feat(logs) onboard logs service

[cgoetz-inovex]

• add resource with examples
• add data source with examples
• add acceptance tests

Description

relates to STACKITTPR-448

Checklist

• Issue was linked above
• Code format was applied: make fmt
• Examples were added / adjusted (see examples/ directory)
• Docs are up-to-date: make generate-docs (will be checked by CI)
• Unit tests got implemented or updated
• Acceptance tests got implemented or updated (see e.g. here)
• Unit tests are passing: make test (will be checked by CI)
• No linter issues: make lint (will be checked by CI)

[marceljk]

When I run the following terraform config, the read of the data source fails

resource "stackit_logs_instance" "example" {
  display_name = "mj-test"
  project_id = var.project_id
  retention_days = 1
}

data "stackit_logs_instance" "example" {
  project_id = var.project_id
  instance_id = stackit_logs_instance.example.instance_id
}

╷
│ Error: Provider produced null object
│ 
│ Provider "provider[\"registry.terraform.io/stackitcloud/stackit\"]" produced a null value for data.stackit_logs_instance.example.
│ 
│ This is a bug in the provider, which should be reported in the provider's own issue tracker.
╵

[cgoetz-inovex]

When I run the following terraform config, the read of the data source fails

resource "stackit_logs_instance" "example" {
  display_name = "mj-test"
  project_id = var.project_id
  retention_days = 1
}

data "stackit_logs_instance" "example" {
  project_id = var.project_id
  instance_id = stackit_logs_instance.example.instance_id
}

╷
│ Error: Provider produced null object
│ 
│ Provider "provider[\"registry.terraform.io/stackitcloud/stackit\"]" produced a null value for data.stackit_logs_instance.example.
│ 
│ This is a bug in the provider, which should be reported in the provider's own issue tracker.
╵

thanks, fixed

[github-actions]

Merging this branch changes the coverage (2 decrease, 2 increase)

Impacted Packages	Coverage Δ	🤖
github.com/stackitcloud/terraform-provider-stackit/stackit	1.52% (-0.02%)	👎
github.com/stackitcloud/terraform-provider-stackit/stackit/internal/core	21.62% (ø)
github.com/stackitcloud/terraform-provider-stackit/stackit/internal/services/logs	0.00% (ø)
github.com/stackitcloud/terraform-provider-stackit/stackit/internal/services/logs/instance	19.76% (+19.76%)	🎉
github.com/stackitcloud/terraform-provider-stackit/stackit/internal/services/logs/utils	77.78% (+77.78%)	🌟
github.com/stackitcloud/terraform-provider-stackit/stackit/internal/testutil	6.57% (-0.15%)	👎

---

Coverage by file

Changed files (no unit tests)

Changed File	Coverage Δ	Total	Covered	Missed	🤖
github.com/stackitcloud/terraform-provider-stackit/stackit/internal/core/core.go	21.62% (ø)	37	8	29
github.com/stackitcloud/terraform-provider-stackit/stackit/internal/services/logs/instance/datasource.go	0.00% (ø)	43 (+43)	0	43 (+43)
github.com/stackitcloud/terraform-provider-stackit/stackit/internal/services/logs/instance/resource.go	23.81% (+23.81%)	210 (+210)	50 (+50)	160 (+160)	🌟
github.com/stackitcloud/terraform-provider-stackit/stackit/internal/services/logs/utils/utils.go	77.78% (+77.78%)	9 (+9)	7 (+7)	2 (+2)	🌟
github.com/stackitcloud/terraform-provider-stackit/stackit/internal/testutil/testutil.go	6.57% (-0.15%)	137 (+3)	9	128 (+3)	👎
github.com/stackitcloud/terraform-provider-stackit/stackit/provider.go	1.52% (-0.02%)	132 (+2)	2	130 (+2)	👎

Please note that the "Total", "Covered", and "Missed" counts above refer to code statements instead of lines of code. The value in brackets refers to the test coverage of that file in the old version of the code.

Changed unit test files

• github.com/stackitcloud/terraform-provider-stackit/stackit/internal/services/logs/instance/resource_test.go
• github.com/stackitcloud/terraform-provider-stackit/stackit/internal/services/logs/logs_acc_test.go
• github.com/stackitcloud/terraform-provider-stackit/stackit/internal/services/logs/utils/utils_test.go