/
main.go
179 lines (144 loc) · 4.65 KB
/
main.go
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package main
import (
"context"
"encoding/json"
"fmt"
"github.com/cert-manager/cert-manager/pkg/acme/webhook"
"github.com/pkg/errors"
"github.com/xzycn/cert-manager-webhook-huawei/huawei"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/client-go/kubernetes"
"k8s.io/klog/v2"
"os"
"sync"
extapi "k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1"
"k8s.io/client-go/rest"
"github.com/cert-manager/cert-manager/pkg/acme/webhook/apis/acme/v1alpha1"
"github.com/cert-manager/cert-manager/pkg/acme/webhook/cmd"
cmmetav1 "github.com/cert-manager/cert-manager/pkg/apis/meta/v1"
)
var GroupName = os.Getenv("GROUP_NAME")
func main() {
if GroupName == "" {
klog.Fatal("GROUP_NAME must be specified")
}
cmd.RunWebhookServer(GroupName, NewSolver())
}
func NewSolver() webhook.Solver {
return &huaweiDNSProviderSolver{}
}
type huaweiDNSProviderSolver struct {
client *kubernetes.Clientset
name string
dnsClients map[string]*huawei.Client
sync.RWMutex
}
type huaweiDNSProviderConfig struct {
Region string `json:"region"`
ZoneID string `json:"zoneID"`
AccessKeySecretRef cmmetav1.SecretKeySelector `json:"accessKeySecretRef"`
SecretKeySecretRef cmmetav1.SecretKeySelector `json:"secretKeySecretRef"`
}
func (h *huaweiDNSProviderSolver) Name() string {
return "huawei"
}
func (h *huaweiDNSProviderSolver) Present(ch *v1alpha1.ChallengeRequest) error {
ch.Key = fmt.Sprintf("%q", ch.Key)
klog.Infof("start to present TXT record(value: %s): %v %v", ch.ResolvedFQDN, ch.ResolvedZone, ch.Key)
cfg, err := loadConfig(ch.Config)
if err != nil {
return err
}
klog.Infof("Decoded configuration %v", cfg)
dnsClient, err := h.getDNSClient(cfg, ch)
if err != nil {
klog.Errorf("failed to get dns client: %v", err)
return err
}
err = dnsClient.CreateTXTRecord(ch, cfg.ZoneID)
if err != nil {
klog.Errorf("failed to add TXT record: %v", err)
return err
}
klog.Infof("complete presenting TXT record %v %v", ch.ResolvedFQDN, ch.ResolvedZone)
return nil
}
func (h *huaweiDNSProviderSolver) CleanUp(ch *v1alpha1.ChallengeRequest) error {
ch.Key = fmt.Sprintf("%q", ch.Key)
klog.Infof("start to clean TXT record(value: %s): %v %v", ch.ResolvedFQDN, ch.ResolvedZone, ch.Key)
cfg, err := loadConfig(ch.Config)
if err != nil {
return err
}
klog.Infof("Decoded configuration %v", cfg)
dnsClient, err := h.getDNSClient(cfg, ch)
if err != nil {
klog.Errorf("failed to get dns client: %v", err)
return err
}
record, err := dnsClient.GetTXTRecord(ch)
if err != nil {
klog.Errorf("failed to get TXT record: %v", err)
return err
}
err = dnsClient.DeleteTXTRecord(record)
if err != nil {
klog.Errorf("failed to delete TXT record: %v", err)
return err
}
klog.Infof("complete cleaning relevant TXT record %v %v", ch.ResolvedFQDN, ch.ResolvedZone)
return nil
}
func (h *huaweiDNSProviderSolver) Initialize(kubeClientConfig *rest.Config, stopCh <-chan struct{}) error {
cl, err := kubernetes.NewForConfig(kubeClientConfig)
if err != nil {
return err
}
h.client = cl
h.dnsClients = make(map[string]*huawei.Client)
return nil
}
func loadConfig(cfgJSON *extapi.JSON) (*huaweiDNSProviderConfig, error) {
cfg := &huaweiDNSProviderConfig{}
if cfgJSON == nil {
return cfg, nil
}
if err := json.Unmarshal(cfgJSON.Raw, cfg); err != nil {
return cfg, fmt.Errorf("error decoding solver config: %v", err)
}
return cfg, nil
}
func (h *huaweiDNSProviderSolver) getDNSClient(cfg *huaweiDNSProviderConfig, ch *v1alpha1.ChallengeRequest) (*huawei.Client, error) {
zoneID := cfg.ZoneID
dnsClient, ok := h.dnsClients[zoneID]
if !ok {
ak, sk, err := h.getCredential(cfg, ch.ResourceNamespace)
if err != nil {
return nil, err
}
dnsClient = huawei.NewClient(ak, sk, cfg.Region)
h.dnsClients[zoneID] = dnsClient
}
return dnsClient, nil
}
func (h *huaweiDNSProviderSolver) getCredential(cfg *huaweiDNSProviderConfig, ns string) (string, string, error) {
accessKey, err := h.getSecretData(cfg.AccessKeySecretRef, ns)
if err != nil {
return "", "", err
}
secretKey, err := h.getSecretData(cfg.SecretKeySecretRef, ns)
if err != nil {
return "", "", err
}
return string(accessKey), string(secretKey), nil
}
func (h *huaweiDNSProviderSolver) getSecretData(selector cmmetav1.SecretKeySelector, ns string) ([]byte, error) {
secret, err := h.client.CoreV1().Secrets(ns).Get(context.TODO(), selector.Name, metav1.GetOptions{})
if err != nil {
return nil, errors.Wrapf(err, "failed to load secret %q", ns+"/"+selector.Name)
}
if data, ok := secret.Data[selector.Key]; ok {
return data, nil
}
return nil, errors.Errorf("no key %q in secret %q", selector.Key, ns+"/"+selector.Name)
}