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Message #05847
[Bug 1181378] Re: dhcp-agent network namespace does not have a default route, can't use upstream dns
** Changed in: neutron/grizzly
Assignee: (unassigned) => Aaron Rosen (arosen)
** Changed in: neutron/grizzly
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1181378
Title:
dhcp-agent network namespace does not have a default route, can't use
upstream dns
Status in OpenStack Neutron (virtual network service):
Fix Released
Status in neutron grizzly series:
Fix Released
Bug description:
The network namespace that dnsmasq runs in does not have a default
route on creation (to the router for that network) and as such trying
to use an upstream nameserver fails.
root@somehost# for i in $(ip netns | grep dhcp); do ip netns exec $i route -n; done
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
10.0.137.0 0.0.0.0 255.255.255.0 U 0 0 0 tap1a7c6129-07
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.224.0 0.0.0.0 255.255.255.0 U 0 0 0 tap43bd32a8-82
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.225.0 0.0.0.0 255.255.255.0 U 0 0 0 tap01947148-b2
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 10.0.129.1 0.0.0.0 UG 0 0 0 tapb4f816ac-a4
10.0.129.0 0.0.0.0 255.255.255.0 U 0 0 0 tapb4f816ac-a4
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
10.0.10.0 0.0.0.0 255.255.255.0 U 0 0 0 tapb5919ca3-bc
I have added the default route on only 1 of the namespaces, the
10.0.129.0/24 one but all others do not have them and can therefore
not resolve their upstream servers.
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