k3s/pkg/util/api.go
Derek Nola bcb662926d
Secrets-encryption rotation (#4372)
* Regular CLI framework for encrypt commands
* New secrets-encryption feature
* New integration test
* fixes for flaky integration test CI
* Fix to bootstrap on restart of existing nodes
* Consolidate event recorder

Signed-off-by: Derek Nola <derek.nola@suse.com>
2021-12-07 14:31:32 -08:00

89 lines
3.0 KiB
Go

package util
import (
"context"
"fmt"
"net"
"net/http"
"os"
"strconv"
"time"
"github.com/pkg/errors"
"github.com/rancher/wrangler/pkg/merr"
"github.com/rancher/wrangler/pkg/schemes"
"github.com/sirupsen/logrus"
v1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/util/wait"
clientset "k8s.io/client-go/kubernetes"
coregetter "k8s.io/client-go/kubernetes/typed/core/v1"
"k8s.io/client-go/tools/record"
)
// This sets a default duration to wait for the apiserver to become ready. This is primarily used to
// block startup of agent supervisor controllers until the apiserver is ready to serve requests, in the
// same way that the apiReady channel is used in the server packages, so it can be fairly long. It must
// be at least long enough for downstream projects like RKE2 to start the apiserver in the background.
const DefaultAPIServerReadyTimeout = 15 * time.Minute
func GetAddresses(endpoint *v1.Endpoints) []string {
serverAddresses := []string{}
if endpoint == nil {
return serverAddresses
}
for _, subset := range endpoint.Subsets {
var port string
if len(subset.Ports) > 0 {
port = strconv.Itoa(int(subset.Ports[0].Port))
}
if port == "" {
port = "443"
}
for _, address := range subset.Addresses {
serverAddresses = append(serverAddresses, net.JoinHostPort(address.IP, port))
}
}
return serverAddresses
}
// WaitForAPIServerReady waits for the API Server's /readyz endpoint to report "ok" with timeout.
// This is modified from WaitForAPIServer from the Kubernetes controller-manager app, but checks the
// readyz endpoint instead of the deprecated healthz endpoint, and supports context.
func WaitForAPIServerReady(ctx context.Context, client clientset.Interface, timeout time.Duration) error {
var lastErr error
restClient := client.Discovery().RESTClient()
err := wait.PollImmediateWithContext(ctx, time.Second, timeout, func(ctx context.Context) (bool, error) {
healthStatus := 0
result := restClient.Get().AbsPath("/readyz").Do(ctx).StatusCode(&healthStatus)
if rerr := result.Error(); rerr != nil {
lastErr = errors.Wrap(rerr, "failed to get apiserver /readyz status")
return false, nil
}
if healthStatus != http.StatusOK {
content, _ := result.Raw()
lastErr = fmt.Errorf("APIServer isn't ready: %v", string(content))
logrus.Warnf("APIServer isn't ready yet: %v. Waiting a little while.", string(content))
return false, nil
}
return true, nil
})
if err != nil {
return merr.NewErrors(err, lastErr)
}
return nil
}
func BuildControllerEventRecorder(k8s clientset.Interface, controllerName string) record.EventRecorder {
logrus.Infof("Creating %s event broadcaster", controllerName)
eventBroadcaster := record.NewBroadcaster()
eventBroadcaster.StartLogging(logrus.Infof)
eventBroadcaster.StartRecordingToSink(&coregetter.EventSinkImpl{Interface: k8s.CoreV1().Events(metav1.NamespaceSystem)})
nodeName := os.Getenv("NODE_NAME")
return eventBroadcaster.NewRecorder(schemes.All, v1.EventSource{Component: controllerName, Host: nodeName})
}