MariaDB.DSC.psm1
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enum Ensure { Absent Present } <# This resource manages the installation/removal of MariaDB. #> [DscResource()] class MariaDB { <# The service name of the Maria DB instance that is expected to be installed. #> [DscProperty(Key)] [string]$ServiceName <# Indicates if the settings should be present or absent on the system. For present, the resource ensures the file pointed to by $Path exists. For absent, it ensures the file point to by $Path does not exist. #> [DscProperty(Mandatory)] [Ensure] $Ensure <# Defines the default Maria DB root user password #> [DscProperty(Mandatory)] [System.Management.Automation.PSCredential] $RootPwd <# Full file path to the Maria DB Installer .MSI #> [DscProperty(Mandatory)] [string] $InstallerPath <# This method is equivalent of the Set-TargetResource script function. It sets the resource to the desired state. #> [void] Set() { $serviceExists = $this.TestServiceExists($this.ServiceName) if ($this.ensure -eq [Ensure]::Present) { if (-not $serviceExists) { Write-Verbose "Installing Maria DB with Service Name $($this.ServiceName)" $ArgumentList = "PASSWORD=$($this.RootPwd.GetNetworkCredential().Password) UTF8=true SERVICENAME=$($this.ServiceName) /qn" Start-Process -FilePath $this.InstallerPath -ArgumentList $ArgumentList -Wait -Passthru -ErrorAction Stop } else { # Ensure set to present but service already exists Write-Verbose "Ensure set to $($this.ensure) but service $($this.ServiceName) already exists - no changes performed" } } else { if ($serviceExists) { Write-Verbose -Message 'Uninstalling Maria DB' $ArgumentList = " /x $($this.InstallerPath) /q" Start-Process -FilePath 'msiexec' -ArgumentList $ArgumentList -Wait -PassThru -ErrorAction Stop } else { Write-Verbose "Ensure set to $($this.ensure) but service $($this.ServiceName) was not found - no changes performed" } } } <# This method is equivalent of the Test-TargetResource script function. It should return True or False, showing whether the resource is in a desired state. #> [bool] Test() { $present = $this.TestServiceExists($this.ServiceName) if ($this.Ensure -eq [Ensure]::Present) { return $present } else { return -not $present } } <# This method is equivalent of the Get-TargetResource script function. The implementation should use the keys to find appropriate resources. This method returns an instance of this class with the updated key properties. #> [MariaDB] Get() { $present = $this.TestServiceExists($this.ServiceName) if ($present) { $Service = Get-Service $this.ServiceName $this.Status = $Service.Status $this.StartType = $Service.StartType $this.Ensure = [Ensure]::Present } else { $this.Ensure = [Ensure]::Absent } return $this } <# Helper method to check if a service exists #> [bool] TestServiceExists([string] $ServiceName) { $present = $true $item = Get-Service $ServiceName -ErrorAction 'Ignore' if ($null -eq $item) { $present = $false } return $present } } |