/
kubernetes.go
149 lines (131 loc) · 4.02 KB
/
kubernetes.go
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package server
import (
"context"
"encoding/base64"
"log"
"os"
"time"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/aws/aws-sdk-go/service/eks"
"github.com/mattermost/mattermost-cloud/k8s"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
corev1 "k8s.io/api/core/v1"
k8sErrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/client-go/rest"
"sigs.k8s.io/aws-iam-authenticator/pkg/token"
)
// Deployment contains information needed to create a deployment in Kubernetes
type Deployment struct {
Namespace string
PR int
ImageTag string
DeployFilePath string
Environment CWS
}
func namespaceExists(kc *k8s.KubeClient, namespaceName string) (bool, error) {
_, err := kc.Clientset.CoreV1().Namespaces().Get(context.Background(), namespaceName, metav1.GetOptions{})
if err != nil && !k8sErrors.IsNotFound(err) {
return false, err
} else if err != nil && k8sErrors.IsNotFound(err) {
return false, nil
}
return true, nil
}
func getOrCreateNamespace(kc *k8s.KubeClient, namespaceName string) (*corev1.Namespace, error) {
namespace, err := kc.Clientset.CoreV1().Namespaces().Get(context.Background(), namespaceName, metav1.GetOptions{})
if err != nil && k8sErrors.IsNotFound(err) {
return kc.CreateOrUpdateNamespace(namespaceName)
}
if err != nil && !k8sErrors.IsNotFound(err) {
return nil, err
}
return namespace, nil
}
func deleteNamespace(kc *k8s.KubeClient, namespace string) error {
policy := metav1.DeletePropagationForeground
gracePeriod := int64(0)
deleteOpts := &metav1.DeleteOptions{
GracePeriodSeconds: &gracePeriod,
PropagationPolicy: &policy,
}
err := kc.Clientset.CoreV1().Namespaces().Delete(context.Background(), namespace, *deleteOpts)
if err != nil {
return errors.Wrapf(err, "failed to delete the namespace %s", namespace)
}
return nil
}
func waitForIPAssignment(kc *k8s.KubeClient, namespace string, logger logrus.FieldLogger) (string, error) {
ctx, cancel := context.WithTimeout(context.Background(), 5*time.Minute)
defer cancel()
for {
select {
case <-ctx.Done():
return "", errors.New("Timed out waiting for IP Assignment")
case <-time.After(30 * time.Second):
lb, _ := kc.Clientset.CoreV1().Services(namespace).Get(context.Background(), "cws-test-service", metav1.GetOptions{})
if len(lb.Status.LoadBalancer.Ingress) > 0 {
return lb.Status.LoadBalancer.Ingress[0].Hostname, nil
}
logger.Debug("No IP found yet. Waiting...")
}
}
}
func newKubeClient(cluster *eks.Cluster, logger logrus.FieldLogger) (*k8s.KubeClient, error) {
gen, err := token.NewGenerator(true, false)
if err != nil {
return nil, err
}
opts := &token.GetTokenOptions{
ClusterID: aws.StringValue(cluster.Name),
}
tok, err := gen.GetWithOptions(opts)
if err != nil {
return nil, err
}
ca, err := base64.StdEncoding.DecodeString(aws.StringValue(cluster.CertificateAuthority.Data))
if err != nil {
return nil, err
}
kc, err := k8s.NewFromConfig(
&rest.Config{
Host: aws.StringValue(cluster.Endpoint),
BearerToken: tok.Token,
TLSClientConfig: rest.TLSClientConfig{
CAData: ca,
},
},
logger,
)
if err != nil {
return nil, err
}
return kc, nil
}
func (s *Server) newClient(logger logrus.FieldLogger) (*k8s.KubeClient, error) {
if !isAwsConfigDefined() {
return nil, errors.Errorf("AWS Config not defined. Unable to authenticate with EKS")
}
name := s.Config.KubeClusterName
region := s.Config.KubeClusterRegion
sess := session.Must(session.NewSession(&aws.Config{
Region: aws.String(region),
}))
eksSvc := eks.New(sess)
input := &eks.DescribeClusterInput{
Name: aws.String(name),
}
result, err := eksSvc.DescribeCluster(input)
if err != nil {
log.Fatalf("Error calling DescribeCluster: %v", err)
}
kc, err := newKubeClient(result.Cluster, logger)
return kc, nil
}
func isAwsConfigDefined() bool {
_, awsSecretKey := os.LookupEnv("AWS_SECRET_ACCESS_KEY")
_, awsAccessKeyID := os.LookupEnv("AWS_ACCESS_KEY_ID")
return awsSecretKey && awsAccessKeyID
}