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Sample changes for dualstack testing. #108

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25 changes: 25 additions & 0 deletions cni/cni.go
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Original file line number Diff line number Diff line change
Expand Up @@ -70,6 +70,7 @@ type NetworkConfig struct {
Name string `json:"name"` // Name is the Network Name. We would also use this as the Type of HNS Network
Type string `json:"type"` // As per SPEC, Type is Name of the Binary
Ipam IpamConfig `json:"ipam"`
Ipamv6 IpamConfig `json:"ipamv6"`
DNS cniTypes.DNS `json:"dns"`
OptionalFlags OptionalFlags `json:"optionalFlags"`
RuntimeConfig RuntimeConfig `json:"runtimeConfig"`
Expand Down Expand Up @@ -225,6 +226,30 @@ func (config *NetworkConfig) GetNetworkInfo(podNamespace string) (ninfo *network
subnets = append(subnets, subnet)
}

if config.OptionalFlags.EnableDualStack && config.Ipamv6.Subnet != "" {
ip, s, _ := net.ParseCIDR(config.Ipamv6.Subnet)
if ip.To4() == nil && len(ip) == net.IPv6len {
gatewayIP := make(net.IP, len(ip))
copy(gatewayIP, ip)
// Find the first IP in the subnet (usually the gateway)
for i := len(gatewayIP) - 1; i >= 0; i-- {
gatewayIP[i]++
if gatewayIP[i] != 0 {
break
}
}
if config.Ipamv6.Routes != nil && len(config.Ipamv6.Routes) > 0 && config.Ipamv6.Routes[0].GW != nil {
gatewayIP = config.Ipamv6.Routes[0].GW
}
subnet := network.SubnetInfo{
AddressPrefix: *s,
GatewayAddress: gatewayIP,
Policies: []network.Policy{},
}
subnets = append(subnets, subnet)
}
}

if len(config.DNS.Search) > 0 {
if podNamespace != "" {
config.DNS.Search[0] = podNamespace + "." + config.DNS.Search[0]
Expand Down
78 changes: 78 additions & 0 deletions example/cni_dualstack_sample.conf
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@@ -0,0 +1,78 @@
{
"cniVersion": "0.2.0",
"name": "ContainerHostA",
"type": "sdnbridge",
"master": "Ethernet",
"capabilities": {
"portMappings": true,
"dns" : true
},
"ipam": {
"environment": "azure",
"subnet": "192.168.100.0/24",
"routes": [
{
"GW": "192.168.100.2"
}
]
},
"ipamv6": {
"environment": "azure",
"subnet": "10::06/64",
"routes": [
{
"GW": "10::02"
}
]
},
"dns": {
"Nameservers": [
"168.63.129.16"
],
"Search": [
"svc.cluster.local"
]
},
"optionalFlags" : {
"localRoutedPortMapping" : true,
"allowAclPortMapping" : true,
"enableDualStack" : true
},
"AdditionalArgs": [
{
"Name": "EndpointPolicy",
"Value": {
"Type": "OutBoundNAT",
"Settings": {
"Exceptions": [
"192.168.100.0/24",
"192.168.100.2/32"
]
}
}
}
,{
"Name": "EndpointPolicy",
"Value": {
"Type":"ACL",
"Settings": {
"Action": "Allow",
"Direction": "Out",
"Priority": 2000
}
}
}
,{
"Name": "EndpointPolicy",
"Value": {
"Type":"ACL",
"Settings": {
"Action": "Allow",
"Direction": "In",
"Priority": 2000
}
}
}

]
}
14 changes: 13 additions & 1 deletion scripts/autogencniconf/generateCNIConfig.ps1
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Expand Up @@ -70,6 +70,7 @@ enum WKOptionalKeysFlag {
Ipam = 2 #[WKOptionalKeysFlag]::NoWKOptKeys -shl 1
Dns = 4 #[WKOptionalKeysFlag]::NoWKOptKeys -shl 2
MaxFlags = 8 #[WKOptionalKeysFlag]::NoWKOptKeys -shl 3
Ipamv6 = 16 #[WKOptionalKeysFlag]::NoWKOptKeys -shl 4
}

class Policy {
Expand Down Expand Up @@ -181,7 +182,7 @@ class CniConf {
# Set optional fields to be populated
$this.OptKeyParams = $this.OptKeyParams -bor [OptionalKeysFlag]::Capabilities -bor [OptionalKeysFlag]::Master
# Set wellknown optional fields to be populated
$this.WKOptKeyParams = $this.WKOptKeyParams -bor [WKOptionalKeysFlag]::Dns -bor [WKOptionalKeysFlag]::Ipam
$this.WKOptKeyParams = $this.WKOptKeyParams -bor [WKOptionalKeysFlag]::Dns -bor [WKOptionalKeysFlag]::Ipam -bor [WKOptionalKeysFlag]::Ipamv6
}

EnsureMandatoryParametersPresent([System.Object] $cniArgs) {
Expand Down Expand Up @@ -245,6 +246,17 @@ class CniConf {
$this.CniBase.Add('ipam', $ipamFields)
}

([WKOptionalKeysFlag]::Ipamv6).value__ {
$ipamFields = [System.Collections.Specialized.OrderedDictionary]::new()
$ipamFields.Add('environment', 'azure')
$ipamFields.Add('subnet', $this.Args.Subnet)
$routes = @()
$routes += (@{'GW'=$this.Args.Gateway;})
$ipamFields.Add('routes', $routes)

$this.CniBase.Add('ipamv6', $ipamFields)
}

([WKOptionalKeysFlag]::Dns).value__ {
$dnsFields = [System.Collections.Specialized.OrderedDictionary]::new()
$nameservers = @()
Expand Down
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