Skip to content
Latest commit a9f7e13 May 1, 2014 Travis Dempsey committed with Gerrit Code Review Fix: Suppress Constant Redefine
Makes other cookbooks' specs cleaner.

Squashed commit of the following:

commit 7aec255008225c203d5f9005c3148bcd5ba55f20
Author: Travis Dempsey <>
Date:   Thu May 1 15:42:44 2014 -0500

    squash constant redefine warning when loading silverware cookbook more than once

    Change-Id: I6c5a7fa0c1f4a98f504f359bd469f6b9bcc0c9bb

Change-Id: I89244c1142d63722819e39014b7fb1809d3be9d6
Failed to load latest commit information.


The Silverware Cookbook is part of the Ironfan Pantry cookbooks. Silverware Cookbook coordinates discovery of services, for example "list all the machines for awesome_webapp, that I might load balance them", and aspects, for example, "list all components that write logs, that I might logrotate them, or that I might monitor the free space on their volumes".

Silverware Chef Cookbook

Cluster orchestration -- coordinates discovery, integration and decoupling of cookbooks

Attributes are scoped by cookbook and then by component.

  • If I declare announce(:redis), it will look in node[:redis].
  • If I declare announce(:hadoop, :namenode), it will look in node[:hadoop] for cookbook-wide concerns and node[:hadoop][:namenode] for component-specific concerns.
  • The cookbook scope is always named for its cookbook. Its attributes live innode[:cookbook_name]. If everything in the cookbook shares a concern, it sits at cookbook level. So the Hadoop log directory (shared by all its components) is at (scratch_root)/hadoop/log.
  • If there is only one component, it can be implicitly named for its cookbook. In this case, it is omitted: the component attributes live in node[:cookbook_name] (which is the same as the component name).
  • If there are multiple components, they will live in node[:cookbook_name][:component_name] (eg [:hadoop][:namenode] or [:flume][:master].


Allow nodes to discover the location for a given service at runtime, adapting when new services register.


  • register for a service. A timestamp records the last registry.
  • discover all chef nodes that have registered for the given service.
  • discover the most recent chef node for that service.
  • get the 'public_ip' for a service -- the address that nodes in the larger world should use
  • get the 'private_ip' for a service -- the address that nodes on the local subnet / private cloud should use
  • get the 'private_hostname' for a service -- the hostname that nodes on the local subnet / private cloud should use


Nodes register a service by calling announce(<service>[,<component>]), which adds a hash to node[:announces][][], containing 'timestamp' (the time of registry) and other metadata passed in. Nodes discover services by calling discover(<service>[,<component>[,<realm>]]), where realm is the scope of the discovery (the current cluster, by default).


  • default - Base configuration for silverware


Supports platforms: Debian and Ubuntu


  • [:silverware][:conf_dir] - (default: "/etc/silverware")
  • [:silverware][:log_dir] - (default: "/var/log/silverware")
  • [:silverware][:home_dir] - (default: "/etc/silverware")
  • [:silverware][:user] - (default: "root")
  • [:users][:root][:primary_group] - (default: "root")

License and Author

Author:: Philip (flip) Kromer - Infochimps, Inc ( Copyright:: 2011, Philip (flip) Kromer - Infochimps, 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

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.

readme generated by ironfan's cookbook_munger

Something went wrong with that request. Please try again.