title: Startup script only executing after instance reboot
body: <p>we have a startup-script that is working fine, but it only gets executed after reboot.</p>
  
  <p>i'm updating gcutil to gcloud compute and centos6 to centos7.</p>
  
  <p>I'm not sure if this has something to do with security issues (SElinux?).</p>
  
  <p>Can someone please help me debugging this?</p>
  
  <p>Facts: There startup-script log doesn't exist at instance creation.
  Also, in output console it says that there is no startup-scripts.</p>
  
  <p>After rebooting, everything goes how it should.</p>