20349054833

Committed 18 Dec 2025 07:36PM UTC coverage: 49.953% (-0.1%) from 50.085%

Build # 20349054833

Build Type

Pull #721

github

Committed by

mikkeloscar

Commit Message

Improve forward feature

Signed-off-by: Mikkel Oscar Lyderik Larsen <mikkel.larsen@zalando.de>

Pull Request Pull Request #721: Improve forward feature

Run Details

14 of 30 new or added lines in 3 files covered. (46.67%)

137 existing lines in 3 files now uncovered.

2662 of 5329 relevant lines covered (49.95%)

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0.0

/cmd/stackset-controller/main.go

package main

import (
        "context"
        "net"
        "net/http"
        "net/url"
        "os"
        "os/signal"
        "syscall"
        "time"

        "github.com/alecthomas/kingpin/v2"
        "github.com/prometheus/client_golang/prometheus"
        "github.com/prometheus/client_golang/prometheus/promhttp"
        log "github.com/sirupsen/logrus"
        "github.com/zalando-incubator/stackset-controller/controller"
        "github.com/zalando-incubator/stackset-controller/pkg/clientset"
        "github.com/zalando-incubator/stackset-controller/pkg/traffic"
        corev1 "k8s.io/api/core/v1"
        "k8s.io/client-go/rest"
        "k8s.io/client-go/transport"
)

const (
        defaultInterval               = "10s"
        defaultIngressSourceSwitchTTL = "5m"
        defaultMetricsAddress         = ":7979"
        defaultClientGOTimeout        = 30 * time.Second
        defaultReconcileWorkers       = "10"
)

var (
        config struct {
                Debug                       bool
                Interval                    time.Duration
                APIServer                   *url.URL
                Namespace                   string
                MetricsAddress              string
                ClusterDomains              []string
                NoTrafficScaledownTTL       time.Duration
                ControllerID                string
                BackendWeightsAnnotationKey string
                RouteGroupSupportEnabled    bool
                SyncIngressAnnotations      []string
                ReconcileWorkers            int
                ConfigMapSupportEnabled     bool
                SecretSupportEnabled        bool
                PCSSupportEnabled           bool
        }
)

func main() {
        kingpin.Flag("debug", "Enable debug logging.").BoolVar(&config.Debug)
        kingpin.Flag("interval", "Interval between syncing stacksets.").
                Default(defaultInterval).DurationVar(&config.Interval)
        kingpin.Flag("apiserver", "API server url.").URLVar(&config.APIServer)
        kingpin.Flag("namespace", "Limit scope to a particular namespace.").Default(corev1.NamespaceAll).StringVar(&config.Namespace)
        kingpin.Flag("metrics-address", "defines where to serve metrics").Default(defaultMetricsAddress).StringVar(&config.MetricsAddress)
        kingpin.Flag("controller-id", "ID of the controller used to determine ownership of StackSet resources").StringVar(&config.ControllerID)
        kingpin.Flag("reconcile-workers", "The amount of stacksets to reconcile in parallel at a time.").
                Default(defaultReconcileWorkers).IntVar(&config.ReconcileWorkers)
        kingpin.Flag("backend-weights-key", "Backend weights annotation key the controller will use to set current traffic values").Default(traffic.DefaultBackendWeightsAnnotationKey).StringVar(&config.BackendWeightsAnnotationKey)
        kingpin.Flag("cluster-domain", "Main domains of the cluster, used for generating Stack Ingress hostnames").Envar("CLUSTER_DOMAIN").Required().StringsVar(&config.ClusterDomains)
        kingpin.Flag("enable-routegroup-support", "Enable support for RouteGroups on StackSets.").Default("false").BoolVar(&config.RouteGroupSupportEnabled)
        kingpin.Flag(
                "sync-ingress-annotation",
                "Ingress/RouteGroup annotation to propagate to all traffic segments.",
        ).StringsVar(&config.SyncIngressAnnotations)
        kingpin.Flag("enable-configmap-support", "Enable support for ConfigMaps on StackSets.").Default("false").BoolVar(&config.ConfigMapSupportEnabled)
        kingpin.Flag("enable-secret-support", "Enable support for Secrets on StackSets.").Default("false").BoolVar(&config.SecretSupportEnabled)
        kingpin.Flag("enable-pcs-support", "Enable support for PlatformCredentialsSet on StackSets.").Default("false").BoolVar(&config.PCSSupportEnabled)
        kingpin.Parse()

        if config.Debug {
                log.SetLevel(log.DebugLevel)
        }

        stackSetConfig := controller.StackSetConfig{
                Namespace:    config.Namespace,
                ControllerID: config.ControllerID,

                ClusterDomains:              config.ClusterDomains,
                BackendWeightsAnnotationKey: config.BackendWeightsAnnotationKey,
                SyncIngressAnnotations:      config.SyncIngressAnnotations,

                ReconcileWorkers: config.ReconcileWorkers,
                Interval:         config.Interval,

                RouteGroupSupportEnabled: config.RouteGroupSupportEnabled,
                ConfigMapSupportEnabled:  config.ConfigMapSupportEnabled,
                SecretSupportEnabled:     config.SecretSupportEnabled,
                PcsSupportEnabled:        config.PCSSupportEnabled,
        }

        ctx, cancel := context.WithCancel(context.Background())
        kubeConfig, err := configureKubeConfig(config.APIServer, defaultClientGOTimeout, ctx.Done())
        if err != nil {
                log.Fatalf("Failed to setup Kubernetes config: %v", err)
        }

        client, err := clientset.NewForConfig(kubeConfig)
        if err != nil {
                log.Fatalf("Failed to initialize Kubernetes client: %v", err)
        }

        controller, err := controller.NewStackSetController(
                client,
                prometheus.DefaultRegisterer,
                stackSetConfig,
        )
        if err != nil {
                log.Fatalf("Failed to create Stackset controller: %v", err)
        }

        go handleSigterm(cancel)
        go serveMetrics(config.MetricsAddress)
        err = controller.Run(ctx)
        if err != nil {
                cancel()
                log.Fatalf("Failed to run controller: %v", err)
        }
}

// handleSigterm handles SIGTERM signal sent to the process.
func handleSigterm(cancelFunc func()) {
        signals := make(chan os.Signal, 1)
        signal.Notify(signals, syscall.SIGTERM)
        <-signals
        log.Info("Received Term signal. Terminating...")
        cancelFunc()
}

// configureKubeConfig configures a kubeconfig.
func configureKubeConfig(apiServerURL *url.URL, timeout time.Duration, stopCh <-chan struct{}) (*rest.Config, error) {
        tr := &http.Transport{
                DialContext: (&net.Dialer{
                        Timeout:   timeout,
                        KeepAlive: 30 * time.Second,
                        DualStack: false, // K8s do not work well with IPv6
                }).DialContext,
                TLSHandshakeTimeout:   timeout,
                ResponseHeaderTimeout: 10 * time.Second,
                MaxIdleConns:          10,
                MaxIdleConnsPerHost:   2,
                IdleConnTimeout:       20 * time.Second,
        }

        // We need this to reliably fade on DNS change, which is right
        // now not fixed with IdleConnTimeout in the http.Transport.
        // https://github.com/golang/go/issues/23427
        go func(d time.Duration) {
                for {
                        select {
                        case <-time.After(d):
                                tr.CloseIdleConnections()
                        case <-stopCh:
                                return
                        }
                }
        }(20 * time.Second)

        if apiServerURL != nil {
                return &rest.Config{
                        Host:      apiServerURL.String(),
                        Timeout:   timeout,
                        Transport: tr,
                        QPS:       100.0,
                        Burst:     500,
                }, nil
        }

        config, err := rest.InClusterConfig()
        if err != nil {
                return nil, err
        }

        // patch TLS config
        restTransportConfig, err := config.TransportConfig()
        if err != nil {
                return nil, err
        }
        restTLSConfig, err := transport.TLSConfigFor(restTransportConfig)
        if err != nil {
                return nil, err
        }
        tr.TLSClientConfig = restTLSConfig

        config.Timeout = timeout
        config.Transport = tr
        config.QPS = 100.0
        config.Burst = 500
        // disable TLSClientConfig to make the custom Transport work
        config.TLSClientConfig = rest.TLSClientConfig{}
        return config, nil
}

// gather go metrics
func serveMetrics(address string) {
        http.Handle("/metrics", promhttp.Handler())
        log.Fatal(http.ListenAndServe(address, nil))
}

1	package main
2
3	import (
4	"context"
5	"net"
6	"net/http"
7	"net/url"
8	"os"
9	"os/signal"
10	"syscall"
11	"time"
12
13	"github.com/alecthomas/kingpin/v2"
14	"github.com/prometheus/client_golang/prometheus"
15	"github.com/prometheus/client_golang/prometheus/promhttp"
16	log "github.com/sirupsen/logrus"
17	"github.com/zalando-incubator/stackset-controller/controller"
18	"github.com/zalando-incubator/stackset-controller/pkg/clientset"
19	"github.com/zalando-incubator/stackset-controller/pkg/traffic"
20	corev1 "k8s.io/api/core/v1"
21	"k8s.io/client-go/rest"
22	"k8s.io/client-go/transport"
23	)
24
25	const (
26	defaultInterval = "10s"
27	defaultIngressSourceSwitchTTL = "5m"
28	defaultMetricsAddress = ":7979"
29	defaultClientGOTimeout = 30 * time.Second
30	defaultReconcileWorkers = "10"
31	)
32
33	var (
34	config struct {
35	Debug bool
36	Interval time.Duration
37	APIServer *url.URL
38	Namespace string
39	MetricsAddress string
40	ClusterDomains []string
41	NoTrafficScaledownTTL time.Duration
42	ControllerID string
43	BackendWeightsAnnotationKey string
44	RouteGroupSupportEnabled bool
45	SyncIngressAnnotations []string
46	ReconcileWorkers int
47	ConfigMapSupportEnabled bool
48	SecretSupportEnabled bool
49	PCSSupportEnabled bool
50	}
51	)
52
UNCOV 53	func main() {	×
54	kingpin.Flag("debug", "Enable debug logging.").BoolVar(&config.Debug)	×
55	kingpin.Flag("interval", "Interval between syncing stacksets.").	×
56	Default(defaultInterval).DurationVar(&config.Interval)	×
57	kingpin.Flag("apiserver", "API server url.").URLVar(&config.APIServer)	×
58	kingpin.Flag("namespace", "Limit scope to a particular namespace.").Default(corev1.NamespaceAll).StringVar(&config.Namespace)	×
59	kingpin.Flag("metrics-address", "defines where to serve metrics").Default(defaultMetricsAddress).StringVar(&config.MetricsAddress)	×
60	kingpin.Flag("controller-id", "ID of the controller used to determine ownership of StackSet resources").StringVar(&config.ControllerID)	×
61	kingpin.Flag("reconcile-workers", "The amount of stacksets to reconcile in parallel at a time.").	×
62	Default(defaultReconcileWorkers).IntVar(&config.ReconcileWorkers)	×
63	kingpin.Flag("backend-weights-key", "Backend weights annotation key the controller will use to set current traffic values").Default(traffic.DefaultBackendWeightsAnnotationKey).StringVar(&config.BackendWeightsAnnotationKey)	×
64	kingpin.Flag("cluster-domain", "Main domains of the cluster, used for generating Stack Ingress hostnames").Envar("CLUSTER_DOMAIN").Required().StringsVar(&config.ClusterDomains)	×
65	kingpin.Flag("enable-routegroup-support", "Enable support for RouteGroups on StackSets.").Default("false").BoolVar(&config.RouteGroupSupportEnabled)	×
66	kingpin.Flag(	×
67	"sync-ingress-annotation",	×
68	"Ingress/RouteGroup annotation to propagate to all traffic segments.",	×
69	).StringsVar(&config.SyncIngressAnnotations)	×
70	kingpin.Flag("enable-configmap-support", "Enable support for ConfigMaps on StackSets.").Default("false").BoolVar(&config.ConfigMapSupportEnabled)	×
71	kingpin.Flag("enable-secret-support", "Enable support for Secrets on StackSets.").Default("false").BoolVar(&config.SecretSupportEnabled)	×
72	kingpin.Flag("enable-pcs-support", "Enable support for PlatformCredentialsSet on StackSets.").Default("false").BoolVar(&config.PCSSupportEnabled)	×
73	kingpin.Parse()	×
74		×
75	if config.Debug {	×
76	log.SetLevel(log.DebugLevel)	×
77	}	×
78
79	stackSetConfig := controller.StackSetConfig{	×
UNCOV 80	Namespace: config.Namespace,	×
81	ControllerID: config.ControllerID,	×
82		×
83	ClusterDomains: config.ClusterDomains,	×
84	BackendWeightsAnnotationKey: config.BackendWeightsAnnotationKey,	×
85	SyncIngressAnnotations: config.SyncIngressAnnotations,	×
86		×
87	ReconcileWorkers: config.ReconcileWorkers,	×
88	Interval: config.Interval,	×
89		×
90	RouteGroupSupportEnabled: config.RouteGroupSupportEnabled,	×
91	ConfigMapSupportEnabled: config.ConfigMapSupportEnabled,	×
92	SecretSupportEnabled: config.SecretSupportEnabled,	×
93	PcsSupportEnabled: config.PCSSupportEnabled,	×
94	}	×
95		×
96	ctx, cancel := context.WithCancel(context.Background())	×
97	kubeConfig, err := configureKubeConfig(config.APIServer, defaultClientGOTimeout, ctx.Done())	×
98	if err != nil {	×
99	log.Fatalf("Failed to setup Kubernetes config: %v", err)	×
100	}	×
101
102	client, err := clientset.NewForConfig(kubeConfig)	×
103	if err != nil {	×
UNCOV 104	log.Fatalf("Failed to initialize Kubernetes client: %v", err)	×
105	}	×
106
107	controller, err := controller.NewStackSetController(	×
108	client,	×
UNCOV 109	prometheus.DefaultRegisterer,	×
110	stackSetConfig,	×
111	)	×
112	if err != nil {	×
113	log.Fatalf("Failed to create Stackset controller: %v", err)	×
114	}	×
115
116	go handleSigterm(cancel)	×
117	go serveMetrics(config.MetricsAddress)	×
UNCOV 118	err = controller.Run(ctx)	×
119	if err != nil {	×
120	cancel()	×
121	log.Fatalf("Failed to run controller: %v", err)	×
122	}	×
123	}
124
125	// handleSigterm handles SIGTERM signal sent to the process.
UNCOV 126	func handleSigterm(cancelFunc func()) {	×
UNCOV 127	signals := make(chan os.Signal, 1)	×
UNCOV 128	signal.Notify(signals, syscall.SIGTERM)	×
129	<-signals	×
130	log.Info("Received Term signal. Terminating...")	×
131	cancelFunc()	×
132	}	×
133
134	// configureKubeConfig configures a kubeconfig.
135	func configureKubeConfig(apiServerURL url.URL, timeout time.Duration, stopCh <-chan struct{}) (rest.Config, error) {	×
UNCOV 136	tr := &http.Transport{	×
UNCOV 137	DialContext: (&net.Dialer{	×
138	Timeout: timeout,	×
139	KeepAlive: 30 * time.Second,	×
140	DualStack: false, // K8s do not work well with IPv6	×
141	}).DialContext,	×
142	TLSHandshakeTimeout: timeout,	×
143	ResponseHeaderTimeout: 10 * time.Second,	×
144	MaxIdleConns: 10,	×
145	MaxIdleConnsPerHost: 2,	×
146	IdleConnTimeout: 20 * time.Second,	×
147	}	×
148		×
149	// We need this to reliably fade on DNS change, which is right	×
150	// now not fixed with IdleConnTimeout in the http.Transport.	×
151	// https://github.com/golang/go/issues/23427	×
152	go func(d time.Duration) {	×
153	for {	×
154	select {	×
155	case <-time.After(d):	×
156	tr.CloseIdleConnections()	×
157	case <-stopCh:	×
158	return	×
159	}
160	}
161	}(20 * time.Second)
162
UNCOV 163	if apiServerURL != nil {	×
UNCOV 164	return &rest.Config{	×
UNCOV 165	Host: apiServerURL.String(),	×
166	Timeout: timeout,	×
167	Transport: tr,	×
168	QPS: 100.0,	×
169	Burst: 500,	×
170	}, nil	×
171	}	×
172
173	config, err := rest.InClusterConfig()	×
174	if err != nil {	×
UNCOV 175	return nil, err	×
176	}	×
177
178	// patch TLS config
179	restTransportConfig, err := config.TransportConfig()	×
UNCOV 180	if err != nil {	×
UNCOV 181	return nil, err	×
182	}	×
183	restTLSConfig, err := transport.TLSConfigFor(restTransportConfig)	×
184	if err != nil {	×
185	return nil, err	×
186	}	×
187	tr.TLSClientConfig = restTLSConfig	×
188		×
189	config.Timeout = timeout	×
190	config.Transport = tr	×
191	config.QPS = 100.0	×
192	config.Burst = 500	×
193	// disable TLSClientConfig to make the custom Transport work	×
194	config.TLSClientConfig = rest.TLSClientConfig{}	×
195	return config, nil	×
196	}
197
198	// gather go metrics
UNCOV 199	func serveMetrics(address string) {	×
UNCOV 200	http.Handle("/metrics", promhttp.Handler())	×
UNCOV 201	log.Fatal(http.ListenAndServe(address, nil))	×
202	}	×

zalando-incubator / stackset-controller / 20349054833

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