openstack/puppet-ironic
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[inspector] use dnsmasq dhcp-sequential-ip flag in dnsmasq.conf

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Introspection naturally happens in large bulks, after which it's inactive.
Small pool for DHCP addresses means that we'll have conflicts due to how
dnsmasq distributes them by default - using hashing. This change tells dnsmasq
to allocate IP addresses sequentially instead to avoid these conflicts.

The drawback of this option is that long-running clients may switch IP
addresses if their lease expires. This is not a concern for short introspection
process.

Change-Id: I0f08609a9f72799ef9f62216041f2b2b9795afd5
This commit is contained in:
Dmitry Tantsur 2016-03-01 15:11:50 +01:00
parent 77974fd838
commit dfff2af147
2 changed files with 2 additions and 0 deletions
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1
templates/inspector_dnsmasq_http.erb
View File

@ -7,3 +7,4 @@ tftp-root=/tftpboot
dhcp-match=ipxe,175
dhcp-boot=tag:!ipxe,undionly.kpxe,localhost.localdomain,<%= @dnsmasq_local_ip %>
dhcp-boot=tag:ipxe,http://<%= @dnsmasq_local_ip %>:8088/inspector.ipxe
dhcp-sequential-ip

1
templates/inspector_dnsmasq_tftp.erb
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@ -5,3 +5,4 @@ dhcp-range=<%= @dnsmasq_ip_range %>,29
enable-tftp
tftp-root=/tftpboot
dhcp-boot=pxelinux.0,localhost.localdomain,<%= @dnsmasq_local_ip %>
dhcp-sequential-ip