Metadata server

The metadata server is used for storing instance VM configuration information, for example, authentication information or a VM customization script.

In an OpenStack environment, the metadata is stored in Nova Metadata API. MidoNet provides a Metadata Proxy implementation, which forwards metadata requests from VMs to the Nova Metadata API, in a similar way Neutron Metadata Proxy does.


The Metadata Proxy creates an interface on the hypervisor hosts, named "metadata".

When using iptables it may be necessary to add a rule to accept traffic on that interface:

iptables -I INPUT 1 -i metadata -j ACCEPT
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