{"id":50797506,"url":"https://github.com/maruyamaworks/circus","last_synced_at":"2026-06-12T15:34:09.949Z","repository":{"id":214355392,"uuid":"168734407","full_name":"maruyamaworks/circus","owner":"maruyamaworks","description":"FUSE-based file system backed by Amazon S3","archived":false,"fork":false,"pushed_at":"2019-02-27T19:12:33.000Z","size":23,"stargazers_count":0,"open_issues_count":0,"forks_count":0,"subscribers_count":1,"default_branch":"master","last_synced_at":"2026-06-12T15:34:09.058Z","etag":null,"topics":["aws","filesystem","fuse","ruby","s3"],"latest_commit_sha":null,"homepage":"","language":"Ruby","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":null,"status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/maruyamaworks.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":null,"code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null,"roadmap":null,"authors":null}},"created_at":"2019-02-01T17:24:45.000Z","updated_at":"2019-02-27T19:12:35.000Z","dependencies_parsed_at":"2023-12-27T16:27:48.569Z","dependency_job_id":"8d5cd626-3e35-43f6-ac27-881f62737be4","html_url":"https://github.com/maruyamaworks/circus","commit_stats":null,"previous_names":["clerk67/circus","maruyamaworks/circus"],"tags_count":0,"template":false,"template_full_name":null,"purl":"pkg:github/maruyamaworks/circus","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/maruyamaworks%2Fcircus","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/maruyamaworks%2Fcircus/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/maruyamaworks%2Fcircus/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/maruyamaworks%2Fcircus/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/maruyamaworks","download_url":"https://codeload.github.com/maruyamaworks/circus/tar.gz/refs/heads/master","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/maruyamaworks%2Fcircus/sbom","scorecard":null,"host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":286080680,"owners_count":34251774,"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":"2026-06-12T02:00:06.859Z","response_time":109,"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","filesystem","fuse","ruby","s3"],"created_at":"2026-06-12T15:34:09.253Z","updated_at":"2026-06-12T15:34:09.943Z","avatar_url":"https://github.com/maruyamaworks.png","language":"Ruby","funding_links":[],"categories":[],"sub_categories":[],"readme":"# Circus\n\nFUSE-based file system backed by Amazon S3\n\n\u003e **WARNING:** Circus is still under the development! Be careful to use in your environment.\n\n## Features\n\n- **Unlimited storage capacity** provided by Amazon S3\n- Support renaming of files and directories (including **non-empty directories**)\n- Support caching object attributes to reduce requests and improve performance\n- Support **external memcached cluster** as cache store to share data among multiple clients\n\n## Requirements\n\n- Linux (macOS is not supported)\n- [Ruby](https://www.ruby-lang.org/) \u003e= 2.4.0\n- [Bundler](https://bundler.io/)\n- [FUSE](http://fuse.sourceforge.net/)\n\nCircus requires some permissions to access your AWS resources. The required AWS managed IAM policies are:\n\n- **AmazonS3FullAccess**\n- **AmazonCloudWatchReadOnlyAccess** (for getting statistics returned for `df` request)\n\nThe following is an example of minimum required IAM policy document:\n\n```json\n{\n  \"Version\": \"2012-10-17\",\n  \"Statement\": [\n    {\n      \"Effect\": \"Allow\",\n      \"Action\": [\n        \"s3:GetBucketLocation\",\n        \"s3:ListBucket\"\n      ],\n      \"Resource\": \"arn:aws:s3:::examplebucket\"\n    },\n    {\n      \"Effect\": \"Allow\",\n      \"Action\": [\n        \"s3:DeleteObject\",\n        \"s3:GetObject\",\n        \"s3:PutObject\"\n      ],\n      \"Resource\": \"arn:aws:s3:::examplebucket/*\"\n    },\n    {\n      \"Effect\": \"Allow\",\n      \"Action\": [\n        \"cloudwatch:GetMetricData\"\n      ],\n      \"Resource\": \"*\"\n    }\n  ]\n}\n```\n\n## Getting Started\n\nThe following is an example provisioning procedure for [Amazon Linux 2](https://aws.amazon.com/amazon-linux-2/) running on Amazon EC2 instances:\n\n```bash\n# install ruby\nsudo amazon-linux-extras install ruby2.4\n\n# install dependencies\nsudo yum install fuse fuse-devel gcc git rpm-build ruby-devel\n\n# install bundler\ngem install bundler --no-document\n\n# check out this repository\ngit clone https://github.com/clerk67/circus \u0026\u0026 cd circus\n\n# install rubygems\nbundle install\n\n# create mountpoint\nmkdir mountpoint\n\n# mount bucket\nbin/circus examplebucket mountpoint -o _netdev,rw,allow_other\n\n# list bucket contents\nls mountpoint\n\n# unmount bucket\nfusermount -u mountpoint\n```\n\nYou can use `mount` command by creating symbolic link in `/usr/sbin`.\n\n```bash\n# create symbolic link\nsudo ln -s /usr/sbin/mount.s3 /path/to/circus\n\n# mount bucket\nmount -t s3 examplebucket /path/to/mountpoint -o _netdev,rw,allow_other\n```\n\nTo mount your Amazon S3 bucket on system startup, add the following line to `/etc/fstab`:\n\n```\n/path/to/circus#examplebucket /path/to/mountpoint fuse _netdev,rw,allow_other 0 0\n```\n\n## Command Line Options\n\n- `-o OPTIONS`\n\n    The mount options that would be passed to the `mount` command.\n\n- `--region REGION`\n\n    The name of AWS Region where your Amazon S3 bucket is located. If not specified, Circus will automatically detect the location of your bucket.\n\n- `--log_output PATH`\n\n    The path to the file where errors should be logged. If the special value `STDOUT` or `STDERR` is used, the errors are sent to stdout or stderr instead. By default, logging is disabled.\n\n- `--log_level LEVEL`\n\n    The severity threshold of logging. You can give one of the following levels: `FATAL`, `ERROR`, `WARN` (default), `INFO`, and `DEBUG`. Only messages at that level or higher will be logged.\n\n- `--cache TYPE[:OPTIONS]`\n\n    Select cache driver you would like to be used for caching objects' attributes. By default, Circus is configured to use the `memory` store. The valid values are:\n\n    - `file[:DIR_PATH]`\n\n        uses the local file system to store data. `DIR_PATH` represents the path to the directory where the store files will be stored (default: `/tmp/cache`).\n\n    - `memory[:MAX_SIZE]`\n\n        keeps data in memory in the same Circus process. `MAX_SIZE` represents the bounded size (in megabytes) of the cache store (default: 32 MB).\n\n    - `memcached:HOST:PORT[:HOST:PORT ...]`\n\n        uses memcached server to provide a centralized cache. `HOST:PORT` represents the addresses for all memcached servers in your cluster (default: 'localhost:11211').\n\n- `--cache_ttl NUMBER`\n\n    The number of seconds for which objects' attributes should be cached. This value must be larger than zero. The default value is 300 (5 minutes).\n\n- `--access_key_id STRING`\n- `--secret_access_key KEY`\n\n    The AWS credentials which is required to access your AWS resources. If not specified, the default credential profiles file (typically located at `~/.aws/credentials`) or Amazon EC2 instance profile credentials will be used.\n\n    **WARNING:** This is convenient but insecure. On some systems, your password becomes visible to system status programs such as `ps` that may be invoked by other users to display command lines. You should consider using environment variables or Amazon EC2 instance profiles instead.\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fmaruyamaworks%2Fcircus","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fmaruyamaworks%2Fcircus","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fmaruyamaworks%2Fcircus/lists"}