Description
Set sysctl values from Chef!
Attributes
-
‘node` - A namespace for sysctl settings.
Usage
There are two ways of setting sysctl values:
-
Set chef attributes in the sysctl namespace. e.g.:
node.set['sysctl']['set swappiness'] = { 'vm.swappiness' => '20' }
-
Set values in a ‘cookbook_file` Resource.
-
With Ressource/Provider.
Resource/Provider
This Cookbook includes two LWRPs:
-
sysctl
-
sysctl_multi
sysctl
## Actions
-
:save - Save and set a sysctl value (default).
-
:set - Set a sysctl value.
-
:remove - Remove a (previous set) sysctl.
## Attribute Parameters
-
variable - Variable to manage. e.g. ‘net.ipv4.ip_forward`, `vm.swappiness`.
-
value - Value to affect to variable. e.g. ‘1`, `0`.
-
path - Path to a specific file.
## Examples
“‘ruby # Set ’vm.swappiness’ to ‘60’. Will create /etc/sysctl.d/40-vm.wappiness.conf sysctl ‘vm.swappiness’ do
value '40'
end
# the same. will create /etc/sysctl.d/40-vm_swappiness_to_60.conf sysctl ‘vm swappiness to 60’ do
variable 'vm.swappiness' value '60'
end
# Remove /etc/sysctl.d/40-ip_config.conf sysctl ‘ip config’ do
action :remove
end
# Set swappiness but don’t save it. sysctl ‘vm.swappiness’ do
action :set value '40'
end “‘
sysctl_multi
## Actions
-
:save - Save and set a sysctl value (default).
-
:set - set a sysctl value.
-
:remove - remove a (previous set) sysctl.
## Attribute Parameters
-
instructions - Hash with instruction. e.g. ‘{variable => value, variable2 => value2}`. Override use of ’variable’ and ‘value’.
-
path - Path to a specific file.
## Examples
“‘ruby # set multi variables. will create /etc/sysctl.d/69-ip_config.conf sysctl_multi ’ip config’ do
instructions {
'net.ipv4.ip_forward' => '1',
'net.ipv6.conf.all.forwarding' => '1',
'net.ipv4.tcp_syncookies' => '1'}
end “‘