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Top Weblogic Tasks You can
Automate Now
Prepared by: Mrityunjay Kant
Practice Manager, SOA & Integration Services AST Corporation
Session ID#: 10506
Specialized. Recognized. Preferred.
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Agenda
■ About Weblogic Server
■ Weblogic tasks you can Automate Now
■ Weblogic Cluster Administration
■ Q&A
Weblogic Server – Introduction
■ #1 in worldwide Application Server Software
■ The Foundation for Oracle Applications and Middleware Technologies Platform
■ The Foundation for Cloud Applications and Application Infrastructure Consolidation
■ Supported features such as
Java EE Standards
Scalability/Clustering
Monitoring & Management
Enterprise Security
Enterprise Messaging
Linear Scalability
Coherence etc…
What is Weblogic Scripting (WLST)?
■ Scripting Interface to Weblogic server
■ Based on Java Scripting Interpreter - Jython
■ Provides repeatable process for propagating configuration
changes across environments
■ Quickly allow environments to be replicated and migrated
Interaction Modes
■ Interactive
▪ Enter a command and view response at a command-line prompt
▪ In online mode shell maintains a persistent connection to a WLS instance
■ Script
▪ Text file with a .py extension
▪ Executed using Jython commands for running scripts
▪ Invoke a series of WLST commands without requiring your input
■ Embedded
▪ Instantiate WLST interpreter in your Java code
Connection Modes
■ Analogous to the
Configuration Wizard
■ Read and write access to the configuration data that is
persisted in the domains configuration directory or domain template JAR
■ Intended to create domain or modify a non-running domain
■ Used during WLS install to create samples domain
■ Analogous to the
Administration Console
■ JMX client
■ Interacts with server’s MBeans
■ Intended as runtime management tool:
configuration, management, deployment and monitoring
WLST Offline Can/Can’t Do
■ Create/modify templates
■ Create domains
■ Extend domains
■ Access and modify
configurations for offline domain
■ View runtime performance data
■ Modify security data
Can Do Can’t Do
WLST Online Can/Can’t Do
■ Change Configuration
■ View runtime data
■ Deploy applications
■ Start/stop servers
■ Create a domain (must be offline mode)
Invoking WLST (Online)
■ Ensure you have the Weblogic server installed!
■ Remember all commands are case sensitive
■ Set the run env with following script:
▪ WL_HOME\server\bin\setWLSEnv
■ Enter following command to run WLST:
▪ java weblogic.WLST
■ Starts in offline mode
■ Connect to domain ▪ wls:/(offline)>
Traversing Mbean Trees
■ Simpler than JMX – no need to know JMX object name
■ Mbeans are hierarchical, similar to a file system, with DomainMBean at top of tree
■ Use commands similar to Unix to traverse
▪ cd(), ls()
■ Syntax is same as WLST offline
Domain MBean (root)
Available Mbean Trees
■ domainConfig
▪ Configuration hierarchy of the entire domain; represents configuration MBeans in RuntimeMBeanServer
■ domainRuntime
▪ Hierarchy of runtime Mbeans for entire domain; read only
■ serverConfig
▪ Configuration hierarchy (configuration Mbeans) of the server you are connected to; read only
■ serverRuntime
Available Mbean Trees
■ edit
▪ Writable domain configuration with pending changes; represents configuration MBeans in EditMBeanServer
■ jndi
▪ Read-only JNDI tree for the server you are connected to
■ custom
▪ List of custom MBeans
Switching Between Trees
■ Use appropriate command to move to a different tree
▪ domainConfig() ▪ serverConfig() ▪ domainRuntime() ▪ serverRuntime() ▪ edit() ▪ jndi() ▪ custom()
Changing Configuration (Online)
Step Syntax
Change to the edit tree wls:/wl_server/domainConfig> edit()
Get an edit lock wls:/wl_server/edit> startEdit()
Make Changes wls:/wl_server/edit !> cmo.createServer(managedServer1”) wls:/wl_server/edit !> cd('/Servers/managedServer1') wls:/wl_server/edit !> cmo.setListenPort(8001) wls:/wl_server/edit !> cmo.setListenAddress(“my-address”)
Save and implicitly validate your changes wls:/wl_server/edit !>save()
Current Management Object
■ CMO variable – current management object
▪ Java bean that serves as proxy for direct access to the WLS MBean
▪ Makes it easy to interact with Mbean – get and set attributes, other commands
▪ Always set to the current WLST path
▪ Only available for WLS MBeans, not custom MBeans
■ Example:
▪ wls:/mydomain/edit>
cmo.setAdministrationPort(9091)
Start/Stop Server
■ Invoke WLST
▪ java weblogic.WLST
■ Connect to Node Manager
▪ nmConnect('weblogic', 'welcome1', 'localhost', '5556',
'mydomain',’/usr/oracle/wls/user_projects/domai ns/mydomain',‘plain')
■ Start Server (can be admin or managed server)
▪ nmStart(‘serverName’)
■ Stop Server
▪ nmKill(‘serverName’)
■ Server Status
Server Lifecycle commands using WLST
■ You can also manage server lifecycle through WLST without using node manager commands
■ startServer – start the Administration server
■ start – Start a managed server instance or cluster using
Node Manager
■ suspend – Suspend a running server
■ resume - Resume a suspended server
■ shutdown – Gracefully shutdown a running server instance
or cluster
Scripting Basics
■ Each Script has 4 basic parts
▪ Import Section
▪ Global Variables
▪ Definitions – class/functions
▪ Main program
■ Data Types
▪ Base Datatypes integer, float, long, char, str, bool
▪ Collection Types list, dictionary, tuple, sequences, maps etc
Automated start Admin Server
■ Create a domain.properties file
■ Create a Start_Admin.py script file
■ Execute the script from command line or shell/batch script
Send Email on Server state
■ Ready to use script, just change Admin email
■ Does not need cron job for scheduling!
■ Admin server need not be running for this script to run
■ More reliable than just checking serer logs
■ Bonus Script – send email on application status!
Create a Data Source
■ Can create multiple data sources with one script
■ Properties file contains all details for data sources
■ Can be used for creation of a new environment
■ Execute using following command:
Start/Stop Data Source
■ To shutdown a data source:
connect(‘weblogic’,welcome1’,'t3://localhost:7001')
domainRuntime()
cd(‘ServerRuntimes/AdminServer/JDBCServiceRuntime/AdminServer/ JDBCDataSourceRuntimeMBeans/TestDS’)
objectArray = jarray.array([], java.lang.Object)
stringArray = jarray.array([], java.lang.String)
invoke(‘shutdown’, objectArray, stringArray)
exit()
Forcibly Rotate Server Logs
■ Comes handy if the log file is too big
■ Can be run anytime as needed
■ Ability to adjust max log file size
Deploy Apps
■ Allow deployment of apps using script
■ Can recursively pick apps form a dir and deploy
▪ List of applications specified in property file
■ Easy setup of a new env!
■ Can also be used to un-deploy applications.
Creating Users and Groups
■ Can create multiple users and groups with one script
■ Properties file contains all details for users and groups
■ Can be used for creation of a new environment
■ Execute using following command:
Disable/Enable Admin Console
■ Provides additional security
■ Prevents unauthorized access
■ May be required by policy or for audit compliance
■ Disable Admin console
connect("weblogic","welcome1","t3://localhost:7001") edit() startEdit() cmo.setConsoleEnabled(false) save() activate() disconnect() exit()
What is a Cluster?
■ Multiple Servers running together as one unit
■ Can be on same or different machines
■ Appears to clients as a single unit
Why Cluster?
■ Scalability
■ High-Availability
■ Application Fail over
■ Load Balancing
What can be clustered?
■ Servlets
■ JSPs
■ EJBs
■ Remote Method Invocation (RMI) objects
■ Java Messaging Service (JMS) destinations
■ Web Services (if cluster aware)
■ These cannot be clustered:
▪ File services including file shares
Dynamic Clusters
■ Server instances that can be scaled at runtime
■ Meets peak application needs
■ Can be destroyed when not needed
Clustering Best Practices
■ Plan for clusters from Day 1
▪ High Availability
▪ Scalability
▪ Zero downtime upgrades!
■ Use scripts to monitor managed server states
■ Keep log rotation in check
■ Configure In-Memory Replication
▪ HTTP Session state management
■ Ask developers to design idempotent services for clusters
▪ Use Weblogic Clustering API
■ Don’t put cluster nodes in DMZ – Web and Application Nodes
■ Use logical DNS names instead of IP addresses
Thank You!
Mrityunjay Kant
Please complete the session
evaluation
We appreciate your feedback and insight
