3b3f786d68
This commit adds support for OpenCensus tracing and metrics collection. This required support for context.Context propogation throughout the cluster codebase, and in particular, the ipfscluster component interfaces. The tracing propogates across RPC and HTTP boundaries. The current default tracing backend is Jaeger. The metrics currently exports the metrics exposed by the opencensus http plugin as well as the pprof metrics to a prometheus endpoint for scraping. The current default metrics backend is Prometheus. Metrics are currently exposed by default due to low overhead, can be turned off if desired, whereas tracing is off by default as it has a much higher performance overhead, though the extent of the performance hit can be adjusted with smaller sampling rates. License: MIT Signed-off-by: Adrian Lanzafame <adrianlanzafame92@gmail.com>
118 lines
2.3 KiB
Go
118 lines
2.3 KiB
Go
package disk
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import (
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"context"
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"errors"
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"testing"
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rpc "github.com/libp2p/go-libp2p-gorpc"
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"github.com/ipfs/ipfs-cluster/api"
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"github.com/ipfs/ipfs-cluster/test"
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)
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type badRPCService struct {
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}
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func badRPCClient(t *testing.T) *rpc.Client {
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s := rpc.NewServer(nil, "mock")
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c := rpc.NewClientWithServer(nil, "mock", s)
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err := s.RegisterName("Cluster", &badRPCService{})
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if err != nil {
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t.Fatal(err)
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}
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return c
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}
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func (mock *badRPCService) IPFSRepoStat(ctx context.Context, in struct{}, out *api.IPFSRepoStat) error {
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return errors.New("fake error")
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}
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func Test(t *testing.T) {
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ctx := context.Background()
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cfg := &Config{}
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cfg.Default()
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inf, err := NewInformer(cfg)
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if err != nil {
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t.Fatal(err)
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}
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defer inf.Shutdown(ctx)
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m := inf.GetMetric(ctx)
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if m.Valid {
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t.Error("metric should be invalid")
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}
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inf.SetClient(test.NewMockRPCClient(t))
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m = inf.GetMetric(ctx)
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if !m.Valid {
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t.Error("metric should be valid")
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}
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}
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func TestFreeSpace(t *testing.T) {
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ctx := context.Background()
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cfg := &Config{}
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cfg.Default()
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cfg.Type = MetricFreeSpace
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inf, err := NewInformer(cfg)
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if err != nil {
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t.Fatal(err)
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}
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defer inf.Shutdown(ctx)
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m := inf.GetMetric(ctx)
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if m.Valid {
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t.Error("metric should be invalid")
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}
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inf.SetClient(test.NewMockRPCClient(t))
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m = inf.GetMetric(ctx)
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if !m.Valid {
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t.Error("metric should be valid")
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}
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// The mock client reports 100KB and 2 pins of 1 KB
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if m.Value != "98000" {
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t.Error("bad metric value")
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}
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}
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func TestRepoSize(t *testing.T) {
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ctx := context.Background()
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cfg := &Config{}
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cfg.Default()
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cfg.Type = MetricRepoSize
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inf, err := NewInformer(cfg)
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if err != nil {
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t.Fatal(err)
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}
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defer inf.Shutdown(ctx)
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m := inf.GetMetric(ctx)
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if m.Valid {
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t.Error("metric should be invalid")
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}
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inf.SetClient(test.NewMockRPCClient(t))
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m = inf.GetMetric(ctx)
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if !m.Valid {
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t.Error("metric should be valid")
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}
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// The mock client reports 100KB and 2 pins of 1 KB
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if m.Value != "2000" {
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t.Error("bad metric value")
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}
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}
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func TestWithErrors(t *testing.T) {
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ctx := context.Background()
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cfg := &Config{}
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cfg.Default()
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inf, err := NewInformer(cfg)
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if err != nil {
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t.Fatal(err)
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}
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defer inf.Shutdown(ctx)
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inf.SetClient(badRPCClient(t))
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m := inf.GetMetric(ctx)
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if m.Valid {
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t.Errorf("metric should be invalid")
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}
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}
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