Initial upgrade flow for control-plane

clitools/pkg/node/fs.go

@@ -0,0 +1,32 @@
+package node
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"path/filepath"
+
+	monov1alpha1 "example.com/monok8s/pkg/apis/monok8s/v1alpha1"
+)
+
+func EngageControlGate(ctx context.Context, nctx *NodeContext) error {
+	gateFile := filepath.Join(monov1alpha1.EnvConfigDir, ".control-gate")
+
+	f, err := os.OpenFile(gateFile, os.O_CREATE|os.O_WRONLY, 0o644)
+	if err != nil {
+		return fmt.Errorf("touch %s: %w", gateFile, err)
+	}
+	defer f.Close()
+
+	return nil
+}
+
+func ReleaseControlGate(ctx context.Context, nctx *NodeContext) error {
+	gateFile := filepath.Join(monov1alpha1.EnvConfigDir, ".control-gate")
+
+	if err := os.Remove(gateFile); err != nil {
+		return fmt.Errorf("relate control gate: %w", err)
+	}
+
+	return nil
+}