# NeoFS S3 Gateway NeoFS S3 gateway provides API compatible with Amazon S3 cloud storage service. ## Installation ```go get -u github.com/nspcc-dev/neofs-s3-gw``` Or you can call `make` to build it from the cloned repository (the binary will end up in `bin/neofs-s3-gw` with authmate helper in `bin/neofs-authmate`). Notable make targets: ``` dep Check and ensure dependencies image Build clean docker image dirty-image Build dirty docker image with host-built binaries format Run all code formatters lint Run linters version Show current version ``` Or you can also use a [Docker image](https://hub.docker.com/r/nspccdev/neofs-s3-gw) provided for released (and occasionally unreleased) versions of gateway (`:latest` points to the latest stable release). ## Execution Minimalistic S3 gateway setup needs: * NeoFS node(s) address (S3 gateway itself is not a NeoFS node) Passed via `-p` parameter or via `S3_GW_PEERS__ADDRESS` and `S3_GW_PEERS__WEIGHT` environment variables (gateway supports multiple NeoFS nodes with weighted load balancing). * a key used to communicate with NeoFS nodes Passed via `--neofs-key` parameter or `S3_GW_NEOFS-KEY` environment variable. * a key used for client authentication Passed via `--auth-key` parameter or `S3_GW_AUTH-KEY` environment variable. To generate it use `neofs-authmate generate-keys` command. These two commands are functionally equivalent, they run the gate with one backend node, some keys and otherwise default settings: ``` $ neofs-s3-gw -p 192.168.130.72:8080 --neofs-key KxDgvEKzgSBPPfuVfw67oPQBSjidEiqTHURKSDL1R7yGaGYAeYnr \ --auth-key a04edd5b3c497eed83be25fb136bafd056928c17986440745775223615f2cbab $ S3_GW_PEERS_0_ADDRESS=192.168.130.72:8080 \ S3_GW_NEOFS-KEY=KxDgvEKzgSBPPfuVfw67oPQBSjidEiqTHURKSDL1R7yGaGYAeYnr \ S3_GW_AUTH-KEY=a04edd5b3c497eed83be25fb136bafd056928c17986440745775223615f2cbab \ neofs-s3-gw ``` ## Configuration In general, everything available as CLI parameter can also be specified via environment variables, so they're not specifically mentioned in most cases (see `--help` also). ### Nodes and weights You can specify multiple `-p` options to add more NeoFS nodes, this will make gateway spread requests equally among them (using weight 1 for every node): ``` $ neofs-s3-gw -p 192.168.130.72:8080 -p 192.168.130.71:8080 ``` If you want some specific load distribution proportions, use weights, but they can only be specified via environment variables: ``` $ HTTP_GW_PEERS_0_ADDRESS=192.168.130.72:8080 HTTP_GW_PEERS_0_WEIGHT=9 \ HTTP_GW_PEERS_1_ADDRESS=192.168.130.71:8080 HTTP_GW_PEERS_1_WEIGHT=1 neofs-s3-gw ``` This command will make gateway use 192.168.130.72 for 90% of requests and 192.168.130.71 for remaining 10%. ### Keys NeoFS (`--neofs-key`) and authentication (`--auth-key`) keys are mandatory parameters. NeoFS key can be a path to private key file (as raw bytes), a hex string or (unencrypted) WIF string. Authentication key is either a path to raw private key file or a hex string. ### Binding and TLS Gateway binds to `0.0.0.0:8080` by default and you can change that with `--listen_address` option. It can also provide TLS interface for its users, just specify paths to key and certificate files via `--tls.key_file` and `--tls.cert_file` parameters. Note that using these options makes gateway TLS-only, if you need to serve both TLS and plain text you either have to run two gateway instances or use some external redirecting solution. Example to bind to `192.168.130.130:443` and serve TLS there (keys and nodes omitted): ``` $ neofs-s3-gw --listen_address 192.168.130.130:443 \ --tls.key_file=key.pem --tls.cert_file=cert.pem ``` ### Monitoring and metrics Pprof and Prometheus are integrated into the gateway, but not enabled by default. To enable them use `--pprof` and `--metrics` flags or `HTTP_GW_PPROF`/`HTTP_GW_METRICS` environment variables. ## S3 API supported Reference: * [AWS S3 API Reference](https://docs.aws.amazon.com/AmazonS3/latest/API/s3-api.pdf) ### Bucket/Object-Level Actions | # | Method Name | Status | |:---:| ------------------------- | ----------------------- | | 1 | AbortMultipartUpload | Unsupported | | 2 | CompleteMultipartUpload | Unsupported | | 3 | CopyObject | Supported | | 4 | CopyObjectPart | Unsupported | | 5 | DeleteBucket | Unsupported | | 6 | DeleteBucketEncryption | Unsupported | | 7 | DeleteBucketLifecycle | Unsupported | | 8 | DeleteBucketPolicy | Unsupported | | 9 | DeleteBucketTagging | Unsupported | | 10 | DeleteBucketWebsite | Unsupported | | 11 | DeleteMultipleObjects | Supported | | 12 | DeleteObject | Supported | | 13 | DeleteObjectTagging | Unsupported | | 14 | GetBucketACL | Unsupported | | 15 | GetBucketAccelerate | Supported | | 16 | GetBucketCors | Unsupported | | 17 | GetBucketEncryption | Unsupported | | 18 | GetBucketLifecycle | Unsupported | | 19 | GetBucketLocation | Unsupported | | 20 | GetBucketLogging | Unsupported | | 21 | GetBucketNotification | Unsupported | | 22 | GetBucketObjectLockConfig | Unsupported | | 23 | GetBucketPolicy | Unsupported | | 24 | GetBucketReplication | Unsupported | | 25 | GetBucketRequestPayment | Unsupported | | 26 | GetBucketTagging | Unsupported | | 27 | GetBucketVersioning | Unsupported | | 28 | GetBucketWebsite | Unsupported | | 29 | GetObject | Supported | | 30 | GetObjectACL | Unsupported | | 31 | GetObjectLegalHold | Unsupported | | 32 | GetObjectRetention | Unsupported | | 33 | HeadBucket | Supported | | 34 | HeadObject | Supported | | 35 | ListBucketObjectVersions | Unsupported | | 36 | ListBuckets | Supported | | 37 | ListMultipartUploads | Unsupported | | 38 | ListObjectParts | Unsupported | | 39 | ListObjectsV1 | Supported | | 40 | ListObjectsV2 | Supported | | 41 | ListenBucketNotification | Unsupported | | 42 | NewMultipartUpload | Unsupported | | 43 | PostPolicyBucket | Unsupported | | 44 | PutBucket | Unsupported | | 45 | PutBucketACL | Unsupported | | 46 | PutBucketEncryption | Unsupported | | 47 | PutBucketLifecycle | Unsupported | | 48 | PutBucketNotification | Unsupported | | 49 | PutBucketObjectLockConfig | Unsupported | | 50 | PutBucketPolicy | Unsupported | | 51 | PutBucketTagging | Unsupported | | 52 | PutBucketVersioning | Unsupported | | 53 | PutObject | Supported | | 54 | PutObjectACL | Unsupported | | 55 | PutObjectLegalHold | Unsupported | | 56 | PutObjectPart | Unsupported | | 57 | PutObjectRetention | Unsupported | | 58 | PutObjectTagging | Unsupported | | 59 | SelectObjectContent | Unsupported | ## NeoFS AuthMate Authmate is a tool to create gateway key pairs and AWS credentials. AWS users are authenticated with access key IDs and secrets, while NeoFS users are authenticated with key pairs. To complicate things further we have S3 gateway that usually acts on behalf of some user, but user doesn't necessarily want to give his keys to the gateway. To solve this we use NeoFS bearer tokens that are signed by the owner (NeoFS "user") and that can implement any kind of policy for NeoFS requests allowed using this token. But tokens can't be used directly as AWS credentials, thus they're stored on NeoFS as regular objects and access key ID is just an address of this object while secret is an SHA256 hash of this key. Tokens are not stored on NeoFS in plaintext, they're encrypted with a set of gateway keys. So in order for gateway to be able to successfully extract bearer token the object needs to be stored in a container available for the gateway to read and it needs to be encrypted with this gateway's key (among others potentially). #### Generation of key pairs To generate key pairs for gateways, run the following command (`--count` is 1 by default): ``` $ ./neofs-authmate generate-keys --count=2 [ { "private_key": "b8ba980eb70b959be99915d2e0ad377809984ccd1dac0a6551907f81c2b33d21", "public_key": "dd34f6dce9a4ce0990869ec6bd33a40e102a5798881cfe61d03a5659ceee1a64" }, { "private_key": "407c351b17446ca07521faceb8b7d3e738319635f39f892419e2bf94462b4419", "public_key": "20453af9d7f245ff6fdfb1260eaa411ae3be9c519a2a9bf1c98233522cbd0156" } ] ``` Private key is the one to use for `neofs-s3-gw` command, public one can be used to create new AWS credentials. #### Issuance of a secret To issue a secret means to create a Bearer token and put it as an object into container on the NeoFS network. The token is encrypted by a set of gateway keys, so you need to pass them as well. If a parameter `container-id` is not set, a new container will be created. If a parameter `rules` is not set, it will be auto-generated with values: ``` { "version": { "major": 2, "minor": 6 }, "containerID": { "value": "%CID" }, "records": [ { "operation": "GET", "action": "ALLOW", "filters": [], "targets": [ { "role": "OTHERS", "keys": [] } ] } ] } ``` Example of a command to issue a secret with custom rules for multiple gates: ``` $ ./neofs-authmate issue-secret --neofs-key user.key \ --peer 192.168.130.71:8080 \ --rules '{"records":[{"operation":"PUT","action":"ALLOW","filters":[],"targets":[{"role":"OTHERS","keys":[]}]}]}' \ --gate-public-key dd34f6dce9a4ce0990869ec6bd33a40e102a5798881cfe61d03a5659ceee1a64 \ --gate-public-key 20453af9d7f245ff6fdfb1260eaa411ae3be9c519a2a9bf1c98233522cbd0156 { "access_key_id": "5g933dyLEkXbbAspouhPPTiyLZRg4axBW1axSPD87eVT_AiXsH4AjYy1iTJ4C1WExzjBrSobJsQFWEyKLREe5sQYM", "secret_access_key": "438bbd8243060e1e1c9dd4821756914a6e872ce29bf203b68f81b140ac91231c", "owner_private_key": "274fdd6e71fc6a6b8fe77bec500254115d66d6d17347d7db0880d2eb80afc72a" } ``` Access key ID and secret access key are AWS credentials that you can use with any S3 client. #### Obtainment of a secret access key You can get a secret access key associated with access key ID by obtaining a secret stored on the NeoFS network: ``` $ ./neofs-authmate obtain-secret --neofs-key user.key \ --peer 192.168.130.71:8080 \ --gate-private-key b8ba980eb70b959be99915d2e0ad377809984ccd1dac0a6551907f81c2b33d21 \ --access-key-id 5g933dyLEkXbbAspouhPPTiyLZRg4axBW1axSPD87eVT_AiXsH4AjYy1iTJ4C1WExzjBrSobJsQFWEyKLREe5sQYM { "secret_access_key": "438bbd8243060e1e1c9dd4821756914a6e872ce29bf203b68f81b140ac91231c" } ```