Example of dnsmasq for OpenShift lab

00-lab.conf

# /etc/dnsmasq.d/lab.conf
###############################################################################
# DNS Server (simple)
###############################################################################
#log-facility=-
log-facility=/opt/dnsmasq/dnsmasq.log
log-async=25

# default to 150
dns-forward-max=500
cache-size=500

# Log all queries (use for troubleshooting only)
log-queries

# Set local src address or interface to talk to a server
server=8.8.8.8

# Never forward plain names (without a dot or domain part)
domain-needed

# Never forward addresses in the non-routed address spaces.
bogus-priv

# do not use /etc/resolv.conf or any other file
no-resolv

# Don't store in cache the invalid resolutions
no-negcache

expand-hosts

# don't read /etc/hosts
no-hosts
# read OCP hosts from file

# Set the default domain for dnsmasq
domain=lab.shift.zone

###############################################################################
# DHCP Server (common)
###############################################################################
#no-dhcp-interface=ens3
dhcp-authoritative
dhcp-fqdn
#log-dhcp
dhcp-lease-max=100
#dhcp-duid=<enterprise-id>,<uid>
###############################################################################
# END OF FILE
###############################################################################

01-mgmt.telco.shift.zone.conf

## /etc/dnsmasq.d/mgmt.telco.shift.zone.conf
domain=mgmt.telco.shift.zone,198.18.111.0/24
addn-hosts=/opt/dnsmasq/mgmt.telco.shift.zone.hosts
dhcp-hostsfile=/opt/dnsmasq/mgmt.telco.shift.zone.dhcp
address=/apps.mgmt.telco.shift.zone/198.18.111.10
dhcp-range=set:mgmt,198.18.111.10,198.18.111.30,255.255.255.0,infinite
dhcp-option=tag:mgmt,option:router,198.18.111.1
dhcp-option=tag:mgmt,option:dns-server,192.168.1.5
dhcp-option=tag:mgmt,option:domain-search,mgmt.telco.shift.zone

02-mgmt.telco.shift.zone.hosts

## /opt/dnsmasq/mgmt.telco.shift.zone.hosts
# ingress VIP
198.18.111.10   apps
# api VIP
198.18.111.11   api api-int
# nodes
198.18.111.12   m0
198.18.111.13   m1
198.18.111.14   m2
198.18.111.15   w0
198.18.111.16   w1
198.18.111.17   w2

03-mgmt.telco.shift.zone.dhcp

## /opt/dnsmasq/mgmt.telco.shift.zone.dhcp
52:54:00:11:61:01,m0
52:54:00:11:61:02,m1
52:54:00:11:61:03,m2
52:54:00:11:61:04,w0
52:54:00:11:61:05,w1
52:54:00:11:61:06,w2