ConfigDrive / cloud-init supports a *network_data.json* file which can contain
network information for a VM.
By providing the network information using ConfigDrive to a VM we can
eliminate the need for DHCP and thus the Virtual Router in some use-cases.
An example JSON file:
<pre>
{
"links": [
{
"ethernet_mac_address": "52:54:00:0d:bf:93",
"id": "eth0",
"mtu": 1500,
"type": "phy"
}
],
"networks": [
{
"id": "eth0",
"ip_address": "192.168.200.200",
"link": "eth0",
"netmask": "255.255.255.0",
"network_id": "dacd568d-5be6-4786-91fe-750c374b78b4",
"routes": [
{
"gateway": "192.168.200.1",
"netmask": "0.0.0.0",
"network": "0.0.0.0"
}
],
"type": "ipv4"
},
{
"id": "eth0",
"ip_address": "2001:db8:100::1337",
"link": "eth0",
"netmask": "64",
"network_id": "dacd568d-5be6-4786-91fe-750c374b78b4",
"routes": [
{
"gateway": "2001:db8:100::1",
"netmask": "0",
"network": "::"
}
],
"type": "ipv6"
}
],
"services": [
{
"address": "8.8.8.8",
"type": "dns"
}
]
}
</pre>
In Basic Networking and Advanced Networking zones which are using a shared
network you wouldn't require a VR anymore.
[ Full content available at: https://github.com/apache/cloudstack/issues/2872 ]
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