Tomofumi Hayashi 6da1cb7876 Support CNI_ARGS in static IPAM plugin

This change is to add CNI_ARGS support in static IPAM plugin.
When IP/SUBNET/GATEWAY are given in CNI_ARGS, static IPAM adds
these info in addition to config files.

To configure ip address only from CNI_ARGS, 'address' field in config
is changed to optional from required.

2018-06-18 16:18:47 +09:00

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static IP address management plugin

Overview

static IPAM is very simple IPAM plugin that assigns IPv4 and IPv6 addresses statically to container. This will be useful in debugging purpose and in case of assign same IP address in different vlan/vxlan to containers.

Example configuration

{
	"ipam": {
		"type": "static",
		"addresses": [
			{
				"address": "10.10.0.1/24",
				"gateway": "10.10.0.254"
			},
			{
				"address": "3ffe:ffff:0:01ff::1/64",
				"gateway": "3ffe:ffff:0::1"
			}
		],
		"routes": [
			{ "dst": "0.0.0.0/0" },
			{ "dst": "192.168.0.0/16", "gw": "10.10.5.1" },
			{ "dst": "3ffe:ffff:0:01ff::1/64" }
		],
		"dns": {
			"nameservers" : ["8.8.8.8"],
			"domain": "example.com",
			"search": [ "example.com" ]
		}
	}
}

Network configuration reference

type (string, required): "static"
addresses (array, optional): an array of arrays of ip address objects:
- address (string, required): CIDR notation IP address.
- gateway (string, optional): IP inside of "subnet" to designate as the gateway.
routes (string, optional): list of routes add to the container namespace. Each route is a dictionary with "dst" and optional "gw" fields. If "gw" is omitted, value of "gateway" will be used.
dns (string, optional): the dictionary with "nameservers", "domain" and "search".

Supported arguments

The following CNI_ARGS are supported:

IP: request a specific IP address from a subnet
SUBNET: request a specific subnet
GATEWAY: request a specific gateway address

(example: CNI_ARGS="IP=10.10.0.1;SUBNET=10.10.0.0/24;GATEWAY=10.10.0.254")

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