{"id":50935227,"url":"https://github.com/optiflowic/kumolo","last_synced_at":"2026-06-17T08:02:58.528Z","repository":{"id":359906157,"uuid":"1194730462","full_name":"optiflowic/kumolo","owner":"optiflowic","description":"A high-fidelity AWS emulator for local development and testing","archived":false,"fork":false,"pushed_at":"2026-06-16T13:58:48.000Z","size":1643,"stargazers_count":0,"open_issues_count":16,"forks_count":0,"subscribers_count":0,"default_branch":"main","last_synced_at":"2026-06-16T14:16:04.054Z","etag":null,"topics":["aws","aws-emulator","developer-tools","dynamodb","golang","local-development","s3","sts","testing"],"latest_commit_sha":null,"homepage":"https://optiflowic.github.io/kumolo-docs/","language":"Go","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"mit","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/optiflowic.png","metadata":{"files":{"readme":"README.md","changelog":"CHANGELOG.md","contributing":".github/CONTRIBUTING.md","funding":null,"license":"LICENSE","code_of_conduct":".github/CODE_OF_CONDUCT.md","threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":".github/SECURITY.md","support":null,"governance":null,"roadmap":null,"authors":null,"dei":null,"publiccode":null,"codemeta":null,"zenodo":null,"notice":null,"maintainers":null,"copyright":null,"agents":null,"dco":null,"cla":null}},"created_at":"2026-03-28T18:31:10.000Z","updated_at":"2026-06-16T14:04:56.000Z","dependencies_parsed_at":null,"dependency_job_id":null,"html_url":"https://github.com/optiflowic/kumolo","commit_stats":null,"previous_names":["optiflowic/kumolo"],"tags_count":5,"template":false,"template_full_name":null,"purl":"pkg:github/optiflowic/kumolo","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/optiflowic%2Fkumolo","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/optiflowic%2Fkumolo/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/optiflowic%2Fkumolo/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/optiflowic%2Fkumolo/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/optiflowic","download_url":"https://codeload.github.com/optiflowic/kumolo/tar.gz/refs/heads/main","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/optiflowic%2Fkumolo/sbom","scorecard":null,"host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":286080680,"owners_count":34439296,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2026-05-26T15:22:16.424Z","status":"online","status_checked_at":"2026-06-17T02:00:05.408Z","response_time":127,"last_error":null,"robots_txt_status":"success","robots_txt_updated_at":"2025-07-24T06:49:26.215Z","robots_txt_url":"https://github.com/robots.txt","online":true,"can_crawl_api":true,"host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["aws","aws-emulator","developer-tools","dynamodb","golang","local-development","s3","sts","testing"],"created_at":"2026-06-17T08:02:58.386Z","updated_at":"2026-06-17T08:02:58.523Z","avatar_url":"https://github.com/optiflowic.png","language":"Go","funding_links":[],"categories":[],"sub_categories":[],"readme":"\u003cp align=\"center\"\u003e\n  \u003cimg src=\"assets/logo.png\" alt=\"kumolo\" width=\"280\" /\u003e\n\u003c/p\u003e\n\n# kumolo\n\n[![Go Report Card](https://goreportcard.com/badge/github.com/optiflowic/kumolo)](https://goreportcard.com/report/github.com/optiflowic/kumolo)\n[![Latest Release](https://img.shields.io/github/v/release/optiflowic/kumolo?sort=semver)](https://github.com/optiflowic/kumolo/releases)\n[![CI](https://github.com/optiflowic/kumolo/actions/workflows/ci.yaml/badge.svg)](https://github.com/optiflowic/kumolo/actions/workflows/ci.yaml)\n[![Release](https://github.com/optiflowic/kumolo/actions/workflows/release.yaml/badge.svg)](https://github.com/optiflowic/kumolo/actions/workflows/release.yaml)\n[![Docker](https://github.com/optiflowic/kumolo/actions/workflows/docker-publish.yaml/badge.svg)](https://github.com/optiflowic/kumolo/actions/workflows/docker-publish.yaml)\n[![License: MIT](https://img.shields.io/badge/license-MIT-green.svg)](./LICENSE)\n\nA high-fidelity AWS emulator for local development and testing.\n\n\u003e **Goal: if it works on kumolo, it works on real AWS — and vice versa.**\n\nkumolo runs as a standalone server that accepts standard AWS SDK v2 requests. No mocking, no stubs — it behaves like real AWS.\n\n## Quick Start\n\n### Docker\n\n```bash\ndocker run -p 5566:5566 ghcr.io/optiflowic/kumolo:latest\n```\n\nOr with persistent storage:\n\n```bash\ndocker run -p 5566:5566 -v $(pwd)/data:/data ghcr.io/optiflowic/kumolo:latest\n```\n\n### Docker Compose\n\n```yaml\nservices:\n  kumolo:\n    image: ghcr.io/optiflowic/kumolo:latest\n    ports:\n      - \"5566:5566\"\n    volumes:\n      - ./data:/data\n```\n\n### Binary\n\nDownload the latest binary from [GitHub Releases](https://github.com/optiflowic/kumolo/releases) and run:\n\n```bash\nkumolo\n```\n\n## AWS SDK v2 Usage\n\nPoint your AWS SDK at `http://localhost:5566` — no other changes needed.\n\n```go\nimport (\n    \"context\"\n\n    \"github.com/aws/aws-sdk-go-v2/aws\"\n    \"github.com/aws/aws-sdk-go-v2/config\"\n    \"github.com/aws/aws-sdk-go-v2/credentials\"\n    \"github.com/aws/aws-sdk-go-v2/service/s3\"\n)\n\ncfg, err := config.LoadDefaultConfig(context.Background(),\n    config.WithRegion(\"us-east-1\"),\n    config.WithCredentialsProvider(credentials.NewStaticCredentialsProvider(\"test\", \"test\", \"\")),\n)\nif err != nil {\n    panic(err)\n}\n\nclient := s3.NewFromConfig(cfg, func(o *s3.Options) {\n    o.BaseEndpoint = aws.String(\"http://localhost:5566\")\n    o.UsePathStyle = true\n})\n```\n\nThe same pattern applies to DynamoDB, KMS, STS, and other supported services.\n\n## Supported Services\n\n| Service      | Operations |\n|--------------|------------|\n| **DynamoDB** | Table CRUD, Item operations (Get/Put/Delete/Update), Query, Scan, Batch operations, Transactions, PartiQL (ExecuteStatement / BatchExecuteStatement / ExecuteTransaction), Streams, TTL, Tags, Kinesis streaming destinations |\n| **KMS**      | Key management (Create/Describe/Enable/Disable/Schedule deletion), Data plane (Encrypt/Decrypt/GenerateDataKey/GenerateDataKeyPair), Aliases, Key rotation, Grants, Tags |\n| **S3**       | Bucket CRUD, Object CRUD, Multipart Upload, Versioning, Tagging, CORS, Policy, Lifecycle, ACL (enforced), Encryption (SSE-S3 / SSE-KMS / SSE-C), Object Lock, SelectObjectContent, BucketLogging, BucketReplication, and more |\n| **STS**      | GetCallerIdentity, AssumeRole, GetSessionToken |\n\nFor the full list of supported operations, see the [documentation](https://optiflowic.github.io/kumolo-docs).\n\n## Configuration\n\n| Environment Variable  | Default   | Description                       |\n|-----------------------|-----------|-----------------------------------|\n| `KUMOLO_PORT`         | `5566`    | HTTP listen port                  |\n| `KUMOLO_DATA_DIR`     | `./data`  | Persistent storage directory      |\n| `KUMOLO_LOG_LEVEL`    | `info`    | Log level (`debug`, `info`, `warn`, `error`) |\n\n## Known Limitations\n\nkumolo aims for high fidelity, but some behaviors differ from real AWS by design or as a known gap.\n\n**DynamoDB**\n\n- `ConsumedCapacity` is returned when `ReturnConsumedCapacity` is `TOTAL` or `INDEXES`, but `CapacityUnits` is always `1.0` — actual RCU/WCU are not computed.\n- Number attribute comparisons use `float64` precision. Values with more than 15 significant digits may not compare correctly.\n\n**KMS**\n\n- Grant-based access control is not enforced — all KMS operations succeed regardless of grant `Operations` or `Constraints`.\n- Key rotation does not run on a schedule. Use `RotateKeyOnDemand` to trigger a rotation in tests.\n\n**S3**\n\n- Bucket Policy rules are stored and returned but not enforced — all requests are permitted regardless of policy content.\n- SigV4 request signatures are parsed but not cryptographically verified. This is intentional for local development.\n\n**STS**\n\n- `AssumeRole` always returns the same fixed credentials regardless of which role ARN is specified. Multiple distinct roles are not simulated.\n\n## Contributing\n\nSee [CONTRIBUTING.md](.github/CONTRIBUTING.md).\n\n## License\n\nMIT — see [LICENSE](LICENSE).\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Foptiflowic%2Fkumolo","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Foptiflowic%2Fkumolo","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Foptiflowic%2Fkumolo/lists"}