This is a breaking change to the ResourceProvider interface that adds the
new operations relating to data sources.
DataSources, ValidateDataSource, ReadDataDiff and ReadDataApply are the
data source equivalents of Resources, Validate, Diff and Apply (respectively)
for managed resources.
The diff/apply model seems at first glance a rather strange workflow for
read-only resources, but implementing data resources in this way allows them
to fit cleanly into the standard plan/apply lifecycle in cases where the
configuration contains computed arguments and thus the read must be deferred
until apply time.
Along with breaking the interface, we also fix up the plugin client/server
and helper/schema implementations of it, which are all of the callers
used when provider plugins use helper/schema. This would be a breaking
change for any provider plugin that directly implements the provider
interface, but no known plugins do this and it is not recommended.
At the helper/schema layer the implementer sees ReadDataApply as a "Read",
as opposed to "Create" or "Update" as in the managed resource Apply
implementation. The planning mechanics are handled entirely within
helper/schema, so that complexity is hidden from the provider implementation
itself.
This allows ${data.TYPE.NAME.FIELD} interpolation syntax at the
configuration level, though since there is no special handling of them
in the core package this currently just acts as an alias for
${TYPE.NAME.FIELD}.
This allows the config loader to read "data" blocks from the config and
turn them into DataSource objects.
This just reads the data from the config file. It doesn't validate the
data nor do anything useful with it.
Previously resources were assumed to always support the full set of
create, read, update and delete operations, and Terraform's resource
management lifecycle.
Data sources introduce a new kind of resource that only supports the
"read" operation. To support this, a new "Mode" field is added to
the Resource concept within the config layer, which can be set to
ManagedResourceMode (to indicate the only mode previously possible) or
DataResourceMode (to indicate that only "read" is supported).
To support both managed and data resources in the tests, the
stringification of resources in config_string.go is adjusted slightly
to use the Id() method rather than the unusual type[name] serialization
from before, causing a simple mechanical adjustment to the loader tests'
expected result strings.
As requested in #4822, add support for a KMS Key ID (ARN) for Db
Instance
```
make testacc TEST=./builtin/providers/aws
TESTARGS='-run=TestAccAWSDBInstance_kmsKey' 2>~/tf.log
==> Checking that code complies with gofmt requirements...
go generate $(go list ./... | grep -v /vendor/)
TF_ACC=1 go test ./builtin/providers/aws -v
-run=TestAccAWSDBInstance_kmsKey -timeout 120m
=== RUN TestAccAWSDBInstance_basic
--- PASS: TestAccAWSDBInstance_basic (587.37s)
=== RUN TestAccAWSDBInstance_kmsKey
--- PASS: TestAccAWSDBInstance_kmsKey (625.31s)
PASS
ok github.com/hashicorp/terraform/builtin/providers/aws 1212.684s
```
missing
Fixes#6625
When an SNS topic subscription was created with TF and then removed via
the AWS Console, Terraform threw an error:
```
* aws_sns_topic_subscription.testme: NotFound: Subscription does not
* exist
status code: 404, request id: a22e7ed7-3630-5a8a-b767-317ac1440e24
```
This PR will remove the topic subscription from state on a NotFound and
will then readd the subscripton
Auto-generating an Instance Template name (or just its suffix) allows the
create_before_destroy lifecycle option to function correctly on the
Instance Template resource. This in turn allows Instance Group Managers
to be updated without being destroyed.
