72f2a1ffd4
Now that libcni has the ability to print a version message, plumb it through correctly. While we're at it, - fix import paths - run gofmt - add some more comments to sample - add container runtime swappability for release
tuning plugin
Overview
This plugin can change some system controls (sysctls) and several interface attributes (promiscuous mode, MTU and MAC address) in the network namespace. It does not create any network interfaces and therefore does not bring connectivity by itself. It is only useful when used in addition to other plugins.
System Controls Operation
The following network configuration file
{
"name": "mytuning",
"type": "tuning",
"sysctl": {
"net.core.somaxconn": "500"
}
}
will set /proc/sys/net/core/somaxconn to 500.
Other sysctls can be modified as long as they belong to the network namespace (/proc/sys/net/*).
A successful result would simply be:
{ }
Network sysctls documentation
Some network sysctls are documented in the Linux sources:
Interface Attribute Operation
The parameters, "mac", "mtu" and "promisc", changes the interface attributes as followings:
{
"name": "mytuning",
"type": "tuning",
"promisc": true,
"mac": "c2:b0:57:49:47:f1",
"mtu": 1454
}
Interface attribute configuration reference
mac(string, optional): MAC address (i.e. hardware address) of interfacemtu(integer, optional): MTU of interfacepromisc(bool, optional): Change the promiscuous mode of interface
Supported arguments
The following CNI_ARGS are supported:
-
MAC: request a specific MAC address for the interface(example: CNI_ARGS="IgnoreUnknown=true;MAC=c2:11:22:33:44:55")
Note: You may add IgnoreUnknown=true to allow loose CNI argument verification (see CNI's issue#560).