How can I update the configuration of the LCM without over-writing it

DSC
1

Hello

I read a blog post which said if I want to set the DebugMode setting on the LCM I can so the following

[DSCLocalConfigurationManager()]
Configuration LCMDebugMode {
    Node localhost {
        Settings {
            ConfigurationMode    = 'ApplyOnly'
            RefreshMode          = 'Push'
            Debugmode            = 'ForceModuleImport'
        }
    }
}

LCMDebugMode -OutputPath $directoryPath
Set-DscLocalConfigurationManager -Path $directoryPath -Verbose
Get-DscLocalConfigurationManager
The above works but it over-writes my original LCM configuration (e.g. pull server address and all the other settings)
I use Azure Automation DSC (so there are several settings related to Azure when you display the LCM settings like so (I changed the GUID slightly)
ActionAfterReboot : ContinueConfiguration
AgentId : 4B402719-D940-11E9-953E-00156D016FB7
AllowModuleOverWrite : True
CertificateID :
ConfigurationDownloadManagers : {[ConfigurationRepositoryWeb]AzureAutomationDSC}
ConfigurationID :
ConfigurationMode : ApplyAndMonitor
ConfigurationModeFrequencyMins : 15
Credential :
DebugMode : {NONE}
DownloadManagerCustomData :
DownloadManagerName :
LCMCompatibleVersions : {1.0, 2.0}
LCMState : Idle
LCMStateDetail :
LCMVersion : 2.0
StatusRetentionTimeInDays : 10
SignatureValidationPolicy : NONE
SignatureValidations : {}
MaximumDownloadSizeMB : 500
PartialConfigurations :
RebootNodeIfNeeded : False
RefreshFrequencyMins : 30
RefreshMode : Pull
ReportManagers : {[ReportServerWeb]AzureAutomationDSC}
ResourceModuleManagers : {[ResourceRepositoryWeb]AzureAutomationDSC}
PSComputerName :
When I run your command at the top of this email it works then when I do get-dscConfiguration again I get the following
ActionAfterReboot : ContinueConfiguration
AgentId : 4B402719-D640-11E9-953E-00155D016FB7
AllowModuleOverWrite : False
CertificateID :
ConfigurationDownloadManagers : {}
ConfigurationID :
ConfigurationMode : ApplyOnly
ConfigurationModeFrequencyMins : 15
Credential :
DebugMode : {ForceModuleImport}
DownloadManagerCustomData :
DownloadManagerName :
LCMCompatibleVersions : {1.0, 2.0}
LCMState : Idle
LCMStateDetail :
LCMVersion : 2.0
StatusRetentionTimeInDays : 10
SignatureValidationPolicy : NONE
SignatureValidations : {}
MaximumDownloadSizeMB : 500
PartialConfigurations :
RebootNodeIfNeeded : False
RefreshFrequencyMins : 30
RefreshMode : Push
ReportManagers : {}
ResourceModuleManagers : {}
PSComputerName :
See how all my other settings related to Azure etc have gone.
Therefore I need to know how to switch on/off the various DebugMode options in LCM without over-writing my original settings each time. Alternatively, will I have to add several more settings to the above PowerShell code (key-value pairs) relative to Azure settings, etc and if so which ones from the above, please
Thanks
Charlie
2

If you goal is to debug, then you can use Enable-DSCDebug cmdlet do that without changing LCM setting, but If the goal is to apply a subset of LCM setting, you will have to somehow get the current LCM setting and add the new setting to it and re apply.

3

Thanks for taking the time to get back to me on this one kvprasoon, much appreciated

CXMelga