b3039b85d5
License: MIT Signed-off-by: Hector Sanjuan <hector@protocol.ai>
181 lines
5.1 KiB
Go
181 lines
5.1 KiB
Go
// Package ipfscluster implements a wrapper for the IPFS deamon which
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// allows to orchestrate pinning operations among several IPFS nodes.
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//
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// IPFS Cluster uses a go-libp2p-raft to keep a shared state between
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// the different members of the cluster. It also uses LibP2P to enable
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// communication between its different components, which perform different
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// tasks like managing the underlying IPFS daemons, or providing APIs for
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// external control.
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package ipfscluster
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import (
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"time"
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rpc "github.com/hsanjuan/go-libp2p-rpc"
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cid "github.com/ipfs/go-cid"
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logging "github.com/ipfs/go-log"
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peer "github.com/libp2p/go-libp2p-peer"
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protocol "github.com/libp2p/go-libp2p-protocol"
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)
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var logger = logging.Logger("cluster")
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// Version is the current cluster version. Version alignment between
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// components, apis and tools ensures compatibility among them.
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const Version = "0.0.1"
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// RPCProtocol is used to send libp2p messages between cluster members
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var RPCProtocol protocol.ID = "/ipfscluster/" + Version + "/rpc"
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// SilentRaft controls whether all Raft log messages are discarded.
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var SilentRaft = true
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// SetLogLevel sets the level in the logs
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func SetLogLevel(l string) {
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/*
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CRITICAL Level = iota
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ERROR
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WARNING
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NOTICE
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INFO
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DEBUG
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*/
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logging.SetLogLevel("cluster", l)
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//logging.SetLogLevel("libp2p-rpc", l)
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//logging.SetLogLevel("swarm2", l)
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//logging.SetLogLevel("libp2p-raft", l)
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}
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// IPFSStatus values
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const (
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// IPFSStatus should never take this value
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Bug = iota
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// The cluster node is offline or not responding
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ClusterError
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// An error occurred pinning
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PinError
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// An error occurred unpinning
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UnpinError
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// The IPFS daemon has pinned the item
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Pinned
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// The IPFS daemon is currently pinning the item
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Pinning
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// The IPFS daemon is currently unpinning the item
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Unpinning
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// The IPFS daemon is not pinning the item
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Unpinned
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// The IPFS deamon is not pinning the item but it is being tracked
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RemotePin
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)
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// IPFSStatus represents the status of a tracked Cid in the IPFS daemon
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type IPFSStatus int
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// GlobalPinInfo contains cluster-wide status information about a tracked Cid,
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// indexed by cluster member.
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type GlobalPinInfo struct {
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Cid *cid.Cid
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Status map[peer.ID]PinInfo
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}
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// PinInfo holds information about local pins. PinInfo is
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// serialized when requesting the Global status, therefore
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// we cannot use *cid.Cid.
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type PinInfo struct {
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CidStr string
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Peer peer.ID
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IPFS IPFSStatus
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TS time.Time
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Error string
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}
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// String converts an IPFSStatus into a readable string.
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func (st IPFSStatus) String() string {
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switch st {
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case Bug:
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return "bug"
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case PinError:
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return "pin_error"
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case UnpinError:
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return "unpin_error"
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case Pinned:
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return "pinned"
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case Pinning:
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return "pinning"
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case Unpinning:
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return "unpinning"
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case Unpinned:
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return "unpinned"
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}
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return ""
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}
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// Component represents a piece of ipfscluster. Cluster components
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// usually run their own goroutines (a http server for example). They
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// communicate with the main Cluster component and other components
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// (both local and remote), using an instance of rpc.Client.
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type Component interface {
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SetClient(*rpc.Client)
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Shutdown() error
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}
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// API is a component which offers an API for Cluster. This is
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// a base component.
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type API interface {
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Component
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}
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// IPFSConnector is a component which allows cluster to interact with
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// an IPFS daemon. This is a base component.
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type IPFSConnector interface {
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Component
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Pin(*cid.Cid) error
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Unpin(*cid.Cid) error
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IsPinned(*cid.Cid) (bool, error)
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}
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// Peered represents a component which needs to be aware of the peers
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// in the Cluster and of any changes to the peer set.
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type Peered interface {
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AddPeer(p peer.ID)
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RmPeer(p peer.ID)
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SetPeers(peers []peer.ID)
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}
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// State represents the shared state of the cluster and it
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// is used by the Consensus component to keep track of
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// objects which objects are pinned. This component should be thread safe.
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type State interface {
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// AddPin adds a pin to the State
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AddPin(*cid.Cid) error
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// RmPin removes a pin from the State
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RmPin(*cid.Cid) error
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// ListPins lists all the pins in the state
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ListPins() []*cid.Cid
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// HasPin returns true if the state is holding a Cid
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HasPin(*cid.Cid) bool
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}
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// PinTracker represents a component which tracks the status of
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// the pins in this cluster and ensures they are in sync with the
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// IPFS daemon. This component should be thread safe.
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type PinTracker interface {
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Component
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// Track tells the tracker that a Cid is now under its supervision
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// The tracker may decide to perform an IPFS pin.
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Track(*cid.Cid) error
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// Untrack tells the tracker that a Cid is to be forgotten. The tracker
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// may perform an IPFS unpin operation.
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Untrack(*cid.Cid) error
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// Status returns the list of pins with their local status.
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Status() []PinInfo
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// StatusCid returns the local status of a given Cid.
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StatusCid(*cid.Cid) PinInfo
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// Sync makes sure that the Cid status reflect the real IPFS status.
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// The return value indicates if the Cid status deserved attention,
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// either because its state was updated or because it is in error state.
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Sync(*cid.Cid) bool
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// Recover retriggers a Pin/Unpin operation in Cids with error status.
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Recover(*cid.Cid) error
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}
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