This is an iteration on the great work done by @dalehamel in PRs #2095
and #2109.
The core team went back and forth on how to best model Spot Instance
Requests, requesting and then rejecting a separate-resource
implementation in #2109.
After more internal discussion, we landed once again on a separate
resource to model Spot Instance Requests. Out of respect for
@dalehamel's already-significant donated time, with this I'm attempting
to pick up the work to take this across the finish line.
Important architectural decisions represented here:
* Spot Instance Requests are always of type "persistent", to properly
match Terraform's declarative model.
* The spot_instance_request resource exports several attributes that
are expected to be constantly changing as the spot market changes:
spot_bid_status, spot_request_state, and instance_id. Creating
additional resource dependencies based on these attributes is not
recommended, as Terraform diffs will be continually generated to keep
up with the live changes.
* When a Spot Instance Request is deleted/canceled, an attempt is made
to terminate the last-known attached spot instance. Race conditions
dictate that this attempt cannot guarantee that the associated spot
instance is terminated immediately.
Implementation notes:
* This version of aws_spot_instance_request borrows a lot of common
code from aws_instance.
* In order to facilitate borrowing, we introduce `awsInstanceOpts`, an
internal representation of instance details that's meant to be shared
between resources. The goal here would be to refactor ASG Launch
Configurations to use the same struct.
* The new aws_spot_instance_request acc. test is passing.
* All aws_instance acc. tests remain passing.
When a user tried to create an `aws_network_interface` resource without specifying the `private_ips` or `security_groups` attributes the API call to AWS would fail with a 500 HTTP error. Length checks have been put in place for both of these attributes before they are added to the `ec2.CreateNetworkInterfaceInput` struct.
Documentation was also added for the `aws_network_interface` resource.
While cidr_block is required for static route creation, there are
apparently cases (involving some combination of VPNs, Customer Gateways,
and automatic route propogation) where the cidr_block can come back nil.
This means we cannot assume it's there in the set hash calculation.
* upstream/master: (21 commits)
fix typo
fix typo, use awslabs/aws-sdk-go
Update CHANGELOG.md
More internal links in template documentation.
providers/aws: Requires ttl and records attributes if there isn't an ALIAS block.
Condense switch fallthroughs into expr lists
Fix docs for aws_route53_record params
Update CHANGELOG.md
provider/aws: Add IAM Server Certificate resource
aws_db_instance docs updated per #2070
providers/aws: Adds link to AWS docs about RDS parameters.
Downgrade middleman to 3.3.12 as 3.3.13 does not exist
providers/aws: Clarifies db_security_group usage.
"More more" no more!
Indentation issue
Export ARN in SQS queue and SNS topic / subscription; updated tests for new AWS SDK errors; updated documentation.
Changed Required: false to Optional: true in the SNS topic schema
Initial SNS support
correct resource name in example
added attributes reference section for AWS_EBS_VOLUME
...
