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cluster-search (7) Versions 1.0.0

Library to help searching cluster nodes in Chef cookbooks

Berkshelf/Librarian
Policyfile
Knife
cookbook 'cluster-search', '= 1.0.0'
cookbook 'cluster-search', '= 1.0.0', :supermarket
knife cookbook site install cluster-search
knife cookbook site download cluster-search
README
Dependencies
Quality

Cluster Search

Description

Cluster Search (cluster-search) is a simple cookbook library which simplify the search of members of a cluster. It relies on Chef search with a size guard (to avoid inconsistencies during initial convergence) and allows a fall-back to hostname listing if user does not want to rely on searches (because of chef-solo for example).

Usage

First, call ::Chef::Recipe.send(:include, ClusterSearch) to be able to use cluster_search in your recipe.

Then method cluster_search take one argument, a hash which could contain:

  • role and size to use search. Ex: { role: my_search, size: 2 }
  • or hosts to use a static list. Ex: { hosts: [ some_node ] }

If both are defined, hosts is used.

It returns the list of the members of a cluster hosts and current node ID my_id for this cluster (or -1 it is not a member).

For search, we suppose that all members of a cluster have a common role in their run-list. For instance, all zookeeper nodes of a dedicated cluster for kafka could use role zookeeper-kafka. By defining role to zookeeper-kafka and configuring size to the expected size of the cluster, we can find all the cluster members.

We can find input/output examples (used for test cases) in file .kitchen.yml.

Changes

1.0.0:

  • Initial version, tested with full kitchen suites

Requirements

None. Should work on any platform.

Libraries

default

Implements cluster_search method.

Recipes

default

Recipe used for testing.

Contributing

You are more than welcome to submit issues and merge requests to this project.

Commits

Your commits must pass git log --check and messages should be formated like this (based on this excellent post):

Summarize change in 50 characters or less

Provide more detail after the first line. Leave one blank line below the
summary and wrap all lines at 72 characters or less.

If the change fixes an issue, leave another blank line after the final
paragraph and indicate which issue is fixed in the specific format
below.

Fix #42

Also do your best to factor commits appropriately, ie not too large with unrelated things in the same commit, and not too small with the same small change applied N times in N different commits. If there was some accidental reformatting or whitespace changes during the course of your commits, please rebase them away before submitting the PR.

Files

All files must be 80 columns width formatted (actually 79), exception when it is not possible.

License and Author

Copyright:: 2015, Sam4Mobile

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.

Foodcritic Metric
            

1.0.0 passed this metric