-
Notifications
You must be signed in to change notification settings - Fork 129
/
kube.go
395 lines (353 loc) · 13.4 KB
/
kube.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
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
package util
import (
"fmt"
"os"
"path/filepath"
"runtime"
"strings"
kapi "k8s.io/api/core/v1"
discovery "k8s.io/api/discovery/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
k8sruntime "k8s.io/apimachinery/pkg/runtime"
k8stypes "k8s.io/apimachinery/pkg/types"
"k8s.io/apimachinery/pkg/util/sets"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/kubernetes/scheme"
typedcorev1 "k8s.io/client-go/kubernetes/typed/core/v1"
"k8s.io/client-go/pkg/version"
"k8s.io/client-go/rest"
"k8s.io/client-go/tools/clientcmd"
"k8s.io/client-go/tools/record"
"k8s.io/client-go/util/cert"
"k8s.io/klog/v2"
utilnet "k8s.io/utils/net"
egressfirewallclientset "github.com/ovn-org/ovn-kubernetes/go-controller/pkg/crd/egressfirewall/v1/apis/clientset/versioned"
egressipclientset "github.com/ovn-org/ovn-kubernetes/go-controller/pkg/crd/egressip/v1/apis/clientset/versioned"
egressqosclientset "github.com/ovn-org/ovn-kubernetes/go-controller/pkg/crd/egressqos/v1/apis/clientset/versioned"
"github.com/ovn-org/ovn-kubernetes/go-controller/pkg/types"
ocpcloudnetworkclientset "github.com/openshift/client-go/cloudnetwork/clientset/versioned"
"github.com/ovn-org/ovn-kubernetes/go-controller/pkg/config"
)
// OVNClientset is a wrapper around all clientsets used by OVN-Kubernetes
type OVNClientset struct {
KubeClient kubernetes.Interface
EgressIPClient egressipclientset.Interface
EgressFirewallClient egressfirewallclientset.Interface
CloudNetworkClient ocpcloudnetworkclientset.Interface
EgressQoSClient egressqosclientset.Interface
}
func adjustCommit() string {
if len(config.Commit) < 12 {
return "unknown"
}
return config.Commit[:12]
}
func adjustNodeName() string {
hostName, err := os.Hostname()
if err != nil {
hostName = "unknown"
}
return hostName
}
// newKubernetesRestConfig create a Kubernetes rest config from either a kubeconfig,
// TLS properties, or an apiserver URL. If the CA certificate data is passed in the
// CAData in the KubernetesConfig, the CACert path is ignored.
func newKubernetesRestConfig(conf *config.KubernetesConfig) (*rest.Config, error) {
var kconfig *rest.Config
var err error
if conf.Kubeconfig != "" {
// uses the current context in kubeconfig
kconfig, err = clientcmd.BuildConfigFromFlags("", conf.Kubeconfig)
} else if strings.HasPrefix(conf.APIServer, "https") {
if conf.Token == "" || len(conf.CAData) == 0 {
return nil, fmt.Errorf("TLS-secured apiservers require token and CA certificate")
}
if _, err := cert.NewPoolFromBytes(conf.CAData); err != nil {
return nil, err
}
kconfig = &rest.Config{
Host: conf.APIServer,
BearerToken: conf.Token,
BearerTokenFile: conf.TokenFile,
TLSClientConfig: rest.TLSClientConfig{CAData: conf.CAData},
}
} else if strings.HasPrefix(conf.APIServer, "http") {
kconfig, err = clientcmd.BuildConfigFromFlags(conf.APIServer, "")
} else {
// Assume we are running from a container managed by kubernetes
// and read the apiserver address and tokens from the
// container's environment.
kconfig, err = rest.InClusterConfig()
}
if err != nil {
return nil, err
}
kconfig.QPS = 50
kconfig.Burst = 50
// if all the clients are behind HA-Proxy, then on the K8s API server side we only
// see the HAProxy's IP and we can't tell the actual client making the request.
kconfig.UserAgent = fmt.Sprintf("%s/%s@%s (%s/%s) kubernetes/%s",
adjustNodeName(), filepath.Base(os.Args[0]), adjustCommit(), runtime.GOOS, runtime.GOARCH,
version.Get().GitVersion)
return kconfig, nil
}
// NewKubernetesClientset creates a Kubernetes clientset from a KubernetesConfig
func NewKubernetesClientset(conf *config.KubernetesConfig) (*kubernetes.Clientset, error) {
kconfig, err := newKubernetesRestConfig(conf)
if err != nil {
return nil, fmt.Errorf("unable to create kubernetes rest config, err: %v", err)
}
kconfig.AcceptContentTypes = "application/vnd.kubernetes.protobuf,application/json"
kconfig.ContentType = "application/vnd.kubernetes.protobuf"
clientset, err := kubernetes.NewForConfig(kconfig)
if err != nil {
return nil, err
}
return clientset, nil
}
// NewOVNClientset creates a OVNClientset from a KubernetesConfig
func NewOVNClientset(conf *config.KubernetesConfig) (*OVNClientset, error) {
kclientset, err := NewKubernetesClientset(conf)
if err != nil {
return nil, err
}
kconfig, err := newKubernetesRestConfig(conf)
if err != nil {
return nil, fmt.Errorf("unable to create kubernetes rest config, err: %v", err)
}
egressFirewallClientset, err := egressfirewallclientset.NewForConfig(kconfig)
if err != nil {
return nil, err
}
egressIPClientset, err := egressipclientset.NewForConfig(kconfig)
if err != nil {
return nil, err
}
cloudNetworkClientset, err := ocpcloudnetworkclientset.NewForConfig(kconfig)
if err != nil {
return nil, err
}
egressqosClientset, err := egressqosclientset.NewForConfig(kconfig)
if err != nil {
return nil, err
}
return &OVNClientset{
KubeClient: kclientset,
EgressIPClient: egressIPClientset,
EgressFirewallClient: egressFirewallClientset,
CloudNetworkClient: cloudNetworkClientset,
EgressQoSClient: egressqosClientset,
}, nil
}
// IsClusterIPSet checks if the service is an headless service or not
func IsClusterIPSet(service *kapi.Service) bool {
return service.Spec.ClusterIP != kapi.ClusterIPNone && service.Spec.ClusterIP != ""
}
// GetClusterIPs return an array with the ClusterIPs present in the service
// for backward compatibility with versions < 1.20
// we need to handle the case where only ClusterIP exist
func GetClusterIPs(service *kapi.Service) []string {
if len(service.Spec.ClusterIPs) > 0 {
clusterIPs := []string{}
for _, clusterIP := range service.Spec.ClusterIPs {
clusterIPs = append(clusterIPs, utilnet.ParseIPSloppy(clusterIP).String())
}
return clusterIPs
}
if len(service.Spec.ClusterIP) > 0 && service.Spec.ClusterIP != kapi.ClusterIPNone {
return []string{utilnet.ParseIPSloppy(service.Spec.ClusterIP).String()}
}
return []string{}
}
// GetExternalAndLBIPs returns an array with the ExternalIPs and LoadBalancer IPs present in the service
func GetExternalAndLBIPs(service *kapi.Service) []string {
svcVIPs := []string{}
for _, externalIP := range service.Spec.ExternalIPs {
parsedExternalIP := utilnet.ParseIPSloppy(externalIP)
if parsedExternalIP != nil {
svcVIPs = append(svcVIPs, parsedExternalIP.String())
}
}
if ServiceTypeHasLoadBalancer(service) {
for _, ingressVIP := range service.Status.LoadBalancer.Ingress {
if len(ingressVIP.IP) > 0 {
parsedIngressVIP := utilnet.ParseIPSloppy(ingressVIP.IP)
if parsedIngressVIP != nil {
svcVIPs = append(svcVIPs, parsedIngressVIP.String())
}
}
}
}
return svcVIPs
}
// ValidatePort checks if the port is non-zero and port protocol is valid
func ValidatePort(proto kapi.Protocol, port int32) error {
if port <= 0 || port > 65535 {
return fmt.Errorf("invalid port number: %v", port)
}
return ValidateProtocol(proto)
}
// ValidateProtocol checks if the protocol is a valid kapi.Protocol type (TCP, UDP, or SCTP) or returns an error
func ValidateProtocol(proto kapi.Protocol) error {
if proto == kapi.ProtocolTCP || proto == kapi.ProtocolUDP || proto == kapi.ProtocolSCTP {
return nil
}
return fmt.Errorf("protocol %s is not a valid protocol", proto)
}
// ServiceTypeHasClusterIP checks if the service has an associated ClusterIP or not
func ServiceTypeHasClusterIP(service *kapi.Service) bool {
return service.Spec.Type == kapi.ServiceTypeClusterIP || service.Spec.Type == kapi.ServiceTypeNodePort || service.Spec.Type == kapi.ServiceTypeLoadBalancer
}
// ServiceTypeHasNodePort checks if the service has an associated NodePort or not
func ServiceTypeHasNodePort(service *kapi.Service) bool {
return service.Spec.Type == kapi.ServiceTypeNodePort || service.Spec.Type == kapi.ServiceTypeLoadBalancer
}
// ServiceTypeHasLoadBalancer checks if the service has an associated LoadBalancer or not
func ServiceTypeHasLoadBalancer(service *kapi.Service) bool {
return service.Spec.Type == kapi.ServiceTypeLoadBalancer
}
func ServiceExternalTrafficPolicyLocal(service *kapi.Service) bool {
return service.Spec.ExternalTrafficPolicy == kapi.ServiceExternalTrafficPolicyTypeLocal
}
func ServiceInternalTrafficPolicyLocal(service *kapi.Service) bool {
return service.Spec.InternalTrafficPolicy != nil && *service.Spec.InternalTrafficPolicy == kapi.ServiceInternalTrafficPolicyLocal
}
// GetNodePrimaryIP extracts the primary IP address from the node status in the API
func GetNodePrimaryIP(node *kapi.Node) (string, error) {
if node == nil {
return "", fmt.Errorf("invalid node object")
}
for _, addr := range node.Status.Addresses {
if addr.Type == kapi.NodeInternalIP {
return utilnet.ParseIPSloppy(addr.Address).String(), nil
}
}
for _, addr := range node.Status.Addresses {
if addr.Type == kapi.NodeExternalIP {
return utilnet.ParseIPSloppy(addr.Address).String(), nil
}
}
return "", fmt.Errorf("%s doesn't have an address with type %s or %s", node.GetName(),
kapi.NodeInternalIP, kapi.NodeExternalIP)
}
// PodWantsNetwork returns if the given pod is hostNetworked or not to determine if networking
// needs to be setup
func PodWantsNetwork(pod *kapi.Pod) bool {
return !pod.Spec.HostNetwork
}
// PodCompleted checks if the pod is marked as completed (in a terminal state)
func PodCompleted(pod *kapi.Pod) bool {
return pod.Status.Phase == kapi.PodSucceeded || pod.Status.Phase == kapi.PodFailed
}
// PodScheduled returns if the given pod is scheduled
func PodScheduled(pod *kapi.Pod) bool {
return pod.Spec.NodeName != ""
}
// PodTerminating checks if the pod has been deleted via API but still in the process of terminating
func PodTerminating(pod *kapi.Pod) bool {
return pod.DeletionTimestamp != nil
}
// EventRecorder returns an EventRecorder type that can be
// used to post Events to different object's lifecycles.
func EventRecorder(kubeClient kubernetes.Interface) record.EventRecorder {
eventBroadcaster := record.NewBroadcaster()
eventBroadcaster.StartLogging(klog.Infof)
eventBroadcaster.StartRecordingToSink(
&typedcorev1.EventSinkImpl{
Interface: kubeClient.CoreV1().Events(""),
})
recorder := eventBroadcaster.NewRecorder(
scheme.Scheme,
kapi.EventSource{Component: "controlplane"})
return recorder
}
// UseEndpointSlices detect if Endpoints Slices are enabled in the cluster
func UseEndpointSlices(kubeClient kubernetes.Interface) bool {
if _, err := kubeClient.Discovery().ServerResourcesForGroupVersion(discovery.SchemeGroupVersion.String()); err == nil {
klog.V(2).Infof("Kubernetes Endpoint Slices enabled on the cluster: %s", discovery.SchemeGroupVersion.String())
return true
}
return false
}
type LbEndpoints struct {
V4IPs []string
V6IPs []string
Port int32
}
// GetLbEndpoints returns the IPv4 and IPv6 addresses of valid endpoints as slices inside a struct
func GetLbEndpoints(slices []*discovery.EndpointSlice, svcPort kapi.ServicePort, includeTerminating bool) LbEndpoints {
v4ips := sets.NewString()
v6ips := sets.NewString()
out := LbEndpoints{}
// return an empty object so the caller doesn't have to check for nil and can use it as an iterator
if len(slices) == 0 {
return out
}
for _, slice := range slices {
klog.V(4).Infof("Getting endpoints for slice %s/%s", slice.Namespace, slice.Name)
// build the list of valid endpoints in the slice
for _, port := range slice.Ports {
// If Service port name is set, it must match the name field in the endpoint
// If Service port name is not set, we just use the endpoint port
if svcPort.Name != "" && svcPort.Name != *port.Name {
klog.V(5).Infof("Slice %s with different Port name, requested: %s received: %s",
slice.Name, svcPort.Name, *port.Name)
continue
}
// Skip ports that don't match the protocol
if *port.Protocol != svcPort.Protocol {
klog.V(5).Infof("Slice %s with different Port protocol, requested: %s received: %s",
slice.Name, svcPort.Protocol, *port.Protocol)
continue
}
out.Port = *port.Port
for _, endpoint := range slice.Endpoints {
// Skip endpoint if it's not valid
if !IsEndpointValid(endpoint, includeTerminating) {
klog.V(4).Infof("Slice endpoint not valid")
continue
}
for _, ip := range endpoint.Addresses {
klog.V(4).Infof("Adding slice %s endpoint: %v, port: %d", slice.Name, endpoint.Addresses, *port.Port)
ipStr := utilnet.ParseIPSloppy(ip).String()
switch slice.AddressType {
case discovery.AddressTypeIPv4:
v4ips.Insert(ipStr)
case discovery.AddressTypeIPv6:
v6ips.Insert(ipStr)
default:
klog.V(5).Infof("Skipping FQDN slice %s/%s", slice.Namespace, slice.Name)
}
}
}
}
}
out.V4IPs = v4ips.List()
out.V6IPs = v6ips.List()
klog.V(4).Infof("LB Endpoints for %s/%s are: %v / %v on port: %d",
slices[0].Namespace, slices[0].Labels[discovery.LabelServiceName],
out.V4IPs, out.V6IPs, out.Port)
return out
}
type K8sObject interface {
metav1.Object
k8sruntime.Object
}
func ExternalIDsForObject(obj K8sObject) map[string]string {
gk := obj.GetObjectKind().GroupVersionKind().GroupKind()
nsn := k8stypes.NamespacedName{
Namespace: obj.GetNamespace(),
Name: obj.GetName(),
}
if gk.String() == "" {
kinds, _, err := scheme.Scheme.ObjectKinds(obj)
if err != nil || len(kinds) == 0 || len(kinds) > 1 {
klog.Warningf("BUG: object has no / ambiguous GVK: %#v, err", obj, err)
}
gk = kinds[0].GroupKind()
}
return map[string]string{
types.OvnK8sPrefix + "/owner": nsn.String(),
types.OvnK8sPrefix + "/kind": gk.String(),
}
}