forked from kubevirt/ssp-operator
-
Notifications
You must be signed in to change notification settings - Fork 0
/
main.go
198 lines (165 loc) · 5.87 KB
/
main.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
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
/*
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 main
import (
"flag"
"fmt"
"io"
"net/http"
"os"
"path"
// Import all Kubernetes client auth plugins (e.g. Azure, GCP, OIDC, etc.)
// to ensure that exec-entrypoint and run can make use of them.
_ "k8s.io/client-go/plugin/pkg/client/auth"
common_templates "kubevirt.io/ssp-operator/internal/operands/common-templates"
ctrl "sigs.k8s.io/controller-runtime"
"sigs.k8s.io/controller-runtime/pkg/healthz"
"sigs.k8s.io/controller-runtime/pkg/log/zap"
"sigs.k8s.io/controller-runtime/pkg/metrics"
"github.com/prometheus/client_golang/prometheus/promhttp"
sspv1beta1 "kubevirt.io/ssp-operator/api/v1beta1"
"kubevirt.io/ssp-operator/controllers"
"kubevirt.io/ssp-operator/internal/common"
// +kubebuilder:scaffold:imports
)
var (
setupLog = ctrl.Log.WithName("setup")
// Default certificate directory operator-sdk expects to have
sdkTLSDir = fmt.Sprintf("%s/k8s-webhook-server/serving-certs", os.TempDir())
)
const (
// Do not change the leader election ID, otherwise multiple SSP operator instances
// can be running during upgrade.
leaderElectionID = "734f7229.kubevirt.io"
// Certificate directory and file names OLM mounts certificates to
olmTLSDir = "/apiserver.local.config/certificates"
olmTLSCrt = "apiserver.crt"
olmTLSKey = "apiserver.key"
// Default cert file names operator-sdk expects to have
sdkTLSCrt = "tls.crt"
sdkTLSKey = "tls.key"
)
func runPrometheusServer(metricsAddr string) {
setupLog.Info("Starting Prometheus metrics endpoint server with TLS")
metrics.Registry.MustRegister(common_templates.CommonTemplatesRestored)
handler := promhttp.HandlerFor(metrics.Registry, promhttp.HandlerOpts{})
mux := http.NewServeMux()
mux.Handle("/metrics", handler)
server := http.Server{
Addr: metricsAddr,
Handler: mux,
}
go func() {
err := server.ListenAndServeTLS(path.Join(sdkTLSDir, sdkTLSCrt), path.Join(sdkTLSDir, sdkTLSKey))
if err != nil {
setupLog.Error(err, "Failed to start Prometheus metrics endpoint server")
}
}()
}
func main() {
var metricsAddr string
var enableLeaderElection bool
var probeAddr string
flag.StringVar(&metricsAddr, "metrics-bind-address", ":8443", "The address the metric endpoint binds to.")
flag.StringVar(&probeAddr, "health-probe-bind-address", ":8081", "The address the probe endpoint binds to.")
flag.BoolVar(&enableLeaderElection, "leader-elect", false,
"Enable leader election for controller manager. "+
"Enabling this will ensure there is only one active controller manager.")
opts := zap.Options{
Development: true,
}
opts.BindFlags(flag.CommandLine)
flag.Parse()
ctrl.SetLogger(zap.New(zap.UseFlagOptions(&opts)))
err := copyCertificates()
if err != nil {
setupLog.Error(err, "Error copying certificates")
os.Exit(1)
}
runPrometheusServer(metricsAddr)
mgr, err := ctrl.NewManager(ctrl.GetConfigOrDie(), ctrl.Options{
Scheme: common.Scheme,
MetricsBindAddress: "0",
HealthProbeBindAddress: probeAddr,
Port: 9443,
LeaderElection: enableLeaderElection,
LeaderElectionID: leaderElectionID,
})
if err != nil {
setupLog.Error(err, "unable to start manager")
os.Exit(1)
}
if err = controllers.CreateAndSetupSspReconciler(mgr); err != nil {
setupLog.Error(err, "unable to create controller", "controller", "SSP")
os.Exit(1)
}
if os.Getenv("ENABLE_WEBHOOKS") != "false" {
if err = (&sspv1beta1.SSP{}).SetupWebhookWithManager(mgr); err != nil {
setupLog.Error(err, "unable to create webhook", "webhook", "SSP")
os.Exit(1)
}
}
if err := mgr.AddReadyzCheck("check", healthz.Ping); err != nil {
setupLog.Error(err, "unable to set up ready check")
os.Exit(1)
}
if err := mgr.AddHealthzCheck("health", healthz.Ping); err != nil {
setupLog.Error(err, "unable to set up health check")
os.Exit(1)
}
// +kubebuilder:scaffold:builder
setupLog.Info("starting manager")
if err := mgr.Start(ctrl.SetupSignalHandler()); err != nil {
setupLog.Error(err, "problem running manager")
os.Exit(1)
}
}
func copyCertificates() error {
olmDir, olmDirErr := os.Stat(olmTLSDir)
_, sdkDirErr := os.Stat(sdkTLSDir)
// If certificates are generated by OLM, we should use OLM certificates mount path
if olmDirErr == nil && olmDir.IsDir() && os.IsNotExist(sdkDirErr) {
// For some reason, OLM maps the cert/key files to apiserver.crt/apiserver.key
// instead of tls.crt/tls.key like the SDK expects, so copying those files to allow
// the operator to find and use them.
setupLog.Info("OLM cert directory found, copying cert files")
err := os.MkdirAll(sdkTLSDir, 0755)
if err != nil {
return fmt.Errorf("failed to create %s: %w", sdkTLSCrt, err)
}
err = copyFile(path.Join(olmTLSDir, olmTLSCrt), path.Join(sdkTLSDir, sdkTLSCrt))
if err != nil {
return fmt.Errorf("failed to copy %s/%s to %s/%s: %w", olmTLSDir, olmTLSCrt, sdkTLSDir, sdkTLSCrt, err)
}
err = copyFile(path.Join(olmTLSDir, olmTLSKey), path.Join(sdkTLSDir, sdkTLSKey))
if err != nil {
return fmt.Errorf("failed to copy %s/%s to %s/%s: %w", olmTLSDir, olmTLSKey, sdkTLSDir, sdkTLSKey, err)
}
} else {
setupLog.Info("OLM cert directory not found, using default")
}
return nil
}
func copyFile(src, dst string) error {
srcFile, err := os.Open(src)
if err != nil {
return err
}
defer srcFile.Close()
dstFile, err := os.Create(dst)
if err != nil {
return err
}
defer dstFile.Close()
_, err = io.Copy(dstFile, srcFile)
return err
}