During an instance shut-down network interfaces may be detached during the `READ` method of a Terraform run.
This protects the case where a network interface was detached, and is now `nil` at the time of the Terraform run, fixing nil pointer dereferences.
This commit catches an error when the instance is parsing and building
its network list. This can happen when a cloud provider responds with
a non-JSON response for the list of networks.
Previously lightsail was limited to `us-east-1` only. This restriction has now been lifted to new regions.
```
$ make testacc TEST=./builtin/providers/aws TESTARGS='-run=TestAccAWSLightsailInstance_euRegion'
==> Checking that code complies with gofmt requirements...
go generate $(go list ./... | grep -v /terraform/vendor/)
2017/05/19 16:40:48 Generated command/internal_plugin_list.go
TF_ACC=1 go test ./builtin/providers/aws -v -run=TestAccAWSLightsailInstance_euRegion -timeout 120m
=== RUN TestAccAWSLightsailInstance_euRegion
--- PASS: TestAccAWSLightsailInstance_euRegion (45.31s)
PASS
ok github.com/hashicorp/terraform/builtin/providers/aws 45.319s
```
Fixes: #14668
The tests did pass, but that was because they only tested part of the changes. By using the `schema.TestResourceDataRaw` function the schema and config are better tested and so they pointed out a problem with the schema of the Chef provisioner.
The `Elem` fields did not have a `*schema.Schema` but a `schema.Schema` and in an `Elem` schema only the `Type` field may (and must) be set. Any other fields like `Optional` are not allowed here.
Next to fixing that problem I also did a little refactoring and cleaning up. Mainly making the `ProvisionerS` private (`provisioner`) and removing the deprecated fields.
1. Migrate `chef` provisioner to `schema.Provisioner`:
* `chef.Provisioner` structure was renamed to `ProvisionerS`and now it's decoded from `schema.ResourceData` instead of `terraform.ResourceConfig` using simple copy-paste-based solution;
* Added simple schema without any validation yet.
2. Support `ValidateFunc` validate function : implemented in `file` and `chef` provisioners.