Adds `enable_secure_boot`, `enable_vtpm` and `enable_integrity_monitoring`
config options to enable building of custom Shielded GCP Compute images.
Feedback on this is more than welcome as this is my first attempt in
contributing to anything Packer related.
Packer is great for us to build custom images on top of GCP but we would
like to enhance that to support Shielded VM images. This will allow us
to have more secure and trusted images which our team(s) will be using.
It is simply the best/simplest solution and trying to prevent users from passing and integer here would be like opening a can of worms. Because:
* we cannot make mapstructure validate our duration string ( with an UnmarshalJSON func etc.)
* we cannot make mapstructure spit a string instead of a duration and packer will decode-encode-decode config.
* the hcl2 generated code asks for a string, so this will be enforced by default.
Before this commit it was possible to set a duration using an integer or a float. Go's time.Duration is an int64 internally an mapstructure will take advantage of this and load the number as a int64 but `1` means one ns which is unexpected/confusing. To avoid confusion and enforce readability this forces users to pass a string with a unit for a duration; ex "56s".
The ability to use a service account other than the default was
introduced in #5928. This change adds to that by introducing the
'disable_default_service_account' config option. If true - and
'service_account_email' is not set - Packer will create a GCE VM
with no service account.
This commit allows user to specify the service account they want
to associate with the virtual machine provisionned by setting
the service_account_email field in the config.
It allows to manage permissions of the instantiated VM properly,
using a service account that can be tied up to IAM roles and
permissions.
Run now takes a context as well as a statebag. We'll assign the context
to the blank identifier to prevent namespace collisions. We'll let the
step authors opt-in to using the context.
`find . -iname "step_*.go" -exec gsed -i'' 's/func \(.*\)Run(/func \1Run(_ context.Context, /' {} \;`