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ddnsupdate (3) Versions 0.1.2

Installs/Configures nsupdate to manage host dynamic dns and other RR

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cookbook 'ddnsupdate', '= 0.1.2'
cookbook 'ddnsupdate', '= 0.1.2', :supermarket
knife cookbook site install ddnsupdate
knife cookbook site download ddnsupdate
README
Dependencies
Changelog
Quality

ddnsupdate Cookbook

This is an OpsCode Chef cookbook for Managing BIND DNS Resource Records using nsupdate.

This cookbook was primarily developed to Manage an Internal BIND DNS Domain Dynamic Records for Instances in Amazon EC2 infrastructure (where DHCP could not perform DNS Dynamic Records Updates, this might change in the future), but this cookbook is not limited just to Amazon EC2 and could be used to manage ant BIND DNS Domain Dynamic Records.

Currently it supports common RR types [A PTR CNAME MX], more features and attributes will be added over time, feel free to contribute what you find missing!

Supported DDNS Resource Record Types

  • A
  • PTR
  • CNAME
  • MX (limited support for MX RR priority)

Cookbook Recipes

  • ddnsupdate::install - install bind utils package and setup DDNSSEC Key file

  • ddnsupdate::host - configure nsupdate to manage Host DDNS A & PTR RR

  • ddnsupdate::rr - manage DDNS RR via node attribute using LWRP

Cookbook Repository

https://github.com/vkhatri/ddnsupdate

Cookbook Dependencies

None

Cookbook rr LWRP

*LWRP - ddnsupdate_rr

rr LWRP is used to create/delete Dynamic DNS RR.

LWRP example

RR via node attribute:

"default_attributes": {
  "ddnsupdate": {
    "rr": {
      "create": {
        "resource record name": {
          "type": "A",
          "value": [
            "resource record ip address 1",
            "resource record ip address 2"
          ],
          "ttl": 300 # override default ttl value
        },
        "resource record ip": {
          "type": "PTR",
          "value": [
            "resource record name 1",
            "resource record name 2"
          ],
          "ttl": 900
        },
        "resource record zone": {
          "type": "MX",
          "priority": 10,
          "value": [
            "resource record name"
          ]
        }
      },
      "delete": {
        "resource record name": {
          "type": "type",
          "value": "resource record value",
          "purge": false
        }
      }
    }
  }
}

Create a RR using LWRP

ddnsupdate_rr rr_name_description
  option option_name
end

Delete a RR using LWRP

ddnsupdate_rr rr_name_description
  option option_name
  action :delete
end

Delete a RR with Purge using LWRP

A RR like A or PTR could point to more than one record value. To delete RR entirely set RR attribute purge.

ddnsupdate_rr rr_name_description
  option option_name
  purge  true
  action :delete
end

LWRP Options

nsupdate Reference: man nsupdate

Parameters:

  • type (required) - RR type, e.g. A PTR CNAME MX
  • ttl (default: node.ddnsupdate.ttl) - RR ttl value
  • purge (default: false) - delete all RR record values, in conjunction with action :delete
  • value (default: [], required) - array of RR value(s)
  • server (default: node.ddnsupdate.server) - RR server to create/delete
  • zone (require) - RR zone
  • priority (default: 10) - MX RR priority
  • ddnssec_key_file (default: node.ddnsupdate.ddnssec.file) - RR ddnssec key file
  • resolv_conf_file (default: /etc/resolv.conf) - resolv conf file

Cookbook core Attributes

  • default[:ddnsupdate][:server] (default: nil): ddns server, overrides /etc/resolv.conf dns server lookup, required if default[:ddnsupdate][:use_resolv_conf] is not set
  • default[:ddnsupdate][:use_resolv_conf] (default: nil): if set, sets default[:ddnsupdate][:resolv_conf] attributes and default[:ddnsupdate][:server]

    If there is no server ip address configured via attribute
    default[:ddnsupdate][:server], this attribute will use
    first nameserver entry from /etc/resolv.conf file.
    
  • default[:ddnsupdate][:ttl] (default: 300): RR TTL value

Cookbook ddnssec Attributes

  • default[:ddnsupdate][:ddnssec][:manage] (default: true): if true manages bind ddnssec configuration file node[:ddnsupdate][:ddnssec][:key_file]
  • default[:ddnsupdate][:ddnssec][:file] (default: /etc/nsupdate.key): bind ddnssec key configuration file
  • default[:ddnsupdate][:ddnssec][:name] (default: nil): bind ddnssec key name
  • default[:ddnsupdate][:ddnssec][:algo] (default: HMAC-MD5): bind ddnssec key algo
  • default[:ddnsupdate][:ddnssec][:secret] (default: nil): bind dnssec secret
  • default[:ddnsupdate][:ddnssec][:template_cookbook] (default: ddnsupdate): bind dnssec configuration file template
  • default[:ddnsupdate][:ddnssec][:template_source] (default: nsupdate.key.erb): bind dnssec configuration file template

Cookbook host Attributes

  • default[:ddnsupdate][:host][:config] (default: /etc/nsupdate): ddnsupdate host nsupdate config file
  • default[:ddnsupdate][:host][:nsupdate_bin] (default: /usr/local/bin/host_nsupdate): nsupdate script for host
  • default[:ddnsupdate][:host][:zone] (default: node.domain): ddnsupdate host nsupdate config file
  • default[:ddnsupdate][:host][:reverse_zone] (default: /etc/nsupdate, required): ddnsupdate host nsupdate config file
  • default[:ddnsupdate][:host][:auto_fqdn_zone] (default: true): use node fqdn domain

Cookbook host nsupdate crond Attributes

  • default[:ddnsupdate][:ddnssec][:cron][:host][:minute] (default: */15): host nsupdate cron schedule minutes interval
  • default[:ddnsupdate][:ddnssec][:cron][:host][:hour] (default: *): host nsupdate cron schedule hour interval
  • default[:ddnsupdate][:ddnssec][:cron][:host][:user] (default: root): host nsupdate cron schedule user
  • default[:ddnsupdate][:ddnssec][:cron][:host][:action] (default: create): crond resource action, set it to delete to prevent cron schedule

Cookbook rr nsupdate Attributes

  • default[:ddnsupdate][:rr][:create] (default: {}): create dynamic dns records via nsupdate
  • default[:ddnsupdate][:rr][:delete] (default: {}): delete dynamic dns records via nsupdate

    Note: Check & LWRP Examples for advanced attributes.

Cookbook host Recipe Usage

Include recipe ddnsupdate::host to node run_list to manage Host DDNS A & PTR Records.

Cookbook rr Recipe Usage

Include recipe ddnsupdate::rr to a node run_list to manage DDNS RR via node attribute default[:ddnsupdate][:rr].

Note: This recipe does not require to be added to all the nodes, adding to one node or two is sufficient to manage RRs.

RR Create

Creating a RR is simple, but it is important to point out that RR value is an array and every time a value is added to a RR, it will keep appending it to existing RR.

May be in future purge will be added to action :create like :delete

RR Delete

Deleting a RR is also simple. Like action :create, :delete will only delete defined RR(s).

RR Delete with Purge

To purge all the RR values completely enable purge attribute for RR as defined in the LWRP examples.

Contributing

  1. Fork the repository on Github
  2. Create a named feature branch (like add_component_x)
  3. Write your change
  4. Write tests for your change (if applicable)
  5. Run the tests, ensuring they all pass
  6. Write description about changes
  7. Submit a Pull Request using Github

Authors:: Virender Khatri (vir.khatri@gmail.com)

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.

Dependent cookbooks

cron >= 1.2.0

Contingent cookbooks

There are no cookbooks that are contingent upon this one.

ddnsupdate CHANGELOG

This file is used to list changes made in each version of the ddnsupdate cookbook.

0.1.2

  • vkhatri - Initial release of ddnsupdate

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