Asadmin Webinar 12 Feb 2009
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GlassFish Admin CLI - asadmin (Past, Present and Future) Kedar Mhaswade [email protected] Jane Young [email protected] February 12 th 2009
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ASAdmin, the GlassFish CLI console. Second try
Transcript of Asadmin Webinar 12 Feb 2009
GlassFish Admin CLI - asadmin(Past, Present and Future)
Kedar Mhaswade [email protected] Young [email protected] 12th 2009
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Agenda
• What asadmin is ...• GlassFish V2.x asadmin• What GlassFish V2 asadmin Lacked• Enter GlassFish V3• Interactive Command Development• Exciting Features Planned• References• Questions?
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What asadmin is ...
Asadmin is:> Well, a Hidden Gem ;)> Extensive, Powerful, Scriptable Administrative
Command Line Interface for GlassFishCLIP Compliant Grammar
> A Very Stable InterfaceCountless Scripts Depend on itSavior for Automated Test Scripts
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What asadmin is … (Quiz Time)
Did you know?> Asadmin Manages Multiple Domains> Securely Administers on Single Port
Speaks Beloved (?) HTTP> Has ~ 250 Commands (+/-)> Has a DSL (well, sort of) in Dotted Names
Number of Commands is ReducedCryptic Till You Get Them
> Has a Minimal Shell
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What asadmin is … (Architecture, sort of)
Server Software is Complex, NeedsSetup Commands (Local)
Create-domain, create-node-agent ...Server Management Commands (Remote)
Server Implements Most CommandsParsed Command Line + RPC Transport is HTTP
Admin
Server (DAS)CLI Admin Server (DAS)
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GlassFish V2.x asadmin
A Java HTTP/JMX Client to DASSeveral Generic JMX Commands
Uses JSR-160 (Little-Known) ImplementationHTTP/S
Has Parsing Framework and CommandsUsed Elsewhere (cli-framework)
Some Form of PluggabilityOpenESB IntegrationCLIDescriptor.xml
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GlassFish V2.x asadmin
Provides CRUD Support (Configuration)Generic Set/Get/ListMonitoring (vmstat/prstat)Super-set of GUI
Not Just Domain.xmlKeyword Search/ManpagesIntegration
DatabaseOperating System (SMF)
Properties
Files
List Set/Get
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What it Lacks ...•Rather Monolithic
>Hard to Extend, Plug Commands In>Not Dynamic
•A Powerful/Useful Shell>Too Many Commands to Remember and
Key-in!•Integration with Scripting Languages•Separation of Options (Command, asadmin)
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Enter V3 (Prelude)
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Changes in v3 asadminServer Became Pluggable/Modular
Asadmin Had to FollowA Rigorous Look at Command
A Command Line With a GrammarA Set of Options and Operands (Parameters)A Java Class Implementing Functionality
Adequate Hooks Into InfrastructureData Transfer Between Client and Server
Strings, Baby!
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Changes in v3 asadmin – II Command Line Remains
Parsing Moves to ServerA General Purpose Injection Manager
Injects Params into ObjectA Command is a POJO with
AdminCommand AnnotationA Set of @ParamsA Report Filled In
@AdminCommand (name=”mycmd”)public class FooCommand {@Param String name; //--name@Param String value; // -- value@Param Boolean enabled; //
public void execute(AdminCommandContextContext) { …}}
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Changes in v3 asadmin – III Data Transfer
A Simple Get/Post HTTP RequestGet for URIPost for FileUploadGrizzly Adapter at the Server End
java.util.Manifest (Yikes!) Coming BackOther Formats Totally Possible (hk2-agent)
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Changes in v3 asadmin – IV As a Result, You as a Command Developer (and App Server Enhancer)
Create Your Module/Container/WhateverIdentify Admin Commands and Name ThemCreate Pojo's With @Param(s)Write Business Logic and Return the ResultDrop in Module.jar in /modules FolderRun asadmin mycmd –opt1=v1 –opt2=v2 ...Forget Command Line Parsing
And Get CLI for your Module for Free
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V3 asadmin – How Commands Are Received
Grizzly Adapter Called AdminAdapterEntertains Authenticated Requests OnlyContext Root: host:admin-port/__asadminSupports StreamingIntercepts ALL Admin RequestsReads the Input Stream for POST and Uploads Files (Deploy)Invokes the CommandsReturns the Result to OutputStream
Writes a Manifest for CLI/NetBeansWrites an HTML for Browser Invocation
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V3 asadmin – How Authentication Works
Only Admin Users Should Be Able to ManageRequires HTTP BASE64 Authentication
Admin-Realm (A File Realm – Remember admin-keyfile)?CLI Sends a BASE64-Encoded UserName and PasswordProvision of the so-called Anonymous LoginOf Course Not Secure
Need SSLCertificate Exchange
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V3 asadmin – Are We Doing Enough?
Enter V3 FCS
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V3 FCS asadmin
Build the Icing on the CakeNo Changes to Basic API
A Powerful ShellAliasHistoryCompletion, Navigation
Separation of Options--host is NOT an option for create-cluster!
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V3 FCS asadmin – II
A Shell In the Browser?Cool and Useful, No Installation Required
Add a Ruby GemGem install asadmin!
irb>> require 'asadmin'irb>> domain = Domain.new(“localhost”);irb>> domain.each_application do { |app|puts “app: #{app.name}, type: #{app.type}”
}
app: trade2 type: webapp: Twitterfeed type: jruby
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V3 FCS asadmin – III
A Client-side Preferences FileShould asadmin be an OSGi System?
Local Commands Made Pluggable
Many More CommandsFeature Parity With V2 Developer Profile
And Compatibility
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What Are Others Doing?JBoss 5.0 GA:• No changes in administration for the past 3 years. Same scripts: run,
shutdown, twiddle (JMX based)
• No commands for deployment. Applications are manually copied to the deploy directory.
• No monitoring and diagnostics support
BEA (Oracle) WebLogic 10g:• WLST – manages server lifecycle, deployment, diagnostics, navigation of
MBeans
• Hard to follow syntax. e.g. Invoke a Mbean Object:wls> = . ( [ . . ( " " ) ] , . . )obj s j array array j ava l ang St r i ng oamserver j ava l ang Obj ect
wls> = . ( [ " . . " ] , . . )st rs j array array j ava l ang St r i ng j ava l ang St r i ng
wls> ( ' ' , , )i nvoke l ookupServer obj s st rs
• Command category to WLST is not extensible
GF asadmin : Most powerful and user friendly amongst all others!
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Got Questions?
