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main.go
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main.go
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package main
import (
"context"
"fmt"
"log"
"os"
"cloud.google.com/go/pubsub"
v1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/rest"
)
// pubsub docs are here:
// https://pkg.go.dev/cloud.google.com/go/pubsub
var ctx = context.Background()
func main() {
projectID := os.Getenv("PROJECT_ID")
subID := os.Getenv("SUBSCRIPTION")
if projectID == "" {
log.Fatal("PROJECT_ID not set")
}
if subID == "" {
log.Fatal("SUBSCRIPTION not set")
}
// Run findSecret once to ensure permissions are set correctly
_, err := findSecret(ctx, "")
if err != nil {
log.Fatal(err)
}
log.Fatal(pullMsgs(projectID, subID))
}
func pullMsgs(projectID, subID string) error {
client, err := pubsub.NewClient(ctx, projectID)
if err != nil {
return fmt.Errorf("pubsub.NewClient: %v", err)
}
defer client.Close()
sub := client.Subscription(subID)
// Receive messages for 10 seconds, which simplifies testing.
// Comment this out in production, since `Receive` should
// be used as a long running operation.
//ctx, cancel := context.WithTimeout(ctx, 360*time.Second)
//defer cancel()
err = sub.Receive(ctx, func(ctx context.Context, msg *pubsub.Message) {
log.Println("Got message. Attrs:", msg.Attributes)
eventType, _ := msg.Attributes["eventType"]
if eventType != "SECRET_VERSION_ADD" {
msg.Ack()
return
}
fullSecretID, ok := msg.Attributes["secretId"]
if !ok {
msg.Ack()
log.Println("Received SECRET_VERSION_ADD with no secretId")
return
}
// have
// projects/827585297303/secrets/test-secret
// want
// test-secret
var projectNumber int
var secretID string
_, err := fmt.Sscanf(fullSecretID, "projects/%d/secrets/%s",
&projectNumber, &secretID)
if err != nil {
msg.Ack()
log.Printf("Failed to extract final portion of secretId %q\n", fullSecretID)
return
}
log.Println("secretID =", secretID)
secret, err := findSecret(ctx, secretID)
if err != nil {
msg.Ack()
log.Printf("Error finding secret %q: %v\n", secretID, err)
return
}
if secret == nil {
log.Printf("No matching secret in kubernetes for %q\n", secretID)
msg.Ack()
return
}
log.Printf(
"Found %q in namespace %q for gsm secret %q",
secret.Name, secret.Namespace, secretID,
)
msg.Ack()
// At this point we would access the secret and do something useful
// with it
})
if err != nil {
return fmt.Errorf("sub.Receive: %v", err)
}
return nil
}
func findSecret(ctx context.Context, gsmSecretID string) (*v1.Secret, error) {
config, err := rest.InClusterConfig()
if err != nil {
return nil, err
}
kubeclient, err := kubernetes.NewForConfig(config)
if err != nil {
return nil, err
}
secretsList, err := kubeclient.CoreV1().Secrets(v1.NamespaceAll).List(ctx, metav1.ListOptions{})
if err != nil {
return nil, fmt.Errorf("failed to list secrets: %v", err)
}
var _ = secretsList
for _, secretItem := range secretsList.Items {
anno, ok := secretItem.Annotations["jenkins-x.io/gsm-secret-id"]
if !ok {
continue
}
if anno == gsmSecretID {
return &secretItem, nil
}
}
return nil, nil
}