Pull docker images in background, write minimal progress

Signed-off-by: Stefan Scherer <scherer_stefan@icloud.com>

scripts/docker/docker-pull-async.ps1

+function DockerPull {
+  Param ([string]$image)
+
+  Write-Host Installing $image ...
+  $j = Start-Job -ScriptBlock { docker pull $image }
+  while ( $j.JobStateInfo.state -ne "Completed" ) {
+    Write-Host $j.JobStateInfo.state
+    Start-Sleep 10
+  }
+
+  $results = Receive-Job -Job $j
+  $results
+}
+
+DockerPull microsoft/windowsservercore
+DockerPull microsoft/nanoserver

scripts/docker/install-docker.ps1

@@ -14,9 +14,3 @@ Write-Host "Fix --restart=always for reboot ..."
 & sc.exe config Docker depend= LanmanWorkstation
 
 Start-Service Docker
-
-Write-Host "Installing WindowsServerCore container image..."
-& "C:\Program Files\docker\docker.exe" pull microsoft/windowsservercore
-
-Write-Host "Installing NanoServer container image..."
-& "C:\Program Files\docker\docker.exe" pull microsoft/nanoserver

windows_2016_docker.json

@@ -142,6 +142,7 @@
       "scripts": [
         "./scripts/docker/add-docker-group.ps1",
         "./scripts/docker/install-docker.ps1",
+        "./scripts/docker/docker-pull-async.ps1",
         "./scripts/docker/open-docker-insecure-port.ps1",
         "./scripts/docker/remove-docker-key-json.ps1",
         "./scripts/docker/disable-windows-defender.ps1"

windows_2016_docker_azure.json

@@ -53,7 +53,9 @@
       "type": "powershell",
       "scripts": [
         "./scripts/docker/add-docker-group.ps1",
+        "./scripts/docker/disable-windows-defender.ps1",
         "./scripts/docker/install-docker.ps1",
+        "./scripts/docker/docker-pull-async.ps1",
         "./scripts/docker/remove-docker-key-json.ps1"
       ]
     }

windows_2016_docker_core.json

@@ -61,6 +61,7 @@
       "scripts": [
         "./scripts/docker/add-docker-group.ps1",
         "./scripts/docker/install-docker.ps1",
+        "./scripts/docker/docker-pull-async.ps1",
         "./scripts/docker/open-docker-insecure-port.ps1",
         "./scripts/docker/remove-docker-key-json.ps1",
         "./scripts/docker/disable-windows-defender.ps1"