Heat/Using-the-metadata-server

First edit /etc/heat/heat-metadata.conf

Set bind_host = <ip of openstack network interface> basically:

ifconfig | grep -A 1 demonet
demonetbr0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 10.0.0.1  netmask 255.255.255.0  broadcast 10.0.0.255

So for me it is 10.0.0.1

Then start the server:

heat-metadata &

Note: If you start the server at about the same time as the engine, the metadata server may not register properly. The metadata server registration code needs improvement.

Note: if you find that metadata is not being received by the server from the instance, check that you have connectivity to tcp:8002 by using nmap on the instance, it may be necessary to add an iptables rule which allows the instance access to the service on the host:

iptables -I INPUT -p tcp --dport 8002 -j ACCEPT -i demonetbr0

If this solves your problem and allows connectivity to the metadata server from the instance, you will need to add the rule to the /etc/sysconfig/iptables file, restart iptables, and restart openstack, if you fail to do this, the manually added rule will be overwritten by openstack every time a new instance is launched.

vim /etc/sysconfig/iptables
service iptables restart
tools/openstack restart