Comment 14 for bug 1406286

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Sergey Kolekonov (skolekonov) wrote : Re: cloud-init works unstable in Neutron GRE HA

Alexander, unfortunately, I don't have much information. I think that it would be better if the root cause of this problem will be determined by CentOS engineers. This bug description should be enough.
I don't have access to rhel images. On CentOS 7 image I still see cloud-init warnings so the possibility of failure also persists. It's safer to rebuild images with cloud-init 0.7.4 or try to use rhel package if it doesn't contain opennebula patches.

Dmitry, I suggest the following note, please answer if it's ok.

Instances metadata on CentOS 6.6 cloud images with cloud-init 0.7.5 may be unset in Neutron environments
When an environment is deployed with one of the Neutron topologies and CentOS 6.6 cloud images are used, instances can be unreachable via ssh due to cloud-init failure because users' keypairs and the rest of configuration data may not be set correctly.