ZStack

ZStack platform provides a AWS Ec2 metadata service, but with different datasource identity. More information about ZStack can be found at ZStack.

Discovery

To determine whether a vm running on ZStack platform, cloud-init checks DMI information by ‘dmidecode -s chassis-asset-tag’, if the output ends with ‘.zstack.io’, it’s running on ZStack platform:

Metadata

Same as EC2, instance metadata can be queried at

GET http://169.254.169.254/2009-04-04/meta-data/
instance-id
local-hostname

Userdata

Same as EC2, instance userdata can be queried at

GET http://169.254.169.254/2009-04-04/user-data/
meta_data.json
user_data
password