Desired State Configuration (DSC)
PowerShell Desired State Configuration (DSC) is a feature of PowerShell that allows you to declare the desired state of a system, and then automatically configure and maintain that system to match that state. DSC uses a declarative syntax to describe the state of a system, and can be used to configure everything from the operating system to specific applications and services. Here's an example:
# Define a configuration block that describes the desired state of the system
Configuration MyConfig {
Node "localhost" {
WindowsFeature IIS {
Ensure = "Present"
Name = "Web-Server"
}
Service "W3SVC" {
Ensure = "Running"
Name = "W3SVC"
}
}
}
# Apply the configuration to the system
MyConfig -OutputPath C:\DSC
Start-DscConfiguration -Path C:\DSC -Wait -Verbose
In this example, we define a configuration block that describes the desired state of the local system. The configuration block specifies that the Web Server role should be installed (if it isn't already), and that the World Wide Web Publishing Service (W3SVC) should be running.
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