Allow overriding timestamps to current timestamp

.golangci.yml

@@ -44,13 +44,17 @@ issues:
 
 linters-settings:
   depguard:
-    list-type: blacklist
-    include-go-root: true
-    packages-with-error-message:
-      - sync/atomic: "Use go.uber.org/atomic instead of sync/atomic"
-      - github.com/stretchr/testify/assert: "Use github.com/stretchr/testify/require instead of github.com/stretchr/testify/assert"
-      - github.com/go-kit/kit/log: "Use github.com/go-kit/log instead of github.com/go-kit/kit/log"
-      - github.com/pkg/errors: "Use fmt.Errorf instead"
+    rules:
+      Main:
+        deny:
+          - pkg: sync/atomic
+            desc: Use go.uber.org/atomic instead of sync/atomic
+          - pkg: github.com/stretchr/testify/assert
+            desc: Use github.com/stretchr/testify/require instead of github.com/stretchr/testify/assert
+          - pkg: github.com/go-kit/kit/log
+            desc: Use github.com/go-kit/log instead of github.com/go-kit/kit/log
+          - pkg: github.com/pkg/errors
+            desc: Use fmt.Errorf instead
   errcheck:
     exclude: ./.errcheck_excludes.txt
   goimports:

README.md

@@ -24,6 +24,8 @@ Flags:
                                  --labels=node=foo
       --normalized               Whether the profile sample addresses are
                                  already normalized by the mapping offset.
+      --override-timestamp       Update the timestamp in the pprof profile to be
+                                 the current time.
       --remote-store-address=STRING
                                  gRPC address to send profiles and symbols to.
       --remote-store-bearer-token=STRING

cmd/parca-push/main.go

@@ -15,13 +15,16 @@
 package main
 
 import (
+	"bytes"
 	"context"
 	"crypto/tls"
 	"fmt"
 	"io"
 	"os"
+	"time"
 
 	"github.com/alecthomas/kong"
+	"github.com/google/pprof/profile"
 	grpc_prometheus "github.com/grpc-ecosystem/go-grpc-prometheus"
 	grun "github.com/oklog/run"
 	profilestorepb "github.com/parca-dev/parca/gen/proto/go/parca/profilestore/v1alpha1"
@@ -32,9 +35,10 @@ import (
 )
 
 type flags struct {
-	Path       string            `kong:"arg,help='Path to the profile data.'"`
-	Labels     map[string]string `kong:"help='Labels to attach to the profile data. For example --labels=__name__=process_cpu --labels=node=foo',short='l'"`
-	Normalized bool              `kong:"help='Whether the profile sample addresses are already normalized by the mapping offset.',default='false'"`
+	Path              string            `kong:"arg,help='Path to the profile data.'"`
+	Labels            map[string]string `kong:"help='Labels to attach to the profile data. For example --labels=__name__=process_cpu --labels=node=foo',short='l'"`
+	Normalized        bool              `kong:"help='Whether the profile sample addresses are already normalized by the mapping offset.',default='false'"`
+	OverrideTimestamp bool              `kong:"help='Update the timestamp in the pprof profile to be the current time.'"`
 
 	RemoteStore FlagsRemoteStore `embed:"" prefix:"remote-store-"`
 }
@@ -75,27 +79,42 @@ func run(flags flags) error {
 		}
 		defer conn.Close()
 
-		var profile []byte
+		var profileContent []byte
 		if flags.Path == "-" {
-			profile, err = io.ReadAll(os.Stdin)
+			profileContent, err = io.ReadAll(os.Stdin)
 			if err != nil {
 				return fmt.Errorf("read profile from stdin: %w", err)
 			}
 		} else {
-			profile, err = os.ReadFile(flags.Path)
+			profileContent, err = os.ReadFile(flags.Path)
 			if err != nil {
 				return fmt.Errorf("read profile file: %w", err)
 			}
 		}
 
+		p, err := profile.ParseData(profileContent)
+		if err != nil {
+			return fmt.Errorf("parse pprof profile: %w", err)
+		}
+
+		if flags.OverrideTimestamp {
+			now := time.Now()
+			p.TimeNanos = now.UnixNano()
+			buf := bytes.NewBuffer(nil)
+			if err := p.Write(buf); err != nil {
+				return fmt.Errorf("serialize pprof profile: %w", err)
+			}
+			profileContent = buf.Bytes()
+		}
+
 		profilestoreClient := profilestorepb.NewProfileStoreServiceClient(conn)
 		_, err = profilestoreClient.WriteRaw(ctx, &profilestorepb.WriteRawRequest{
 			Series: []*profilestorepb.RawProfileSeries{{
 				Labels: &profilestorepb.LabelSet{
 					Labels: labels,
 				},
 				Samples: []*profilestorepb.RawSample{{
-					RawProfile: profile,
+					RawProfile: profileContent,
 				}},
 			}},
 			Normalized: flags.Normalized,

go.mod

@@ -4,6 +4,7 @@ go 1.19
 
 require (
 	github.com/alecthomas/kong v0.7.1
+	github.com/google/pprof v0.0.0-20221203041831-ce31453925ec
 	github.com/grpc-ecosystem/go-grpc-prometheus v1.2.0
 	github.com/oklog/run v1.1.0
 	github.com/parca-dev/parca v0.15.0

go.sum

@@ -15,6 +15,8 @@ github.com/golang/protobuf v1.5.2 h1:ROPKBNFfQgOUMifHyP+KYbvpjbdoFNs+aK7DXlji0Tw
 github.com/golang/protobuf v1.5.2/go.mod h1:XVQd3VNwM+JqD3oG2Ue2ip4fOMUkwXdXDdiuN0vRsmY=
 github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.9 h1:O2Tfq5qg4qc4AmwVlvv0oLiVAGB7enBSJ2x2DqQFi38=
+github.com/google/pprof v0.0.0-20221203041831-ce31453925ec h1:fR20TYVVwhK4O7r7y+McjRYyaTH6/vjwJOajE+XhlzM=
+github.com/google/pprof v0.0.0-20221203041831-ce31453925ec/go.mod h1:dDKJzRmX4S37WGHujM7tX//fmj1uioxKzKxz3lo4HJo=
 github.com/grpc-ecosystem/go-grpc-prometheus v1.2.0 h1:Ovs26xHkKqVztRpIrF/92BcuyuQ/YW4NSIpoGtfXNho=
 github.com/grpc-ecosystem/go-grpc-prometheus v1.2.0/go.mod h1:8NvIoxWQoOIhqOTXgfV/d3M/q6VIi02HzZEHgUlZvzk=
 github.com/grpc-ecosystem/grpc-gateway/v2 v2.14.0 h1:t7uX3JBHdVwAi3G7sSSdbsk8NfgA+LnUS88V/2EKaA0=