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feat(load-balancer): Set IPMode to "Proxy" if load balancer is config…
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…ured to use proxy protocol (hetznercloud#727)

Fixes hetznercloud#727
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@simonhammes
simonhammes committed Sep 4, 2024
1 parent c99a161 commit 7939dc9
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Showing 2 changed files with 47 additions and 14 deletions.
37 changes: 34 additions & 3 deletions hcloud/load_balancers.go
View file
Original file line number Diff line number Diff line change
Expand Up @@ -33,6 +33,7 @@ type loadBalancers struct {
lbOps LoadBalancerOps
disablePrivateIngressDefault bool
disableIPv6Default bool
useProxyProtocolDefault bool
}

func newLoadBalancers(lbOps LoadBalancerOps, disablePrivateIngressDefault bool, disableIPv6Default bool) *loadBalancers {
Expand Down Expand Up @@ -220,21 +221,37 @@ func (l *loadBalancers) buildLoadBalancerStatusIngress(lb *hcloud.LoadBalancer,
metrics.OperationCalled.WithLabelValues(op).Inc()

var ingress []corev1.LoadBalancerIngress
ipMode := corev1.LoadBalancerIPModeVIP

useProxyProtocol, err := l.getUseProxyProtocol(svc)
if err != nil {
return nil, fmt.Errorf("%s: %w", op, err)
}

if useProxyProtocol {
ipMode = corev1.LoadBalancerIPModeProxy
}

disablePubNet, err := annotation.LBDisablePublicNetwork.BoolFromService(svc)
if err != nil && !errors.Is(err, annotation.ErrNotSet) {
return nil, fmt.Errorf("%s: %w", op, err)
}

if !disablePubNet {
ingress = append(ingress, corev1.LoadBalancerIngress{IP: lb.PublicNet.IPv4.IP.String()})
ingress = append(ingress, corev1.LoadBalancerIngress{
IP: lb.PublicNet.IPv4.IP.String(),
IPMode: &ipMode,
})

disableIPV6, err := l.getDisableIPv6(svc)
if err != nil {
return nil, fmt.Errorf("%s: %w", op, err)
}
if !disableIPV6 {
ingress = append(ingress, corev1.LoadBalancerIngress{IP: lb.PublicNet.IPv6.IP.String()})
ingress = append(ingress, corev1.LoadBalancerIngress{
IP: lb.PublicNet.IPv6.IP.String(),
IPMode: &ipMode,
})
}
}

Expand All @@ -245,7 +262,10 @@ func (l *loadBalancers) buildLoadBalancerStatusIngress(lb *hcloud.LoadBalancer,

if !disablePrivIngress {
for _, privateNet := range lb.PrivateNet {
ingress = append(ingress, corev1.LoadBalancerIngress{IP: privateNet.IP.String()})
ingress = append(ingress, corev1.LoadBalancerIngress{
IP: privateNet.IP.String(),
IPMode: &ipMode,
})
}
}

Expand All @@ -263,6 +283,17 @@ func (l *loadBalancers) getDisablePrivateIngress(svc *corev1.Service) (bool, err
return false, err
}

func (l *loadBalancers) getUseProxyProtocol(svc *corev1.Service) (bool, error) {
disable, err := annotation.LBSvcProxyProtocol.BoolFromService(svc)
if err == nil {
return disable, nil
}
if errors.Is(err, annotation.ErrNotSet) {
return l.useProxyProtocolDefault, nil
}
return false, err
}

func (l *loadBalancers) getDisableIPv6(svc *corev1.Service) (bool, error) {
disable, err := annotation.LBIPv6Disabled.BoolFromService(svc)
if err == nil {
Expand Down
24 changes: 13 additions & 11 deletions hcloud/load_balancers_test.go
View file
Original file line number Diff line number Diff line change
Expand Up @@ -241,6 +241,8 @@ func TestLoadBalancers_EnsureLoadBalancer_CreateLoadBalancer(t *testing.T) {
Return(false, nil)
}

ipModeVIP := corev1.LoadBalancerIPModeVIP

tests := []LoadBalancerTestCase{
{
Name: "check for existing Load Balancer fails",
Expand Down Expand Up @@ -278,7 +280,7 @@ func TestLoadBalancers_EnsureLoadBalancer_CreateLoadBalancer(t *testing.T) {
Perform: func(t *testing.T, tt *LoadBalancerTestCase) {
expected := &corev1.LoadBalancerStatus{
Ingress: []corev1.LoadBalancerIngress{
{IP: tt.LB.PublicNet.IPv4.IP.String()},
{IP: tt.LB.PublicNet.IPv4.IP.String(), IPMode: &ipModeVIP},
},
}
lbStat, err := tt.LoadBalancers.EnsureLoadBalancer(tt.Ctx, tt.ClusterName, tt.Service, tt.Nodes)
Expand Down Expand Up @@ -309,8 +311,8 @@ func TestLoadBalancers_EnsureLoadBalancer_CreateLoadBalancer(t *testing.T) {
Perform: func(t *testing.T, tt *LoadBalancerTestCase) {
expected := &corev1.LoadBalancerStatus{
Ingress: []corev1.LoadBalancerIngress{
{IP: tt.LB.PublicNet.IPv4.IP.String()},
{IP: tt.LB.PublicNet.IPv6.IP.String()},
{IP: tt.LB.PublicNet.IPv4.IP.String(), IPMode: &ipModeVIP},
{IP: tt.LB.PublicNet.IPv6.IP.String(), IPMode: &ipModeVIP},
},
}
lbStat, err := tt.LoadBalancers.EnsureLoadBalancer(tt.Ctx, tt.ClusterName, tt.Service, tt.Nodes)
Expand Down Expand Up @@ -351,9 +353,9 @@ func TestLoadBalancers_EnsureLoadBalancer_CreateLoadBalancer(t *testing.T) {
Perform: func(t *testing.T, tt *LoadBalancerTestCase) {
expected := &corev1.LoadBalancerStatus{
Ingress: []corev1.LoadBalancerIngress{
{IP: tt.LB.PublicNet.IPv4.IP.String()},
{IP: tt.LB.PublicNet.IPv6.IP.String()},
{IP: tt.LB.PrivateNet[0].IP.String()},
{IP: tt.LB.PublicNet.IPv4.IP.String(), IPMode: &ipModeVIP},
{IP: tt.LB.PublicNet.IPv6.IP.String(), IPMode: &ipModeVIP},
{IP: tt.LB.PrivateNet[0].IP.String(), IPMode: &ipModeVIP},
},
}
lbStat, err := tt.LoadBalancers.EnsureLoadBalancer(tt.Ctx, tt.ClusterName, tt.Service, tt.Nodes)
Expand Down Expand Up @@ -395,8 +397,8 @@ func TestLoadBalancers_EnsureLoadBalancer_CreateLoadBalancer(t *testing.T) {
Perform: func(t *testing.T, tt *LoadBalancerTestCase) {
expected := &corev1.LoadBalancerStatus{
Ingress: []corev1.LoadBalancerIngress{
{IP: tt.LB.PublicNet.IPv4.IP.String()},
{IP: tt.LB.PublicNet.IPv6.IP.String()},
{IP: tt.LB.PublicNet.IPv4.IP.String(), IPMode: &ipModeVIP},
{IP: tt.LB.PublicNet.IPv6.IP.String(), IPMode: &ipModeVIP},
},
}
lbStat, err := tt.LoadBalancers.EnsureLoadBalancer(tt.Ctx, tt.ClusterName, tt.Service, tt.Nodes)
Expand Down Expand Up @@ -438,8 +440,8 @@ func TestLoadBalancers_EnsureLoadBalancer_CreateLoadBalancer(t *testing.T) {
Perform: func(t *testing.T, tt *LoadBalancerTestCase) {
expected := &corev1.LoadBalancerStatus{
Ingress: []corev1.LoadBalancerIngress{
{IP: tt.LB.PublicNet.IPv4.IP.String()},
{IP: tt.LB.PublicNet.IPv6.IP.String()},
{IP: tt.LB.PublicNet.IPv4.IP.String(), IPMode: &ipModeVIP},
{IP: tt.LB.PublicNet.IPv6.IP.String(), IPMode: &ipModeVIP},
},
}
lbStat, err := tt.LoadBalancers.EnsureLoadBalancer(tt.Ctx, tt.ClusterName, tt.Service, tt.Nodes)
Expand Down Expand Up @@ -493,7 +495,7 @@ func TestLoadBalancers_EnsureLoadBalancer_CreateLoadBalancer(t *testing.T) {
Perform: func(t *testing.T, tt *LoadBalancerTestCase) {
expected := &corev1.LoadBalancerStatus{
Ingress: []corev1.LoadBalancerIngress{
{IP: tt.LB.PrivateNet[0].IP.String()},
{IP: tt.LB.PrivateNet[0].IP.String(), IPMode: &ipModeVIP},
},
}
lbStat, err := tt.LoadBalancers.EnsureLoadBalancer(tt.Ctx, tt.ClusterName, tt.Service, tt.Nodes)
Expand Down

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