all you need to know about nodemanager - Oracle MVA · PDF fileNode Manager is a WebLogic...
Transcript of all you need to know about nodemanager - Oracle MVA · PDF fileNode Manager is a WebLogic...
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by Jacco H. Landlust
Node Manager
all you need to know about
for
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Jacco H. Landlust
• 35 years old
• Deventer, the Netherlands
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Jacco H. Landlust / iDBA
• Independent Red Stack Administrator
• Oracle since 2000
• Oracle ACE since 2006
• iDBA since 2010
• Architecture, Clustering, High Availability, Performance & Management
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Agenda• Introduction of Node Manager
• How Node Manager Works
• Configuration of Node Manager
• Using Node Manager
• Q & A
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Why Would You Need One?
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Node Manager is a WebLogic Server utility that
enables you to start, shut down, and restart Administration Server and Managed Server instances from a remote location.
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Node Manager Administrator's Guide for Oracle WebLogic Server (E13740-03)
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What You can do with Node Manager
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Node Manager is a WebLogic Server utility that
enables you to start, shut down, and restart Administration Server and Managed Server instances from a remote location.
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Start, Shut down & Restart• Start with pre-defined startup properties
• Shut down upon request
• Restart upon failure
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Node Manager is a WebLogic Server utility that
enables you to start, shut down, and restart Administration Server and Managed Server instances from a remote
location.
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Accessing Node Manager• Administration Server
• WebLogic Scripting Tool (WLST)
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Node Manager is a WebLogic Server utility that
enables you to start, shut down, and restart Administration Server and Managed Server instances
from a remote location.
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Agenda• Introduction of Node Manager
• How Node Manager Works
• Configuration of Node Manager
• Using Node Manager
• Q & A
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Versions
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Java-Based
Script-Based
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Configuration Files• nodemanager.properties
• nodemanager.domains
• nm_data.properties / SerializedSystemIni.dat
• nm_password.properties
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Expected in Node Manager
Home
One set of files per
Node Manager
Expected in Domain Home
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nodemanager.properties• central configurationfile
• located in NodeManagerHome
• commandline overrides property file
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nodemanager.domains• Specifies the domains that a Node Manager instance controls
• syntax: domain-name=domain-directory
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nm_data.properties &nm_password.properties
• nm_data.properties / SerializedSystemIni.dat stores the encryption data the Node Manager uses as a symmetric encryption key.
• nm_password.properties stores the encrypted Node Manager username and password
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Expected in Server Home
Server Specific Configuration Files• boot.properties
• startup.properties
• server_name.addr
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• server_name.lck
• server_name.pid
• server_name.state
startup.properties
Each Managed Server instance has its own startup.properties file with properties that control how Node Manager starts up and controls the server. Node Manager automatically creates this file by using properties passed to Node Manager when the Administration Server was last used to start the server. This allows a Node Manager client or startup scripts to restart a Managed Server using the same properties last used by the Administration Server.
For more information on startup.properties, see Step 6: Setting Server Startup Properties. These properties correspond to the server startup attributes contained in ServerStartMBean and the health monitoring attributes in ServerStartMBean.
This file is located in DOMAIN_HOME/servers/server_name/data/nodemanager.
server_name.addr
server_name.addr stores the IP address added when a server starts or is migrated. This file is generated after the server IP address is successfully brought online during migration.server_name.addr is deleted when the IP address is brought offline. The server IP address is used to validate remove requests to prevent addresses being erroneously removed while shutting down the server.
This file is located in DOMAIN_HOME/servers/server_name/data/nodemanager.
server_name.lck
server_name.lck is generated by each server and contains an internally used lock ID.
This file is located in DOMAIN_HOME/servers/server_name/data/nodemanager.
server_name.pid
server_name.pid is generated by each server and contains the process ID of the server. Node Manager checks the process ID generated by the server during crash recovery.
This file is located in DOMAIN_HOME/servers/
One Set of Files per Server nmGenBoot
StartupProps
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Logfiles• Node Manager Log File
• Server Instance Log Files
• WebLogic Server Log Files
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Information at multiple levels
Depending upon issue
check different logfile
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Agenda• Introduction of Node Manager
• How Node Manager Works
• Configuration of Node Manager
• Using Node Manager
• Q & A
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Node Manager Config Files• If they don’t exist, the config files are generated upon first
startup
• Do not store config files at default location
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Software Tree should be
read-only
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Set Basic Properties• DomainsFile
• NodeManagerHome
• javaHome
• JavaHome
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• LogFile
• ListenPort
• PropertiesVersion
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Specify Username & Password• nm_password.properties
• nmEnroll()
• Only change after
• you create domain from config.sh GUI
• you unpacked the domain on new location
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Specify Username & Password
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MOS ID 1146793.1
How to check/verify/modify Node Manager username & password?
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Specify Username & Password
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• The user-configuration file contains an encrypted username and password.
• The key file contains a secret key that is used to encrypt and decrypt the username and password.
• Only the key file that originally encrypted the username and password can decrypt the values.
• If you lose the key file, you must create a new user-configuration and key file pair.
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Store Credentials
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Caution:
You must ensure that only authorized users
can access the key file.
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Store Credentials
Protect files with OS security
Files can be stored on
external device (USB stick)
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• java weblogic.Admin -username username [ -password password] [ -userconfigfile config-file ] [ -userkeyfile keyfile ] STOREUSERCONFIG
• storeUserConfig([userConfigFile], [userKeyFile], [nm])
• Protect these Files!
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Store Credentials
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Plain versus SSL• Default SSL with demo certificates
• SecureListener in nodemanager.properties
• One Way SSL only
• Do not run production on demo certificates
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SSL: configurationKeyStores=CustomIdentityAndCustomTrustCustomIdentityAlias=*host*CustomIdentityKeyStoreFileName=<config>/ssl/*host*_identity.jksCustomIdentityKeyStorePassPhrase=*****CustomIdentityKeyStoreType=JKSCustomIdentityPrivateKeyPassPhrase=*****CustomTrustKeyStoreFileName=<config>/ssl/truststore.jks
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in nodemanager.properties
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SSL: Identity Store• Uniquely and securely identify yourself
• If custom CA’s are not in cacerts File, include in Indentity Store
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cacerts can be found at
$JAVA_HOME/jre/lib/security
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SSL: Trust Store• Knowledge of whom to trust
• Default CA’s
• When self signed, store identity in TrustStore
• Keytool and non-default TrustStore
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SSL
-Dweblogic.security.SSL.trustedCAKeyStore
when using non default CA store.
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for internal applications
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CrashRecoveryEnabled• Allows restart of a server after a system crash
• Start managed servers with Node Manager (not from shell)
• Based upon contents of server_name.lck, server_name.pid & server_name.state
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Do not use together with other inittab or other
process protector
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DomainsDirRemoteSharingEnabled• NMHostName property in servers startup.properties
• While starting the server, Node Manager sets the NMHostName property
• While recovering the server, Node Manager compares the NMHostName property with the HostName on which it is currently running. Upon match Node Manager will recover the server.
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Useful in setups with shared filesystems
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Agenda• Introduction of Node Manager
• How Node Manager works
• Configuration of Node Manager
• Using Node Manager
• Q & A
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Start Node Manager• Classic startup script in MW_HOME
• From WLST: startNodeManager([verbose], [nmProperties])
• set CLASSPATH && java [java_option=value ...] -D[nodemanager_property=value] -D[server_property=value] weblogic.NodeManager
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java -Xms32m -Xmx200m -Djava.security.policy=${WL_HOME}/server/lib/weblogic.policy -DPropertiesFile=/u01/app/oracle/admin/nodemanager/${DOMAIN}/nodemanager.properties
-DNodeManagerHome=/u01/app/oracle/admin/nodemanager/${DOMAIN} -DQuitEnabled=true weblogic.NodeManager -v &
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wlst, rlwrap & Node Manager• rlwrap runs the specified command, intercepting user input in
order to provide readline’s line editing, persistent history and completion.
• Do not start Node Manager while using wlst with rlwrap
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Node Manager will be “child” of rlwrap and die
upon exit on rlwrap
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Stop Node Manager• From WLST: stopNodeManager()
• Kill the process from the OS
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Not so elegant, but frequently found at
customer sites
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Run Node Manager as a Service• installNodeMgrSvc.cmd
• rc.d service
• opmn / Grid Infrastructure
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Connect to Node Manager• nmConnect([username, password], [host], [port],
[domainName], [domainDir], [nmType])
• nmConnect([userConfigFile, userKeyFile], [host], [port], [domainName], [domainDir], [nmType])
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Check Status
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Check Status• Reachable
• weblogic.nodemanager.NMConnectException
• javax.net.ssl.SSLHandshakeException
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Starting Administration Server
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Starting Managed Server
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Starting a Server, some Reminders
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• through WLST: nmStart
• Startup arguments are retrieved from Administration Server
• If startup.properties exists, that superseeds whatever is configured in WebLogic
• CrashRecoveryEnabled and DomainsDirRemoteSharingEnabled influence boot sequence
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Check Server Status• nmServerStatus
• Node Manager checks:
• server_name.lck
• server_name.pid
• server_name.state
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Shut down Server
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Shutdown Server, some Reminders• nmKill
• No such thing as a graceful shutdown from Node Manager
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This is all you need to know about WebLogic’s Node Manager
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Sources of Information• Node Manager Administrator's Guide for Oracle WebLogic
Server (E13740-03 / E21050-02)
• http://oraclemva.wordpress.com/2011/02/16/new-parameter-in-nodemanager-properties/
• http://www.veriton.co.uk/roller/fmw/entry/ssl_for_weblogic_server_11g
• http://www.countzero.fi/blog.html?id=16
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Questions?
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zaterdag 8 december 12