Ubuntu SRU information
[Impact]
Use of Neutron internal DNS resolution for resolution of instances attached to
the same project network is inconsistent due to use of configuration options
for the actual hostname entries in the dnsmasq hosts file paired with the
network 'dns_domain' attribute which is used to set the search path for the
same dnsmasq instance.
[Test Case]
Deploy OpenStack with Neutron internal DNS support enabled
Configure neutron with a dns_domain of 'testcase.internal'
Set a dns_domain attribute on the project network ('designate.local')
Boot an instance attached to the network
DNS resolution within the host will be asymmetric in terms of the actual dns
domain used.
root@bionic-045546-2:~# host 192.168.21.222
222.21.168.192.in-addr.arpa domain name pointer
bionic-045546-2.testcase.internal.
root@bionic-045546-2:~# host bionic-045546-2
bionic-045546-2.designate.local has address 192.168.21.222
which should be
root@bionic-045546-2:~# host bionic-045546-2
bionic-045546-2.testcase.local has address 192.168.21.222
[Regression Potential]
Minimal; the proposed fix actually reverts changes in Neutron which altered the
behaviour of the internal DNS support in Neutron incorrectly.
[Other Info]
This change in behaviour has been discussed at the upstream Neutron irc meeting
with consensus that the behaviour changes are incorrect and should be reverted.
** Also affects: cloud-archive
Importance: Undecided
Status: New
** Also affects: cloud-archive/queens
Importance: Undecided
Status: New
** Also affects: cloud-archive/train
Importance: Undecided
Status: New
** Also affects: cloud-archive/rocky
Importance: Undecided
Status: New
** Also affects: cloud-archive/stein
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1826419
Title:
dhcp agent configured with mismatching domain and host entries
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