[RFE] Allow concurrect updating of dnsmasq configuration

[milan k]

The goal is to be able to (test) run an HA inspector deployment on a single node.

[Dmitry Tantsur (divius)]

I think I can approve this as part of the HA work.

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/504438
Committed: https://git.openstack.org/cgit/openstack/ironic-inspector/commit/?id=4ff0213e8770de2139f3ec68e65447a9dfcfac1f
Submitter: Zuul
Branch: master

commit 4ff0213e8770de2139f3ec68e65447a9dfcfac1f
Author: dparalen <email address hidden>
Date: Fri Sep 15 17:32:43 2017 +0200

    Allow concurrect updating of dnsmasq configuration

    This allows multiple instances of inspector to try updating dnsmasq
    configuration simultaneously. The goal is to be able to (test) run an HA
    inspector on a single node.

    A new config option `dnsmasq_pxe_filter.purge_dhcp_hostsdir` is introduced to
    be able to disable purging of the dhcp hosts directory in case multiple
    inspector instances are expected to run on the same node.

    Change-Id: I2f7b8d3172f375cf65e759c9b881fcf41649c2f0
    Closes-Bug: #1722267

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/ironic-inspector 7.0.0 release.