cookbook 'dhcp', '= 5.0.2'
dhcp
(53) Versions
5.0.2
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8.1.16
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8.1.15
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8.1.14
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Installs and configures DHCP
cookbook 'dhcp', '= 5.0.2', :supermarket
knife supermarket install dhcp
knife supermarket download dhcp
Description
Data bag and Attribute driven DHCP server.
- Supports setting up Master/Master isc DHCP failover.
- Includes Support for ddns
- Includes LWRPs for managing hosts, groups and subnets.
- Use databags or attributes + wrapper cooks to manage dhcp server [Example](examples/attribute_based.rb)
Large parts were borrowed from work initially done by Dell, extended by Atalanta Systems and reworked by Matt Ray and Opscode. Big thanks to all of them.
Requirements
Tested on the following with Chef 11 and Chef 12:
* Ubuntu 12.04
* CentOS 6
Limitations
- only setup to handle ipv4
Recipes
default
Stub recipe that does nothing. Good for including LWRP's but not the other recipe stuffs.
server
The node will install and configure the dhcp-server
application.
Configuration is through various dhcp_X bags, and the current role/environment
Node Attributes
Almost everyone of the parameters and options are able to be overrode in the
host/group/network scope these are general defaults for the server.
Check out the man page for details on dhcpd.conf options/params.
attribute | Type | Default | description |
---|---|---|---|
node[:dhcp][:use_bags] |
Boolean |
true | When false we won't attempt to load data from bags. |
node[:dhcp][:hosts] |
Array |
[] |
The list of hosts items that this server should load |
node[:dhcp][:groups] |
Array |
[] |
The list of group items this server should load |
node[:dhcp][:networks] |
Array |
[] |
The list of network items this node should load |
node[:dhcp][:interfaces] |
Array |
[] |
The Network Interface(s) to listen on. If an empty list then we will listen on all interfaces. |
node[:dhcp][:rndc_keys] |
Array |
Attribute based representation of rndc keys you want to use. | |
node[:dhcp][:hosts_bag] |
String |
dhcp_hosts | The name of the data bag that holds host items. |
node[:dhcp][:groups_bag] |
String |
dhcp_groups | The name of the data bag that holds group items |
node[:dhcp][:networks_bag] |
String |
dhcp_networks | The name of the data bag that holds network items |
node[:dhcp][:host_data] |
Hash |
{} |
Hash of hosts data. The node[dhcp][:hosts] entries should have a corresponding entry here when not using bags |
node[:dhcp][:group_data] |
Hash |
{} |
Same as host_data, but for groups |
node[:dhcp][:network_data] |
Hash |
{} |
Same as host_data, but for networks |
node[:dhcp][:failover] |
Boolean |
false |
Enable Failover support buy setting to true
|
node[:dhcp][:failover_lease_hack] |
Boolean |
false |
Force partner-down state on start by rewriting lease file |
node[:dhcp][:allows] |
Array |
["booting", "bootp", "unknown-clients"] | Global Dhcpd allow entries |
node[:dhcp][:my_ip] |
String |
Nil | Set host IP address in failover setup. node[:ipaddress] is used if empty. |
node[:dhcp][:masters] |
Array |
Array of hashes to override node search for masters. Must have :ipaddress key. | |
node[:dhcp][:slaves] |
Array |
Array of hashes to override node search for slaves. |
DHCP Global Options
attribute | Type | Default | description |
---|---|---|---|
node[:dhcp][:options]['domain-name-servers'] |
String |
"8.8.8.8, 8.8.4.4" | List of dns servers to send to clients in the global scope |
node[:dhcp][:options]['host-name'] |
String |
" = binary-to-ascii (16, 8, \"-\", substring (hardware, 1, 6))" | Options for global scope host-name settings. The default here will generate a host as mac address if the node doesn't provide a hostname or is not defined in dns/hosts/groups. |
node[:dhcp][:options]['domain-name'] |
String |
"\"#{domain}\"" | Set domainname in the global scope to this nodes domain |
DHCP Global Parameters
These are all just k/v entries in the global params hash. All values are type: String
attribute | Type | Default | description |
---|---|---|---|
node[:dhcp][:parameters]["default-lease-time"] |
String |
"6400" | Set the default lease time in the global scope |
node[:dhcp][:parameters]["ddns-domainname"] |
String |
"\"#{domain}\""` | Set the ddns domain to this nodes domain |
node[:dhcp][:parameters]["ddns-update-style"] |
String |
"interim" | ddns Update style |
node[:dhcp][:parameters]["max-lease-time"] |
String |
"86400" | Max Lease time |
node[:dhcp][:parameters]["update-static-leases"] |
String |
"true" | Make sure we push static ip adresses defined in groups/hosts to the dns server |
node[:dhcp][:parameters]["one-lease-per-client"] |
String |
"true" | When a client requests an ip it will release any held leases. |
node[:dhcp][:parameters]["authoritative"] |
String |
"" | This setting has no value on purpose thats how isc-dhcpd wants it. |
node[:dhcp][:parameters]["ping-check"] |
String |
"true" | Enable Address collision checking |
node[:dhcp][:parameters]["next-server"] |
String |
"#{ipaddress}" |
Set this server as the global next-server |
node[:dhcp][:parameters]["filename"] |
String |
'"pxelinux.0"' |
For tftp file name Note: the quotes are necessary for this option in the fall throught to dhcpd config. |
Failover parameters
attribute | Type | Default | description |
---|---|---|---|
node[:dhcp][:failover_params]["mclt"] |
String |
"3600" | Set Maximum Client Lead Time |
node[:dhcp][:failover_params]["port"] |
String |
"647" | TCP port to listen for connections from peer |
node[:dhcp][:failover_params]["peer_port"] |
String |
"647" | TCP port to connect to failover peer |
node[:dhcp][:failover_params][auto_partner_down""] |
String |
"0" | Timeout in seconds to enter partner-down state if peer is unavailable |
Platform Default Attributes
RHEL Platforms*
attribute | Type | Default |
---|---|---|
node[:dhcp][:dir] |
String |
"/etc/dhcpd" |
node[:dhcp][:package_name] |
String |
"dhcp" |
node[:dhcp][:service_name] |
String |
"dhcpd" |
node[:dhcp][:config_file] |
String |
"/etc/dhcp/dhcpd.conf" on RHEL < 6 it defaults to "/etc/dhcpd.conf
|
node[:dhcp][:init_config] |
String |
"/etc/sysconfig/dhcpd" |
Debian Platforms
attribute | Type | Default |
---|---|---|
node[:dhcp][:dir] |
String |
"/etc/dhcpd" |
node[:dhcp][:package_name] |
String |
"isc-dhcp-server" |
node[:dhcp][:service_name] |
String |
"isc-dhcp-server" |
node[:dhcp][:config_file] |
String |
"/etc/dhcp/dhcpd.conf" |
node[:dhcp][:init_config] |
String |
"/etc/default/isc-dhcp-server" |
Data Bags
Data bags drive the lionshare of the dhcp configuration. Beyond the global settings. It is not required to configure
any bags other than dhcp_networks to get up and running, But if you want to statically map a network or have handy
Host names provisioned by dhcp you will have to add either dhcp_groups/dhcp_hosts
bags and items.
You can generate example bags by using these handy commands
knife data bag create dhcp_networks
knife data bag create dhcp_groups
knife data bag create dhcp_hosts
knife data bag from file dhcp_networks examples/data_bags/dhcp_networks
knife data bag from file dhcp_groups examples/data_bags/dhcp_groups
knife data bag from file dhcp_hosts examples/data_bags/dhcp_hosts
dhcp_networks
Looked up via node[:dhcp][:networks_bag]
. Describes networks this dhcp server should be configured to provide services for.
Per-network options can be provided as an array of strings where each string is a dhcp option.
Make sure you escape "
's properly as dhcpd is touchy about the format of values.
{ "id": "192-168-1-0_24", "routers": [ "192.168.1.1" ], "address": "192.168.1.0", "netmask": "255.255.255.0", "broadcast": "192.168.1.255", "range": "192.168.1.50 192.168.1.240", "options": [ "time-offset 10" ], "next_server": "192.168.1.11" }
dhcp_groups
Looked up via node[:dhcp][:grougroups]
Items for this bag are group entries as per the man page.
Groups are sets of machines that can be configured with common parameters. A group can be bare. I.e.
Contains no host or parameters entries whatsover, and just defines options.
The only required key in a host def is the "mac":
key. Everything else is optional
Example Group Bag
json
{
"id": "test",
"pxe": "ubuntu-precise",
"parameters": [
"use-host-decl-names on",
"max-lease-time 300",
"default-lease-time 120",
"next-server \"someplace\""
],
"hosts": {
"some-vm": {
"parameters": [ ],
"mac": "11:22:33:44:55:66",
"ip": "192.168.1.111"
},
"another-host": {
"mac": "22:33:44:55:66:77"
}
}
}
There are a few keys that merit more discussion:
"hosts":
key dhcp_group Items
Groups in isc-dhcp can define lists of hosts. In this example we are using the use-host-decl-names on
tell dhcp to use the "some-vm" and "another-host" entries as the host-name for these clients.
As well as setting other per-group parameters.
Each Host in the hosts Hash can have a number of settings, but the only required setting is "mac":
the mac address
for the host.
Key | Description |
---|---|
"mac": |
mac address of this host |
"ip": |
ip address of this host |
"parameters": |
an array of isc-dhcpd parameters as-per the global parameter setting. |
"pxe": |
This key is used by my pxe cookbook to figure out what pxe item you want this group to boot too. That Pxe cookbook should be released soon (hopefully). |
dhcp_hosts
Dhcp hosts bag is looked up via node[:dhcp][:hosts_bag]
, and contains Host Items.
Example Most Basic host:
{ "id": "vagrant-vm", "hostname": "vagrant.vm", "mac": "08:00:27:f1:1f:b6", }
Example Complex host:
json
{
"id": "pxe_test-vm",
"hostname": "pxe_test.vm",
"mac": "08:00:27:8f:7b:db",
"ip": "192.168.1.31",
"parameters": [ ],
"options": [ ],
"pxe": "ubuntu-precise"
}
Resources/Providers
dhcp_host
Manipulate host entries in dhcpd
Actions
Action | Description |
---|---|
add |
_default_ Add this host record |
remove |
Delete this host record |
Paramaters
Param | Type | Default |
---|---|---|
hostname |
String |
|
macaddress |
String |
|
ipaddress |
String |
|
options |
Array |
[] |
parameters |
Array |
[] |
conf_dir |
String |
"/etc/dhcp" |
Example
Add a Node
ruby
dhcp_host "myhost" do
hostname "somebox.foobar.com"
macaddress "08:00:27:f1:1f:b6"
ipaddress "192.168.1.22"
options [ "domain-name-servers 8.8.8.8" ]
end
Remove a node
ruby
dhcp_host "myhost" do
action :remove
hostname "somebox.foobar.com"
end
If you undefine an entry it will also get removed.
dhcp_group
Actions
Action | Description |
---|---|
add |
_default_ Add this host record |
remove |
Delete this host record |
Paramaters
Param | Type | Default | Desciption |
---|---|---|---|
name |
String |
:name_attribute |
|
hosts |
Hash |
{} |
This is a hash of host entries that follow the host-databag format. See the example entry in examples directory |
parameters |
Array |
[] |
|
evals |
Array |
[] |
This is an array of multiline strings of eval |
conf_dir |
String |
"/etc/dhcp" |
The directory where the config files are stored |
Example
hosts_data = { "some-vm"=> {"parameters"=>[], "mac"=>"11:22:33:44:55:66", "ip"=>"192.168.1.111"}, "another-host"=>{"mac"=>"22:33:44:55:66:77"}} } dhcp_group "some_group" do parameters [ "default-lease-time 120", "next-server \"someplace\""] hosts hosts_data end
dhcp_subnet
Action | Description |
---|---|
add |
_default_ Add this host record |
remove |
Delete this host record |
Paramaters
Param | Type | Default | Desciption |
---|---|---|---|
subnet |
String |
:name_attribute |
The network subnet |
broadcast |
String |
nil |
The broadcast address for the subnet |
netmask |
String |
nil |
The netmask address for the subnet |
routers |
Array |
[] |
Gateways for the subnet |
options |
Array |
[] |
DHCP options to set for the subnet |
pool |
block |
nil |
Define a pool block for a dhcp_subnet . See 'Parameters for pool' below. |
next_server |
String |
nil |
Next server for TFTP/PXE |
evals |
Array |
[] |
This is an array of multiline strings of eval |
ddns |
String |
nil |
Domain name that will be appended to the client's hostname to form a fully-qualified domain-name (FQDN) |
key |
Hash |
{} |
Shared secret key for DDNS |
zones |
Array |
[] |
NOTE: Please help update with a good description |
conf_dir |
String |
"/etc/dhcp" |
Main dhcpd config directory |
Parameters for pool
Param | Type | Default | Desciption |
---|---|---|---|
peer |
String |
nil |
Peer server for this segment |
range |
String or Array
|
[] |
Range of IPs to make available for DHCP in the subnet |
deny |
String |
nil |
Only those clients that do not match any entries on the deny list will be eligible. |
Example
dhcp_subnet "192.168.1.0" do pool do range ["192.168.1.100 192.168.1.200", "10.33.66.10 10.33.66.100"] end netmask "255.255.255.0" broadcast "192.168.1.255" options [ "time-offset 10" ] next_server "192.168.1.11" routers "192.168.1.1" evals [ %q| if exists user-class and option user-class = "iPXE" { filename "bootstrap.ipxe"; } else { filename "undionly.kpxe"; } | ] end
dhcp_shared_network
Action | Description |
---|---|
add |
_default_ Add this shared network |
remove |
Delete this shared network record |
Paramaters
Param | Type | Default | Desciption |
---|---|---|---|
subnet |
dhcp_subnet |
nil |
The network subnet to define inside the shared network. Can define multiple. |
Example
dhcp_shared_network 'mysharednet' do subnet '192.168.1.0' do pool do range ['192.168.1.100 192.168.1.200', '10.33.66.10 10.33.66.100'] end netmask '255.255.255.0' broadcast '192.168.1.255' next_server '192.168.1.11' routers '192.168.1.1' evals [ %q| if exists user-class and option user-class = "iPXE" { filename "bootstrap.ipxe"; } else { filename "undionly.kpxe"; } | ] end subnet '10.0.2.0' do broadcast '10.0.2.254' netmask '255.255.255.0' pool do range ['10.0.2.50 10.0.2.240'] end end end
dhcp_class
Manage dhcp classes
Actions
Action | Description |
---|---|
add |
_default_ Add this host record |
Paramaters
Param | Type | Default |
---|---|---|
match |
String |
|
subclass |
String |
|
subclasses |
Array |
[] |
Example
Add a Node
ruby
dhcp_class 'ignorehosts' do
match 'hardware'
subclass '1:10:bf:48:42:55:01'
subclass '1:10:bf:48:42:55:02'
end
If you undefine an entry it will also get removed.
License and Author
Originally forked from
https://github.com/spheromak/dhcp-cook
Maintainer, Authors and Contributors
Maintainer | Jacob McCann |
Original Author | Jesse Nelson |
Author | Matt Ray |
Contributor | Myles Steinhauser |
Contributor | Bao Nguyen |
Contributor | Chaman Kang |
Contributor | Will Reichert |
Contributor | Simon Johansson |
Contributor | Robert Choi |
Contributor | Hippie Hacker |
Contributor | Eric Blevins |
Copyright | Copyright (c) 2013 Jesse Nelson |
Copyright | 2011 Atalanta Systems |
Copyright | 2011 Dell, Inc. |
Copyright | 2011 Opscode, Inc. |
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
5.0.2
- bug: Include classes.d/list.conf in dhcp.conf
- bug: Make dhcp_subnet names declared in dhcp_shared_network more unique
5.0.1
- bug: Pin partial templates to dhcp cookbook
5.0.0
- BREAKING feature: Allow defining multiple pools in a subnet
- This moves
range
andpeer
attribtue fromdhcp_subnet
block to embeddedpool
block insidedhcp_subnet
. See updated examples. - Currently this DOES NOT break defining subnets via data_bags or node attributes
- This moves
4.1.2
- bug: Allow defining dhcp_class with no subclasses
4.1.1
- improve: Add dhcp_class ChefSpec matcher
4.1.0
- feature: dhcp_class provider
4.0.1
- fix: be able to declare a blank subnet inside a shared-network
4.0.0
- feature: dhcp_shared_network provider to define subnets inside a shared-network block
- improve: allowing as blank as possible of a subnet block
- improve: setting next-server in a subnet block
- improve: allow dhcp_subnet range to be set with a String
- improve: documentation
- fix: including dhcp_host config files
- fix: Chef 12 support
- fix/improve: testing
3.0.0
Breaking Changes
* feature: allow setting multiple ranges in subnets. The range param now HAS to be an array, existing cooks will not work.
* improve: hostname in group configs is no long forced instead you can specify this in paramaters you pass.
2.2.2
- fix: Debian system have Chef with version Chef: 11.10.0.rc.1 that Chef::Version doesn't detect correctly
- fix: handle case where peer is unavailable on cluster start
- improve: better chef-solo support
- feature: Allow setting slaves and masters in attributes.
- feature: Added ability to pass eval into subnets
2.2.1:
- support attribute driven mode, where no databags are needed to operate
- feature: add evals to groups
- fix error in subnet provider caused by mis-merged comma :(
2.1.2:
- change write_config to write_include, write_config doesn't work on ubuntu 12.04
- allow you to set ddns-domainname for each subnet
- convert "not if"'s to "unles"
- Cleanup Readme for readability and attribution
- update contributors
2.1.1:
- add tailor cane, kitchen testing
- chef specs for chefspec 3.0
- allow ddns update in subnet (pull request #13 from simonjohansson)
- fixes for chef11 compatibility
- fix version check in DSL condition
- update service notifications to new format
2.0.0:
- Initial public release
- Restructure entire cookbook for better reusability
- Remove Internal/non-public dependencies
- Fix: master/slave replication issues
- Fix: LWRP notification method
- Add minimal spec's for libraries
- New: examples directory with databags and environments
- New: configurable bag lookups for dhcp/dns bags
- New: Group host list support
- New: Defaults to mac address as hostname for non registered clients
- New: Defines global defaults in default attributes