20348603794

Committed 18 Dec 2025 07:21PM UTC coverage: 49.888% (-0.2%) from 50.085%

Build # 20348603794

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 37 new or added lines in 4 files covered. (37.84%)

138 existing lines in 3 files now uncovered.

2662 of 5336 relevant lines covered (49.89%)

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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/tools/clientcmd"
        "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
        }

        // Try in-cluster config
        config, err := rest.InClusterConfig()
        if err == rest.ErrNotInCluster {
                // fall back to kubeconfig
                kubeconfig := os.Getenv("KUBECONFIG")
                if kubeconfig == "" {
                        kubeconfig = os.ExpandEnv("${HOME}/.kube/config")
                }
                return clientcmd.BuildConfigFromFlags("", kubeconfig)
        }
        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/tools/clientcmd"
23	"k8s.io/client-go/transport"
24	)
25
26	const (
27	defaultInterval = "10s"
28	defaultIngressSourceSwitchTTL = "5m"
29	defaultMetricsAddress = ":7979"
30	defaultClientGOTimeout = 30 * time.Second
31	defaultReconcileWorkers = "10"
32	)
33
34	var (
35	config struct {
36	Debug bool
37	Interval time.Duration
38	APIServer *url.URL
39	Namespace string
40	MetricsAddress string
41	ClusterDomains []string
42	NoTrafficScaledownTTL time.Duration
43	ControllerID string
44	BackendWeightsAnnotationKey string
45	RouteGroupSupportEnabled bool
46	SyncIngressAnnotations []string
47	ReconcileWorkers int
48	ConfigMapSupportEnabled bool
49	SecretSupportEnabled bool
50	PCSSupportEnabled bool
51	}
52	)
53
54	func main() {	×
55	kingpin.Flag("debug", "Enable debug logging.").BoolVar(&config.Debug)	×
56	kingpin.Flag("interval", "Interval between syncing stacksets.").	×
57	Default(defaultInterval).DurationVar(&config.Interval)	×
58	kingpin.Flag("apiserver", "API server url.").URLVar(&config.APIServer)	×
59	kingpin.Flag("namespace", "Limit scope to a particular namespace.").Default(corev1.NamespaceAll).StringVar(&config.Namespace)	×
60	kingpin.Flag("metrics-address", "defines where to serve metrics").Default(defaultMetricsAddress).StringVar(&config.MetricsAddress)	×
61	kingpin.Flag("controller-id", "ID of the controller used to determine ownership of StackSet resources").StringVar(&config.ControllerID)	×
62	kingpin.Flag("reconcile-workers", "The amount of stacksets to reconcile in parallel at a time.").	×
63	Default(defaultReconcileWorkers).IntVar(&config.ReconcileWorkers)	×
64	kingpin.Flag("backend-weights-key", "Backend weights annotation key the controller will use to set current traffic values").Default(traffic.DefaultBackendWeightsAnnotationKey).StringVar(&config.BackendWeightsAnnotationKey)	×
65	kingpin.Flag("cluster-domain", "Main domains of the cluster, used for generating Stack Ingress hostnames").Envar("CLUSTER_DOMAIN").Required().StringsVar(&config.ClusterDomains)	×
66	kingpin.Flag("enable-routegroup-support", "Enable support for RouteGroups on StackSets.").Default("false").BoolVar(&config.RouteGroupSupportEnabled)	×
67	kingpin.Flag(	×
68	"sync-ingress-annotation",	×
69	"Ingress/RouteGroup annotation to propagate to all traffic segments.",	×
70	).StringsVar(&config.SyncIngressAnnotations)	×
71	kingpin.Flag("enable-configmap-support", "Enable support for ConfigMaps on StackSets.").Default("false").BoolVar(&config.ConfigMapSupportEnabled)	×
72	kingpin.Flag("enable-secret-support", "Enable support for Secrets on StackSets.").Default("false").BoolVar(&config.SecretSupportEnabled)	×
73	kingpin.Flag("enable-pcs-support", "Enable support for PlatformCredentialsSet on StackSets.").Default("false").BoolVar(&config.PCSSupportEnabled)	×
74	kingpin.Parse()	×
75		×
76	if config.Debug {	×
77	log.SetLevel(log.DebugLevel)	×
78	}	×
79
UNCOV 80	stackSetConfig := controller.StackSetConfig{	×
81	Namespace: config.Namespace,	×
82	ControllerID: config.ControllerID,	×
83		×
84	ClusterDomains: config.ClusterDomains,	×
85	BackendWeightsAnnotationKey: config.BackendWeightsAnnotationKey,	×
86	SyncIngressAnnotations: config.SyncIngressAnnotations,	×
87		×
88	ReconcileWorkers: config.ReconcileWorkers,	×
89	Interval: config.Interval,	×
90		×
91	RouteGroupSupportEnabled: config.RouteGroupSupportEnabled,	×
92	ConfigMapSupportEnabled: config.ConfigMapSupportEnabled,	×
93	SecretSupportEnabled: config.SecretSupportEnabled,	×
94	PcsSupportEnabled: config.PCSSupportEnabled,	×
95	}	×
96		×
97	ctx, cancel := context.WithCancel(context.Background())	×
98	kubeConfig, err := configureKubeConfig(config.APIServer, defaultClientGOTimeout, ctx.Done())	×
99	if err != nil {	×
100	log.Fatalf("Failed to setup Kubernetes config: %v", err)	×
101	}	×
102
103	client, err := clientset.NewForConfig(kubeConfig)	×
UNCOV 104	if err != nil {	×
105	log.Fatalf("Failed to initialize Kubernetes client: %v", err)	×
106	}	×
107
108	controller, err := controller.NewStackSetController(	×
UNCOV 109	client,	×
110	prometheus.DefaultRegisterer,	×
111	stackSetConfig,	×
112	)	×
113	if err != nil {	×
114	log.Fatalf("Failed to create Stackset controller: %v", err)	×
115	}	×
116
117	go handleSigterm(cancel)	×
UNCOV 118	go serveMetrics(config.MetricsAddress)	×
119	err = controller.Run(ctx)	×
120	if err != nil {	×
121	cancel()	×
122	log.Fatalf("Failed to run controller: %v", err)	×
123	}	×
124	}
125
126	// handleSigterm handles SIGTERM signal sent to the process.
UNCOV 127	func handleSigterm(cancelFunc func()) {	×
UNCOV 128	signals := make(chan os.Signal, 1)	×
129	signal.Notify(signals, syscall.SIGTERM)	×
130	<-signals	×
131	log.Info("Received Term signal. Terminating...")	×
132	cancelFunc()	×
133	}	×
134
135	// configureKubeConfig configures a kubeconfig.
UNCOV 136	func configureKubeConfig(apiServerURL url.URL, timeout time.Duration, stopCh <-chan struct{}) (rest.Config, error) {	×
UNCOV 137	tr := &http.Transport{	×
138	DialContext: (&net.Dialer{	×
139	Timeout: timeout,	×
140	KeepAlive: 30 * time.Second,	×
141	DualStack: false, // K8s do not work well with IPv6	×
142	}).DialContext,	×
143	TLSHandshakeTimeout: timeout,	×
144	ResponseHeaderTimeout: 10 * time.Second,	×
145	MaxIdleConns: 10,	×
146	MaxIdleConnsPerHost: 2,	×
147	IdleConnTimeout: 20 * time.Second,	×
148	}	×
149		×
150	// We need this to reliably fade on DNS change, which is right	×
151	// now not fixed with IdleConnTimeout in the http.Transport.	×
152	// https://github.com/golang/go/issues/23427	×
153	go func(d time.Duration) {	×
154	for {	×
155	select {	×
156	case <-time.After(d):	×
157	tr.CloseIdleConnections()	×
158	case <-stopCh:	×
159	return	×
160	}
161	}
162	}(20 * time.Second)
163
UNCOV 164	if apiServerURL != nil {	×
UNCOV 165	return &rest.Config{	×
166	Host: apiServerURL.String(),	×
167	Timeout: timeout,	×
168	Transport: tr,	×
169	QPS: 100.0,	×
170	Burst: 500,	×
171	}, nil	×
172	}	×
173
174	// Try in-cluster config
UNCOV 175	config, err := rest.InClusterConfig()	×
NEW 176	if err == rest.ErrNotInCluster {	×
NEW 177	// fall back to kubeconfig	×
NEW 178	kubeconfig := os.Getenv("KUBECONFIG")	×
NEW 179	if kubeconfig == "" {	×
NEW UNCOV 180	kubeconfig = os.ExpandEnv("${HOME}/.kube/config")	×
NEW UNCOV 181	}	×
NEW 182	return clientcmd.BuildConfigFromFlags("", kubeconfig)	×
183	}
184	if err != nil {	×
185	return nil, err	×
186	}	×
187
188	// patch TLS config
189	restTransportConfig, err := config.TransportConfig()	×
190	if err != nil {	×
191	return nil, err	×
192	}	×
193	restTLSConfig, err := transport.TLSConfigFor(restTransportConfig)	×
194	if err != nil {	×
195	return nil, err	×
196	}	×
197	tr.TLSClientConfig = restTLSConfig	×
198		×
UNCOV 199	config.Timeout = timeout	×
UNCOV 200	config.Transport = tr	×
UNCOV 201	config.QPS = 100.0	×
202	config.Burst = 500	×
203	// disable TLSClientConfig to make the custom Transport work	×
204	config.TLSClientConfig = rest.TLSClientConfig{}	×
205	return config, nil	×
206	}
207
208	// gather go metrics
UNCOV 209	func serveMetrics(address string) {	×
UNCOV 210	http.Handle("/metrics", promhttp.Handler())	×
UNCOV 211	log.Fatal(http.ListenAndServe(address, nil))	×
UNCOV 212	}	×

zalando-incubator / stackset-controller / 20348603794

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