Xuewei Niu 3958a39d07 runtime-rs: Introduce directly attachable network ...

Kata containers as VM-based containers are allowed to run in the host
netns. That is, the network is able to isolate in the L2. The network
performance will benefit from this architecture, which eliminates as many
hops as possible. We called it a Directly Attachable Network (DAN for
short).

The network devices are placed at the host netns by the CNI plugins. The
configs are saved at {dan_conf}/{sandbox_id}.json in the format of JSON,
including device name, type, and network info. At the very beginning stage,
the DAN only supports host tap devices. More devices, like the DPDK, will
be supported in later versions.

The format of file looks like as below:

```json
{
	"netns": "/path/to/netns",
	"devices": [{
		"name": "eth0",
		"guest_mac": "xx:xx:xx:xx:xx",
		"device": {
			"type": "vhost-user",
			"path": "/tmp/test",
			"queue_num": 1,
			"queue_size": 1
		},
		"network_info": {
			"interface": {
				"ip_addresses": ["192.168.0.1/24"],
				"mtu": 1500,
				"ntype": "tuntap",
				"flags": 0
			},
			"routes": [{
				"dest": "172.18.0.0/16",
				"source": "172.18.0.1",
				"gateway": "172.18.31.1",
				"scope": 0,
				"flags": 0
			}],
			"neighbors": [{
				"ip_address": "192.168.0.3/16",
				"device": "",
				"state": 0,
				"flags": 0,
				"hardware_addr": "xx:xx:xx:xx:xx"
			}]
		}
	}]
}
```

Fixes: #1922

Signed-off-by: Xuewei Niu <niuxuewei.nxw@antgroup.com>

2023-08-03 15:33:34 +08:00

..

configuration-dragonball.toml.in

runtime-rs: Introduce directly attachable network

2023-08-03 15:33:34 +08:00