8738031909

Committed 19 Mar 2024 06:41PM UTC coverage: 51.212% (-0.9%) from 52.101%

Build # 8738031909

Build Type

Pull #593

github

Committed by

linki

Commit Message

some labels

Pull Request Pull Request #593: [2/3] Add Inline Solution for ConfigMaps

Run Details

5 of 143 new or added lines in 5 files covered. (3.5%)

766 existing lines in 14 files now uncovered.

3084 of 6022 relevant lines covered (51.21%)

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0.0

/cmd/stackset-controller/main.go

package main

import (
        "context"
        "fmt"
        "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
                TrafficSegmentsEnabled      bool
                AnnotatedTrafficSegments    bool
                SyncIngressAnnotations      []string
                IngressSourceSwitchTTL      time.Duration
                ReconcileWorkers            int
                ConfigMapSupportEnabled     bool
                SecretSupportEnabled        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(
                "enable-traffic-segments",
                "Support traffic segments by default. "+
                        "Ignored when also setting --annotated-traffic-segments.",
        ).Default("false").BoolVar(&config.TrafficSegmentsEnabled)
        kingpin.Flag(
                "annotated-traffic-segments",
                fmt.Sprintf(
                        "Support traffic segments annotated with %q.",
                        controller.TrafficSegmentsAnnotationKey,
                ),
        ).Default("false").BoolVar(&config.AnnotatedTrafficSegments)
        kingpin.Flag(
                "sync-ingress-annotation",
                "Ingress/RouteGroup annotation to propagate to all traffic segments.",
        ).StringsVar(&config.SyncIngressAnnotations)
        kingpin.Flag("ingress-source-switch-ttl", "The ttl before an ingress source is deleted when replaced with another one e.g. switching from RouteGroup to Ingress or vice versa.").
                Default(defaultIngressSourceSwitchTTL).DurationVar(&config.IngressSourceSwitchTTL)
        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.Parse()

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

        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,
                config.Namespace,
                config.ControllerID,
                config.ReconcileWorkers,
                config.BackendWeightsAnnotationKey,
                config.ClusterDomains,
                prometheus.DefaultRegisterer,
                config.Interval,
                config.RouteGroupSupportEnabled,
                config.TrafficSegmentsEnabled,
                config.AnnotatedTrafficSegments,
                config.SyncIngressAnnotations,
                config.ConfigMapSupportEnabled,
                config.SecretSupportEnabled,
                config.IngressSourceSwitchTTL,
        )
        if err != nil {
                log.Fatalf("Failed to create Stackset controller: %v", err)
        }

        go handleSigterm(cancel)
        go serveMetrics(config.MetricsAddress)
        controller.Run(ctx)
}

// 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	"fmt"
6	"net"
7	"net/http"
8	"net/url"
9	"os"
10	"os/signal"
11	"syscall"
12	"time"
13
14	"github.com/alecthomas/kingpin/v2"
15	"github.com/prometheus/client_golang/prometheus"
16	"github.com/prometheus/client_golang/prometheus/promhttp"
17	log "github.com/sirupsen/logrus"
18	"github.com/zalando-incubator/stackset-controller/controller"
19	"github.com/zalando-incubator/stackset-controller/pkg/clientset"
20	"github.com/zalando-incubator/stackset-controller/pkg/traffic"
21	corev1 "k8s.io/api/core/v1"
22	"k8s.io/client-go/rest"
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	TrafficSegmentsEnabled bool
47	AnnotatedTrafficSegments bool
48	SyncIngressAnnotations []string
49	IngressSourceSwitchTTL time.Duration
50	ReconcileWorkers int
51	ConfigMapSupportEnabled bool
52	SecretSupportEnabled bool
53	}
54	)
55
56	func main() {	×
57	kingpin.Flag("debug", "Enable debug logging.").BoolVar(&config.Debug)	×
58	kingpin.Flag("interval", "Interval between syncing stacksets.").	×
59	Default(defaultInterval).DurationVar(&config.Interval)	×
60	kingpin.Flag("apiserver", "API server url.").URLVar(&config.APIServer)	×
61	kingpin.Flag("namespace", "Limit scope to a particular namespace.").Default(corev1.NamespaceAll).StringVar(&config.Namespace)	×
62	kingpin.Flag("metrics-address", "defines where to serve metrics").Default(defaultMetricsAddress).StringVar(&config.MetricsAddress)	×
63	kingpin.Flag("controller-id", "ID of the controller used to determine ownership of StackSet resources").StringVar(&config.ControllerID)	×
64	kingpin.Flag("reconcile-workers", "The amount of stacksets to reconcile in parallel at a time.").	×
65	Default(defaultReconcileWorkers).IntVar(&config.ReconcileWorkers)	×
66	kingpin.Flag("backend-weights-key", "Backend weights annotation key the controller will use to set current traffic values").Default(traffic.DefaultBackendWeightsAnnotationKey).StringVar(&config.BackendWeightsAnnotationKey)	×
67	kingpin.Flag("cluster-domain", "Main domains of the cluster, used for generating Stack Ingress hostnames").Envar("CLUSTER_DOMAIN").Required().StringsVar(&config.ClusterDomains)	×
68	kingpin.Flag("enable-routegroup-support", "Enable support for RouteGroups on StackSets.").Default("false").BoolVar(&config.RouteGroupSupportEnabled)	×
69	kingpin.Flag(	×
70	"enable-traffic-segments",	×
71	"Support traffic segments by default. "+	×
72	"Ignored when also setting --annotated-traffic-segments.",	×
73	).Default("false").BoolVar(&config.TrafficSegmentsEnabled)	×
74	kingpin.Flag(	×
75	"annotated-traffic-segments",	×
76	fmt.Sprintf(	×
77	"Support traffic segments annotated with %q.",	×
UNCOV 78	controller.TrafficSegmentsAnnotationKey,	×
79	),	×
80	).Default("false").BoolVar(&config.AnnotatedTrafficSegments)	×
81	kingpin.Flag(	×
82	"sync-ingress-annotation",	×
83	"Ingress/RouteGroup annotation to propagate to all traffic segments.",	×
UNCOV 84	).StringsVar(&config.SyncIngressAnnotations)	×
85	kingpin.Flag("ingress-source-switch-ttl", "The ttl before an ingress source is deleted when replaced with another one e.g. switching from RouteGroup to Ingress or vice versa.").	×
86	Default(defaultIngressSourceSwitchTTL).DurationVar(&config.IngressSourceSwitchTTL)	×
87	kingpin.Flag("enable-configmap-support", "Enable support for ConfigMaps on StackSets.").Default("false").BoolVar(&config.ConfigMapSupportEnabled)	×
88	kingpin.Flag("enable-secret-support", "Enable support for Secrets on StackSets.").Default("false").BoolVar(&config.SecretSupportEnabled)	×
UNCOV 89	kingpin.Parse()	×
90		×
91	if config.Debug {	×
92	log.SetLevel(log.DebugLevel)	×
93	}	×
94
95	ctx, cancel := context.WithCancel(context.Background())	×
96	kubeConfig, err := configureKubeConfig(config.APIServer, defaultClientGOTimeout, ctx.Done())	×
97	if err != nil {	×
98	log.Fatalf("Failed to setup Kubernetes config: %v", err)	×
99	}	×
100
101	client, err := clientset.NewForConfig(kubeConfig)	×
102	if err != nil {	×
103	log.Fatalf("Failed to initialize Kubernetes client: %v", err)	×
104	}	×
105
106	controller, err := controller.NewStackSetController(	×
107	client,	×
UNCOV 108	config.Namespace,	×
109	config.ControllerID,	×
110	config.ReconcileWorkers,	×
111	config.BackendWeightsAnnotationKey,	×
112	config.ClusterDomains,	×
113	prometheus.DefaultRegisterer,	×
114	config.Interval,	×
115	config.RouteGroupSupportEnabled,	×
UNCOV 116	config.TrafficSegmentsEnabled,	×
UNCOV 117	config.AnnotatedTrafficSegments,	×
UNCOV 118	config.SyncIngressAnnotations,	×
119	config.ConfigMapSupportEnabled,	×
120	config.SecretSupportEnabled,	×
121	config.IngressSourceSwitchTTL,	×
122	)	×
123	if err != nil {	×
124	log.Fatalf("Failed to create Stackset controller: %v", err)	×
125	}	×
126
UNCOV 127	go handleSigterm(cancel)	×
128	go serveMetrics(config.MetricsAddress)	×
129	controller.Run(ctx)	×
130	}
131
132	// handleSigterm handles SIGTERM signal sent to the process.
133	func handleSigterm(cancelFunc func()) {	×
134	signals := make(chan os.Signal, 1)	×
135	signal.Notify(signals, syscall.SIGTERM)	×
136	<-signals	×
137	log.Info("Received Term signal. Terminating...")	×
138	cancelFunc()	×
139	}	×
140
141	// configureKubeConfig configures a kubeconfig.
142	func configureKubeConfig(apiServerURL url.URL, timeout time.Duration, stopCh <-chan struct{}) (rest.Config, error) {	×
143	tr := &http.Transport{	×
144	DialContext: (&net.Dialer{	×
145	Timeout: timeout,	×
146	KeepAlive: 30 * time.Second,	×
147	DualStack: false, // K8s do not work well with IPv6	×
148	}).DialContext,	×
149	TLSHandshakeTimeout: timeout,	×
150	ResponseHeaderTimeout: 10 * time.Second,	×
151	MaxIdleConns: 10,	×
UNCOV 152	MaxIdleConnsPerHost: 2,	×
UNCOV 153	IdleConnTimeout: 20 * time.Second,	×
UNCOV 154	}	×
UNCOV 155		×
156	// We need this to reliably fade on DNS change, which is right	×
157	// now not fixed with IdleConnTimeout in the http.Transport.	×
158	// https://github.com/golang/go/issues/23427	×
159	go func(d time.Duration) {	×
160	for {	×
161	select {	×
162	case <-time.After(d):	×
163	tr.CloseIdleConnections()	×
164	case <-stopCh:	×
UNCOV 165	return	×
166	}
167	}
168	}(20 * time.Second)
169
UNCOV 170	if apiServerURL != nil {	×
UNCOV 171	return &rest.Config{	×
172	Host: apiServerURL.String(),	×
173	Timeout: timeout,	×
174	Transport: tr,	×
175	QPS: 100.0,	×
176	Burst: 500,	×
177	}, nil	×
178	}	×
179
180	config, err := rest.InClusterConfig()	×
181	if err != nil {	×
182	return nil, err	×
183	}	×
184
185	// patch TLS config
186	restTransportConfig, err := config.TransportConfig()	×
187	if err != nil {	×
188	return nil, err	×
UNCOV 189	}	×
UNCOV 190	restTLSConfig, err := transport.TLSConfigFor(restTransportConfig)	×
UNCOV 191	if err != nil {	×
192	return nil, err	×
193	}	×
194	tr.TLSClientConfig = restTLSConfig	×
195		×
UNCOV 196	config.Timeout = timeout	×
UNCOV 197	config.Transport = tr	×
UNCOV 198	config.QPS = 100.0	×
UNCOV 199	config.Burst = 500	×
UNCOV 200	// disable TLSClientConfig to make the custom Transport work	×
UNCOV 201	config.TLSClientConfig = rest.TLSClientConfig{}	×
UNCOV 202	return config, nil	×
203	}
204
205	// gather go metrics
UNCOV 206	func serveMetrics(address string) {	×
UNCOV 207	http.Handle("/metrics", promhttp.Handler())	×
UNCOV 208	log.Fatal(http.ListenAndServe(address, nil))	×
UNCOV 209	}	×

zalando-incubator / stackset-controller / 8738031909

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