Remotely domain extension using WLST

WebLogic latest version 12.2.x come up with different WebLogic domain templates and their usage methods in WLST. Usually WebLogic domain can be created with base domain template using wls.jar. Then after that domain need to be customized as the projects where we need the extended domain.

1. When the domain spread across multiple machines/nodes
2. One successful configuration domain reuse to create new domains

Here is small experiment with the domain template, here we have two nodes associated with  192.168.33.100 - Machine100 and 192.168.33101 - Machine101 IP addresses and machine. The admin server configured in the Machine100 and also two web servers in webcluster, two app servers in appcluster. The whole configuration we need in Machine101.

Earlier to WebLogic 12.2 version we have pack and unpack option only for the domain expansion in the remote machine otherwise copy the domain folder need to copy. 

In the latest versions of WebLogic 12.2.x above are having different WLST methods that relates to template usage.

Remotely extension of WebLogic Domain using WLST and pack-unpack

Lets explore options available in WLST

selectTemplate() in WLST

There are multiple domain templates, extension templates for domains are available in Oracle WebLogic installation media pack it self. Some of the application specific templates also available with the media pack.

selectCustomTemplate() in WLST

We can create our own WebLogic domain template using writeTemplate() that will be containing the project specific configurations such as - servers, cluster, JDBC, JMS are pre-configured and reusable. The select custom template method followed by loadTemplate command.

loadTemplates() in WLST

The loadTemplates(0 is the command always used after selectTemplate or selectCustomTemplate commands.

Automation solution: Create domain template and configure domain

Like here we need to create extension domain in the Machine101, you may need to to do for multiple machines in production environments.

The process is simplified into few steps

1. connect to the existing domain
2. Read the domain and generate the custom domain template
3. Create the extended domain enter the same domain name and path or fresh domain can be configured with the new domain name, listen address modification as required

#======================================
# 
# File: remoteDomain.py
# Applicable WebLogic version: 12.2.x
# This will solve pack and unpack strange issues
#
#===============================================
def printline(s):
    print "-"*10 + s
 
def createDomainTemplate(templateLocation):
    
    ''' Generate the custom domain template  '''
    connect(admuser,admpass,admurl)
    
    print ("Writing Custom Template...")
    writeTemplate(templateLocation)
    print ("Writing Template...: Completed")
    disconnect()
    
def create_Domain(templateLocation, domainPath):
 ''' Creating extended domain remotely 
 selectCustomTemplate, loadTemplates will get the inputs
 then writeDomain will create the domain '''
 
 selectCustomTemplate(templateLocation)
 loadTemplates()
 print ("Creating extended domain...")
 writeDomain (domainPath)
 closeTemplate()
 print ("Creating domain...: Completed")
       
       
def main():
 '''
 Change the following values according to your domain
 user security better to use storeuserconfig
 and domain template 
 you can move these variables into properties file
 '''
 templateLocation ='/u01/app/oracle/prod_domain_template.jar'
 domainPath='/u01/app/oracle/prod_domain'
 admuser='weblogic'
 admpass='welcome1'
 admurl='192.168.33.100:8001'
 
 createDomainTemplate(templateLocation)
 create_Domain(templateLocation, domainPath)
    
if __name__ == "__main__":
    printline()
    print("SCRIPT BEING RUN DIRECTLY")
    printline()
    main()
 printline()

Remotely execution of script

WLST SCRIPT

Logging configuration for domain and WebLogic server

Why we need Logging?
To understand in a basic level, when we run the WebLogic Servers we don't know what is happening inside the process.  It is kind of black box to us. To know what is happening inside the domain or server side to get more details we have logging mechanism enabled in WebLogic domains.

WebLogic Logging works for multiple hierarchical Subsystem. At the top level it is already enabled and we can use the existing setup. But for some reasons each project will have separate logging needs.

When we can use this?
If there are multiple Testing logging configuration at different levels:

1. domain level logs - global status 
2. Server level logs - admin or managed server status
3. Resource level logs - JDBC, JMS, application status

We can set the common attributes of JMX MBean reset with new values which will work for your project needs.

While creating this snippet we have tried to execute it on WebLogic 11g [10.3.6] and WebLogic 12c.

########################################################################
# Python Script file: logrotate.py
# Author: Pavan Devarakonda
# Date : 25-Jul-2017
########################################################################
loadProperties('demodomain.properties')
# Functions
def editMode():
   edit()
   startEdit()

def saveActivate():
   save()
   activate()
   print '###### Completed configuration of domain logs ##############'

def exitDisconnect():
        disconnect()
        exit()

def connectToAdmin():
    connect(username,password,url)

def domainlog_rotation(domainname,FC,MinSize):
        """
        It will take the three parameters domainpath ,domainname is string values
        and FileCount -  FC and File MinSize - MinSize are integer values these values loaded from properties
        so they need to type cast to integers
        """
        cd('/Log/'+domainname)
        cmo.setRotationType('bySize')
        cmo.setRotateLogOnStartup(true)
        cmo.setFileCount(int(FC))
        cmo.setNumberOfFilesLimited(true)
        cmo.setFileMinSize(int(MinSize))
        cmo.setLogFileRotationDir(domainpath+domainname+'/RotationDir')
        save()

def ServerLogRotation(S,SFC,SMinsize):
        """
        This module will rotate the AdminServer or Managed Server loggger settings
        It takes three params - S as name of the server, SFC - Server FileCount, SMinsize - Server FileMinSize
        """
        print S+ ' server log  setting...'
        cd('/Servers/'+S+'/Log/'+S)
        cmo.setRotationType('bySize')
        cmo.setRotateLogOnStartup(true)
        cmo.setFileCount(int(SFC))
        cmo.setNumberOfFilesLimited(true)
        cmo.setFileMinSize(int(SMinsize))
        cmo.setLogFileRotationDir(domainpath+domainname+'/RotationDir +S')

def printline(): print '#'*50

def main():
        printline(); print 'Starting domain logs Configurations '; printline()
        connectToAdmin()
        editMode()
        domainlog_rotation(domainname,FC,MinSize)
        printline(); print 'Starting Server logs configurations' ; printline()
        cd('/')
        for server_name in ls('Servers',returnMap='true'):
                if server_name == 'AdminServer':
                        ServerLogRotation(server_name,ASFC,ASMinsize)
                else:
                        ServerLogRotation(server_name,MSFC,MSMinsize)
        saveActivate()
        exitDisconnect()

main()

Please double check all indentation blocks.
The properties file used for sample tests is as follows:

#WebLogic console connection parameters
username=weblogic
password=welcome1
url=t3://192.168.33.102:8001
domainname=demo_domain

# Domain logger configurations
FC=4
MinSize=5
domainpath=/u01/oracle/domains/

# ManagedServer logger configurations
MSFC=3
MSMinsize=2

# AdminServer logger configurations
ASFC=5

Sample execution output as follows:

WebLogic Logger enabled and configuration using WLST scrpt execution.

WebLogic 12c Cluster Domain configuration using WLST offline

Objective of this script is to Leverage the time takes to configure the WebLogic Domain and after starting the admin server then following list need to be configured for HA/reliability.
Everytime I work on new project there is a need of creation of the clustered domain. From my past experiences collected all basic requirements together list them over here.

• AdminServer configuration includes Name, Listen Address, ListenPort
• User credentials username, password
• After writing basic domain going for create machine which include Name, type of machine
• Nodemaager includes NMTypes such as plain, ssl, hosted node, nodemanager port
• Managed servers have Name, ListenAddress, ListenPort, set machine
• Cluster includes name, ClusterAddress, Servers part of the cluster interesting part here

Assumptions for this task:

• Vagrant Ubuntu launched
• Java and WebLogic Installed
• wlst alias into bash profile

WLST Configuring WebLogic Cluster Domain

In the script as per my convenience some of them are hardcoded, My hardcoded values:

1. Managed Server list
2. Cluster list

In this script lots of Python sequence functions are used.

• List index, 
• Dictionary keys
• String startwith

Lets begin the fun of WLST HERE...

# purpose:  Create the domian with the one Admin Server along with the
# two managed servers in each cluster. app_cluster, web_cluster
# Assumption here all managed servers runs on the same machine
# Modified date: 07-April-2017
# File name     :       create_clusterdomain.py
# Dependencies  :       cluster_domain.properties
# Note this names of managed servers, cluster, hostname all hard coded
#
def printline(s):
    print "-"*10 + s

loadProperties('/u01/app/software/scripts/pybin/cluster_domain.properties')

# Created a Cluster and assaign the servers to that cluster
# Create a domain from the weblogic domain template

WLHOME=os.environ["WL_HOME"]
readTemplate(WLHOME+'/common/templates/wls/wls.jar')
printline("reading template completed")

# Configure the Administration Servers with out using SSL Port

cd('Servers/AdminServer')
set('ListenAddress',WLSAdminIP)
set('ListenPort', int(AdminPort))

printline("AdminServer ListenAddress, port set")

cd('/')
cd('Security/base_domain/User/weblogic')
cmo.setPassword(AdminPasswd)
printline("User credentials set")

setOption('OverwriteDomain', 'true')
writeDomain(DomainPath+'/'+DomainName)
printline("Domain creation done.")

closeTemplate()
readDomain(DomainPath+'/'+DomainName)
machines={'myM100':'192.168.33.100', 'myM110':'192.168.33.110'}

for m in machines.keys():
        cd('/')
        create(m, 'UnixMachine')
        cd('Machine/' + m)
        create(m, 'NodeManager')
        cd('NodeManager/' + m)
        set('ListenAddress', machines[m])
        set('NMType','ssl')

# Create the Managed Servers and  configuration them
ManagedServerList=['app01','app02','web01','web02']

app_ca=""
web_ca=""
for s in ManagedServerList:
        cd('/')
        create(s,'Server')
        cd('Server/'+s)
        i=ManagedServerList.index(s)
        lp=8101+i
        set('ListenPort', int(lp))
        j=int(s[-1])
        m=machines.keys()[j-1]
        set('ListenAddress', machines[m])
        set('Machine', m)

        if s.startswith('app') :
                if j%2==0:
                        app_ca+=','
                app_ca+=machines[m]+':'+str(lp)

        elif s.startswith('web'):
                if j%2==0:
                        web_ca+=','
                web_ca+=machines[m]+':'+str(lp)

        printline("Managed server :"+s+" created")

printline("configured managed servers done.")
printline("app cluster address:"+app_ca)
printline("Web cluster address:"+web_ca)

# Create and Configure a Cluster and assian the Managed Servers to that cluster
clusters={'app_clustr1':'app01,app02', 'web_clustr1':'web01,web02'}
clstrs=clusters.keys()
for c in clstrs:
        cd('/')
        create(c,'Cluster')
        assign('Server', clusters[c],'Cluster', c)
        cd('Clusters/'+c)
        set('ClusterMessagingMode','multicast')
        if c.startswith('app'):
                set('ClusterAddress',app_ca)
        elif c.startswith('web'):
                set('ClusterAddress',web_ca)
        set('MulticastAddress','237.0.0.101')
        set('MulticastPort',7200+clstrs.index(c))
        printline("cluster "+c+" created")

printline("Configured clusters and assigned managed servers done.")
#Write the domain and Close the domain template

updateDomain()
closeDomain()

printline("Task completed successfully, exiting!!!")
exit()

Now the properties file which you can enhance with your limitations

WLSAdminIP=192.168.33.100
AdminPort=8001
AdminPasswd=welcome1
DomainPath=/u01/app/oracle/domains
DomainName=uat_domain

Lets have the execution screen for you:

Please write your valuable feedback on this post, so that we can keep improve further to have more interesting fun stuff soon for you.