{"id":1480,"date":"2010-01-07T11:26:23","date_gmt":"2010-01-07T15:26:23","guid":{"rendered":"http:\/\/onlineappsdba.com\/index.php\/2010\/01\/07\/oracle-weblogic-server-node-manager-in-nutshell\/"},"modified":"2015-12-03T09:51:03","modified_gmt":"2015-12-03T13:51:03","slug":"oracle-weblogic-server-node-manager-in-nutshell","status":"publish","type":"post","link":"https:\/\/onlineappsdba.com\/index.php\/2010\/01\/07\/oracle-weblogic-server-node-manager-in-nutshell\/","title":{"rendered":"Oracle WebLogic Server : Node Manager in nutshell"},"content":{"rendered":"

Node Manager<\/strong> is utility in Oracle WebLogic Server<\/strong> to start , stop, restart Managed Server<\/strong> or Administration Server <\/strong>remotely.<\/p>\n

.<\/p>\n

Node Manager for WebLogic in nutshell<\/u><\/strong><\/p>\n

i)<\/strong> These are of two type \u2013 Java Based<\/strong> (runs under JVM) or Script Based<\/strong> (not available on windows)<\/p>\n

ii)<\/strong>For Windows Machine only Java Based Node Manager is supported where as for Unix\/Linux both Java Based and Script Based Node Manager are supported. Node Manager is\u00a0NOT<\/strong> supported on Open VMS, AS400 or Tru64<\/p>\n

iii) Java Based<\/strong> (more secure)\u00a0Node Manager is secured using SSL<\/strong> where as security in Script Based <\/strong>(less secure)\u00a0Node Manager is implemented more easily using ssh<\/strong> or rsh<\/strong><\/p>\n

iv)<\/strong> Node Manager is optional component <\/strong>in WebLogic Server\u00a0but it is mandatory if you want to start Managed Server from Console (other option is to start Managed Server from command line)<\/p>\n

v)<\/strong> Node Manager is also required for Whole Server Migration<\/strong> or Automatic Service Migration<\/strong>. Automatic Server Migration is supported only using<\/strong> Script Based Node Manager (more on Server Migration in WebLogic coming soon<\/span>)<\/p>\n

vi)<\/strong> Node Manager is installed on physical machine and is not linked to any Domain<\/strong>. If there are multiple domain on one machine , all domains can use same Node Manager.<\/p>\n

vii)<\/strong> You access Node Manager either from Administration Server<\/strong> (Environment -> Machines->Configuration->Node Manager) or from WLST<\/strong> (W<\/strong>ebL<\/strong>ogic S<\/strong>cripting T<\/strong>ool)<\/p>\n

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.<\/p>\n

viii)<\/strong> Default value for Node Manager listen port is 5556
\n<\/strong>
\nix)<\/strong> Key important configuration file<\/strong> for node manager are<\/p>\n

a) <\/strong>$WL_HOME\/common\/nodemanager\/nodemanager.properties<\/strong>– used by java based node manager. This file is created on first time start of nodemanager (startNodeManager.sh<\/strong>)<\/p>\n

b)<\/strong>$WL_HOME\/common\/nodemanager\/nodemanager.domains<\/strong> – contains mappings between the names of domains managed by Node Manager and their corresponding directories.<\/p>\n

entry like
\nbase_domain=\/oracle\/apps\/fmw\/user_projects\/domains\/base_domain
\nsoa_domain=\/oracle\/apps\/fmw\/user_projects\/domains\/soa_domain<\/p>\n

c)<\/strong>$WL_HOME\/common\/nodemanager\/nm_data.properties<\/strong>– This file stores the encryption data the Node Manager uses as asymmetric encryption key. This file is created on first time start of nodemanager (startNodeManager.sh)<\/p>\n

d) <\/strong>$DOMAIN_HOME\/config\/nodemanager\/nm_password.properties<\/strong>– This file stores the Node Manager username and password used by Admin Server to connect to Node Manager.<\/p>\n

Few other configuration files are boot.properties<\/strong>, startup.properties<\/strong>, server_name.addr<\/strong>, server_name.lck<\/strong>, server_name.pid<\/strong>, server_name.state<\/strong><\/p>\n

x)<\/strong> Key important Log file<\/strong> for node manager are
\na)<\/strong>$WL_HOME\/common\/nodemanager\/nodemanager.log<\/strong> – Node Manager Log file
\nb)<\/strong> $DOMAIN_HOME\/servers\/[server_name]\/logs\/server_name.out<\/strong> – Node Manager Server Instance Log File<\/p>\n

.<\/p>\n

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References<\/u><\/strong><\/p>\n