How to run user script while booting an instance using cloud-init software ?

Solution Verified - Updated -

Issue

  • How can we run a script while spawning an instance using cloud-init ?.
  • cloud-init software is installed on image.Need help to find a way to use/run user script on every boot.
  • How to avoid making /etc/cloud/cloud.cfg messy by keeping the scripts at different path ?.

Environment

  • Red Hat Enterpise Linux OpenStack Platform 7.
  • RHEL qcow2 image.

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