Reviewed: https://review.opendev.org/657806
Committed:
https://git.openstack.org/cgit/openstack/neutron/commit/?id=8f5020120e4fb6789dcf8cda92343fde55f14aee
Submitter: Zuul
Branch: master
commit 8f5020120e4fb6789dcf8cda92343fde55f14aee
Author: James Page <james.p...@ubuntu.com>
Date: Sat May 4 09:21:28 2019 -0600
Revert "Pass network's dns_domain to dnsmasq conf"
The dns_domain attribute of a network is intended for use
by neutron when creating DNS records in an external DNS
system such as Designate.
By using the networks dns_domain, the configured search
path on booted instances mismatches with the generated
dns assignments for instance ports in the hosts file
for dnsmasq which creates a mismatched forward/reverse
lookup behaviour.
This reverts commit 137a6d61053fb1cfb9a0a583b5a5c0f6253c75e6
and commit 7fdd6adc7acf99e74fbe1c12606f8c867ae134ae.
Closes-Bug: 1826419
Depends-On: I145144c042b100f7e12a02a8ac7e0fbbe41e984d
Change-Id: I5ff03b5ad8af432a9f7919ef953d7d8c434b93bd
** Changed in: neutron
Status: In Progress => Fix Released
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https://bugs.launchpad.net/bugs/1826419
Title:
dhcp agent configured with mismatching domain and host entries
Status in Ubuntu Cloud Archive:
Fix Committed
Status in Ubuntu Cloud Archive queens series:
Fix Committed
Status in Ubuntu Cloud Archive rocky series:
Fix Committed
Status in Ubuntu Cloud Archive stein series:
Fix Committed
Status in Ubuntu Cloud Archive train series:
Fix Committed
Status in neutron:
Fix Released
Status in neutron package in Ubuntu:
Fix Released
Status in neutron source package in Bionic:
Fix Committed
Status in neutron source package in Cosmic:
Fix Committed
Status in neutron source package in Disco:
Fix Committed
Status in neutron source package in Eoan:
Fix Released
Bug description:
Related bug 1774710 and bug 1580588
The neutron-dhcp-agent in OpenStack >= Queens makes use of the
dns_domain value set on a network to configure the '--domain'
parameter of the dnsmasq instance that supports it; at the same time,
neutron makes use of CONF.dns_domain when creating dns_assignments for
ports - this results in a hosts file for the dnsmasq instance which
uses CONF.dns_domain and a --domain parameter of network.dns_domain
which do not match.
This results in a search path on instances booted attached to the
network which is inconsistent with the internal DNS entries that
dnsmasq responds with:
root@bionic-045546-2:~# host 192.168.21.222
222.21.168.192.in-addr.arpa domain name pointer
bionic-045546-2.jamespage.internal.
root@bionic-045546-2:~# host bionic-045546-2
bionic-045546-2.designate.local has address 192.168.21.222
In the above example:
CONF.dns_domain = jamespage.internal.
network.dns_domain = designate.local.
Based on previous discussion in bug 1580588 I think that the
dns_domain value for a network was intented for use for external DNS
integration such as that provided by Designate.
The changed made under commit:
https://opendev.org/openstack/neutron/commit/137a6d61053
appear to break this assumption, producing somewhat inconsistent
behaviour in the dnsmasq instance for the network.
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https://bugs.launchpad.net/cloud-archive/+bug/1826419/+subscriptions
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