nova-network should increase nf_conntrack_max

[Ryan Finnie]

We ran into trouble when net.netfilter.nf_conntrack_count was exhausted by the system default of net.netfilter.nf_conntrack_max (65536). As the typical use scenario for Nova can easily exhaust that, nova-network should probably set a more reasonable default, like 2097152.

Version: 2012.2.1+stable-20121212-a99a802e-0ubuntu1.4~cloud0 (from cloud-archive)

[Jacek Nykis (jacekn)]

We hit the same issue on our compute nodes. The limit was also 65536 and it was not high enough for our use case.

[Chuck Short (zulcss)]

net.netfilter.nf_conntrack_max is not set by nova-network it uses the default.

[James Page (james-page)]

Probably a charm function, rather than something that the package or nova itself should try to complete.