L7-sysctl cookbook

Description

Configures sysctl system control parameters via Opscode Chef in /etc/sysctl.conf

Supported Platforms

• Ubuntu 12.04+
• Debian 7.0+

Recipes

• L7-sysctl - The default no-op recipe.
• Predefined parameters:
• L7-sysctl::basic_securty - Sets kernel level security settings.
• L7-sysctl::disable_ipv6 - If you do not use ipv6 then disable it.
• L7-sysctl::enable_forwarding - Enables ipv4 forwarding.
• L7-sysctl::less_swapping - Decrease swap ratio to 10 for less swapping.
• L7-sysctl::no_overcommit - Do not overcommit available memory.
• L7-sysctl::panic - Reboot on kernel panic.
• L7-sysctl::tune_conntrack - Increase connection tracking buffers.
• L7-sysctl::tune_shm - Increase shm.
• L7-sysctl::tune_tck_stack - Tune tcp stack for 1G/10G networks for higher throughput.
• L7-sysctl::tune_vfs - Tune vfs.
• L7-sysctl::disable_bridge_nf_call - Disable netfilter calls on bridged packets.
• L7-sysctl::ipv6_no_autoconfig - No autoconfig for ipv6.
• L7-sysctl::tcp_congestion_yeah - Sets the tcp congestion control to YeAH.
• L7-sysctl::tcp_fastopen - Enable client/server side tcp fast open.

Usage

• Include L7-sysctl::default recipe in your runlist.

• Place 'depends L7-sysctl' in the metadata of your cookbook.

• name: The sysctl parameter name.

• comment: Optional string for identification.

• value: Must be set to proper value.

• immediately: Optional true/false. Sets value at runtime or at the end of chef run. Default: false.

L7_sysctl 'net.ipv4.ip_forward' do
    comment 'Enable ip forwarding'
    value '1'
    immediately true
end

TODO

• Rewrite to LWRP

Contributing

1. Fork it
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Added some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create new Pull Request

License

• Freely distributable and licensed under the MIT license.
• Copyright (c) 2015 Gabor Szelcsanyi