Cross platform configuration management using Desired State Configuration
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The document discusses cross-platform configuration management using Desired State Configuration (DSC) in PowerShell, highlighting its capabilities in continuous delivery and integration. It covers the architecture of DSC, including configuration storage and logging, as well as the ease of custom resource authoring for both Windows and Linux environments. The presentation also includes a demo of the DSC API and the functionality of key cmdlets for managing configurations.
Cross platform configuration management using Desired State Configuration
- 1. CROSS-PLATFORM CONFIGURATION MANAGEMENT WITH DESIRED STATE CONFIGURATION Ravikanth C Windows PowerShell MVP PowerShellMagazine.com @ravikanth
- 2. AGENDA • DSC PRIMER • DEMO
- 3. DSC PRIMER • Address challenges in – Continuous Delivery and Integration – Configuration Management • Management Platform – Available for Windows and Linux/Unix • Provides – Language Extensions – Resources – PowerShell Cmdlets • Declarative Style (DSL) • Push and Pull configuration delivery
- 4. DSC PRIMER What about these and many others?
- 5. DSC PRIMER • Configuration Management as an API • Write your own tools to – Author – Stage – Push – Monitor • Or use 3rd-party tools such as ScriptRock GaurdRail and so on!
- 6. DSC PRIMER • Configuration is stored at: – Windows: C:WindowsSystem32Configuration – Linux: /opt/omi-1.0.8/etc/dsc/configuration • Current.mof – Present configuration (N) • Backup.mof – Copy of Current.mof • Pending.mof – Configuration changes pending • Previous.mof – N-1 configuration • MetaConfig.mof – LCM configuration
- 7. DSC PRIMER • DSC logs provide insight into configuration changes and issues • Windows: Event Logs – Applications and Services Logs/Microsoft/Windows/Desired State Configuration • Linux: /opt/omi-1.0.8/var/log
- 8. DSC IN ACTION & DSC API Demo
- 9. DSC PRIMER • Custom resource authoring is easy! – Heard of Modules? • For Windows OS – Script Modules – Binary Modules in C# – MI Provider (native code) • For Linux OS – MI Provider
- 10. BACKUP
- 11. DECLARATIVE SYNTAX Configuration ArchiveDemo { Node SRV3-WS2012R2 { Archive ArchiveDemo { Path = "10.10.10.101BackupScripts.zip" DestinationPath = "C:Scripts" Ensure="Present" } } } ArchiveDemo .PS1
- 12. DSC ARCHITECTURE
- 13. LCM API CIM Method PowerShell Cmdlet SendConfigurationApply Start-DscConfiguration SendConfiguration - ApplyConfiguration - GetConfiguration Get-DscConfiguration Rollback Restore-DscConfiguration TestConfiguration Test-DscConfiguration StopConfiguration - SendMetaConfigurationApply Set-DscLocalConfigurationManager GetMetaConfiguration Get-DscLocalConfigurationManager PerformRequiredConfigurationChecks -
- 14. Custom Resources • Three Functions – Get-TargetResource – Set-TargetResource – Test-TargetResource Start Test- TargetResource Set- TargetResource False End True