acbd7fda60
This adds a new "crdt" consensus component using go-ds-crdt. This implies several refactors to fully make cluster consensus-component independent: * Delete mapstate and fully adopt dsstate (after people have migrated). * Return errors from state methods rather than ignoring them. * Add a new "datastore" modules so that we can configure datastores in the main configuration like other components. * Let the consensus components fully define the "state.State". Thus, they do not receive the state, they receive the storage where we put the state (a go-datastore). * Allow to customize how the monitor component obtains Peers() (the current peerset), including avoiding using the current peerset. At the moment the crdt consensus uses the monitoring component to define the current peerset. Therefore the monitor component cannot rely on the consensus component to produce a peerset. * Re-factor/re-implementation of "ipfs-cluster-service state" operations. Includes the dissapearance of the "migrate" one. The CRDT consensus component defines creates a crdt-datastore (with ipfs-lite) and uses it to intitialize a dssate. Thus the crdt-store is elegantly wrapped. Any modifications to the state get automatically replicated to other peers. We store all the CRDT DAG blocks in the local datastore. The consensus components only expose a ReadOnly state, as any modifications to the shared state should happen through them. DHT and PubSub facilities must now be created outside of Cluster and passed in so they can be re-used by different components.
113 lines
2.3 KiB
Go
113 lines
2.3 KiB
Go
package metrics
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import (
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"sync"
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"github.com/ipfs/ipfs-cluster/api"
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peer "github.com/libp2p/go-libp2p-peer"
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)
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// PeerMetrics maps a peer IDs to a metrics window.
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type PeerMetrics map[peer.ID]*Window
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// Store can be used to store and access metrics.
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type Store struct {
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mux sync.RWMutex
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byName map[string]PeerMetrics
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}
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// NewStore can be used to create a Store.
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func NewStore() *Store {
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return &Store{
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byName: make(map[string]PeerMetrics),
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}
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}
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// Add inserts a new metric in Metrics.
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func (mtrs *Store) Add(m *api.Metric) {
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mtrs.mux.Lock()
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defer mtrs.mux.Unlock()
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name := m.Name
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peer := m.Peer
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mbyp, ok := mtrs.byName[name]
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if !ok {
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mbyp = make(PeerMetrics)
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mtrs.byName[name] = mbyp
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}
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window, ok := mbyp[peer]
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if !ok {
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// We always lock the outer map, so we can use unsafe
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// Window.
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window = NewWindow(DefaultWindowCap)
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mbyp[peer] = window
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}
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window.Add(m)
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}
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// LatestValid returns all the last known valid metrics of a given type. A metric
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// is valid if it has not expired.
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func (mtrs *Store) LatestValid(name string) []*api.Metric {
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mtrs.mux.RLock()
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defer mtrs.mux.RUnlock()
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byPeer, ok := mtrs.byName[name]
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if !ok {
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return []*api.Metric{}
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}
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metrics := make([]*api.Metric, 0, len(byPeer))
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for _, window := range byPeer {
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m, err := window.Latest()
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if err != nil || m.Discard() {
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continue
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}
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metrics = append(metrics, m)
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}
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return metrics
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}
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// AllMetrics returns the latest metrics for all peers and metrics types. It
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// may return expired metrics.
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func (mtrs *Store) AllMetrics() []*api.Metric {
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mtrs.mux.RLock()
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defer mtrs.mux.RUnlock()
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result := make([]*api.Metric, 0)
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for _, byPeer := range mtrs.byName {
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for _, window := range byPeer {
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metric, err := window.Latest()
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if err != nil || !metric.Valid {
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continue
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}
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result = append(result, metric)
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}
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}
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return result
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}
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// PeerMetrics returns the latest metrics for a given peer ID for
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// all known metrics types. It may return expired metrics.
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func (mtrs *Store) PeerMetrics(pid peer.ID) []*api.Metric {
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mtrs.mux.RLock()
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defer mtrs.mux.RUnlock()
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result := make([]*api.Metric, 0)
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for _, byPeer := range mtrs.byName {
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window, ok := byPeer[pid]
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if !ok {
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continue
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}
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metric, err := window.Latest()
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if err != nil || !metric.Valid {
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continue
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}
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result = append(result, metric)
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}
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return result
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}
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