-
Notifications
You must be signed in to change notification settings - Fork 8
/
babysitter.go
131 lines (121 loc) · 4.12 KB
/
babysitter.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
// Copyright 2022 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package local
import (
"context"
"crypto"
"crypto/x509"
"fmt"
"log/slog"
"net"
"net/http"
"os"
"time"
"github.com/ServiceWeaver/weaver-gke/internal/babysitter"
"github.com/ServiceWeaver/weaver-gke/internal/config"
"github.com/ServiceWeaver/weaver-gke/internal/local/metricdb"
"github.com/ServiceWeaver/weaver-gke/internal/mtls"
"github.com/ServiceWeaver/weaver-gke/internal/nanny/manager"
"github.com/ServiceWeaver/weaver/runtime/logging"
"github.com/ServiceWeaver/weaver/runtime/metrics"
protos "github.com/ServiceWeaver/weaver/runtime/protos"
"github.com/ServiceWeaver/weaver/runtime/traces"
"github.com/google/uuid"
)
// startBabysitter creates and starts a babysitter in a gke-local deployment.
func startBabysitter(ctx context.Context, cfg *config.GKEConfig, s *Starter, replicaSet string, logDir string, caCert *x509.Certificate, caKey crypto.PrivateKey) (*babysitter.Babysitter, error) {
podName := uuid.New().String()
ls, err := logging.NewFileStore(logDir)
if err != nil {
return nil, fmt.Errorf("creating log store: %w", err)
}
defer ls.Close()
logSaver := ls.Add
logger := slog.New(&logging.LogHandler{
Opts: logging.Options{
App: cfg.Deployment.App.Name,
Deployment: cfg.Deployment.Id,
Component: "Babysitter",
Weavelet: podName,
Attrs: []string{"serviceweaver/system", ""},
},
Write: logSaver,
})
// Setup trace recording.
traceDB, err := traces.OpenDB(ctx, TracesFile)
if err != nil {
return nil, fmt.Errorf("cannot open Perfetto database: %w", err)
}
traceSaver := func(spans *protos.TraceSpans) error {
return traceDB.Store(ctx, cfg.Deployment.App.Name, cfg.Deployment.Id, spans)
}
// Setup metrics recording.
metricDB, err := metricdb.Open(ctx, MetricsFile)
if err != nil {
return nil, err
}
metricExporter := func(metrics []*metrics.MetricSnapshot) error {
now := time.Now()
for _, m := range metrics {
if err := metricDB.Record(ctx, m, now); err != nil {
return err
}
}
return nil
}
// Generate a self certificate, used by the weavelet to communicate with its
// peers, as well as the babysitter to communicate with the manager.
var selfCertPEM, selfKeyPEM []byte
selfIdentity, ok := cfg.ComponentIdentity[replicaSet]
if !ok { // should never happen
return nil, fmt.Errorf("unknown identity for replica set %q", replicaSet)
}
selfCert, selfKey, err := generateSignedCert(caCert, caKey, selfIdentity)
if err != nil {
return nil, fmt.Errorf("cannot generate self cert: %w", err)
}
selfCertPEM, selfKeyPEM, err = pemEncode(selfCert, selfKey)
if err != nil {
return nil, fmt.Errorf("cannot PEM-encode cert: %w", err)
}
getSelfCert := func() ([]byte, []byte, error) {
return selfCertPEM, selfKeyPEM, nil
}
// Connection to the manager.
m := &manager.HttpClient{
Addr: cfg.ManagerAddr,
Client: makeHttpClient(mtls.ClientTLSConfig(projectName, caCert, getSelfCert, "manager")),
}
mux := http.NewServeMux()
hostname, err := os.Hostname()
if err != nil {
return nil, err
}
lis, err := net.Listen("tcp", fmt.Sprintf("%s:0", hostname))
if err != nil {
return nil, err
}
selfAddr := fmt.Sprintf("https://%s", lis.Addr().String())
b, err := babysitter.Start(ctx, logger, cfg, replicaSet, projectName, podName, "localhost:0", mux, selfAddr, m, caCert, getSelfCert, logSaver, traceSaver, metricExporter)
if err != nil {
return nil, err
}
// Start the server without blocking.
server := &http.Server{
Handler: mux,
TLSConfig: mtls.ServerTLSConfig(projectName, caCert, getSelfCert, "manager", "distributor"),
}
go server.ServeTLS(lis, "", "")
return b, nil
}