Found as part of #15065, when there is no default VPC, Terraform will
throw a panic. This prevents that as a user should never get that
```
% make testacc TEST=./builtin/providers/aws/ TESTARGS='-run=TestAccAWSDefaultVpc_'
==> Checking that code complies with gofmt requirements...
go generate $(go list ./... | grep -v /terraform/vendor/)
2017/06/05 12:16:09 Generated command/internal_plugin_list.go
TF_ACC=1 go test ./builtin/providers/aws/ -v -run=TestAccAWSDefaultVpc_basic -timeout 120m
=== RUN TestAccAWSDefaultVpc_basic
--- PASS: TestAccAWSDefaultVpc_basic (44.65s)
PASS
ok github.com/hashicorp/terraform/builtin/providers/aws 44.669s
```
* Fix issues in Cloudwatch Log Group tag
1) Removing tags from terraform doesn’t actually get removed in AWS
2) Trying to update a tag with empty value (“”) to a non-empty value
causes terraform to loop forever
The issue was caused by a mixup of using tag values where tag name
should have used and is corrected in this patch.
This patch also removes the comparison of old and new tag values,
because AWS api takes care of updates by itself and there is no need to
perform an unnecessary UnTag API to update an existing tag value
* Updated the test cases to cover the removal and empty update scenarios
Previously `ModifyInstanceAttribute` permissions were required on creating a new instance with an unmodified `source_dest_check` attribute, as we forced the `ModifyInstanceAttribute` set on a new AWS instance.
This change only calls `ModifyInstanceAttribute` if `source_dest_check` was changed from default on a new instance, or if `source_dest_check` was modified.
```
$ make testacc TEST=./builtin/providers/aws TESTARGS="-run=TestAccAWSInstance_sourceDestCheck"
==> Checking that code complies with gofmt requirements...
go generate $(go list ./... | grep -v /terraform/vendor/)
2017/06/01 11:18:31 Generated command/internal_plugin_list.go
TF_ACC=1 go test ./builtin/providers/aws -v -run=TestAccAWSInstance_sourceDestCheck -timeout 120m
=== RUN TestAccAWSInstance_sourceDestCheck
--- PASS: TestAccAWSInstance_sourceDestCheck (172.28s)
PASS
ok github.com/hashicorp/terraform/builtin/providers/aws 172.308s
```
If more than one of the allowed targets is specified in an `aws_route`
resource, we should provide an error message that does not include
`route_table_id` as a valid target, since `route_table_id` is actually
a required argument.
Fixes a panic where specifying a nil `target_arn` for a `dead_letter_config` inside the `aws_lambda_function` resource would throw a panic.
Now, we return a nice error to the user instead of throwing a panic and stacktrace.
```
$ make testacc TEST=./builtin/providers/aws TESTARGS="-run=TestAccAWSLambdaFunction_nilDeadLetterConfig"
==> Checking that code complies with gofmt requirements...
go generate $(go list ./... | grep -v /terraform/vendor/)
2017/05/31 10:22:26 Generated command/internal_plugin_list.go
TF_ACC=1 go test ./builtin/providers/aws -v -run=TestAccAWSLambdaFunction_nilDeadLetterConfig -timeout 120m
=== RUN TestAccAWSLambdaFunction_nilDeadLetterConfig
--- PASS: TestAccAWSLambdaFunction_nilDeadLetterConfig (20.86s)
PASS
ok github.com/hashicorp/terraform/builtin/providers/aws 20.884s
```
* provider/aws: Add data source for aws_elasticache_cluster
Fixes: #11445
* provider/aws: Add acceptance tests for aws_elasticache_cluster data source
* provider/aws: Add documentation for the aws_elasticache_cluster datasource
Fixes: #14826
aws_launch_configuration ebs_block_device only had selected properties in the set hash. I removed these to allow any changes to the block device config to force a new resource
```
% make testacc TEST=./builtin/providers/aws/ TESTARGS='-run=TestAccAWSLaunchConfiguration_'
==> Checking that code complies with gofmt requirements...
go generate $(go list ./... | grep -v /terraform/vendor/)
2017/05/29 01:08:55 Generated command/internal_plugin_list.go
TF_ACC=1 go test ./builtin/providers/aws/ -v -run=TestAccAWSLaunchConfiguration_ -timeout 120m
=== RUN TestAccAWSLaunchConfiguration_importBasic
--- PASS: TestAccAWSLaunchConfiguration_importBasic (32.89s)
=== RUN TestAccAWSLaunchConfiguration_basic
--- PASS: TestAccAWSLaunchConfiguration_basic (44.34s)
=== RUN TestAccAWSLaunchConfiguration_withBlockDevices
--- PASS: TestAccAWSLaunchConfiguration_withBlockDevices (28.98s)
=== RUN TestAccAWSLaunchConfiguration_updateRootBlockDevice
--- PASS: TestAccAWSLaunchConfiguration_updateRootBlockDevice (52.23s)
=== RUN TestAccAWSLaunchConfiguration_withSpotPrice
--- PASS: TestAccAWSLaunchConfiguration_withSpotPrice (23.04s)
=== RUN TestAccAWSLaunchConfiguration_withVpcClassicLink
--- PASS: TestAccAWSLaunchConfiguration_withVpcClassicLink (62.30s)
=== RUN TestAccAWSLaunchConfiguration_withIAMProfile
--- PASS: TestAccAWSLaunchConfiguration_withIAMProfile (51.62s)
=== RUN TestAccAWSLaunchConfiguration_withEncryption
--- PASS: TestAccAWSLaunchConfiguration_withEncryption (27.91s)
=== RUN TestAccAWSLaunchConfiguration_updateEbsBlockDevices
--- PASS: TestAccAWSLaunchConfiguration_updateEbsBlockDevices (62.98s)
PASS
ok github.com/hashicorp/terraform/builtin/providers/aws 386.308s
```
Fixes: #10581
When a cluster was originally created, you could not enable snapshotting
on it. An error message like this was found:
```
* aws_elasticache_replication_group.bar: Error updating Elasticache replication group: InvalidParameterCombination: Must specify both SnapshotRetentionLimit and SnapshottingClusterId to turn on snapshots
status code: 400, request id: 98d2ea4e-3fb1-11e7-b077-5967719aeab4
```
There is no guidance from AWS on which is the preferred Cluster in the RG to use for snapshotting. Therefore, I decided to set it to be the first cluster. We can now enable snapshotting
```
% make testacc TEST=./builtin/providers/aws/ TESTARGS='-run=TestAccAWSElasticacheReplicationGroup_enableSnapshotting'
==> Checking that code complies with gofmt requirements...
go generate $(go list ./... | grep -v /terraform/vendor/)
2017/05/23 15:02:21 Generated command/internal_plugin_list.go
TF_ACC=1 go test ./builtin/providers/aws/ -v -run=TestAccAWSElasticacheReplicationGroup_enableSnapshotting -timeout 120m
=== RUN TestAccAWSElasticacheReplicationGroup_enableSnapshotting
--- PASS: TestAccAWSElasticacheReplicationGroup_enableSnapshotting (1261.47s)
PASS
ok github.com/hashicorp/terraform/builtin/providers/aws 1261.496s
```
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.
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
Radek Simko