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azure_provider.go
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azure_provider.go
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package provider
import (
"math/big"
"math/rand"
"net/netip"
"strconv"
"github.com/kyma-project/control-plane/components/kyma-environment-broker/internal/networking"
"github.com/kyma-project/control-plane/components/kyma-environment-broker/internal"
"github.com/kyma-project/control-plane/components/kyma-environment-broker/internal/broker"
"github.com/kyma-project/control-plane/components/kyma-environment-broker/internal/ptr"
"github.com/kyma-project/control-plane/components/provisioner/pkg/gqlschema"
)
const (
DefaultAzureRegion = "eastus"
DefaultEuAccessAzureRegion = "switzerlandnorth"
DefaultAzureMultiZoneCount = 3
)
var europeAzure = "westeurope"
var usAzure = "eastus"
var asiaAzure = "southeastasia"
var trialPurpose = "evaluation"
var toAzureSpecific = map[string]*string{
string(broker.Europe): &europeAzure,
string(broker.Us): &usAzure,
string(broker.Asia): &asiaAzure,
}
type (
AzureInput struct {
MultiZone bool
ControlPlaneFailureTolerance string
}
AzureLiteInput struct{}
AzureTrialInput struct {
PlatformRegionMapping map[string]string
}
AzureFreemiumInput struct{}
)
func (p *AzureInput) Defaults() *gqlschema.ClusterConfigInput {
zonesCount := 1
if p.MultiZone {
zonesCount = DefaultAzureMultiZoneCount
}
var controlPlaneFailureTolerance *string = nil
if p.ControlPlaneFailureTolerance != "" {
controlPlaneFailureTolerance = &p.ControlPlaneFailureTolerance
}
return &gqlschema.ClusterConfigInput{
GardenerConfig: &gqlschema.GardenerConfigInput{
DiskType: ptr.String("Standard_LRS"),
VolumeSizeGb: ptr.Integer(50),
MachineType: "Standard_D4_v3",
Region: DefaultAzureRegion,
Provider: "azure",
WorkerCidr: networking.DefaultNodesCIDR,
AutoScalerMin: 3,
AutoScalerMax: 20,
MaxSurge: zonesCount,
MaxUnavailable: 0,
ProviderSpecificConfig: &gqlschema.ProviderSpecificInput{
AzureConfig: &gqlschema.AzureProviderConfigInput{
VnetCidr: networking.DefaultNodesCIDR,
AzureZones: generateAzureZones(networking.DefaultNodesCIDR, generateRandomAzureZones(zonesCount)),
EnableNatGateway: ptr.Bool(true),
},
},
ControlPlaneFailureTolerance: controlPlaneFailureTolerance,
},
}
}
func (p *AzureInput) ApplyParameters(input *gqlschema.ClusterConfigInput, pp internal.ProvisioningParameters) {
if internal.IsEuAccess(pp.PlatformRegion) {
updateString(&input.GardenerConfig.Region, ptr.String(DefaultEuAccessAzureRegion))
return
}
workerCidr := networking.DefaultNodesCIDR
if pp.Parameters.Networking != nil {
workerCidr = pp.Parameters.Networking.NodesCidr
}
input.GardenerConfig.WorkerCidr = workerCidr
input.GardenerConfig.ProviderSpecificConfig.AzureConfig.VnetCidr = workerCidr
zonesCount := 1
if p.MultiZone {
zonesCount = DefaultAzureMultiZoneCount
}
// explicit zones list is provided
if len(pp.Parameters.Zones) > 0 {
var zones []int
for _, inputZone := range pp.Parameters.Zones {
zone, err := strconv.Atoi(inputZone)
if err != nil || zone < 1 || zone > 3 {
continue
}
zones = append(zones, zone)
}
input.GardenerConfig.ProviderSpecificConfig.AzureConfig.AzureZones = generateAzureZones(workerCidr, zones)
} else {
input.GardenerConfig.ProviderSpecificConfig.AzureConfig.AzureZones = generateAzureZones(workerCidr, generateRandomAzureZones(zonesCount))
}
}
func (p *AzureInput) Profile() gqlschema.KymaProfile {
return gqlschema.KymaProfileProduction
}
func (p *AzureInput) Provider() internal.CloudProvider {
return internal.Azure
}
func (p *AzureLiteInput) Defaults() *gqlschema.ClusterConfigInput {
return &gqlschema.ClusterConfigInput{
GardenerConfig: &gqlschema.GardenerConfigInput{
DiskType: ptr.String("Standard_LRS"),
VolumeSizeGb: ptr.Integer(50),
MachineType: "Standard_D4_v3",
Region: DefaultAzureRegion,
Provider: "azure",
WorkerCidr: networking.DefaultNodesCIDR,
AutoScalerMin: 2,
AutoScalerMax: 10,
MaxSurge: 1,
MaxUnavailable: 0,
ProviderSpecificConfig: &gqlschema.ProviderSpecificInput{
AzureConfig: &gqlschema.AzureProviderConfigInput{
VnetCidr: networking.DefaultNodesCIDR,
AzureZones: []*gqlschema.AzureZoneInput{
{
Name: generateRandomAzureZone(),
Cidr: networking.DefaultNodesCIDR,
},
},
EnableNatGateway: ptr.Bool(true),
},
},
},
}
}
func (p *AzureLiteInput) ApplyParameters(input *gqlschema.ClusterConfigInput, pp internal.ProvisioningParameters) {
if internal.IsEuAccess(pp.PlatformRegion) {
updateString(&input.GardenerConfig.Region, ptr.String(DefaultEuAccessAzureRegion))
}
updateAzureSingleNodeWorkerCidr(input, pp)
}
func updateAzureSingleNodeWorkerCidr(input *gqlschema.ClusterConfigInput, pp internal.ProvisioningParameters) {
workerCIDR := networking.DefaultNodesCIDR
if pp.Parameters.Networking != nil {
workerCIDR = pp.Parameters.Networking.NodesCidr
}
input.GardenerConfig.WorkerCidr = workerCIDR
input.GardenerConfig.ProviderSpecificConfig.AzureConfig.VnetCidr = workerCIDR
input.GardenerConfig.ProviderSpecificConfig.AzureConfig.AzureZones[0].Cidr = workerCIDR
}
func (p *AzureLiteInput) Profile() gqlschema.KymaProfile {
return gqlschema.KymaProfileEvaluation
}
func (p *AzureLiteInput) Provider() internal.CloudProvider {
return internal.Azure
}
func (p *AzureTrialInput) Defaults() *gqlschema.ClusterConfigInput {
return azureTrialDefaults()
}
func azureTrialDefaults() *gqlschema.ClusterConfigInput {
return &gqlschema.ClusterConfigInput{
GardenerConfig: &gqlschema.GardenerConfigInput{
DiskType: ptr.String("Standard_LRS"),
VolumeSizeGb: ptr.Integer(50),
MachineType: "Standard_D4_v3",
Region: DefaultAzureRegion,
Provider: "azure",
WorkerCidr: networking.DefaultNodesCIDR,
AutoScalerMin: 1,
AutoScalerMax: 1,
MaxSurge: 1,
MaxUnavailable: 0,
Purpose: &trialPurpose,
ProviderSpecificConfig: &gqlschema.ProviderSpecificInput{
AzureConfig: &gqlschema.AzureProviderConfigInput{
VnetCidr: networking.DefaultNodesCIDR,
AzureZones: []*gqlschema.AzureZoneInput{
{
Name: generateRandomAzureZone(),
Cidr: networking.DefaultNodesCIDR,
},
},
EnableNatGateway: ptr.Bool(false),
},
},
},
}
}
func (p *AzureTrialInput) ApplyParameters(input *gqlschema.ClusterConfigInput, pp internal.ProvisioningParameters) {
params := pp.Parameters
if internal.IsEuAccess(pp.PlatformRegion) {
updateString(&input.GardenerConfig.Region, ptr.String(DefaultEuAccessAzureRegion))
return
}
// read platform region if exists
if pp.PlatformRegion != "" {
abstractRegion, found := p.PlatformRegionMapping[pp.PlatformRegion]
if found {
r := toAzureSpecific[abstractRegion]
updateString(&input.GardenerConfig.Region, r)
}
}
if params.Region != nil && *params.Region != "" {
updateString(&input.GardenerConfig.Region, toAzureSpecific[*params.Region])
}
updateAzureSingleNodeWorkerCidr(input, pp)
}
func (p *AzureTrialInput) Provider() internal.CloudProvider {
return internal.Azure
}
func (p *AzureTrialInput) Profile() gqlschema.KymaProfile {
return gqlschema.KymaProfileEvaluation
}
func (p *AzureFreemiumInput) Defaults() *gqlschema.ClusterConfigInput {
return azureTrialDefaults()
}
func (p *AzureFreemiumInput) ApplyParameters(input *gqlschema.ClusterConfigInput, params internal.ProvisioningParameters) {
updateSlice(&input.GardenerConfig.ProviderSpecificConfig.AzureConfig.Zones, params.Parameters.Zones)
}
func (p *AzureFreemiumInput) Profile() gqlschema.KymaProfile {
return gqlschema.KymaProfileEvaluation
}
func (p *AzureFreemiumInput) Provider() internal.CloudProvider {
return internal.Azure
}
func generateRandomAzureZone() int {
const (
min = 1
max = 3
)
// generates random number from 1-3 range
getRandomNumber := func() int {
return rand.Intn(max-min+1) + min
}
return getRandomNumber()
}
func generateRandomAzureZones(zonesCount int) []int {
zones := []int{1, 2, 3}
if zonesCount > 3 {
zonesCount = 3
}
rand.Shuffle(len(zones), func(i, j int) { zones[i], zones[j] = zones[j], zones[i] })
return zones[:zonesCount]
}
func generateAzureZones(workerCidr string, zoneNames []int) []*gqlschema.AzureZoneInput {
var zones []*gqlschema.AzureZoneInput
cidr, _ := netip.ParsePrefix(workerCidr)
workerPrefixLength := cidr.Bits() + 3
workerPrefix, _ := cidr.Addr().Prefix(workerPrefixLength)
// delta - it is the difference between CIDRs of two zones:
// zone1: "10.250.0.0/19",
// zone2: "10.250.32.0/19",
delta := big.NewInt(1)
delta.Lsh(delta, uint(32-workerPrefixLength))
// zoneIPValue - it is an integer, which is based on IP bytes
zoneIPValue := new(big.Int).SetBytes(workerPrefix.Addr().AsSlice())
for _, name := range zoneNames {
zoneWorkerIP, _ := netip.AddrFromSlice(zoneIPValue.Bytes())
zoneWorkerCidr := netip.PrefixFrom(zoneWorkerIP, workerPrefixLength)
zoneIPValue.Add(zoneIPValue, delta)
zones = append(zones, &gqlschema.AzureZoneInput{
Name: name,
Cidr: zoneWorkerCidr.String(),
})
}
return zones
}