monorepo

Co-authored-by: Malte Poll <mp@edgeless.systems>
Co-authored-by: katexochen <katexochen@users.noreply.github.com>
Co-authored-by: Daniel Weiße <dw@edgeless.systems>
Co-authored-by: Thomas Tendyck <tt@edgeless.systems>
Co-authored-by: Benedict Schlueter <bs@edgeless.systems>
Co-authored-by: leongross <leon.gross@rub.de>
Co-authored-by: Moritz Eckert <m1gh7ym0@gmail.com>

coordinator/kubernetes/k8sapi/joinargs.go

@@ -0,0 +1,48 @@
+package k8sapi
+
+import (
+	"flag"
+	"fmt"
+
+	"github.com/google/shlex"
+	kubeadm "k8s.io/kubernetes/cmd/kubeadm/app/apis/kubeadm/v1beta3"
+)
+
+func ParseJoinCommand(joinCommand string) (*kubeadm.BootstrapTokenDiscovery, error) {
+	// Format:
+	// kubeadm join [API_SERVER_ENDPOINT] --token [TOKEN] --discovery-token-ca-cert-hash [DISCOVERY_TOKEN_CA_CERT_HASH] --control-plane
+
+	// split and verify that this is a kubeadm join command
+	argv, err := shlex.Split(joinCommand)
+	if err != nil {
+		return nil, fmt.Errorf("kubadm join command could not be tokenized: %v", joinCommand)
+	}
+	if len(argv) < 3 {
+		return nil, fmt.Errorf("kubadm join command is too short: %v", argv)
+	}
+	if argv[0] != "kubeadm" || argv[1] != "join" {
+		return nil, fmt.Errorf("not a kubeadm join command: %v", argv)
+	}
+
+	result := kubeadm.BootstrapTokenDiscovery{APIServerEndpoint: argv[2]}
+
+	var caCertHash string
+	// parse flags
+	flags := flag.NewFlagSet("", flag.ContinueOnError)
+	flags.StringVar(&result.Token, "token", "", "")
+	flags.StringVar(&caCertHash, "discovery-token-ca-cert-hash", "", "")
+	flags.Bool("control-plane", false, "")
+	if err := flags.Parse(argv[3:]); err != nil {
+		return nil, fmt.Errorf("parsing flag arguments failed: %v %w", argv, err)
+	}
+
+	if result.Token == "" {
+		return nil, fmt.Errorf("missing flag argument token: %v", argv)
+	}
+	if caCertHash == "" {
+		return nil, fmt.Errorf("missing flag argument discovery-token-ca-cert-hash: %v", argv)
+	}
+	result.CACertHashes = []string{caCertHash}
+
+	return &result, nil
+}