[Enhancement] aws_codebuild_fleet: Support custom instance type in the fleet

[tabito-hara]

Rollback Plan

If a change needs to be reverted, we will publish an updated version of the library.

Changes to Security Controls

Are there any changes to security controls (access controls, encryption, logging) in this pull request? If so, explain.

Description

• Added the instance_type argument to the compute_configuration block of the aws_codebuild_fleet resource, as well as to the aws_codebuild_fleet data source, to support custom instance types in fleets.

Relations

Closes #43384

References

https://docs.aws.amazon.com/codebuild/latest/APIReference/API_CreateFleet.html

Output from Acceptance Testing

$ make testacc TESTS=TestAccCodeBuildFleet_ PKG=codebuild               
make: Verifying source code with gofmt...
==> Checking that code complies with gofmt requirements...
TF_ACC=1 go1.24.5 test ./internal/service/codebuild/... -v -count 1 -parallel 20 -run='TestAccCodeBuildFleet_'  -timeout 360m -vet=off
2025/07/19 00:30:39 Creating Terraform AWS Provider (SDKv2-style)...
2025/07/19 00:30:39 Initializing Terraform AWS Provider (SDKv2-style)...
=== RUN   TestAccCodeBuildFleet_Identity_Basic
=== PAUSE TestAccCodeBuildFleet_Identity_Basic
=== RUN   TestAccCodeBuildFleet_Identity_RegionOverride
=== PAUSE TestAccCodeBuildFleet_Identity_RegionOverride
=== RUN   TestAccCodeBuildFleet_Identity_ExistingResource
=== PAUSE TestAccCodeBuildFleet_Identity_ExistingResource
=== RUN   TestAccCodeBuildFleet_basic
=== PAUSE TestAccCodeBuildFleet_basic
=== RUN   TestAccCodeBuildFleet_disappears
=== PAUSE TestAccCodeBuildFleet_disappears
=== RUN   TestAccCodeBuildFleet_tags
=== PAUSE TestAccCodeBuildFleet_tags
=== RUN   TestAccCodeBuildFleet_baseCapacity
=== PAUSE TestAccCodeBuildFleet_baseCapacity
=== RUN   TestAccCodeBuildFleet_computeConfiguration
=== PAUSE TestAccCodeBuildFleet_computeConfiguration
=== RUN   TestAccCodeBuildFleet_computeType
=== PAUSE TestAccCodeBuildFleet_computeType
=== RUN   TestAccCodeBuildFleet_environmentType
=== PAUSE TestAccCodeBuildFleet_environmentType
=== RUN   TestAccCodeBuildFleet_imageId
=== PAUSE TestAccCodeBuildFleet_imageId
=== RUN   TestAccCodeBuildFleet_scalingConfiguration
=== PAUSE TestAccCodeBuildFleet_scalingConfiguration
=== RUN   TestAccCodeBuildFleet_vpcConfig
=== PAUSE TestAccCodeBuildFleet_vpcConfig
=== RUN   TestAccCodeBuildFleet_customInstanceType
=== PAUSE TestAccCodeBuildFleet_customInstanceType
=== CONT  TestAccCodeBuildFleet_Identity_Basic
=== CONT  TestAccCodeBuildFleet_computeConfiguration
=== CONT  TestAccCodeBuildFleet_disappears
=== CONT  TestAccCodeBuildFleet_Identity_ExistingResource
=== CONT  TestAccCodeBuildFleet_basic
=== CONT  TestAccCodeBuildFleet_baseCapacity
=== CONT  TestAccCodeBuildFleet_tags
=== CONT  TestAccCodeBuildFleet_Identity_RegionOverride
=== CONT  TestAccCodeBuildFleet_scalingConfiguration
=== CONT  TestAccCodeBuildFleet_customInstanceType
=== CONT  TestAccCodeBuildFleet_vpcConfig
=== CONT  TestAccCodeBuildFleet_environmentType
=== CONT  TestAccCodeBuildFleet_imageId
=== CONT  TestAccCodeBuildFleet_computeType
--- PASS: TestAccCodeBuildFleet_basic (72.85s)
--- PASS: TestAccCodeBuildFleet_imageId (74.17s)
--- PASS: TestAccCodeBuildFleet_Identity_Basic (83.46s)
--- PASS: TestAccCodeBuildFleet_Identity_RegionOverride (93.28s)
--- PASS: TestAccCodeBuildFleet_disappears (93.44s)
--- PASS: TestAccCodeBuildFleet_baseCapacity (99.45s)
--- PASS: TestAccCodeBuildFleet_computeType (99.45s)
--- PASS: TestAccCodeBuildFleet_customInstanceType (99.68s)
--- PASS: TestAccCodeBuildFleet_computeConfiguration (114.58s)
--- PASS: TestAccCodeBuildFleet_environmentType (117.57s)
--- PASS: TestAccCodeBuildFleet_tags (135.14s)
--- PASS: TestAccCodeBuildFleet_vpcConfig (138.59s)
--- PASS: TestAccCodeBuildFleet_scalingConfiguration (141.31s)
--- PASS: TestAccCodeBuildFleet_Identity_ExistingResource (149.62s)
PASS
ok      github.com/hashicorp/terraform-provider-aws/internal/service/codebuild  153.771s

$ make testacc TESTS=TestAccCodeBuildFleetDataSource_ PKG=codebuild               
make: Verifying source code with gofmt...
==> Checking that code complies with gofmt requirements...
TF_ACC=1 go1.24.5 test ./internal/service/codebuild/... -v -count 1 -parallel 20 -run='TestAccCodeBuildFleetDataSource_'  -timeout 360m -vet=off
2025/07/19 00:36:00 Creating Terraform AWS Provider (SDKv2-style)...
2025/07/19 00:36:00 Initializing Terraform AWS Provider (SDKv2-style)...
=== RUN   TestAccCodeBuildFleetDataSource_basic
=== PAUSE TestAccCodeBuildFleetDataSource_basic
=== RUN   TestAccCodeBuildFleetDataSource_customInstanceType
=== PAUSE TestAccCodeBuildFleetDataSource_customInstanceType
=== CONT  TestAccCodeBuildFleetDataSource_basic
=== CONT  TestAccCodeBuildFleetDataSource_customInstanceType
--- PASS: TestAccCodeBuildFleetDataSource_basic (49.41s)
--- PASS: TestAccCodeBuildFleetDataSource_customInstanceType (49.72s)
PASS
ok      github.com/hashicorp/terraform-provider-aws/internal/service/codebuild  53.347s

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[ewbankkit]

LGTM 🚀.

% make testacc TESTARGS='-run=TestAccCodeBuildFleet' PKG=codebuild ACCTEST_PARALLELISM=3      
make: Verifying source code with gofmt...
==> Checking that code complies with gofmt requirements...
TF_ACC=1 go1.24.5 test ./internal/service/codebuild/... -v -count 1 -parallel 3  -run=TestAccCodeBuildFleet -timeout 360m -vet=off
2025/07/29 16:55:06 Creating Terraform AWS Provider (SDKv2-style)...
2025/07/29 16:55:06 Initializing Terraform AWS Provider (SDKv2-style)...
=== RUN   TestAccCodeBuildFleetDataSource_basic
=== PAUSE TestAccCodeBuildFleetDataSource_basic
=== RUN   TestAccCodeBuildFleetDataSource_customInstanceType
=== PAUSE TestAccCodeBuildFleetDataSource_customInstanceType
=== RUN   TestAccCodeBuildFleet_Identity_Basic
=== PAUSE TestAccCodeBuildFleet_Identity_Basic
=== RUN   TestAccCodeBuildFleet_Identity_RegionOverride
=== PAUSE TestAccCodeBuildFleet_Identity_RegionOverride
=== RUN   TestAccCodeBuildFleet_Identity_ExistingResource
=== PAUSE TestAccCodeBuildFleet_Identity_ExistingResource
=== RUN   TestAccCodeBuildFleet_basic
=== PAUSE TestAccCodeBuildFleet_basic
=== RUN   TestAccCodeBuildFleet_disappears
=== PAUSE TestAccCodeBuildFleet_disappears
=== RUN   TestAccCodeBuildFleet_tags
=== PAUSE TestAccCodeBuildFleet_tags
=== RUN   TestAccCodeBuildFleet_baseCapacity
=== PAUSE TestAccCodeBuildFleet_baseCapacity
=== RUN   TestAccCodeBuildFleet_computeConfiguration
=== PAUSE TestAccCodeBuildFleet_computeConfiguration
=== RUN   TestAccCodeBuildFleet_computeType
=== PAUSE TestAccCodeBuildFleet_computeType
=== RUN   TestAccCodeBuildFleet_environmentType
=== PAUSE TestAccCodeBuildFleet_environmentType
=== RUN   TestAccCodeBuildFleet_imageId
=== PAUSE TestAccCodeBuildFleet_imageId
=== RUN   TestAccCodeBuildFleet_scalingConfiguration
=== PAUSE TestAccCodeBuildFleet_scalingConfiguration
=== RUN   TestAccCodeBuildFleet_vpcConfig
=== PAUSE TestAccCodeBuildFleet_vpcConfig
=== RUN   TestAccCodeBuildFleet_customInstanceType
=== PAUSE TestAccCodeBuildFleet_customInstanceType
=== CONT  TestAccCodeBuildFleetDataSource_basic
=== CONT  TestAccCodeBuildFleet_baseCapacity
=== CONT  TestAccCodeBuildFleet_Identity_ExistingResource
--- PASS: TestAccCodeBuildFleetDataSource_basic (42.99s)
=== CONT  TestAccCodeBuildFleet_tags
--- PASS: TestAccCodeBuildFleet_baseCapacity (66.02s)
=== CONT  TestAccCodeBuildFleet_disappears
=== CONT  TestAccCodeBuildFleet_basic
--- PASS: TestAccCodeBuildFleet_Identity_ExistingResource (111.52s)
--- PASS: TestAccCodeBuildFleet_disappears (56.89s)
=== CONT  TestAccCodeBuildFleet_Identity_Basic
--- PASS: TestAccCodeBuildFleet_tags (87.86s)
=== CONT  TestAccCodeBuildFleet_Identity_RegionOverride
--- PASS: TestAccCodeBuildFleet_basic (43.65s)
=== CONT  TestAccCodeBuildFleet_imageId
--- PASS: TestAccCodeBuildFleet_Identity_Basic (50.78s)
=== CONT  TestAccCodeBuildFleet_customInstanceType
--- PASS: TestAccCodeBuildFleet_Identity_RegionOverride (54.38s)
=== CONT  TestAccCodeBuildFleet_vpcConfig
--- PASS: TestAccCodeBuildFleet_imageId (43.75s)
=== CONT  TestAccCodeBuildFleet_scalingConfiguration
--- PASS: TestAccCodeBuildFleet_customInstanceType (66.84s)
=== CONT  TestAccCodeBuildFleetDataSource_customInstanceType
--- PASS: TestAccCodeBuildFleetDataSource_customInstanceType (41.48s)
=== CONT  TestAccCodeBuildFleet_computeType
--- PASS: TestAccCodeBuildFleet_scalingConfiguration (90.54s)
=== CONT  TestAccCodeBuildFleet_environmentType
--- PASS: TestAccCodeBuildFleet_vpcConfig (125.14s)
=== CONT  TestAccCodeBuildFleet_computeConfiguration
--- PASS: TestAccCodeBuildFleet_computeType (64.81s)
--- PASS: TestAccCodeBuildFleet_environmentType (64.36s)
--- PASS: TestAccCodeBuildFleet_computeConfiguration (66.91s)
PASS
ok  	github.com/hashicorp/terraform-provider-aws/internal/service/codebuild	382.400s

[ewbankkit]

@tabito-hara Thanks for the contribution 🎉 👏.

[github-actions]

Warning

This Issue has been closed, meaning that any additional comments are much easier for the maintainers to miss. Please assume that the maintainers will not see them.

Ongoing conversations amongst community members are welcome, however, the issue will be locked after 30 days. Moving conversations to another venue, such as the AWS Provider forum, is recommended. If you have additional concerns, please open a new issue, referencing this one where needed.

[github-actions]

This functionality has been released in v6.7.0 of the Terraform AWS Provider. Please see the Terraform documentation on provider versioning or reach out if you need any assistance upgrading.

For further feature requests or bug reports with this functionality, please create a new GitHub issue following the template. Thank you!

[github-actions]

I'm going to lock this pull request because it has been closed for 30 days ⏳. This helps our maintainers find and focus on the active issues.
If you have found a problem that seems related to this change, please open a new issue and complete the issue template so we can capture all the details necessary to investigate further.