Handling Weblogic Cluster Domain

1. Weblogic Domain

2. Understanding Domains
What is Weblogic domain
AnOracleWebLogicServer administrationdomain isalogically relatedgroupof
OracleWebLogicServer resources. Domainsincludeaspecial OracleWebLogicServer
instancecalledtheAdministration Server, whichisthecentral pointfromwhichyou
configureandmanageall resourcesinthedomain. Usually, youconfigureadomainto
includeadditional OracleWebLogicServer instancescalledManaged Servers. You
deploy Webapplications, EJBs, Webservices, andother resourcesontotheManaged
ServersandusetheAdministrationServer for configurationandmanagementpurposes
only.

3. Understanding Domains
Organizing Domain
YoucanuseasingleOracleWebLogicServer installationtocreateandrunmultiple
domains, or youcanusemultipleinstallationstorunasingledomain.

4. Understanding Domains
Contents of Domain
● Admin Server
● Managed Server
● Managed Server
Clusters
● Resource and Services
●

5. Understanding Domains
Restrictions on Domain
● EachdomainrequiresitsownAdministrationServer for performingmanagement
activities. WhenyouusetheAdministrationConsoletoperformmanagementand
monitoringtasks, youcanswitchback andforthbetweendomains, butindoingso,
youareconnectingtodifferentAdministrationServers.
● All ManagedServersinacluster mustresideinthesamedomain; youcannotsplita
cluster over multipledomains.
● All ManagedServersinadomainmustrunthesameversionof theOracle
WebLogicServer software. TheAdministrationServer may runeither thesame
versionastheManagedServersinthedomain, or alater patchset.
● Eachdomainmustreferenceitsowndatabaseschema. Youcannotsharea
configuredresourceor subsystembetweendomains

6. Domain Configuration File
Description of Domain Configuration Files
● Central Configuraion file
DOMAIN_NAME/config/config.xml
● Security Credential
<embedded-ldap>
<credential-encrypted>{3DES}encypted-value-here</credential-encrypted>
</embedded-ldap>

7. Domain Directory Contents
● Domain-name
● Autodeploy
● Bin
● config
● Config/lib
● Config/node-
manager
● Config/securit
y
● Console-ext
● Pending
● Security
● servers
● Servers/server-
name
● ConfigAarchiv
e
● Lib
● init-info
● Config/cache
● Config/jdbc
● Config/jms
● Config/diagno
stics

8. Domain Configuration Change
Overview of Change management
● XML Document
● Read-Only MBeans
● Read-Write Mbeans
●

9. Domain Configuration Change
Overview of Change management
● Dynamic Change
● Non-Dynamic Change

10. Domain Configuration Change
Overview of Change management
● Administration Console
● Weblogic Scripting Tools
● JMX APIs

11. Domain Configuration Change
Change Management in Administrative
Console
TheWebLogicServer Administration
Consolecentralizestheconfiguration
changemanagementprocessinthe
ChangeCenter pane

12. Domain Configuration Change
Configuration Change Management
Process
1. WhentheAdministrationServer starts, itreadsthedomain'sconfigurationfiles,
includingconfig.xml fileandany subsidiary configurationfilesreferredtoby the
config.xml fileandusesthedatatoinstantiatethefollowingMBeantreesin
Memory:
● A read-only treeof ConfigurationMBeansthatcontainsthecurrentconfigurationof
resourcesthatareontheAdministrationServer.
● Aneditabletreeof all ConfigurationMBeansfor all serversinthedomain.

13. Domain Configuration Change
Configuration Change Management
Process
2. Toinitiateaconfigurationchange, youdothefollowing:
a. Obtainalock onthecurrentconfiguration.
b. Makeany changesyoudesire, usingthetool of your choice(theAdministration
Console, WLST, the JMX APIs, and such).
c. Saveyour changestoapendingversionof theconfig.xml file, usingthe
Save buttonintheAdministrationConsole; usingtheWLST save command;
or usingthesave operationontheConfigurationManagerMBean.

14. Domain Configuration Change
Configuration Change Management
Process
TheConfigurationManager servicesavesall datafromtheeditMBeantreetoaseparate
setof configurationfilesinadirectory namedpending.
Thepending directory isimmediately below thedomain'srootdirectory. Forexample, if
your domainisnamedmydomain, thenthedefaultpathnameof thependingconfig.xml fileis
mydomain/pending/config.xml.

15. Domain Configuration Change
Configuration Change Management
Process
4.Makeadditional changesor undochangesthatyouhavealready made.
5. Whenyouareready, activateyour changesinthedomain, usingtheActivate
Changes buttonintheAdministrationConsole'sChangeCenter; usingtheWLST
activate command; or usingtheactivate operationonthe
ConfigurationManagerMBean.