116 lines
2.4 KiB
Go
116 lines
2.4 KiB
Go
// Package disk implements an ipfs-cluster informer which can provide different
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// disk-related metrics from the IPFS daemon as an api.Metric.
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package disk
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import (
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"context"
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"fmt"
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"github.com/ipfs/ipfs-cluster/api"
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logging "github.com/ipfs/go-log"
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rpc "github.com/libp2p/go-libp2p-gorpc"
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"go.opencensus.io/trace"
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)
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// MetricType identifies the type of metric to fetch from the IPFS daemon.
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type MetricType int
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const (
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// MetricFreeSpace provides the available space reported by IPFS
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MetricFreeSpace = iota
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// MetricRepoSize provides the used space reported by IPFS
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MetricRepoSize
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)
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var logger = logging.Logger("diskinfo")
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// Informer is a simple object to implement the ipfscluster.Informer
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// and Component interfaces.
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type Informer struct {
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config *Config
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rpcClient *rpc.Client
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}
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// NewInformer returns an initialized informer using the given InformerConfig.
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func NewInformer(cfg *Config) (*Informer, error) {
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err := cfg.Validate()
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if err != nil {
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return nil, err
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}
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return &Informer{
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config: cfg,
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}, nil
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}
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// Name returns the user-facing name of this informer.
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func (disk *Informer) Name() string {
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return disk.config.MetricType.String()
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}
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// SetClient provides us with an rpc.Client which allows
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// contacting other components in the cluster.
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func (disk *Informer) SetClient(c *rpc.Client) {
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disk.rpcClient = c
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}
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// Shutdown is called on cluster shutdown. We just invalidate
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// any metrics from this point.
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func (disk *Informer) Shutdown(ctx context.Context) error {
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ctx, span := trace.StartSpan(ctx, "informer/disk/Shutdown")
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defer span.End()
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disk.rpcClient = nil
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return nil
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}
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// GetMetric returns the metric obtained by this
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// Informer.
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func (disk *Informer) GetMetric(ctx context.Context) *api.Metric {
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ctx, span := trace.StartSpan(ctx, "informer/disk/GetMetric")
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defer span.End()
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if disk.rpcClient == nil {
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return &api.Metric{
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Name: disk.Name(),
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Valid: false,
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}
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}
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var repoStat api.IPFSRepoStat
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var metric uint64
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valid := true
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err := disk.rpcClient.CallContext(
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ctx,
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"",
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"IPFSConnector",
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"RepoStat",
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struct{}{},
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&repoStat,
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)
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if err != nil {
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logger.Error(err)
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valid = false
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} else {
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switch disk.config.MetricType {
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case MetricFreeSpace:
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metric = repoStat.StorageMax - repoStat.RepoSize
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case MetricRepoSize:
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metric = repoStat.RepoSize
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}
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}
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m := &api.Metric{
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Name: disk.Name(),
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Value: fmt.Sprintf("%d", metric),
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Valid: valid,
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}
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m.SetTTL(disk.config.MetricTTL)
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return m
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}
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