Create UpdateMachinePolicy.ps1

REST/PowerShell/Targets/UpdateMachinePolicy.ps1

@@ -0,0 +1,32 @@
+$ErrorActionPreference = "Stop";
+
+  # Define working variables
+  $octopusURL = "https://mysite.octopus.app"
+  $octopusAPIKey = "API-MYAPIKEY"
+  $header = @{ "X-Octopus-ApiKey" = $octopusAPIKey }
+  $spaceName = "default"
+  $machineNames = @("machine1", "machine2", "machine3")
+  $machinePolicyName = "mypolicyname"
+
+  # Get space
+  $space = (Invoke-RestMethod -Method Get -Uri "$octopusURL/api/spaces/all" -Headers $header) | Where-Object {$_.Name -eq $spaceName}
+
+  # Get all machines
+  $allMachines = Invoke-RestMethod -Method Get -Uri "$octopusURL/api/$($space.Id)/machines/all" -Headers $header
+
+  # Get specified machine policy
+  $machinePolicy = (Invoke-RestMethod -Method Get -Uri "$octopusURL/api/$($space.Id)/machinepolicies/all" -Headers $header) | Where-Object { $_.Name -eq $machinePolicyName }
+
+  # Update each machine
+  foreach ($machineName in $machineNames) {
+      $machine = $allMachines | Where-Object {$_.Name -eq $machineName}
+
+      if ($null -eq $machine) {
+          Write-Warning "Machine not found: $machineName — skipping"
+          continue
+      }
+
+      Write-Host "Updating machine policy for: $machineName"
+      $machine.MachinePolicyId = $machinePolicy.Id
+      Invoke-RestMethod -Method Put -Uri "$octopusURL/api/$($space.Id)/machines/$($machine.Id)" -Body ($machine | ConvertTo-Json -Depth 10) -Headers $header
+  }