Repository navigation
Expand file tree
/
Copy pathmain.go
More file actions
146 lines (121 loc) · 4.97 KB
/
Copy pathmain.go
File metadata and controls
146 lines (121 loc) · 4.97 KB
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
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
package main
import (
"context"
"flag"
"net"
"os"
"os/signal"
"regexp"
"syscall"
"time"
"github.com/linkerd/linkerd2/pkg/config"
"github.com/linkerd/linkerd2/pkg/admin"
"github.com/linkerd/linkerd2/pkg/charts/linkerd2"
"github.com/linkerd/linkerd2/pkg/flags"
"github.com/linkerd/linkerd2/pkg/healthcheck"
"github.com/linkerd/linkerd2/pkg/k8s"
"github.com/linkerd/linkerd2/pkg/trace"
"github.com/linkerd/linkerd2/viz/metrics-api/client"
"github.com/linkerd/linkerd2/web/srv"
log "github.com/sirupsen/logrus"
)
func main() {
cmd := flag.NewFlagSet("public-api", flag.ExitOnError)
addr := cmd.String("addr", ":8084", "address to serve on")
metricsAddr := cmd.String("metrics-addr", ":9994", "address to serve scrapable metrics on")
vizAPIAddr := cmd.String("linkerd-metrics-api-addr", "127.0.0.1:8085", "address of the linkerd-metrics-api service")
grafanaAddr := cmd.String("grafana-addr", "", "address of the linkerd-grafana service")
grafanaExternalAddr := cmd.String("grafana-external-addr", "", "address of the external grafana service")
grafanaPrefix := cmd.String("grafana-prefix", "", "prefix for Grafana dashboard UID's")
jaegerAddr := cmd.String("jaeger-addr", "", "address of the jaeger service")
templateDir := cmd.String("template-dir", "templates", "directory to search for template files")
staticDir := cmd.String("static-dir", "app/dist", "directory to search for static files")
reload := cmd.Bool("reload", true, "reloading set to true or false")
controllerNamespace := cmd.String("controller-namespace", "linkerd", "namespace in which Linkerd is installed")
enforcedHost := cmd.String("enforced-host", "", "regexp describing the allowed values for the Host header; protects from DNS-rebinding attacks")
kubeConfigPath := cmd.String("kubeconfig", "", "path to kube config")
clusterDomain := cmd.String("cluster-domain", "", "kubernetes cluster domain")
enablePprof := cmd.Bool("enable-pprof", false, "Enable pprof endpoints on the admin server")
traceCollector := flags.AddTraceFlags(cmd)
flags.ConfigureAndParse(cmd, os.Args[1:])
ctx := context.Background()
_, _, err := net.SplitHostPort(*vizAPIAddr) // Verify vizAPIAddr is of the form host:port.
if err != nil {
log.Fatalf("failed to parse metrics API server address: %s", *vizAPIAddr)
}
client, err := client.NewInternalClient(*vizAPIAddr)
if err != nil {
log.Fatalf("failed to construct client for viz API server URL %s", *vizAPIAddr)
}
if *clusterDomain == "" {
*clusterDomain = "cluster.local"
log.Warnf("expected cluster domain through args (falling back to %s)", *clusterDomain)
}
k8sAPI, err := k8s.NewAPI(*kubeConfigPath, "", "", [
7EAE
]string{}, 0)
if err != nil {
log.Fatalf("failed to construct Kubernetes API client: [%s]", err)
}
// Setup health checker
checks := []healthcheck.CategoryID{
healthcheck.KubernetesAPIChecks,
healthcheck.KubernetesVersionChecks,
healthcheck.LinkerdConfigChecks,
healthcheck.LinkerdControlPlaneExistenceChecks,
healthcheck.LinkerdVersionChecks,
healthcheck.LinkerdControlPlaneVersionChecks,
}
hc := healthcheck.NewHealthChecker(checks, &healthcheck.Options{
ControlPlaneNamespace: *controllerNamespace,
KubeConfig: *kubeConfigPath,
})
uuid, version := getUUIDAndVersion(ctx, k8sAPI, *controllerNamespace)
stop := make(chan os.Signal, 1)
signal.Notify(stop, os.Interrupt, syscall.SIGTERM)
if *traceCollector != "" {
if err := trace.InitializeTracing("web", *traceCollector); err != nil {
log.Warnf("failed to initialize tracing: %s", err)
}
}
reHost, err := regexp.Compile(*enforcedHost)
if err != nil {
log.Fatalf("invalid --enforced-host parameter: %s", err)
}
server := srv.NewServer(*addr, *grafanaAddr, *grafanaExternalAddr, *grafanaPrefix, *jaegerAddr, *templateDir, *staticDir, uuid, version,
*controllerNamespace, *clusterDomain, *reload, reHost, client, k8sAPI, hc)
go func() {
log.Infof("starting HTTP server on %+v", *addr)
if err := server.ListenAndServe(); err != nil {
log.Errorf("failed to start web HTTP server: %s", err)
}
}()
adminServer := admin.NewServer(*metricsAddr, *enablePprof)
go func() {
log.Infof("starting admin server on %s", *metricsAddr)
if err := adminServer.ListenAndServe(); err != nil {
log.Errorf("failed to start web admin server: %s", err)
}
}()
<-stop
log.Infof("shutting down HTTP server on %+v", *addr)
ctx, cancel := context.WithTimeout(ctx, 5*time.Second)
defer cancel()
server.Shutdown(ctx)
adminServer.Shutdown(ctx)
}
func getUUIDAndVersion(ctx context.Context, k8sAPI *k8s.KubernetesAPI, controllerNamespace string) (string, string) {
var uuid string
var version string
cm, err := config.FetchLinkerdConfigMap(ctx, k8sAPI, controllerNamespace)
if err != nil {
log.Errorf("Failed to fetch linkerd-config: %s", err)
} else {
uuid = string(cm.GetUID())
values, err := linkerd2.ValuesFromConfigMap(cm)
if err != nil {
log.Errorf("failed to load values from linkerd-config: %s", err)
} else {
version = values.LinkerdVersion
}
}
return uuid, version
}