forked from TrueCloudLab/frostfs-api
321 lines
13 KiB
Markdown
321 lines
13 KiB
Markdown
# Protocol Documentation
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<a name="top"></a>
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## Table of Contents
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- [netmap/service.proto](#netmap/service.proto)
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- Services
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- [NetmapService](#neo.fs.v2.netmap.NetmapService)
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- Messages
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- [LocalNodeInfoRequest](#neo.fs.v2.netmap.LocalNodeInfoRequest)
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- [LocalNodeInfoRequest.Body](#neo.fs.v2.netmap.LocalNodeInfoRequest.Body)
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- [LocalNodeInfoResponse](#neo.fs.v2.netmap.LocalNodeInfoResponse)
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- [LocalNodeInfoResponse.Body](#neo.fs.v2.netmap.LocalNodeInfoResponse.Body)
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- [netmap/types.proto](#netmap/types.proto)
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- Messages
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- [Filter](#neo.fs.v2.netmap.Filter)
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- [NodeInfo](#neo.fs.v2.netmap.NodeInfo)
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- [NodeInfo.Attribute](#neo.fs.v2.netmap.NodeInfo.Attribute)
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- [PlacementPolicy](#neo.fs.v2.netmap.PlacementPolicy)
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- [Replica](#neo.fs.v2.netmap.Replica)
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- [Selector](#neo.fs.v2.netmap.Selector)
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- [Scalar Value Types](#scalar-value-types)
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<a name="netmap/service.proto"></a>
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<p align="right"><a href="#top">Top</a></p>
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## netmap/service.proto
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<a name="neo.fs.v2.netmap.NetmapService"></a>
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### Service "neo.fs.v2.netmap.NetmapService"
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`NetmapService` provides methods to work with `Network Map` and information
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required to build it. The resulting `Network Map` is stored in sidechain
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`Netmap` smart contract, while related information can be obtained from other
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NeoFS nodes.
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```
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rpc LocalNodeInfo(LocalNodeInfoRequest) returns (LocalNodeInfoResponse);
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```
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#### Method LocalNodeInfo
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Get NodeInfo structure from the particular node directly. Node information
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can be taken from `Netmap` smart contract, but in some cases the one may
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want to get recent information directly, or to talk to the node not yet
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present in `Network Map` to find out what API version can be used for
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further communication. Can also be used to check if node is up and running.
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| Name | Input | Output |
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| ---- | ----- | ------ |
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| LocalNodeInfo | [LocalNodeInfoRequest](#neo.fs.v2.netmap.LocalNodeInfoRequest) | [LocalNodeInfoResponse](#neo.fs.v2.netmap.LocalNodeInfoResponse) |
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<!-- end services -->
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<a name="neo.fs.v2.netmap.LocalNodeInfoRequest"></a>
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### Message LocalNodeInfoRequest
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Get NodeInfo structure from the particular node directly
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| Field | Type | Label | Description |
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| ----- | ---- | ----- | ----------- |
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| body | [LocalNodeInfoRequest.Body](#neo.fs.v2.netmap.LocalNodeInfoRequest.Body) | | Body of the LocalNodeInfo request message |
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| meta_header | [neo.fs.v2.session.RequestMetaHeader](#neo.fs.v2.session.RequestMetaHeader) | | Carries request meta information. Header data is used only to regulate message transport and does not affect request execution. |
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| verify_header | [neo.fs.v2.session.RequestVerificationHeader](#neo.fs.v2.session.RequestVerificationHeader) | | Carries request verification information. This header is used to authenticate the nodes of the message route and check the correctness of transmission. |
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<a name="neo.fs.v2.netmap.LocalNodeInfoRequest.Body"></a>
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### Message LocalNodeInfoRequest.Body
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LocalNodeInfo request body is empty.
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<a name="neo.fs.v2.netmap.LocalNodeInfoResponse"></a>
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### Message LocalNodeInfoResponse
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Local Node Info, including API Version in use
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| Field | Type | Label | Description |
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| ----- | ---- | ----- | ----------- |
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| body | [LocalNodeInfoResponse.Body](#neo.fs.v2.netmap.LocalNodeInfoResponse.Body) | | Body of the balance response message. |
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| meta_header | [neo.fs.v2.session.ResponseMetaHeader](#neo.fs.v2.session.ResponseMetaHeader) | | Carries response meta information. Header data is used only to regulate message transport and does not affect response execution. |
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| verify_header | [neo.fs.v2.session.ResponseVerificationHeader](#neo.fs.v2.session.ResponseVerificationHeader) | | Carries response verification information. This header is used to authenticate the nodes of the message route and check the correctness of transmission. |
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<a name="neo.fs.v2.netmap.LocalNodeInfoResponse.Body"></a>
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### Message LocalNodeInfoResponse.Body
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Local Node Info, including API Version in use.
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| Field | Type | Label | Description |
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| ----- | ---- | ----- | ----------- |
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| version | [neo.fs.v2.refs.Version](#neo.fs.v2.refs.Version) | | Latest NeoFS API version in use |
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| node_info | [NodeInfo](#neo.fs.v2.netmap.NodeInfo) | | NodeInfo structure with recent information from node itself |
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<!-- end messages -->
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<!-- end enums -->
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<a name="netmap/types.proto"></a>
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<p align="right"><a href="#top">Top</a></p>
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## netmap/types.proto
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<!-- end services -->
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<a name="neo.fs.v2.netmap.Filter"></a>
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### Message Filter
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Filter will return the subset of nodes from `NetworkMap` or another filter's
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results, that will satisfy filter's conditions.
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| Field | Type | Label | Description |
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| ----- | ---- | ----- | ----------- |
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| name | [string](#string) | | Name of the filter or a reference to the named filter. '*' means application to the whole unfiltered NetworkMap. At top level it's used as a filter name. At lower levels it's considered to be a reference to another named filter |
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| key | [string](#string) | | Key to filter |
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| op | [Operation](#neo.fs.v2.netmap.Operation) | | Filtering operation |
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| value | [string](#string) | | Value to match |
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| filters | [Filter](#neo.fs.v2.netmap.Filter) | repeated | List of inner filters. Top level operation will be applied to the whole list. |
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<a name="neo.fs.v2.netmap.NodeInfo"></a>
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### Message NodeInfo
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NeoFS node description
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| Field | Type | Label | Description |
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| ----- | ---- | ----- | ----------- |
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| public_key | [bytes](#bytes) | | Public key of the NeoFS node in a binary format. |
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| address | [string](#string) | | Ways to connect to a node |
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| attributes | [NodeInfo.Attribute](#neo.fs.v2.netmap.NodeInfo.Attribute) | repeated | Carries list of the NeoFS node attributes in a string key-value format. |
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| state | [NodeInfo.State](#neo.fs.v2.netmap.NodeInfo.State) | | Carries state of the NeoFS node. |
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<a name="neo.fs.v2.netmap.NodeInfo.Attribute"></a>
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### Message NodeInfo.Attribute
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Administrator-defined Attributes of the NeoFS Storage Node.
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Node's attributes are mostly used during Storage Policy evaluation to
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calculate object's placement and find a set of nodes satisfying policy
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requirements. There are some "well-known" node attributes common to all the
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Storage Nodes in the network and used implicitly with default values if not
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explicitly set:
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* Capacity \
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Total available disk space in Gigabytes.
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* Price \
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Price in GAS tokens for storing one GB of data during one Epoch. In node
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attributes it's a string presenting floating point number with comma or
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point delimiter for decimal part. In the Network Map it will be saved as
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64-bit unsigned integer representing number of minimal token fractions.
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* Subnet \
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String ID of Node's storage subnet. There can be only one subnet served
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by the Storage Node.
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* Locode \
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Node's geographic location in
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[UN/LOCODE](https://www.unece.org/cefact/codesfortrade/codes_index.html)
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format approximated to the nearest point defined in standard.
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* Country \
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Country code in
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[ISO 3166-1_alpha-2](https://en.wikipedia.org/wiki/ISO_3166-1_alpha-2)
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format. Calculated automatically from `Locode` attribute
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* Region \
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Country's administative subdivision where node is located. Calculated
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automatically from `Locode` attribute based on `SubDiv` field. Presented
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in [ISO 3166-2](https://en.wikipedia.org/wiki/ISO_3166-2) format.
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* City \
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City, town, village or rural area name where node is located written
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without diacritics . Calculated automatically from `Locode` attribute.
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For detailed description of each well-known attribute please see the
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corresponding section in NeoFS Technical specification.
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| Field | Type | Label | Description |
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| ----- | ---- | ----- | ----------- |
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| key | [string](#string) | | Key of the node attribute. |
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| value | [string](#string) | | Value of the node attribute. |
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| parents | [string](#string) | repeated | Parent keys, if any. For example for `City` it could be `Region` and `Country`. |
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<a name="neo.fs.v2.netmap.PlacementPolicy"></a>
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### Message PlacementPolicy
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Set of rules to select a subset of nodes from `NetworkMap` able to store
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container's objects. The format is simple enough to transpile from different
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storage policy definition languages.
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| Field | Type | Label | Description |
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| ----- | ---- | ----- | ----------- |
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| replicas | [Replica](#neo.fs.v2.netmap.Replica) | repeated | Rules to set number of object replicas and place each one into a named bucket |
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| container_backup_factor | [uint32](#uint32) | | Container backup factor controls how deep NeoFS will search for nodes alternatives to include into container's nodes subset |
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| selectors | [Selector](#neo.fs.v2.netmap.Selector) | repeated | Set of Selectors to form the container's nodes subset |
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| filters | [Filter](#neo.fs.v2.netmap.Filter) | repeated | List of named filters to reference in selectors |
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<a name="neo.fs.v2.netmap.Replica"></a>
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### Message Replica
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Number of object replicas in a set of nodes from the defined selector. If no
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selector set the root bucket containing all possible nodes will be used by
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default.
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| Field | Type | Label | Description |
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| ----- | ---- | ----- | ----------- |
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| count | [uint32](#uint32) | | How many object replicas to put |
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| selector | [string](#string) | | Named selector bucket to put replicas |
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<a name="neo.fs.v2.netmap.Selector"></a>
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### Message Selector
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Selector chooses a number of nodes from the bucket taking the nearest nodes
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to the provided `ContainerID` by hash distance.
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| Field | Type | Label | Description |
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| ----- | ---- | ----- | ----------- |
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| name | [string](#string) | | Selector name to reference in object placement section |
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| count | [uint32](#uint32) | | How many nodes to select from the bucket |
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| clause | [Clause](#neo.fs.v2.netmap.Clause) | | Selector modifier showing how to form a bucket |
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| attribute | [string](#string) | | Attribute bucket to select from |
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| filter | [string](#string) | | Filter reference to select from |
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<!-- end messages -->
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<a name="neo.fs.v2.netmap.Clause"></a>
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### Clause
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Selector modifier shows how the node set will be formed. By default selector
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just groups nodes into a bucket by attribute, selecting nodes only by their
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hash distance.
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| Name | Number | Description |
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| CLAUSE_UNSPECIFIED | 0 | No modifier defined. Will select nodes from bucket randomly. |
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| SAME | 1 | SAME will select only nodes having the same value of bucket attribute |
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| DISTINCT | 2 | DISTINCT will select nodes having different values of bucket attribute |
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<a name="neo.fs.v2.netmap.NodeInfo.State"></a>
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### NodeInfo.State
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Represents the enumeration of various states of the NeoFS node.
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| Name | Number | Description |
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| UNSPECIFIED | 0 | Unknown state. |
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| ONLINE | 1 | Active state in the network. |
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| OFFLINE | 2 | Network unavailable state. |
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<a name="neo.fs.v2.netmap.Operation"></a>
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### Operation
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Operations on filters
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| Name | Number | Description |
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| OPERATION_UNSPECIFIED | 0 | No Operation defined |
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| EQ | 1 | Equal |
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| NE | 2 | Not Equal |
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| GT | 3 | Greater then |
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| GE | 4 | Greater or equal |
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| LT | 5 | Less then |
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| LE | 6 | Less or equal |
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| OR | 7 | Logical OR |
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| AND | 8 | Logical AND |
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<!-- end enums -->
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## Scalar Value Types
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| .proto Type | Notes | C++ Type | Java Type | Python Type |
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| ----------- | ----- | -------- | --------- | ----------- |
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| <a name="double" /> double | | double | double | float |
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| <a name="float" /> float | | float | float | float |
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| <a name="int32" /> int32 | Uses variable-length encoding. Inefficient for encoding negative numbers – if your field is likely to have negative values, use sint32 instead. | int32 | int | int |
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| <a name="int64" /> int64 | Uses variable-length encoding. Inefficient for encoding negative numbers – if your field is likely to have negative values, use sint64 instead. | int64 | long | int/long |
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| <a name="uint32" /> uint32 | Uses variable-length encoding. | uint32 | int | int/long |
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| <a name="uint64" /> uint64 | Uses variable-length encoding. | uint64 | long | int/long |
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| <a name="sint32" /> sint32 | Uses variable-length encoding. Signed int value. These more efficiently encode negative numbers than regular int32s. | int32 | int | int |
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| <a name="sint64" /> sint64 | Uses variable-length encoding. Signed int value. These more efficiently encode negative numbers than regular int64s. | int64 | long | int/long |
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| <a name="fixed32" /> fixed32 | Always four bytes. More efficient than uint32 if values are often greater than 2^28. | uint32 | int | int |
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| <a name="fixed64" /> fixed64 | Always eight bytes. More efficient than uint64 if values are often greater than 2^56. | uint64 | long | int/long |
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| <a name="sfixed32" /> sfixed32 | Always four bytes. | int32 | int | int |
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| <a name="sfixed64" /> sfixed64 | Always eight bytes. | int64 | long | int/long |
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| <a name="bool" /> bool | | bool | boolean | boolean |
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| <a name="string" /> string | A string must always contain UTF-8 encoded or 7-bit ASCII text. | string | String | str/unicode |
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| <a name="bytes" /> bytes | May contain any arbitrary sequence of bytes. | string | ByteString | str |
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