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Windows instances failed to setup network.

asked 2017-06-14 00:39:43 +0300

fishyu gravatar image


I am having some weird issue with creating Windows instances on OpenStack Ocata.

We are creating our instances in the external network, and used to work fine in Liberty.

The issue we are seeing is that about half of the instances fail to connect to Metadata server because the Cloudbase MTUPlugin doesn't set the MTU value to 1450(By comparing the cloudbase log between failed instances and functioning instances).

The Cloudbase version is 0.9.9, and we use openstack self-service network setup based on the Ocata doc.

Another weird thing we see is that creating instance is working under the same subnet where compute nodes and controller node stay, but about half instances malfunction if it's in a different subnet.

Consider we put all nodes in, VLAN is 10.10.136/22, and instances in, 10.10.138/24 and are having this issue.

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answered 2017-06-14 00:42:05 +0300

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Failed instances log:

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answered 2017-06-14 14:24:46 +0300

avladu gravatar image


Can you share the two logs(cloudbase-init. log and cloudbase-init-unattend.log) for only one failed instance?
Please put the logs on a pastebin next time, as it is very hard to look at them otherwise.

This might be an issue with the dhcp service in Neutron. The instances that you spawn, also, have only one nic?

Thank you, Adrian Vladu

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Asked: 2017-06-14 00:39:43 +0300

Seen: 329 times

Last updated: Jun 14 '17