/
loadbalancers.go
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/
loadbalancers.go
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// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT license.
package engine
import (
"fmt"
"strconv"
"github.com/Azure/aks-engine-azurestack/pkg/api"
"github.com/Azure/azure-sdk-for-go/services/network/mgmt/2018-08-01/network"
"github.com/Azure/go-autorest/autorest/to"
"github.com/blang/semver"
)
// CreateClusterLoadBalancerForIPv6 creates the cluster loadbalancer with IPv4 and IPv6 FE config
// this loadbalancer is created for the ipv6 dual stack feature and configured with 1 ipv4 FE, 1 ipv6 FE
// and 2 backend address pools - v4 and v6, 2 rules - v4 and v6. Atleast existence of 1 rule is a
// requirement now to allow egress. This can be removed later.
// TODO (aramase)
func CreateClusterLoadBalancerForIPv6() LoadBalancerARM {
loadbalancer := LoadBalancerARM{
ARMResource: ARMResource{
APIVersion: "[variables('apiVersionNetwork')]",
DependsOn: []string{
"[concat('Microsoft.Network/publicIPAddresses/', 'fee-ipv4')]",
},
},
LoadBalancer: network.LoadBalancer{
Location: to.StringPtr("[variables('location')]"),
Name: to.StringPtr("[parameters('masterEndpointDNSNamePrefix')]"),
LoadBalancerPropertiesFormat: &network.LoadBalancerPropertiesFormat{
BackendAddressPools: &[]network.BackendAddressPool{
{
// cluster name used as backend addr pool name for ipv4 to ensure backward compat
Name: to.StringPtr("[parameters('masterEndpointDNSNamePrefix')]"),
},
},
FrontendIPConfigurations: &[]network.FrontendIPConfiguration{
{
Name: to.StringPtr("LBFE-v4"),
FrontendIPConfigurationPropertiesFormat: &network.FrontendIPConfigurationPropertiesFormat{
PublicIPAddress: &network.PublicIPAddress{
ID: to.StringPtr("[resourceId('Microsoft.Network/publicIpAddresses', 'fee-ipv4')]"),
},
},
},
},
LoadBalancingRules: &[]network.LoadBalancingRule{
{
Name: to.StringPtr("LBRuleIPv4"),
LoadBalancingRulePropertiesFormat: &network.LoadBalancingRulePropertiesFormat{
FrontendIPConfiguration: &network.SubResource{
ID: to.StringPtr("[resourceId('Microsoft.Network/loadBalancers/frontendIpConfigurations', parameters('masterEndpointDNSNamePrefix'), 'LBFE-v4')]"),
},
BackendAddressPool: &network.SubResource{
ID: to.StringPtr("[resourceId('Microsoft.Network/loadBalancers/backendAddressPools', parameters('masterEndpointDNSNamePrefix'), parameters('masterEndpointDNSNamePrefix'))]"),
},
Protocol: network.TransportProtocolTCP,
FrontendPort: to.Int32Ptr(9090),
BackendPort: to.Int32Ptr(9090),
},
},
},
},
Sku: &network.LoadBalancerSku{
Name: "[variables('loadBalancerSku')]",
},
Type: to.StringPtr("Microsoft.Network/loadBalancers"),
},
}
return loadbalancer
}
// CreateMasterLoadBalancer creates a master LB
// In a private cluster scenario, we don't attach the inbound foo, e.g., TCP 443 and SSH access
func CreateMasterLoadBalancer(prop *api.Properties, isVMSS bool) LoadBalancerARM {
loadBalancer := LoadBalancerARM{
ARMResource: ARMResource{
APIVersion: "[variables('apiVersionNetwork')]",
DependsOn: []string{
"[concat('Microsoft.Network/publicIPAddresses/', variables('masterPublicIPAddressName'))]",
},
},
LoadBalancer: network.LoadBalancer{
Location: to.StringPtr("[variables('location')]"),
Name: to.StringPtr("[variables('masterLbName')]"),
LoadBalancerPropertiesFormat: &network.LoadBalancerPropertiesFormat{
BackendAddressPools: &[]network.BackendAddressPool{
{
Name: to.StringPtr("[variables('masterLbBackendPoolName')]"),
},
},
FrontendIPConfigurations: &[]network.FrontendIPConfiguration{
{
Name: to.StringPtr("[variables('masterLbIPConfigName')]"),
FrontendIPConfigurationPropertiesFormat: &network.FrontendIPConfigurationPropertiesFormat{
PublicIPAddress: &network.PublicIPAddress{
ID: to.StringPtr("[resourceId('Microsoft.Network/publicIpAddresses',variables('masterPublicIPAddressName'))]"),
},
},
},
},
},
Sku: &network.LoadBalancerSku{
Name: "[variables('loadBalancerSku')]",
},
Type: to.StringPtr("Microsoft.Network/loadBalancers"),
},
}
if !prop.OrchestratorProfile.IsPrivateCluster() {
loadBalancingRules := &[]network.LoadBalancingRule{
{
Name: to.StringPtr("LBRuleHTTPS"),
LoadBalancingRulePropertiesFormat: &network.LoadBalancingRulePropertiesFormat{
FrontendIPConfiguration: &network.SubResource{
ID: to.StringPtr("[variables('masterLbIPConfigID')]"),
},
BackendAddressPool: &network.SubResource{
ID: to.StringPtr("[concat(variables('masterLbID'), '/backendAddressPools/', variables('masterLbBackendPoolName'))]"),
},
Protocol: network.TransportProtocolTCP,
FrontendPort: to.Int32Ptr(443),
BackendPort: to.Int32Ptr(443),
EnableFloatingIP: to.BoolPtr(false),
IdleTimeoutInMinutes: to.Int32Ptr(5),
LoadDistribution: network.Default,
Probe: &network.SubResource{
ID: to.StringPtr("[concat(variables('masterLbID'),'/probes/tcpHTTPSProbe')]"),
},
},
},
}
probes := &[]network.Probe{
{
Name: to.StringPtr("tcpHTTPSProbe"),
ProbePropertiesFormat: &network.ProbePropertiesFormat{
Protocol: network.ProbeProtocolTCP,
Port: to.Int32Ptr(443),
IntervalInSeconds: to.Int32Ptr(5),
NumberOfProbes: to.Int32Ptr(2),
},
},
}
loadBalancer.LoadBalancer.LoadBalancerPropertiesFormat.LoadBalancingRules = loadBalancingRules
loadBalancer.LoadBalancer.LoadBalancerPropertiesFormat.Probes = probes
if prop.OrchestratorProfile.KubernetesConfig.LoadBalancerSku == api.StandardLoadBalancerSku {
udpRule := network.LoadBalancingRule{
Name: to.StringPtr("LBRuleUDP"),
LoadBalancingRulePropertiesFormat: &network.LoadBalancingRulePropertiesFormat{
FrontendIPConfiguration: &network.SubResource{
ID: to.StringPtr("[variables('masterLbIPConfigID')]"),
},
BackendAddressPool: &network.SubResource{
ID: to.StringPtr("[concat(variables('masterLbID'), '/backendAddressPools/', variables('masterLbBackendPoolName'))]"),
},
Protocol: network.TransportProtocolUDP,
FrontendPort: to.Int32Ptr(1123),
BackendPort: to.Int32Ptr(1123),
EnableFloatingIP: to.BoolPtr(false),
IdleTimeoutInMinutes: to.Int32Ptr(5),
LoadDistribution: network.Default,
Probe: &network.SubResource{
ID: to.StringPtr("[concat(variables('masterLbID'),'/probes/tcpHTTPSProbe')]"),
},
},
}
*loadBalancer.LoadBalancer.LoadBalancerPropertiesFormat.LoadBalancingRules = append(*loadBalancer.LoadBalancer.LoadBalancerPropertiesFormat.LoadBalancingRules, udpRule)
}
if isVMSS {
inboundNATPools := []network.InboundNatPool{
{
Name: to.StringPtr("[concat('SSH-', variables('masterVMNamePrefix'), 'natpools')]"),
InboundNatPoolPropertiesFormat: &network.InboundNatPoolPropertiesFormat{
FrontendIPConfiguration: &network.SubResource{
ID: to.StringPtr("[variables('masterLbIPConfigID')]"),
},
Protocol: network.TransportProtocolTCP,
BackendPort: to.Int32Ptr(22),
FrontendPortRangeStart: to.Int32Ptr(50001),
FrontendPortRangeEnd: to.Int32Ptr(50119),
EnableFloatingIP: to.BoolPtr(false),
},
},
}
loadBalancer.InboundNatPools = &inboundNATPools
} else {
var inboundNATRules []network.InboundNatRule
sshNATPorts := []int32{
22,
2201,
2202,
2203,
2204,
}
for i := 0; i < prop.MasterProfile.Count; i++ {
inboundNATRule := network.InboundNatRule{
Name: to.StringPtr(fmt.Sprintf("[concat('SSH-', variables('masterVMNamePrefix'), %d)]", i)),
InboundNatRulePropertiesFormat: &network.InboundNatRulePropertiesFormat{
BackendPort: to.Int32Ptr(22),
EnableFloatingIP: to.BoolPtr(false),
FrontendIPConfiguration: &network.SubResource{
ID: to.StringPtr("[variables('masterLbIPConfigID')]"),
},
FrontendPort: to.Int32Ptr(sshNATPorts[i]),
Protocol: network.TransportProtocolTCP,
},
}
inboundNATRules = append(inboundNATRules, inboundNATRule)
}
loadBalancer.InboundNatRules = &inboundNATRules
}
} else {
outboundRules := createOutboundRules(prop)
outboundRule := (*outboundRules)[0]
outboundRule.OutboundRulePropertiesFormat.BackendAddressPool.ID = to.StringPtr("[concat(variables('masterLbID'), '/backendAddressPools/', variables('masterLbBackendPoolName'))]")
(*outboundRule.OutboundRulePropertiesFormat.FrontendIPConfigurations)[0].ID = to.StringPtr("[variables('masterLbIPConfigID')]")
loadBalancer.LoadBalancer.LoadBalancerPropertiesFormat.OutboundRules = outboundRules
}
return loadBalancer
}
func createOutboundRules(prop *api.Properties) *[]network.OutboundRule {
currentVersion, _ := semver.Make(prop.OrchestratorProfile.OrchestratorVersion)
min13Version, _ := semver.Make("1.13.7")
min14Version, _ := semver.Make("1.14.3")
min15Version, _ := semver.Make("1.15.0")
if currentVersion.LT(min13Version) ||
(currentVersion.Major == min14Version.Major && currentVersion.Minor == min14Version.Minor && currentVersion.LT(min14Version)) ||
(currentVersion.Major == min15Version.Major && currentVersion.Minor == min15Version.Minor && currentVersion.LT(min15Version)) {
return &[]network.OutboundRule{
{
Name: to.StringPtr("LBOutboundRule"),
OutboundRulePropertiesFormat: &network.OutboundRulePropertiesFormat{
FrontendIPConfigurations: &[]network.SubResource{
{
ID: to.StringPtr("[variables('agentLbIPConfigID')]"),
},
},
BackendAddressPool: &network.SubResource{
ID: to.StringPtr("[concat(variables('agentLbID'), '/backendAddressPools/', variables('agentLbBackendPoolName'))]"),
},
Protocol: network.Protocol1All,
IdleTimeoutInMinutes: to.Int32Ptr(prop.OrchestratorProfile.KubernetesConfig.OutboundRuleIdleTimeoutInMinutes),
AllocatedOutboundPorts: to.Int32Ptr(0),
},
},
}
}
outboundRule := network.OutboundRule{
Name: to.StringPtr("LBOutboundRule"),
OutboundRulePropertiesFormat: &network.OutboundRulePropertiesFormat{
BackendAddressPool: &network.SubResource{
ID: to.StringPtr("[concat(variables('agentLbID'), '/backendAddressPools/', variables('agentLbBackendPoolName'))]"),
},
Protocol: network.Protocol1All,
IdleTimeoutInMinutes: to.Int32Ptr(prop.OrchestratorProfile.KubernetesConfig.OutboundRuleIdleTimeoutInMinutes),
EnableTCPReset: to.BoolPtr(true),
AllocatedOutboundPorts: to.Int32Ptr(0),
},
}
numIps := 1
if prop.OrchestratorProfile.KubernetesConfig.LoadBalancerOutboundIPs != nil {
numIps = *prop.OrchestratorProfile.KubernetesConfig.LoadBalancerOutboundIPs
}
agentLbIPConfigIDPrefix := "agentLbIPConfigID"
frontendIPConfigurations := &[]network.SubResource{}
for i := 1; i <= numIps; i++ {
name := agentLbIPConfigIDPrefix
if i > 1 {
name += strconv.Itoa(i)
}
*frontendIPConfigurations = append(*frontendIPConfigurations, network.SubResource{
ID: to.StringPtr(fmt.Sprintf("[variables('%s')]", name)),
})
}
outboundRule.OutboundRulePropertiesFormat.FrontendIPConfigurations = frontendIPConfigurations
return &[]network.OutboundRule{outboundRule}
}
// CreateStandardLoadBalancerForNodePools returns an ARM resource for the Standard LB that has all nodes in its backend pool
func CreateStandardLoadBalancerForNodePools(prop *api.Properties, isVMSS bool) LoadBalancerARM {
loadBalancer := LoadBalancerARM{
ARMResource: ARMResource{
APIVersion: "[variables('apiVersionNetwork')]",
DependsOn: []string{
"[concat('Microsoft.Network/publicIPAddresses/', variables('agentPublicIPAddressName'))]",
},
},
LoadBalancer: network.LoadBalancer{
Location: to.StringPtr("[variables('location')]"),
Name: to.StringPtr("[variables('agentLbName')]"),
LoadBalancerPropertiesFormat: &network.LoadBalancerPropertiesFormat{
BackendAddressPools: &[]network.BackendAddressPool{
{
Name: to.StringPtr("[variables('agentLbBackendPoolName')]"),
},
},
OutboundRules: createOutboundRules(prop),
},
Sku: &network.LoadBalancerSku{
Name: "[variables('loadBalancerSku')]",
},
Type: to.StringPtr("Microsoft.Network/loadBalancers"),
},
}
numIps := 1
if prop.OrchestratorProfile.KubernetesConfig.LoadBalancerOutboundIPs != nil {
numIps = *prop.OrchestratorProfile.KubernetesConfig.LoadBalancerOutboundIPs
}
agentPublicIPAddressNamePrefix := "agentPublicIPAddressName"
agentLbIPConfigNamePrefix := "agentLbIPConfigName"
frontendIPConfigurations := &[]network.FrontendIPConfiguration{}
for i := 1; i <= numIps; i++ {
agentPublicIPAddressName := agentPublicIPAddressNamePrefix
agentLbIPConfigName := agentLbIPConfigNamePrefix
if i > 1 {
agentPublicIPAddressName += strconv.Itoa(i)
agentLbIPConfigName += strconv.Itoa(i)
}
*frontendIPConfigurations = append(*frontendIPConfigurations, network.FrontendIPConfiguration{
Name: to.StringPtr(fmt.Sprintf("[variables('%s')]", agentLbIPConfigName)),
FrontendIPConfigurationPropertiesFormat: &network.FrontendIPConfigurationPropertiesFormat{
PublicIPAddress: &network.PublicIPAddress{
ID: to.StringPtr(fmt.Sprintf("[resourceId('Microsoft.Network/publicIpAddresses',variables('%s'))]", agentPublicIPAddressName)),
},
},
})
}
loadBalancer.LoadBalancer.LoadBalancerPropertiesFormat.FrontendIPConfigurations = frontendIPConfigurations
return loadBalancer
}
func CreateMasterInternalLoadBalancer(cs *api.ContainerService) LoadBalancerARM {
var dependencies []string
if cs.Properties.MasterProfile.IsCustomVNET() {
dependencies = append(dependencies, "[variables('nsgID')]")
} else {
dependencies = append(dependencies, "[variables('vnetID')]")
}
armResource := ARMResource{
APIVersion: "[variables('apiVersionNetwork')]",
DependsOn: dependencies,
}
subnet := "[variables('vnetSubnetID')]"
if cs.Properties.MasterProfile.IsVirtualMachineScaleSets() {
subnet = "[variables('vnetSubnetIDMaster')]"
}
loadBalancer := network.LoadBalancer{
Location: to.StringPtr("[variables('location')]"),
Name: to.StringPtr("[variables('masterInternalLbName')]"),
LoadBalancerPropertiesFormat: &network.LoadBalancerPropertiesFormat{
BackendAddressPools: &[]network.BackendAddressPool{
{
Name: to.StringPtr("[variables('masterLbBackendPoolName')]"),
},
},
FrontendIPConfigurations: &[]network.FrontendIPConfiguration{
{
Name: to.StringPtr("[variables('masterInternalLbIPConfigName')]"),
FrontendIPConfigurationPropertiesFormat: &network.FrontendIPConfigurationPropertiesFormat{
PrivateIPAddress: to.StringPtr("[variables('kubernetesAPIServerIP')]"),
PrivateIPAllocationMethod: network.Static,
Subnet: &network.Subnet{
ID: to.StringPtr(subnet),
},
},
},
},
LoadBalancingRules: &[]network.LoadBalancingRule{
{
Name: to.StringPtr("InternalLBRuleHTTPS"),
LoadBalancingRulePropertiesFormat: &network.LoadBalancingRulePropertiesFormat{
BackendAddressPool: &network.SubResource{
ID: to.StringPtr("[concat(variables('masterInternalLbID'), '/backendAddressPools/', variables('masterLbBackendPoolName'))]"),
},
BackendPort: to.Int32Ptr(4443),
EnableFloatingIP: to.BoolPtr(false),
FrontendIPConfiguration: &network.SubResource{
ID: to.StringPtr("[variables('masterInternalLbIPConfigID')]"),
},
FrontendPort: to.Int32Ptr(443),
IdleTimeoutInMinutes: to.Int32Ptr(5),
Protocol: network.TransportProtocolTCP,
Probe: &network.SubResource{
ID: to.StringPtr("[concat(variables('masterInternalLbID'),'/probes/tcpHTTPSProbe')]"),
},
},
},
},
Probes: &[]network.Probe{
{
Name: to.StringPtr("tcpHTTPSProbe"),
ProbePropertiesFormat: &network.ProbePropertiesFormat{
IntervalInSeconds: to.Int32Ptr(5),
NumberOfProbes: to.Int32Ptr(2),
Port: to.Int32Ptr(4443),
Protocol: network.ProbeProtocolTCP,
},
},
},
},
Sku: &network.LoadBalancerSku{
Name: network.LoadBalancerSkuName("[variables('loadBalancerSku')]"),
},
Type: to.StringPtr("Microsoft.Network/loadBalancers"),
}
if cs.Properties.OrchestratorProfile.KubernetesConfig.LoadBalancerSku == api.StandardLoadBalancerSku {
udpRule := network.LoadBalancingRule{
Name: to.StringPtr("LBRuleUDP"),
LoadBalancingRulePropertiesFormat: &network.LoadBalancingRulePropertiesFormat{
BackendAddressPool: &network.SubResource{
ID: to.StringPtr("[concat(variables('masterInternalLbID'), '/backendAddressPools/', variables('masterLbBackendPoolName'))]"),
},
BackendPort: to.Int32Ptr(1123),
EnableFloatingIP: to.BoolPtr(false),
FrontendIPConfiguration: &network.SubResource{
ID: to.StringPtr("[variables('masterInternalLbIPConfigID')]"),
},
FrontendPort: to.Int32Ptr(1123),
IdleTimeoutInMinutes: to.Int32Ptr(5),
Protocol: network.TransportProtocolUDP,
Probe: &network.SubResource{
ID: to.StringPtr("[concat(variables('masterInternalLbID'),'/probes/tcpHTTPSProbe')]"),
},
},
}
*loadBalancer.LoadBalancerPropertiesFormat.LoadBalancingRules = append(*loadBalancer.LoadBalancerPropertiesFormat.LoadBalancingRules, udpRule)
}
loadBalancerARM := LoadBalancerARM{
ARMResource: armResource,
LoadBalancer: loadBalancer,
}
return loadBalancerARM
}