cookbook 'sysctl', '= 0.3.5', :supermarket
Configures sysctl parameters
cookbook 'sysctl', '= 0.3.5'
knife cookbook site install sysctl
knife cookbook site download sysctl
Set sysctl system control parameters via Opscode Chef
- Scientific Linux
- PLD Linux (not tested)
- node['sysctl']['params'] - A namespace for setting sysctl parameters
- node['sysctl']['conf_dir'] - Specifies the sysctl.d directory to be used. Defaults to /etc/sysctl.d on the Debian and RHEL platform families, otherwise nil
- node['sysctl']['allow_sysctl_conf'] - Defaults to false. Using conf_dir is highly recommended. On some platforms that is not supported. For those platforms, set this to true and the cookbook will rewrite the /etc/sysctl.conf file directly with the params provided. Be sure to save any local edits of /etc/sysctl.conf before enabling this to avoid losing them.
- apply (default)
# set vm.swapiness to 20 via attributes node.default['sysctl']['params']['vm']['swappiness'] = 20 # set vm.swapiness to 20 via sysctl_param LWRP sysctl_param 'vm.swappiness' do value 20 end # remove sysctl parameter and set net.ipv4.tcp_fin_timeout back to default sysctl_param 'net.ipv4.tcp_fin_timeout' do value 30 action :remove end
This cookbook can be tested using vagrant, but it depends on the following vagrant plugins
vagrant plugin install vagrant-omnibus vagrant plugin install vagrant-berkshelf
Tested with * Vagrant (version 1.4.0) * vagrant-berkshelf (1.3.5) * vagrant-omnibus (1.1.2)
Much of the tooling around this cookbook is exposed via thor and test kitchen, so it is highly recommended to learn more about those tools. However, to give a quick glance at how to do some tests, you can execute the following commmands
bundle install bundle exec rubocop bundle exec thor foodcritic:lint bundle exec kitchen test default-ubuntu-1204 bundle exec kitchen test default-centos-64
The above will do ruby style (rubocop) and cookbook style (foodcritic) checks followed by ensuring proper cookbook operation on two separate linux platforms (Ubuntu 12.04 LTS Precise 64-bit and CentOS 6.4). Please run the tests on any pull requests that you are about to submit and write tests for defects or new features to ensure backwards compatibility and a stable cookbook that we can all rely upon.
This coobook is also setup to run the style checks while you work via the guard gem.
There are a lot of different documents that talk about system control parameters, the hope here is to point to some of the most useful ones to provide more guidance as to what the possible kernel parameters are and what they mean.
This cookbook has no specified dependencies.