openstack/bifrost
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Add option to disabled default gateway on bifrost

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There are situations where we can have different nics
living together, and the default gateway needs to be set
externally, not in the nic managed by bifrost.
The way dnsmasq works, is that if you do not set any
ip for default gateway, it assumes that to be the dnsmasq management
ip, and creates a default gateway in all nics attached to it.
That prevents default gateway being set externally, causing errors
of duplicated gateways.
To disable it, we need to pass a simple dhcp-option=3. So adding
this possibility to the template, just allowing a dnsmasq_router=false
to be passed as option.

Change-Id: I6279242de9bedf35d95c048fc2ce586435c3850b
This commit is contained in:
Yolanda Robla 2016-02-08 21:34:13 +01:00
parent e64010e595
commit 1d14c610fe
2 changed files with 5 additions and 0 deletions
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1
playbooks/roles/bifrost-ironic-install/defaults/main.yml
View File

@ -69,6 +69,7 @@ dhcp_lease_time: 12h
dhcp_static_mask: 255.255.255.0
# Dnsmasq default route for clients. If not defined, dnsmasq will push to clients
# as default route the same IP of the dnsmasq server.
# If set to false, it will disable default route creation in clients.
# Default: undefined
# dnsmasq_router:

4
playbooks/roles/bifrost-ironic-install/templates/dnsmasq.conf.j2
View File

@ -75,8 +75,12 @@ dhcp-range={{dhcp_pool_start}},{{dhcp_pool_end}},{{dhcp_lease_time}}
# Override the default route supplied by dnsmasq, which assumes the
# router is the same machine as the one running dnsmasq.
{% if dnsmasq_router is defined %}
{% if dnsmasq_router | bool == false %}
dhcp-option=3
{% else %}
dhcp-option=3,{{dnsmasq_router}}
{% endif %}
{% endif %}
{% if dnsmasq_dns_servers is defined %}
dhcp-option=6,{{dnsmasq_dns_servers}}