Added some ctl boilerplate

clitools/pkg/system/helpers.go

@@ -0,0 +1,55 @@
+package system
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"strings"
+)
+
+const DefaultSecond = 1_000_000_000
+
+func EnsureServiceRunning(ctx context.Context, r *Runner, svc string) error {
+	if _, err := r.Run(ctx, " rc-service", svc, "status"); err == nil {
+		return nil
+	}
+
+	_, err := r.RunRetry(ctx, RetryOptions{
+		Attempts: 3,
+		Delay:    2 * DefaultSecond,
+	}, "rc-service", svc, "start")
+	if err != nil {
+		return fmt.Errorf("failed to start service %q: %w", svc, err)
+	}
+
+	_, err = r.Run(ctx, "rc-service", svc, "status")
+	if err != nil {
+		return fmt.Errorf("service %q still not healthy after start: %w", svc, err)
+	}
+	return nil
+}
+
+func EnsureSysctl(ctx context.Context, r *Runner, key, want string) error {
+	_, err := r.Run(ctx, "sysctl", "-w", key+"="+want)
+	if err != nil {
+		return fmt.Errorf("failed setting sysctl %s=%s: %w", key, want, err)
+	}
+
+	// verify
+	path := "/proc/sys/" + strings.ReplaceAll(key, ".", "/")
+	raw, err := os.ReadFile(path)
+	if err != nil {
+		return fmt.Errorf("failed verifying sysctl %s: %w", key, err)
+	}
+	if strings.TrimSpace(string(raw)) != want {
+		return fmt.Errorf("sysctl %s not applied, expected %s got %s",
+			key, want, strings.TrimSpace(string(raw)))
+	}
+
+	return nil
+}
+
+func EnsureDir(ctx context.Context, r *Runner, path string, mode string) error {
+	_, err := r.Run(ctx, "install", "-d", "-m", mode, path)
+	return err
+}