

-touch authorized_keys
\n-ls (You should see authorized_keys, id_dsa, id_dsa.pub, id_rsa, id_rsa.pub. Here pub files are dsa and rsa public key file and id_dsa and id_rsa are private key files<\/em>)<\/p>\n

ssh rac1 cat \/home\/oracle\/.ssh\/id_rsa.pub >> authorized_keys
\nssh rac1 cat \/home\/oracle\/.ssh\/id_dsa.pub >> authorized_keys
\nssh rac2 cat \/home\/oracle\/.ssh\/id_rsa.pub >> authorized_keys
\nssh rac2 cat \/home\/oracle\/.ssh\/id_dsa.pub >> authorized_keys<\/p>\n

Send authorized_keys from RAC1 to RAC2 <\/strong><\/p>\n

scp authorized_keys rac2:\/home\/oracle\/.ssh<\/p>\n

<\/a><\/p>\n

From RAC1 machine as user oracle
\nexec \/usr\/bin\/ssh-agent $SHELL
\n\/usr\/bin\/ssh-add<\/p>\n

<\/a>Test User Equivalency<\/strong> (User oracle can login to other machine without password prompt<\/span><\/em>)<\/p>\n

—————————-<\/p>\n

ssh rac1 date<\/p>\n

ssh rac2 date<\/p>\n

Test this from both nodes RAC1 and RAC2 (You should not be prompted for oracle user password<\/em>)For more information on User Equivalency visit chapter 2 (Page 51 to 53) of clusterware and rac installation guide<\/p>\n

Coming Next : <\/span><\/strong><\/p>\n

Installing clusterware on RAC1 and RAC2<\/p>\n

Installing RAC database on RAC1 and RAC2 linux machines using ASM<\/p>\n

http:\/\/teachMeOracle.com\/forum<\/p>\n","protected":false},"excerpt":{"rendered":"

This is fourth post on step by step building Oracle RAC Database on your desktop \/ laptop using VMWare (Virtual […]<\/p>\n","protected":false},"author":115,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[424,36],"tags":[],"class_list":["post-163","post","type-post","status-publish","format-standard","hentry","category-database","category-rac"],"yoast_head":"\nOrcale RAC Part III - Clone RAC1 to RAC2 and User Equivalency -<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/onlineappsdba.com\/index.php\/2007\/07\/15\/orcale-rac-part-iii-clone-rac1-to-rac2-and-user-equivalency\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Orcale RAC Part III - Clone RAC1 to RAC2 and User Equivalency -\" \/>\n<meta property=\"og:description\" content=\"This is fourth post on step by step building Oracle RAC Database on your desktop \/ laptop using VMWare (Virtual […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/onlineappsdba.com\/index.php\/2007\/07\/15\/orcale-rac-part-iii-clone-rac1-to-rac2-and-user-equivalency\/\" \/>\n<meta property=\"article:published_time\" content=\"2007-07-15T08:42:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2007-10-03T18:44:47+00:00\" \/>\n<meta property=\"og:image\" content=\"http:\/\/bp3.blogger.com\/_LrtEX0cTLgI\/Rpnm_N4wg5I\/AAAAAAAAAv0\/0H3jc3mC048\/s400\/vmlnx44.jpg\" \/>\n<meta name=\"author\" content=\"Masroof Ahmad\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Masroof Ahmad\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/onlineappsdba.com\/index.php\/2007\/07\/15\/orcale-rac-part-iii-clone-rac1-to-rac2-and-user-equivalency\/\",\"url\":\"https:\/\/onlineappsdba.com\/index.php\/2007\/07\/15\/orcale-rac-part-iii-clone-rac1-to-rac2-and-user-equivalency\/\",\"name\":\"Orcale RAC Part III - 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