Assign a public IP to the build machine by default

When building using packer, assign a public IP
(omit_external_ip = false) to the build machine by default. This matches
the manual build process and makes building the image simpler when
getting started.

When "omit_external_ip = true" the GCP network will require that Cloud
NAT is configured so that the build instance can fetch packages and
source code from the public internet.

Change-Id: I5abbbc72c3472ddb9ade2ecd3d9a31d67ff9a569

Author: chris-chilvers-qodea

docs/changes/changelog.md

@@ -4,6 +4,7 @@
 * Display Kernel and OS version information at end of packer build
 * Fix proxy startup script always prints "Error starting proxy"
 * Fix auto-reexporting the root of an NFS v4 server
+* Assign a public IP to the build machine by default
 
 ## Fetch Ubuntu Kernel source from launchpad
 
@@ -24,6 +25,12 @@ When exporting the root "/" of an NFS v4 server with AUTO_REEXPORT enabled; atte
 
 This is because the logic that ensures the root export always has `fsid=0` was overriding the re-export logic. The updated logic correctly applies both conditions to the export.
 
+## Assign a public IP to the build machine by default
+
+When building using packer, assign a public IP (`omit_external_ip = false`) to the build machine by default. This matches the manual build process and makes building the image simpler when getting started.
+
+When `omit_external_ip = true` the GCP network will require that Cloud NAT is configured so that the build instance can fetch packages and source code from the public internet.
+
 # v1.0.0-beta7
 
 * Fix error applying Terraform when nodes greater than 1

image/README.md

@@ -50,7 +50,7 @@ Create a packer variables file (e.g. `image.pkrvars.hcl`).
 * machine_type (string) - The machine type used to build the image. This can be increased to improve build speeds. Defaults to `"c2-standard-16"`.
 * network_project (string) - Project hosting the network when using shared VPC. Defaults to `project`.
 * subnetwork (string) - The subnetwork the compute instance will use. Defaults to `"default"`.
-* omit_external_ip (bool) - Use a private (internal) IP only. Defaults to `true`.
+* omit_external_ip (bool) - Use a private (internal) IP only. Defaults to `false`.
   * The subnetwork will require a NAT router in the region.
   * IAP tunnelling (default) or a VPN connection to the VPC network is required.
 * image_name (string) - The unique name of the resulting image. Defaults to `"{image_family}-{timestamp}"`.

image/variables.pkr.hcl

@@ -39,7 +39,7 @@ variable "subnetwork" {
 
 variable "omit_external_ip" {
   type    = bool
-  default = true
+  default = false
 }
 
 variable "image_name" {