For some reason, the metadata server looks like a mystery. I understand how it works, where it's saved etc.
But, I want to know more about it. So, let's suppose that I create bash script that install some packages, add some cronjobs etc for an instance.
Where is this script stored?
Here is the description of an older implementation: https://ask.openstack.org/en/question.... This must be at the Grizzly timeframe.
I am fairly certain that metadata (and user data scripts are just a form of metadata) is still stored somewhere in the Nova darabase, probably the DB specific to the instance’s cell. nova-api provides access to the metadata, and the metadata server is the middle-man between the instance and nova-api.
I don’t have a cloud that I could check right now, but it looks like the code for creating the netadata table is here: https://git.openstack.org/cgit/openst.... Userdata seems to be right in the Instance table: https://git.openstack.org/cgit/openst....
Asked: 2018-02-15 15:27:14 -0600
Seen: 152 times
Last updated: Feb 15 '18
