add example

examples/azure/debian-chroot.json

@@ -0,0 +1,26 @@
+{
+  "variables": {
+    "client_id": "{{env `ARM_CLIENT_ID`}}",
+    "client_secret": "{{env `ARM_CLIENT_SECRET`}}",
+    "subscription_id": "{{env `ARM_SUBSCRIPTION_ID`}}"
+  },
+  "builders": [{
+    "type": "azure-chroot",
+
+    "client_id": "{{user `client_id`}}",
+    "client_secret": "{{user `client_secret`}}",
+    "subscription_id": "{{user `subscription_id`}}",
+    
+    "image_resource_id": "/subscriptions/{{user `subscription_id`}}/resourceGroups/{{user `resource_group`}}/providers/Microsoft.Compute/images/MyDebianOSImage-{{timestamp}}",
+
+    "source": "credativ:Debian:9:latest"
+  }],
+  "provisioners": [{
+    "inline": [
+      "apt-get update",
+      "apt-get upgrade -y"
+    ],
+    "inline_shebang": "/bin/sh -x",
+    "type": "shell"
+  }]
+}

website/source/docs/builders/azure-chroot.html.md.erb

@@ -101,3 +101,40 @@ mounts `/prod` and `/dev`:
 
 -   The mount directory.
 
+## Example
+Here is an example that creates a Debian image with updated packages. Specify
+all environment variables (`ARM_CLIENT_ID`, `ARM_CLIENT_SECRET`, 
+`ARM_SUBSCRIPTION_ID`) to use a service principal, specify only `ARM_SUBSCRIPTION_ID`
+to use interactive login or leave them empty to use the system-assigned identity
+of the VM you run Packer on.
+The identity you choose should have permission to create disks and images and also
+to update your VM.
+
+``` json
+{
+  "variables": {
+    "client_id": "{{env `ARM_CLIENT_ID`}}",
+    "client_secret": "{{env `ARM_CLIENT_SECRET`}}",
+    "subscription_id": "{{env `ARM_SUBSCRIPTION_ID`}}"
+  },
+  "builders": [{
+    "type": "azure-chroot",
+
+    "client_id": "{{user `client_id`}}",
+    "client_secret": "{{user `client_secret`}}",
+    "subscription_id": "{{user `subscription_id`}}",
+    
+    "image_resource_id": "/subscriptions/{{user `subscription_id`}}/resourceGroups/{{user `resource_group`}}/providers/Microsoft.Compute/images/MyDebianOSImage-{{timestamp}}",
+
+    "source": "credativ:Debian:9:latest"
+  }],
+  "provisioners": [{
+    "inline": [
+      "apt-get update",
+      "apt-get upgrade -y"
+    ],
+    "inline_shebang": "/bin/sh -x",
+    "type": "shell"
+  }]
+}
+```