So, a customer today was playing around with some metadata i.e.

“meta”: {
“rax-heat”: “dfdjh32j21-121c-411d-912c-77209ffc6642”
},

He understood setting the meta data key value pairs like;

nova meta platform-minion0-pp.gb-lon1.kubernetes.metroscales.io set foo=bar

and wanted to retrieve inside and outside of the VM. This is easy to do and can be done like

supernova lon show 812c7fed-ae3b-43ff-a0a1-0f07d52b795a | grep metadata
| metadata                            | {"rax-heat": "dfdjh32j21-121c-411d-912c-77209ffc6642", "foo": "bar", "rax_service_level_automation": "Complete"} |

or with nova

nova show 812c7fed-ae3b-43ff-a0a1-0f07d52b795a | grep metadata

Also it can be done inside the VM directly with xenstore-read

xenstore-read vm-data/user-metadata/build_config