* [terraform/aws] Fix Terraform >=0.13 warnings
Terraform >=0.13 gives the following warning:
```
Warning: Interpolation-only expressions are deprecated
```
The fix was tested as follows:
```
rm -rf .terraform && terraform0.12.26 init && terraform0.12.26 validate
rm -rf .terraform && terraform0.13.5 init && terraform0.13.5 validate
rm -rf .terraform && terraform0.14.3 init && terraform0.14.3 validate
```
which gave no errors nor warnings.
* [terraform/openstack] Fixes for Terraform >=0.13
Terraform >=0.13 gives the following error:
```
Error: Failed to install providers
Could not find required providers, but found possible alternatives:
hashicorp/openstack -> terraform-provider-openstack/openstack
```
This patch fixes these errors.
This fix was tested as follows:
```
rm -rf .terraform && terraform0.12.26 init && terraform0.12.26 validate
rm -rf .terraform && terraform0.13.5 init && terraform0.13.5 validate
rm -rf .terraform && terraform0.14.3 init && terraform0.14.3 validate
```
which gave no errors nor warnings for Terraform 0.13.5 and Terraform
0.14.3. Unfortunately, 0.12.x gives a harmless warning, but
with 0.14.3 out the door, I guess we need to move on.
* [terraform/packet] Fixes for Terraform >=0.13
This fix was tested as follows:
```
export PACKET_AUTH_TOKEN=blah-blah
rm -rf .terraform && terraform0.12.26 init && terraform0.12.26 validate
rm -rf .terraform && terraform0.13.5 init && terraform0.13.5 validate
rm -rf .terraform && terraform0.14.3 init && terraform0.14.3 validate
```
Errors are gone, but warnings still remain. It is impossible to please
all three versions of Terraform.
* Add tests for Terraform >=0.13
* Run terraform fmt
* Add terraform fmt to .terraform-validate CI step
* Add tf-validate-aws CI step
* Revert "Add tf-validate-aws CI step"
This reverts commit e007225fac.
* Properly tag instances and subnets with `kubernetes.io/cluster/$cluster_name`
This is required by kubernetes to support multiple clusters in a single vpc/az
* Get rid of loadbalancer_apiserver_address as it is no longer needed
* Dynamically retrieve aws_bastion_ami latest reference by querying AWS rather than hard coded
* Dynamically retrieve the list of availability_zones instead of needing to have them hard coded
* Limit availability zones to first 2, using slice extrapolation function
* Replace the need for hardcoded variable "aws_cluster_ami" by the data provided by Terraform
* Move ami choosing to vars, so people don't need to edit create infrastructure if they want another vendor image (as suggested by @atoms)
* Make name of the data block agnostic of distribution, given there are more than one distribution supported
* Add documentation about other distros being supported and what to change in which location to make these changes
Rewrote AWS Terraform deployment for AWS Kargo. It supports now
multiple Availability Zones, AWS Loadbalancer for Kubernetes API,
Bastion Host, ...
For more information see README
