ansible-dhcpd/defaults/main.yml

---

# ---- Global ISC DHCP Server configuration ----

# Is this DHCP server authoritative?
dhcpd_authoritative: False

# List of network interfaces to listen on for DHCP requests
# If this list is empty, Ansible will try to guess correct interfaces
# automatically
dhcpd_interfaces: []

# Default domain to use
dhcpd_domain: '{{ ansible_domain }}'

# List of default DNS servers. By default, point users to the same host that
# serves them DHCP requests, on default interface. If this host is a router,
# you might need to set DNS server to internal interface IP address.
dhcpd_dns_servers: [ '{{ ansible_default_ipv4.address }}' ]

# Max lease time in hours (default lease time is calculated below)
dhcpd_lease_time: 24

# Default global options formatted as a text block
dhcpd_global_options: |
  option domain-name "{{ ansible_domain }}";
  option domain-name-servers {{ dhcpd_dns_servers | join(' ') }};
  default-lease-time {{ (((dhcpd_lease_time / 2) + 6) * 60 * 60)|round|int }};
  max-lease-time {{ (dhcpd_lease_time * 60 * 60)|round|int }};
  log-facility local7;

# Custom options formatted as a text block
dhcpd_options: False


# ---- ISC DHCP Server configuration scopes ----

# These lists allow you to generate nested configuration scopes in
# dhcpd.conf. Most of the information about them can be found in dhcpd.conf(5)
# manual page. You can create nested configuration using Ansible variable
# expansion (examples below).

# List of general configuration parameters (work in any configuration scope):
#  - comment: ''            add a comment to a scope
#  - options: |             custom options for that scope defined as a text block
#  - include: ''            path to external file to include in this scope

# List of hosts (works in groups, subnets):
#  - hosts: '' or []        list of hosts to configure in that scope; if this is
#                           a path to a file, dhcpd will include an external file
#                           in this scope

# List of parameters specific to dhcpd_classes:
#  - class: ''              class name
#  - subclass:              this is a hash with expression as key and additional
#                           options as value in a text block (see example below);
#                           each match expression must end with a colon to indicate
#                           hash key; optional

# List of parameters specific to dhcpd_groups:
#  - subnets: []            list of subnet scopes to group together
#  - groups: []             list of other group scopes to include. No recursion!

# List of parameters specific to dhcpd_shared_networks:
#  - name: ''               name of shared network
#  - subnets: []            list of subnets in a shared network (do not use
#                           dhcpd_subnets here, because they will be duplicated
#                           and DHCP server will not start)

# List of parameters specific to dhcpd_subnets:
#  - subnet: ''             start of a subnet range (ie.: 192.168.1.0)
#  - netmask: ''            netmask for this subnet (ie.: 255.255.255.0)
#  - routers: '' or []      address or list of addresses of gateway for that
#                           subnet (ie.: 192.168.1.1)

# List of parameters specific to dhcpd_hosts:
#  - hostname: ''           hostname, without domain part
#  - address: ''            IP address reserved for that host, optional
#  - ethernet: ''           Ethernet MAC address of this host, optional


# List of classes
dhcpd_classes: []
  #- class 'example-class'
  #  subclass:
  #    'match1':
  #    'match2': |
  #      # match2 options in a text block;

  #- class 'example-empty-class'


# List of groups
dhcpd_groups: []
  #- comment: 'First group'
  #  hosts: '/etc/dhcp/dhcpd-group1-hosts.conf'
  #  groups: '{{ dhcpd_group_second }}'

# An example of group nesting
#dhcpd_group_second:
#  - comment: 'Second group'
#    hosts: '/etc/dhcp/dhcpd-group2-hosts.conf'


# List of shared networks
dhcpd_shared_networks: []
  #- name: 'shared-net'
  #  comment: "Local shared network"
  #  subnets: '{{ dhcpd_subnets_local }}'
  #  options: |
  #    default-lease-time 600;
  #    max-lease-time 900;


# List of subnets not in a shared network
dhcpd_subnets:
  - subnet: '{{ ansible_default_ipv4.network }}'
    netmask: '{{ ansible_default_ipv4.netmask }}'
    comment: 'Generated automatically by Ansible'

  #- subnet: 'dead:be:ef::/64'
  #  ipv6: True
  #  routers: '10.0.10.1'
  #  comment: "Example IPv6 subnet"
  #  options: |
  #    default-lease-time 300;
  #    max-lease-time 7200;
  #
  #- subnet: '10.0.20.0'
  #  netmask: '255.255.255.0'
  #  comment: 'Ignored subnet'

# An example subnets included in a shared network
#dhcpd_subnets_local:
#  - subnet: '10.0.30.0'
#    netmask: '255.255.255.0'
#    routers: [ '10.0.30.1', '10.0.30.2' ]
#
#  - subnet: '10.0.40.0'
#    netmask: '255.255.255.0'
#    routers: '19.0.40.1'
#    options: |
#      default-lease-time 300;
#      max-lease-time 7200;
#    pools:
#      - comment: "A pool in a subnet"
#        range: '10.0.30.10 10.0.30.20'


# Global list of hosts in DHCP
dhcpd_hosts: []
#  - hostname: 'examplehost'
#    address: '10.0.10.1'
#    ethernet: '00:00:00:00:00:00'

# Example global list of hosts read from an external file
#dhcpd_hosts: '/etc/dhcp/dhcpd.hosts.conf'


# List of external files to include
dhcpd_includes: []
  #- '/etc/dhcp/example.conf'

# ---- ISC DHCP failover configuration ----
#
# Each failover declaration consists of primary and secondary host, no more 
# than two nodes failover is allowed by isc-dhcpd currently.
#
# You must specify which failover each pool should use by specifying a
# 'failover peer' option in pool declaration.
#
# Each failover declaration has a set of an mandatory fields, which is:
#   primary: ""             Ansible inventory name of a primary DHCP host, if
#                           you need failover to work on different IP, 
#                           see primary_fo_addr option below.
#
#   secondary: ""           Ansible inventory name of a secondary DHCP host, if
#                           you need failover to work on different IP, 
#                           see secondary_fo_addr option below.
#
# Ansible inventory name is either IP ot hostname specified in inventory file.
#
#   mclt: 3600              Max Client Lead Time. The maximum amount of time 
#                           that one server can extend a lease for a DHCP 
#                           client beyond the time known by the partner server.
#
#   split: [0-255]          Specifies the split between the primary and
#                           secondary for the purposes of load balancing.
#                           Whenever a client makes a DHCP request, the DHCP
#                           server runs a hash on the client identification,
#                           resulting in value from 0 to 255. This is used as
#                           an index into a 256 bit field. If the bit at that
#                           index is set, the primary is responsible.  If
#                           the bit at that index is not set, the secondary
#                           is responsible.
#    -- or --
#   hba: ([0-9a-f]{2}:){32} Specifies the split between the primary and
#                           secondary as a bitmap rather than a cutoff, which
#                           theoretically allows for finer-grained control.
#                           In practice, there is probably no need for such
#                           fine-grained control, however.
#   max_response_delay: 5   Tells the DHCP server how many seconds may pass
#                           without receiving a message from its failover peer
#                           before it assumes that connection has failed.
#                           This is mandatory according to dhcpd.conf man page.
#   max_unacked_updates: 10 Tells the remote DHCP server how many BNDUPD
#                           messages it can send before it receives a BNDACK
#                           from the local system.
#                           This is mandatory according to dhcpd.conf man page.
#
# You must use either 'split' or 'hba' statement. Split has a preference, so
# if it's defined, 'hba' will be omitted by configuration template.
# Optional field are mostly desribed in dhcpd.conf man page:
#   port: 647               Specifies port on which primary and secondary
#                           nodes will listen for failover connection.
#                           Diffirent ports for primary and secondary is
#                           currently unsupported.
#
#   primary_fo_addr: ""     IP/Hostname of a primary DHCP host. This option
#                           is used if you need failover address be different 
#                           from ansible inventory IP/hostname.
#                           If omitted, then 'primary' is used.
#
#   secondary_fo_addr: ""   IP/Hostname of a secondary DHCP host. This option
#                           is used if you need failover address be different 
#                           from ansible inventory IP/hostname.
#                           If omitted, then 'secondary' is used.
#
#   auto_partner_down: 0    Number of second to start serving partners IPs
#                           after the partner's failure.
#
#   load_balance_max_seconds: 5
#   max_lease_misbalance: 15
#   max_lease_ownership: 10
#   min_balance: 60
#   max_balance: 3600
#
dhcpd_failovers: []
  ## Following is full cluster configuration
  #- failover: 'failover-localsubnet'
  #  primary: '10.0.10.1'
  #  primary_fo_addr: '10.5.10.1'
  #  secondary: '10.0.10.2'
  #  secondary_fo_addr: '10.5.10.2'
  #  port: 1337
  #  split: 128
  #  hba: aa:aa:aa:aa:aa:aa:aa:aa:aa:aa:aa:aa:aa:aa:aa:aa:aa:aa:aa:aa:aa:aa:aa:aa:aa:aa:aa:aa:aa:aa:aa:aa
  #  max_response_delay: 5
  #  max_unacked_updates: 10
  #  load_balance_max_seconds: 5
  #  auto_partner_down: 0
  #  max_lease_misbalance: 15
  #  max_lease_ownership: 10
  #  min_balance: 60
  #  max_balance: 3600
  #
  ## Following is minimal cluster configuration
  #- failover: 'failover-san'
  #  primary: '10.0.10.1'
  #  secondary: '10.0.10.2'
  #  mclt: 3600
  #  split: 128
  #  max_response_delay: 5
  #  max_unacked_updates: 10