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Native Kubernetes service load-balancing

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98
docs/content/reference/dynamic-configuration/kubernetes-crd-definition-v1.yml
View file

@ -104,6 +104,13 @@ spec:
description: Namespace defines the namespace of the referenced
Kubernetes Service or TraefikService.
type: string
nativeLB:
description: NativeLB controls, when creating the load-balancer,
whether the LB's children are directly the pods IPs
or if the only child is the Kubernetes Service clusterIP.
The Kubernetes Service itself does load-balance to the
pods. By default, NativeLB is false.
type: boolean
passHostHeader:
description: PassHostHeader defines whether the client
Host header is forwarded to the upstream Kubernetes
@ -357,6 +364,13 @@ spec:
description: Namespace defines the namespace of the referenced
Kubernetes Service.
type: string
nativeLB:
description: NativeLB controls, when creating the load-balancer,
whether the LB's children are directly the pods IPs
or if the only child is the Kubernetes Service clusterIP.
The Kubernetes Service itself does load-balance to the
pods. By default, NativeLB is false.
type: boolean
port:
anyOf:
- type: integer
@ -542,6 +556,13 @@ spec:
description: Namespace defines the namespace of the referenced
Kubernetes Service.
type: string
nativeLB:
description: NativeLB controls, when creating the load-balancer,
whether the LB's children are directly the pods IPs
or if the only child is the Kubernetes Service clusterIP.
The Kubernetes Service itself does load-balance to the
pods. By default, NativeLB is false.
type: boolean
port:
anyOf:
- type: integer
@ -827,6 +848,13 @@ spec:
description: Namespace defines the namespace of the referenced
Kubernetes Service or TraefikService.
type: string
nativeLB:
description: NativeLB controls, when creating the load-balancer,
whether the LB's children are directly the pods IPs or if
the only child is the Kubernetes Service clusterIP. The
Kubernetes Service itself does load-balance to the pods.
By default, NativeLB is false.
type: boolean
passHostHeader:
description: PassHostHeader defines whether the client Host
header is forwarded to the upstream Kubernetes Service.
@ -1981,6 +2009,13 @@ spec:
description: Namespace defines the namespace of the referenced
Kubernetes Service or TraefikService.
type: string
nativeLB:
description: NativeLB controls, when creating the load-balancer,
whether the LB's children are directly the pods IPs or
if the only child is the Kubernetes Service clusterIP.
The Kubernetes Service itself does load-balance to the
pods. By default, NativeLB is false.
type: boolean
passHostHeader:
description: PassHostHeader defines whether the client Host
header is forwarded to the upstream Kubernetes Service.
@ -2072,6 +2107,13 @@ spec:
description: Namespace defines the namespace of the referenced
Kubernetes Service or TraefikService.
type: string
nativeLB:
description: NativeLB controls, when creating the load-balancer,
whether the LB's children are directly the pods IPs or if the
only child is the Kubernetes Service clusterIP. The Kubernetes
Service itself does load-balance to the pods. By default, NativeLB
is false.
type: boolean
passHostHeader:
description: PassHostHeader defines whether the client Host header
is forwarded to the upstream Kubernetes Service. By default,
@ -2169,6 +2211,13 @@ spec:
description: Namespace defines the namespace of the referenced
Kubernetes Service or TraefikService.
type: string
nativeLB:
description: NativeLB controls, when creating the load-balancer,
whether the LB's children are directly the pods IPs or
if the only child is the Kubernetes Service clusterIP.
The Kubernetes Service itself does load-balance to the
pods. By default, NativeLB is false.
type: boolean
passHostHeader:
description: PassHostHeader defines whether the client Host
header is forwarded to the upstream Kubernetes Service.
@ -2391,6 +2440,13 @@ spec:
description: Namespace defines the namespace of the referenced
Kubernetes Service or TraefikService.
type: string
nativeLB:
description: NativeLB controls, when creating the load-balancer,
whether the LB's children are directly the pods IPs
or if the only child is the Kubernetes Service clusterIP.
The Kubernetes Service itself does load-balance to the
pods. By default, NativeLB is false.
type: boolean
passHostHeader:
description: PassHostHeader defines whether the client
Host header is forwarded to the upstream Kubernetes
@ -2644,6 +2700,13 @@ spec:
description: Namespace defines the namespace of the referenced
Kubernetes Service.
type: string
nativeLB:
description: NativeLB controls, when creating the load-balancer,
whether the LB's children are directly the pods IPs
or if the only child is the Kubernetes Service clusterIP.
The Kubernetes Service itself does load-balance to the
pods. By default, NativeLB is false.
type: boolean
port:
anyOf:
- type: integer
@ -2829,6 +2892,13 @@ spec:
description: Namespace defines the namespace of the referenced
Kubernetes Service.
type: string
nativeLB:
description: NativeLB controls, when creating the load-balancer,
whether the LB's children are directly the pods IPs
or if the only child is the Kubernetes Service clusterIP.
The Kubernetes Service itself does load-balance to the
pods. By default, NativeLB is false.
type: boolean
port:
anyOf:
- type: integer
@ -3114,6 +3184,13 @@ spec:
description: Namespace defines the namespace of the referenced
Kubernetes Service or TraefikService.
type: string
nativeLB:
description: NativeLB controls, when creating the load-balancer,
whether the LB's children are directly the pods IPs or if
the only child is the Kubernetes Service clusterIP. The
Kubernetes Service itself does load-balance to the pods.
By default, NativeLB is false.
type: boolean
passHostHeader:
description: PassHostHeader defines whether the client Host
header is forwarded to the upstream Kubernetes Service.
@ -4268,6 +4345,13 @@ spec:
description: Namespace defines the namespace of the referenced
Kubernetes Service or TraefikService.
type: string
nativeLB:
description: NativeLB controls, when creating the load-balancer,
whether the LB's children are directly the pods IPs or
if the only child is the Kubernetes Service clusterIP.
The Kubernetes Service itself does load-balance to the
pods. By default, NativeLB is false.
type: boolean
passHostHeader:
description: PassHostHeader defines whether the client Host
header is forwarded to the upstream Kubernetes Service.
@ -4359,6 +4443,13 @@ spec:
description: Namespace defines the namespace of the referenced
Kubernetes Service or TraefikService.
type: string
nativeLB:
description: NativeLB controls, when creating the load-balancer,
whether the LB's children are directly the pods IPs or if the
only child is the Kubernetes Service clusterIP. The Kubernetes
Service itself does load-balance to the pods. By default, NativeLB
is false.
type: boolean
passHostHeader:
description: PassHostHeader defines whether the client Host header
is forwarded to the upstream Kubernetes Service. By default,
@ -4456,6 +4547,13 @@ spec:
description: Namespace defines the namespace of the referenced
Kubernetes Service or TraefikService.
type: string
nativeLB:
description: NativeLB controls, when creating the load-balancer,
whether the LB's children are directly the pods IPs or
if the only child is the Kubernetes Service clusterIP.
The Kubernetes Service itself does load-balance to the
pods. By default, NativeLB is false.
type: boolean
passHostHeader:
description: PassHostHeader defines whether the client Host
header is forwarded to the upstream Kubernetes Service.

7
docs/content/reference/dynamic-configuration/traefik.containo.us_ingressroutes.yaml
View file

@ -104,6 +104,13 @@ spec:
description: Namespace defines the namespace of the referenced
Kubernetes Service or TraefikService.
type: string
nativeLB:
description: NativeLB controls, when creating the load-balancer,
whether the LB's children are directly the pods IPs
or if the only child is the Kubernetes Service clusterIP.
The Kubernetes Service itself does load-balance to the
pods. By default, NativeLB is false.
type: boolean
passHostHeader:
description: PassHostHeader defines whether the client
Host header is forwarded to the upstream Kubernetes

7
docs/content/reference/dynamic-configuration/traefik.containo.us_ingressroutetcps.yaml
View file

@ -89,6 +89,13 @@ spec:
description: Namespace defines the namespace of the referenced
Kubernetes Service.
type: string
nativeLB:
description: NativeLB controls, when creating the load-balancer,
whether the LB's children are directly the pods IPs
or if the only child is the Kubernetes Service clusterIP.
The Kubernetes Service itself does load-balance to the
pods. By default, NativeLB is false.
type: boolean
port:
anyOf:
- type: integer

7
docs/content/reference/dynamic-configuration/traefik.containo.us_ingressrouteudps.yaml
View file

@ -63,6 +63,13 @@ spec:
description: Namespace defines the namespace of the referenced
Kubernetes Service.
type: string
nativeLB:
description: NativeLB controls, when creating the load-balancer,
whether the LB's children are directly the pods IPs
or if the only child is the Kubernetes Service clusterIP.
The Kubernetes Service itself does load-balance to the
pods. By default, NativeLB is false.
type: boolean
port:
anyOf:
- type: integer

7
docs/content/reference/dynamic-configuration/traefik.containo.us_middlewares.yaml
View file

@ -250,6 +250,13 @@ spec:
description: Namespace defines the namespace of the referenced
Kubernetes Service or TraefikService.
type: string
nativeLB:
description: NativeLB controls, when creating the load-balancer,
whether the LB's children are directly the pods IPs or if
the only child is the Kubernetes Service clusterIP. The
Kubernetes Service itself does load-balance to the pods.
By default, NativeLB is false.
type: boolean
passHostHeader:
description: PassHostHeader defines whether the client Host
header is forwarded to the upstream Kubernetes Service.

21
docs/content/reference/dynamic-configuration/traefik.containo.us_traefikservices.yaml
View file

@ -75,6 +75,13 @@ spec:
description: Namespace defines the namespace of the referenced
Kubernetes Service or TraefikService.
type: string
nativeLB:
description: NativeLB controls, when creating the load-balancer,
whether the LB's children are directly the pods IPs or
if the only child is the Kubernetes Service clusterIP.
The Kubernetes Service itself does load-balance to the
pods. By default, NativeLB is false.
type: boolean
passHostHeader:
description: PassHostHeader defines whether the client Host
header is forwarded to the upstream Kubernetes Service.
@ -166,6 +173,13 @@ spec:
description: Namespace defines the namespace of the referenced
Kubernetes Service or TraefikService.
type: string
nativeLB:
description: NativeLB controls, when creating the load-balancer,
whether the LB's children are directly the pods IPs or if the
only child is the Kubernetes Service clusterIP. The Kubernetes
Service itself does load-balance to the pods. By default, NativeLB
is false.
type: boolean
passHostHeader:
description: PassHostHeader defines whether the client Host header
is forwarded to the upstream Kubernetes Service. By default,
@ -263,6 +277,13 @@ spec:
description: Namespace defines the namespace of the referenced
Kubernetes Service or TraefikService.
type: string
nativeLB:
description: NativeLB controls, when creating the load-balancer,
whether the LB's children are directly the pods IPs or
if the only child is the Kubernetes Service clusterIP.
The Kubernetes Service itself does load-balance to the
pods. By default, NativeLB is false.
type: boolean
passHostHeader:
description: PassHostHeader defines whether the client Host
header is forwarded to the upstream Kubernetes Service.

7
docs/content/reference/dynamic-configuration/traefik.io_ingressroutes.yaml
View file

@ -104,6 +104,13 @@ spec:
description: Namespace defines the namespace of the referenced
Kubernetes Service or TraefikService.
type: string
nativeLB:
description: NativeLB controls, when creating the load-balancer,
whether the LB's children are directly the pods IPs
or if the only child is the Kubernetes Service clusterIP.
The Kubernetes Service itself does load-balance to the
pods. By default, NativeLB is false.
type: boolean
passHostHeader:
description: PassHostHeader defines whether the client
Host header is forwarded to the upstream Kubernetes

7
docs/content/reference/dynamic-configuration/traefik.io_ingressroutetcps.yaml
View file

@ -89,6 +89,13 @@ spec:
description: Namespace defines the namespace of the referenced
Kubernetes Service.
type: string
nativeLB:
description: NativeLB controls, when creating the load-balancer,
whether the LB's children are directly the pods IPs
or if the only child is the Kubernetes Service clusterIP.
The Kubernetes Service itself does load-balance to the
pods. By default, NativeLB is false.
type: boolean
port:
anyOf:
- type: integer

7
docs/content/reference/dynamic-configuration/traefik.io_ingressrouteudps.yaml
View file

@ -63,6 +63,13 @@ spec:
description: Namespace defines the namespace of the referenced
Kubernetes Service.
type: string
nativeLB:
description: NativeLB controls, when creating the load-balancer,
whether the LB's children are directly the pods IPs
or if the only child is the Kubernetes Service clusterIP.
The Kubernetes Service itself does load-balance to the
pods. By default, NativeLB is false.
type: boolean
port:
anyOf:
- type: integer

7
docs/content/reference/dynamic-configuration/traefik.io_middlewares.yaml
View file

@ -250,6 +250,13 @@ spec:
description: Namespace defines the namespace of the referenced
Kubernetes Service or TraefikService.
type: string
nativeLB:
description: NativeLB controls, when creating the load-balancer,
whether the LB's children are directly the pods IPs or if
the only child is the Kubernetes Service clusterIP. The
Kubernetes Service itself does load-balance to the pods.
By default, NativeLB is false.
type: boolean
passHostHeader:
description: PassHostHeader defines whether the client Host
header is forwarded to the upstream Kubernetes Service.

21
docs/content/reference/dynamic-configuration/traefik.io_traefikservices.yaml
View file

@ -75,6 +75,13 @@ spec:
description: Namespace defines the namespace of the referenced
Kubernetes Service or TraefikService.
type: string
nativeLB:
description: NativeLB controls, when creating the load-balancer,
whether the LB's children are directly the pods IPs or
if the only child is the Kubernetes Service clusterIP.
The Kubernetes Service itself does load-balance to the
pods. By default, NativeLB is false.
type: boolean
passHostHeader:
description: PassHostHeader defines whether the client Host
header is forwarded to the upstream Kubernetes Service.
@ -166,6 +173,13 @@ spec:
description: Namespace defines the namespace of the referenced
Kubernetes Service or TraefikService.
type: string
nativeLB:
description: NativeLB controls, when creating the load-balancer,
whether the LB's children are directly the pods IPs or if the
only child is the Kubernetes Service clusterIP. The Kubernetes
Service itself does load-balance to the pods. By default, NativeLB
is false.
type: boolean
passHostHeader:
description: PassHostHeader defines whether the client Host header
is forwarded to the upstream Kubernetes Service. By default,
@ -263,6 +277,13 @@ spec:
description: Namespace defines the namespace of the referenced
Kubernetes Service or TraefikService.
type: string
nativeLB:
description: NativeLB controls, when creating the load-balancer,
whether the LB's children are directly the pods IPs or
if the only child is the Kubernetes Service clusterIP.
The Kubernetes Service itself does load-balance to the
pods. By default, NativeLB is false.
type: boolean
passHostHeader:
description: PassHostHeader defines whether the client Host
header is forwarded to the upstream Kubernetes Service.

212
docs/content/routing/providers/kubernetes-crd.md
View file

@ -349,15 +349,16 @@ Register the `IngressRoute` [kind](../../reference/dynamic-configuration/kuberne
sameSite: none
strategy: RoundRobin
weight: 10
tls: # [11]
secretName: supersecret # [12]
options: # [13]
name: opt # [14]
namespace: default # [15]
certResolver: foo # [16]
domains: # [17]
- main: example.net # [18]
sans: # [19]
nativeLB: true # [11]
tls: # [12]
secretName: supersecret # [13]
options: # [14]
name: opt # [15]
namespace: default # [16]
certResolver: foo # [17]
domains: # [18]
- main: example.net # [19]
sans: # [20]
- a.example.net
- b.example.net
```
@ -374,15 +375,16 @@ Register the `IngressRoute` [kind](../../reference/dynamic-configuration/kuberne
| [8] | `routes[n].services` | List of any combination of [TraefikService](#kind-traefikservice) and reference to a [Kubernetes service](https://kubernetes.io/docs/concepts/services-networking/service/) (See below for `ExternalName Service` setup) |
| [9] | `services[n].port` | Defines the port of a [Kubernetes service](https://kubernetes.io/docs/concepts/services-networking/service/). This can be a reference to a named port. |
| [10] | `services[n].serversTransport` | Defines the reference to a [ServersTransport](#kind-serverstransport). The ServersTransport namespace is assumed to be the [Kubernetes service](https://kubernetes.io/docs/concepts/services-networking/service/) namespace (see [ServersTransport reference](#serverstransport-reference)). |
| [11] | `tls` | Defines [TLS](../routers/index.md#tls) certificate configuration |
| [12] | `tls.secretName` | Defines the [secret](https://kubernetes.io/docs/concepts/configuration/secret/) name used to store the certificate (in the `IngressRoute` namespace) |
| [13] | `tls.options` | Defines the reference to a [TLSOption](#kind-tlsoption) |
| [14] | `options.name` | Defines the [TLSOption](#kind-tlsoption) name |
| [15] | `options.namespace` | Defines the [TLSOption](#kind-tlsoption) namespace |
| [16] | `tls.certResolver` | Defines the reference to a [CertResolver](../routers/index.md#certresolver) |
| [17] | `tls.domains` | List of [domains](../routers/index.md#domains) |
| [18] | `domains[n].main` | Defines the main domain name |
| [19] | `domains[n].sans` | List of SANs (alternative domains) |
| [11] | `services[n].nativeLB` | Controls, when creating the load-balancer, whether the LB's children are directly the pods IPs or if the only child is the Kubernetes Service clusterIP. |
| [12] | `tls` | Defines [TLS](../routers/index.md#tls) certificate configuration |
| [13] | `tls.secretName` | Defines the [secret](https://kubernetes.io/docs/concepts/configuration/secret/) name used to store the certificate (in the `IngressRoute` namespace) |
| [14] | `tls.options` | Defines the reference to a [TLSOption](#kind-tlsoption) |
| [15] | `options.name` | Defines the [TLSOption](#kind-tlsoption) name |
| [16] | `options.namespace` | Defines the [TLSOption](#kind-tlsoption) namespace |
| [17] | `tls.certResolver` | Defines the reference to a [CertResolver](../routers/index.md#certresolver) |
| [18] | `tls.domains` | List of [domains](../routers/index.md#domains) |
| [19] | `domains[n].main` | Defines the main domain name |
| [20] | `domains[n].sans` | List of SANs (alternative domains) |
??? example "Declaring an IngressRoute"
@ -639,6 +641,47 @@ More information in the dedicated server [load balancing](../services/index.md#l
task: app2
```
!!! important "Kubernetes Service Native Load-Balancing"
To avoid creating the server load-balancer with the pods IPs and use Kubernetes Service clusterIP directly,
one should set the service `NativeLB` option to true.
Please note that, by default, Traefik reuses the established connections to the backends for performance purposes. This can prevent the requests load balancing between the replicas from behaving as one would expect when the option is set.
By default, `NativeLB` is false.
??? example "Example"
```yaml
---
apiVersion: traefik.containo.us/v1alpha1
kind: IngressRoute
metadata:
name: test.route
namespace: default
spec:
entryPoints:
- foo
routes:
- match: Host(`example.net`)
kind: Rule
services:
- name: svc
port: 80
# Here, nativeLB instructs to build the servers load balancer with the Kubernetes Service clusterIP only.
nativeLB: true
---
apiVersion: v1
kind: Service
metadata:
name: svc
namespace: default
spec:
type: ClusterIP
...
```
### Kind: `Middleware`
`Middleware` is the CRD implementation of a [Traefik middleware](../../middlewares/http/overview.md).
@ -1103,22 +1146,23 @@ Register the `IngressRouteTCP` [kind](../../reference/dynamic-configuration/kube
terminationDelay: 400 # [11]
proxyProtocol: # [12]
version: 1 # [13]
tls: # [14]
secretName: supersecret # [15]
options: # [16]
name: opt # [17]
namespace: default # [18]
certResolver: foo # [19]
domains: # [20]
- main: example.net # [21]
sans: # [22]
nativeLB: true # [14]
tls: # [15]
secretName: supersecret # [16]
options: # [17]
name: opt # [18]
namespace: default # [19]
certResolver: foo # [20]
domains: # [21]
- main: example.net # [22]
sans: # [23]
- a.example.net
- b.example.net
passthrough: false # [23]
passthrough: false # [24]
```
| Ref | Attribute | Purpose |
|------|--------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|------|-------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| [1] | `entryPoints` | List of [entrypoints](../routers/index.md#entrypoints_1) names |
| [2] | `routes` | List of routes |
| [3] | `routes[n].match` | Defines the [rule](../routers/index.md#rule_1) of the underlying router |
@ -1130,18 +1174,19 @@ Register the `IngressRouteTCP` [kind](../../reference/dynamic-configuration/kube
| [9] | `services[n].port` | Defines the port of a [Kubernetes service](https://kubernetes.io/docs/concepts/services-networking/service/). This can be a reference to a named port. |
| [10] | `services[n].weight` | Defines the weight to apply to the server load balancing |
| [11] | `services[n].terminationDelay` | corresponds to the deadline that the proxy sets, after one of its connected peers indicates it has closed the writing capability of its connection, to close the reading capability as well, hence fully terminating the connection. It is a duration in milliseconds, defaulting to 100. A negative value means an infinite deadline (i.e. the reading capability is never closed). |
| [12] | `proxyProtocol` | Defines the [PROXY protocol](../services/index.md#proxy-protocol) configuration |
| [13] | `version` | Defines the [PROXY protocol](../services/index.md#proxy-protocol) version |
| [14] | `tls` | Defines [TLS](../routers/index.md#tls_1) certificate configuration |
| [15] | `tls.secretName` | Defines the [secret](https://kubernetes.io/docs/concepts/configuration/secret/) name used to store the certificate (in the `IngressRoute` namespace) |
| [16] | `tls.options` | Defines the reference to a [TLSOption](#kind-tlsoption) |
| [17] | `options.name` | Defines the [TLSOption](#kind-tlsoption) name |
| [18] | `options.namespace` | Defines the [TLSOption](#kind-tlsoption) namespace |
| [19] | `tls.certResolver` | Defines the reference to a [CertResolver](../routers/index.md#certresolver_1) |
| [20] | `tls.domains` | List of [domains](../routers/index.md#domains_1) |
| [21] | `domains[n].main` | Defines the main domain name |
| [22] | `domains[n].sans` | List of SANs (alternative domains) |
| [23] | `tls.passthrough` | If `true`, delegates the TLS termination to the backend |
| [12] | `services[n].proxyProtocol` | Defines the [PROXY protocol](../services/index.md#proxy-protocol) configuration |
| [13] | `services[n].proxyProtocol.version` | Defines the [PROXY protocol](../services/index.md#proxy-protocol) version |
| [14] | `services[n].nativeLB` | Controls, when creating the load-balancer, whether the LB's children are directly the pods IPs or if the only child is the Kubernetes Service clusterIP. |
| [15] | `tls` | Defines [TLS](../routers/index.md#tls_1) certificate configuration |
| [16] | `tls.secretName` | Defines the [secret](https://kubernetes.io/docs/concepts/configuration/secret/) name used to store the certificate (in the `IngressRoute` namespace) |
| [17] | `tls.options` | Defines the reference to a [TLSOption](#kind-tlsoption) |
| [18] | `options.name` | Defines the [TLSOption](#kind-tlsoption) name |
| [19] | `options.namespace` | Defines the [TLSOption](#kind-tlsoption) namespace |
| [20] | `tls.certResolver` | Defines the reference to a [CertResolver](../routers/index.md#certresolver_1) |
| [21] | `tls.domains` | List of [domains](../routers/index.md#domains_1) |
| [22] | `domains[n].main` | Defines the main domain name |
| [23] | `domains[n].sans` | List of SANs (alternative domains) |
| [24] | `tls.passthrough` | If `true`, delegates the TLS termination to the backend |
??? example "Declaring an IngressRouteTCP"
@ -1275,6 +1320,45 @@ Register the `IngressRouteTCP` [kind](../../reference/dynamic-configuration/kube
- port: 80
```
!!! important "Kubernetes Service Native Load-Balancing"
To avoid creating the server load-balancer with the pods IPs and use Kubernetes Service clusterIP directly,
one should set the TCP service `NativeLB` option to true.
By default, `NativeLB` is false.
??? example "Examples"
```yaml
---
apiVersion: traefik.containo.us/v1alpha1
kind: IngressRouteTCP
metadata:
name: test.route
namespace: default
spec:
entryPoints:
- foo
routes:
- match: HostSNI(`*`)
services:
- name: svc
port: 80
# Here, nativeLB instructs to build the servers load balancer with the Kubernetes Service clusterIP only.
nativeLB: true
---
apiVersion: v1
kind: Service
metadata:
name: svc
namespace: default
spec:
type: ClusterIP
...
```
### Kind: `MiddlewareTCP`
`MiddlewareTCP` is the CRD implementation of a [Traefik TCP middleware](../../middlewares/tcp/overview.md).
@ -1348,16 +1432,18 @@ Register the `IngressRouteUDP` [kind](../../reference/dynamic-configuration/kube
- name: foo # [4]
port: 8080 # [5]
weight: 10 # [6]
nativeLB: true # [7]
```
| Ref | Attribute | Purpose |
|------|--------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|-----|-------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------|
| [1] | `entryPoints` | List of [entrypoints](../routers/index.md#entrypoints_1) names |
| [2] | `routes` | List of routes |
| [3] | `routes[n].services` | List of [Kubernetes service](https://kubernetes.io/docs/concepts/services-networking/service/) definitions (See below for `ExternalName Service` setup) |
| [4] | `services[n].name` | Defines the name of a [Kubernetes service](https://kubernetes.io/docs/concepts/services-networking/service/) |
| [6] | `services[n].port` | Defines the port of a [Kubernetes service](https://kubernetes.io/docs/concepts/services-networking/service/). This can be a reference to a named port. |
| [7] | `services[n].weight` | Defines the weight to apply to the server load balancing |
| [5] | `services[n].port` | Defines the port of a [Kubernetes service](https://kubernetes.io/docs/concepts/services-networking/service/). This can be a reference to a named port. |
| [6] | `services[n].weight` | Defines the weight to apply to the server load balancing |
| [7] | `services[n].nativeLB` | Controls, when creating the load-balancer, whether the LB's children are directly the pods IPs or if the only child is the Kubernetes Service clusterIP. |
??? example "Declaring an IngressRouteUDP"
@ -1479,6 +1565,44 @@ Register the `IngressRouteUDP` [kind](../../reference/dynamic-configuration/kube
- port: 80
```
!!! important "Kubernetes Service Native Load-Balancing"
To avoid creating the server load-balancer with the pods IPs and use Kubernetes Service clusterIP directly,
one should set the UDP service `NativeLB` option to true.
By default, `NativeLB` is false.
??? example "Example"
```yaml
---
apiVersion: traefik.containo.us/v1alpha1
kind: IngressRouteUDP
metadata:
name: test.route
namespace: default
spec:
entryPoints:
- foo
routes:
- services:
- name: svc
port: 80
# Here, nativeLB instructs to build the servers load balancer with the Kubernetes Service clusterIP only.
nativeLB: true
---
apiVersion: v1
kind: Service
metadata:
name: svc
namespace: default
spec:
type: ClusterIP
...
```
### Kind: `TLSOption`
`TLSOption` is the CRD implementation of a [Traefik "TLS Option"](../../https/tls.md#tls-options).

21
docs/content/routing/providers/kubernetes-ingress.md
View file

@ -299,6 +299,17 @@ which in turn will create the resulting routers, services, handlers, etc.
#### On Service
??? info "`traefik.ingress.kubernetes.io/service.nativelb`"
Controls, when creating the load-balancer, whether the LB's children are directly the pods IPs or if the only child is the Kubernetes Service clusterIP.
The Kubernetes Service itself does load-balance to the pods.
Please note that, by default, Traefik reuses the established connections to the backends for performance purposes. This can prevent the requests load balancing between the replicas from behaving as one would expect when the option is set.
By default, NativeLB is false.
```yaml
traefik.ingress.kubernetes.io/service.nativelb: "true"
```
??? info "`traefik.ingress.kubernetes.io/service.serversscheme`"
Overrides the default scheme.
@ -888,11 +899,15 @@ TLS certificates can be managed in Secrets objects.
### Communication Between Traefik and Pods
!!! info "It is not possible to route requests directly to [Kubernetes services](https://kubernetes.io/docs/concepts/services-networking/service/ "Link to Kubernetes service docs")"
!!! info "Routing directly to [Kubernetes services](https://kubernetes.io/docs/concepts/services-networking/service/ "Link to Kubernetes service docs")"
You can use an `ExternalName` service to forward requests to the Kubernetes service through DNS.
To route directly to the Kubernetes service,
one can use the `traefik.ingress.kubernetes.io/service.nativelb` annotation on the Kubernetes service.
It controls, when creating the load-balancer,
whether the LB's children are directly the pods IPs or if the only child is the Kubernetes Service clusterIP.
For doing so, you have to [allow external name services](https://doc.traefik.io/traefik/providers/kubernetes-ingress/#allowexternalnameservices "Link to docs about allowing external name services").
One alternative is to use an `ExternalName` service to forward requests to the Kubernetes service through DNS.
To do so, one must [allow external name services](https://doc.traefik.io/traefik/providers/kubernetes-ingress/#allowexternalnameservices "Link to docs about allowing external name services").
Traefik automatically requests endpoint information based on the service provided in the ingress spec.
Although Traefik will connect directly to the endpoints (pods),

98
integration/fixtures/k8s/01-traefik-crd.yml
View file

@ -104,6 +104,13 @@ spec:
description: Namespace defines the namespace of the referenced
Kubernetes Service or TraefikService.
type: string
nativeLB:
description: NativeLB controls, when creating the load-balancer,
whether the LB's children are directly the pods IPs
or if the only child is the Kubernetes Service clusterIP.
The Kubernetes Service itself does load-balance to the
pods. By default, NativeLB is false.
type: boolean
passHostHeader:
description: PassHostHeader defines whether the client
Host header is forwarded to the upstream Kubernetes
@ -357,6 +364,13 @@ spec:
description: Namespace defines the namespace of the referenced
Kubernetes Service.
type: string
nativeLB:
description: NativeLB controls, when creating the load-balancer,
whether the LB's children are directly the pods IPs
or if the only child is the Kubernetes Service clusterIP.
The Kubernetes Service itself does load-balance to the
pods. By default, NativeLB is false.
type: boolean
port:
anyOf:
- type: integer
@ -542,6 +556,13 @@ spec:
description: Namespace defines the namespace of the referenced
Kubernetes Service.
type: string
nativeLB:
description: NativeLB controls, when creating the load-balancer,
whether the LB's children are directly the pods IPs
or if the only child is the Kubernetes Service clusterIP.
The Kubernetes Service itself does load-balance to the
pods. By default, NativeLB is false.
type: boolean
port:
anyOf:
- type: integer
@ -827,6 +848,13 @@ spec:
description: Namespace defines the namespace of the referenced
Kubernetes Service or TraefikService.
type: string
nativeLB:
description: NativeLB controls, when creating the load-balancer,
whether the LB's children are directly the pods IPs or if
the only child is the Kubernetes Service clusterIP. The
Kubernetes Service itself does load-balance to the pods.
By default, NativeLB is false.
type: boolean
passHostHeader:
description: PassHostHeader defines whether the client Host
header is forwarded to the upstream Kubernetes Service.
@ -1981,6 +2009,13 @@ spec:
description: Namespace defines the namespace of the referenced
Kubernetes Service or TraefikService.
type: string
nativeLB:
description: NativeLB controls, when creating the load-balancer,
whether the LB's children are directly the pods IPs or
if the only child is the Kubernetes Service clusterIP.
The Kubernetes Service itself does load-balance to the
pods. By default, NativeLB is false.
type: boolean
passHostHeader:
description: PassHostHeader defines whether the client Host
header is forwarded to the upstream Kubernetes Service.
@ -2072,6 +2107,13 @@ spec:
description: Namespace defines the namespace of the referenced
Kubernetes Service or TraefikService.
type: string
nativeLB:
description: NativeLB controls, when creating the load-balancer,
whether the LB's children are directly the pods IPs or if the
only child is the Kubernetes Service clusterIP. The Kubernetes
Service itself does load-balance to the pods. By default, NativeLB
is false.
type: boolean
passHostHeader:
description: PassHostHeader defines whether the client Host header
is forwarded to the upstream Kubernetes Service. By default,
@ -2169,6 +2211,13 @@ spec:
description: Namespace defines the namespace of the referenced
Kubernetes Service or TraefikService.
type: string
nativeLB:
description: NativeLB controls, when creating the load-balancer,
whether the LB's children are directly the pods IPs or
if the only child is the Kubernetes Service clusterIP.
The Kubernetes Service itself does load-balance to the
pods. By default, NativeLB is false.
type: boolean
passHostHeader:
description: PassHostHeader defines whether the client Host
header is forwarded to the upstream Kubernetes Service.
@ -2391,6 +2440,13 @@ spec:
description: Namespace defines the namespace of the referenced
Kubernetes Service or TraefikService.
type: string
nativeLB:
description: NativeLB controls, when creating the load-balancer,
whether the LB's children are directly the pods IPs
or if the only child is the Kubernetes Service clusterIP.
The Kubernetes Service itself does load-balance to the
pods. By default, NativeLB is false.
type: boolean
passHostHeader:
description: PassHostHeader defines whether the client
Host header is forwarded to the upstream Kubernetes
@ -2644,6 +2700,13 @@ spec:
description: Namespace defines the namespace of the referenced
Kubernetes Service.
type: string
nativeLB:
description: NativeLB controls, when creating the load-balancer,
whether the LB's children are directly the pods IPs
or if the only child is the Kubernetes Service clusterIP.
The Kubernetes Service itself does load-balance to the
pods. By default, NativeLB is false.
type: boolean
port:
anyOf:
- type: integer
@ -2829,6 +2892,13 @@ spec:
description: Namespace defines the namespace of the referenced
Kubernetes Service.
type: string
nativeLB:
description: NativeLB controls, when creating the load-balancer,
whether the LB's children are directly the pods IPs
or if the only child is the Kubernetes Service clusterIP.
The Kubernetes Service itself does load-balance to the
pods. By default, NativeLB is false.
type: boolean
port:
anyOf:
- type: integer
@ -3114,6 +3184,13 @@ spec:
description: Namespace defines the namespace of the referenced
Kubernetes Service or TraefikService.
type: string
nativeLB:
description: NativeLB controls, when creating the load-balancer,
whether the LB's children are directly the pods IPs or if
the only child is the Kubernetes Service clusterIP. The
Kubernetes Service itself does load-balance to the pods.
By default, NativeLB is false.
type: boolean
passHostHeader:
description: PassHostHeader defines whether the client Host
header is forwarded to the upstream Kubernetes Service.
@ -4268,6 +4345,13 @@ spec:
description: Namespace defines the namespace of the referenced
Kubernetes Service or TraefikService.
type: string
nativeLB:
description: NativeLB controls, when creating the load-balancer,
whether the LB's children are directly the pods IPs or
if the only child is the Kubernetes Service clusterIP.
The Kubernetes Service itself does load-balance to the
pods. By default, NativeLB is false.
type: boolean
passHostHeader:
description: PassHostHeader defines whether the client Host
header is forwarded to the upstream Kubernetes Service.
@ -4359,6 +4443,13 @@ spec:
description: Namespace defines the namespace of the referenced
Kubernetes Service or TraefikService.
type: string
nativeLB:
description: NativeLB controls, when creating the load-balancer,
whether the LB's children are directly the pods IPs or if the
only child is the Kubernetes Service clusterIP. The Kubernetes
Service itself does load-balance to the pods. By default, NativeLB
is false.
type: boolean
passHostHeader:
description: PassHostHeader defines whether the client Host header
is forwarded to the upstream Kubernetes Service. By default,
@ -4456,6 +4547,13 @@ spec:
description: Namespace defines the namespace of the referenced
Kubernetes Service or TraefikService.
type: string
nativeLB:
description: NativeLB controls, when creating the load-balancer,
whether the LB's children are directly the pods IPs or
if the only child is the Kubernetes Service clusterIP.
The Kubernetes Service itself does load-balance to the
pods. By default, NativeLB is false.
type: boolean
passHostHeader:
description: PassHostHeader defines whether the client Host
header is forwarded to the upstream Kubernetes Service.

14
pkg/provider/kubernetes/crd/fixtures/services.yml
View file

@ -252,3 +252,17 @@ apiVersion: v1
metadata:
name: whoami-without-endpoints-subsets
namespace: default
---
apiVersion: v1
kind: Service
metadata:
name: native-svc
namespace: default
spec:
ports:
- name: web
port: 80
type: ClusterIP
clusterIP: 10.10.0.1

14
pkg/provider/kubernetes/crd/fixtures/tcp/services.yml
View file

@ -261,3 +261,17 @@ apiVersion: v1
metadata:
name: whoamitcp-without-endpoints-subsets
namespace: default
---
apiVersion: v1
kind: Service
metadata:
name: native-svc
namespace: default
spec:
ports:
- name: myapp
port: 8000
type: ClusterIP
clusterIP: 10.10.0.1

16
pkg/provider/kubernetes/crd/fixtures/tcp/with_native_service_lb.yml Normal file
View file

@ -0,0 +1,16 @@
apiVersion: traefik.io/v1alpha1
kind: IngressRouteTCP
metadata:
name: test.route
namespace: default
spec:
entryPoints:
- foo
routes:
- match: HostSNI(`foo.com`)
services:
- name: native-svc
port: 8000
nativeLB: true

14
pkg/provider/kubernetes/crd/fixtures/udp/services.yml
View file

@ -220,3 +220,17 @@ apiVersion: v1
metadata:
name: whoamiudp-without-endpoints-subsets
namespace: default
---
apiVersion: v1
kind: Service
metadata:
name: native-svc
namespace: default
spec:
ports:
- name: myapp
port: 8000
type: ClusterIP
clusterIP: 10.10.0.1

15
pkg/provider/kubernetes/crd/fixtures/udp/with_native_service_lb.yml Normal file
View file

@ -0,0 +1,15 @@
apiVersion: traefik.io/v1alpha1
kind: IngressRouteUDP
metadata:
name: test.route
namespace: default
spec:
entryPoints:
- foo
routes:
- services:
- name: native-svc
port: 8000
nativeLB: true

17
pkg/provider/kubernetes/crd/fixtures/with_native_service_lb.yml Normal file
View file

@ -0,0 +1,17 @@
apiVersion: traefik.io/v1alpha1
kind: IngressRoute
metadata:
name: test.route
namespace: default
spec:
entryPoints:
- foo
routes:
- match: Host(`foo.com`)
kind: Rule
services:
- name: native-svc
port: 80
nativeLB: true

15
pkg/provider/kubernetes/crd/kubernetes.go
View file

@ -10,8 +10,10 @@ import (
"encoding/json"
"errors"
"fmt"
"net"
"os"
"sort"
"strconv"
"strings"
"time"
@ -395,6 +397,7 @@ func (p *Provider) loadConfigurationFromCRD(ctx context.Context, client Client)
return conf
}
// getServicePort always returns a valid port, an error otherwise.
func getServicePort(svc *corev1.Service, port intstr.IntOrString) (*corev1.ServicePort, error) {
if svc == nil {
return nil, errors.New("service is not defined")
@ -427,6 +430,18 @@ func getServicePort(svc *corev1.Service, port intstr.IntOrString) (*corev1.Servi
return &corev1.ServicePort{Port: port.IntVal}, nil
}
func getNativeServiceAddress(service corev1.Service, svcPort corev1.ServicePort) (string, error) {
if service.Spec.ClusterIP == "None" {
return "", fmt.Errorf("no clusterIP on headless service: %s/%s", service.Namespace, service.Name)
}
if service.Spec.ClusterIP == "" {
return "", fmt.Errorf("no clusterIP found for service: %s/%s", service.Namespace, service.Name)
}
return net.JoinHostPort(service.Spec.ClusterIP, strconv.Itoa(int(svcPort.Port))), nil
}
func createPluginMiddleware(k8sClient Client, ns string, plugins map[string]apiextensionv1.JSON) (map[string]dynamic.PluginConf, error) {
if plugins == nil {
return nil, nil

14
pkg/provider/kubernetes/crd/kubernetes_http.go
View file

@ -368,6 +368,20 @@ func (c configBuilder) loadServers(parentNamespace string, svc v1alpha1.LoadBala
return nil, err
}
if svc.NativeLB {
address, err := getNativeServiceAddress(*service, *svcPort)
if err != nil {
return nil, fmt.Errorf("getting native Kubernetes Service address: %w", err)
}
protocol, err := parseServiceProtocol(svc.Scheme, svcPort.Name, svcPort.Port)
if err != nil {
return nil, err
}
return []dynamic.Server{{URL: fmt.Sprintf("%s://%s", protocol, address)}}, nil
}
var servers []dynamic.Server
if service.Spec.Type == corev1.ServiceTypeExternalName {
if !c.allowExternalNameServices {

9
pkg/provider/kubernetes/crd/kubernetes_tcp.go
View file

@ -226,6 +226,15 @@ func (p *Provider) loadTCPServers(client Client, namespace string, svc v1alpha1.
return nil, err
}
if svc.NativeLB {
address, err := getNativeServiceAddress(*service, *svcPort)
if err != nil {
return nil, fmt.Errorf("getting native Kubernetes Service address: %w", err)
}
return []dynamic.TCPServer{{Address: address}}, nil
}
var servers []dynamic.TCPServer
if service.Spec.Type == corev1.ServiceTypeExternalName {
servers = append(servers, dynamic.TCPServer{

208
pkg/provider/kubernetes/crd/kubernetes_test.go
View file

@ -6242,6 +6242,214 @@ func TestExternalNameService(t *testing.T) {
}
}
func TestNativeLB(t *testing.T) {
testCases := []struct {
desc string
ingressClass string
paths []string
expected *dynamic.Configuration
}{
{
desc: "Empty",
expected: &dynamic.Configuration{
UDP: &dynamic.UDPConfiguration{
Routers: map[string]*dynamic.UDPRouter{},
Services: map[string]*dynamic.UDPService{},
},
TCP: &dynamic.TCPConfiguration{
Routers: map[string]*dynamic.TCPRouter{},
Middlewares: map[string]*dynamic.TCPMiddleware{},
Services: map[string]*dynamic.TCPService{},
},
HTTP: &dynamic.HTTPConfiguration{
ServersTransports: map[string]*dynamic.ServersTransport{},
Routers: map[string]*dynamic.Router{},
Middlewares: map[string]*dynamic.Middleware{},
Services: map[string]*dynamic.Service{},
},
TLS: &dynamic.TLSConfiguration{},
},
},
{
desc: "HTTP with native Service LB",
paths: []string{"services.yml", "with_native_service_lb.yml"},
expected: &dynamic.Configuration{
UDP: &dynamic.UDPConfiguration{
Routers: map[string]*dynamic.UDPRouter{},
Services: map[string]*dynamic.UDPService{},
},
TCP: &dynamic.TCPConfiguration{
Routers: map[string]*dynamic.TCPRouter{},
Middlewares: map[string]*dynamic.TCPMiddleware{},
Services: map[string]*dynamic.TCPService{},
},
HTTP: &dynamic.HTTPConfiguration{
ServersTransports: map[string]*dynamic.ServersTransport{},
Routers: map[string]*dynamic.Router{
"default-test-route-6f97418635c7e18853da": {
EntryPoints: []string{"foo"},
Service: "default-test-route-6f97418635c7e18853da",
Rule: "Host(`foo.com`)",
Priority: 0,
},
},
Middlewares: map[string]*dynamic.Middleware{},
Services: map[string]*dynamic.Service{
"default-test-route-6f97418635c7e18853da": {
LoadBalancer: &dynamic.ServersLoadBalancer{
Servers: []dynamic.Server{
{
URL: "http://10.10.0.1:80",
},
},
PassHostHeader: Bool(true),
},
},
},
},
TLS: &dynamic.TLSConfiguration{},
},
},
{
desc: "TCP with native Service LB",
paths: []string{"tcp/services.yml", "tcp/with_native_service_lb.yml"},
expected: &dynamic.Configuration{
UDP: &dynamic.UDPConfiguration{
Routers: map[string]*dynamic.UDPRouter{},
Services: map[string]*dynamic.UDPService{},
},
HTTP: &dynamic.HTTPConfiguration{
ServersTransports: map[string]*dynamic.ServersTransport{},
Routers: map[string]*dynamic.Router{},
Middlewares: map[string]*dynamic.Middleware{},
Services: map[string]*dynamic.Service{},
},
TCP: &dynamic.TCPConfiguration{
Routers: map[string]*dynamic.TCPRouter{
"default-test.route-fdd3e9338e47a45efefc": {
EntryPoints: []string{"foo"},
Service: "default-test.route-fdd3e9338e47a45efefc",
Rule: "HostSNI(`foo.com`)",
},
},
Middlewares: map[string]*dynamic.TCPMiddleware{},
Services: map[string]*dynamic.TCPService{
"default-test.route-fdd3e9338e47a45efefc": {
LoadBalancer: &dynamic.TCPServersLoadBalancer{
Servers: []dynamic.TCPServer{
{
Address: "10.10.0.1:8000",
Port: "",
},
},
},
},
},
},
TLS: &dynamic.TLSConfiguration{},
},
},
{
desc: "UDP with native Service LB",
paths: []string{"udp/services.yml", "udp/with_native_service_lb.yml"},
expected: &dynamic.Configuration{
UDP: &dynamic.UDPConfiguration{
Routers: map[string]*dynamic.UDPRouter{
"default-test.route-0": {
EntryPoints: []string{"foo"},
Service: "default-test.route-0",
},
},
Services: map[string]*dynamic.UDPService{
"default-test.route-0": {
LoadBalancer: &dynamic.UDPServersLoadBalancer{
Servers: []dynamic.UDPServer{
{
Address: "10.10.0.1:8000",
Port: "",
},
},
},
},
},
},
HTTP: &dynamic.HTTPConfiguration{
ServersTransports: map[string]*dynamic.ServersTransport{},
Routers: map[string]*dynamic.Router{},
Middlewares: map[string]*dynamic.Middleware{},
Services: map[string]*dynamic.Service{},
},
TCP: &dynamic.TCPConfiguration{
Routers: map[string]*dynamic.TCPRouter{},
Middlewares: map[string]*dynamic.TCPMiddleware{},
Services: map[string]*dynamic.TCPService{},
},
TLS: &dynamic.TLSConfiguration{},
},
},
}
for _, test := range testCases {
test := test
t.Run(test.desc, func(t *testing.T) {
t.Parallel()
var k8sObjects []runtime.Object
var crdObjects []runtime.Object
for _, path := range test.paths {
yamlContent, err := os.ReadFile(filepath.FromSlash("./fixtures/" + path))
if err != nil {
panic(err)
}
objects := k8s.MustParseYaml(yamlContent)
for _, obj := range objects {
switch o := obj.(type) {
case *corev1.Service, *corev1.Endpoints, *corev1.Secret:
k8sObjects = append(k8sObjects, o)
case *v1alpha1.IngressRoute:
crdObjects = append(crdObjects, o)
case *v1alpha1.IngressRouteTCP:
crdObjects = append(crdObjects, o)
case *v1alpha1.IngressRouteUDP:
crdObjects = append(crdObjects, o)
case *v1alpha1.Middleware:
crdObjects = append(crdObjects, o)
case *v1alpha1.TraefikService:
crdObjects = append(crdObjects, o)
case *v1alpha1.TLSOption:
crdObjects = append(crdObjects, o)
case *v1alpha1.TLSStore:
crdObjects = append(crdObjects, o)
default:
}
}
}
kubeClient := kubefake.NewSimpleClientset(k8sObjects...)
crdClient := crdfake.NewSimpleClientset(crdObjects...)
client := newClientImpl(kubeClient, crdClient)
stopCh := make(chan struct{})
eventCh, err := client.WatchAll([]string{"default", "cross-ns"}, stopCh)
require.NoError(t, err)
if k8sObjects != nil || crdObjects != nil {
// just wait for the first event
<-eventCh
}
p := Provider{}
conf := p.loadConfigurationFromCRD(context.Background(), client)
assert.Equal(t, test.expected, conf)
})
}
}
func TestCreateBasicAuthCredentials(t *testing.T) {
var k8sObjects []runtime.Object
var crdObjects []runtime.Object

9
pkg/provider/kubernetes/crd/kubernetes_udp.go
View file

@ -120,6 +120,15 @@ func (p *Provider) loadUDPServers(client Client, namespace string, svc v1alpha1.
return nil, err
}
if svc.NativeLB {
address, err := getNativeServiceAddress(*service, *svcPort)
if err != nil {
return nil, fmt.Errorf("getting native Kubernetes Service address: %w", err)
}
return []dynamic.UDPServer{{Address: address}}, nil
}
var servers []dynamic.UDPServer
if service.Spec.Type == corev1.ServiceTypeExternalName {
servers = append(servers, dynamic.UDPServer{

6
pkg/provider/kubernetes/crd/traefikcontainous/v1alpha1/ingressroute.go
View file

@ -115,10 +115,14 @@ type LoadBalancerSpec struct {
// It allows to configure the transport between Traefik and your servers.
// Can only be used on a Kubernetes Service.
ServersTransport string `json:"serversTransport,omitempty"`
// Weight defines the weight and should only be specified when Name references a TraefikService object
// (and to be precise, one that embeds a Weighted Round Robin).
Weight *int `json:"weight,omitempty"`
// NativeLB controls, when creating the load-balancer,
// whether the LB's children are directly the pods IPs or if the only child is the Kubernetes Service clusterIP.
// The Kubernetes Service itself does load-balance to the pods.
// By default, NativeLB is false.
NativeLB bool `json:"nativeLB,omitempty"`
}
// Service defines an upstream HTTP service to proxy traffic to.

5
pkg/provider/kubernetes/crd/traefikcontainous/v1alpha1/ingressroutetcp.go
View file

@ -78,6 +78,11 @@ type ServiceTCP struct {
// ProxyProtocol defines the PROXY protocol configuration.
// More info: https://doc.traefik.io/traefik/v2.9/routing/services/#proxy-protocol
ProxyProtocol *dynamic.ProxyProtocol `json:"proxyProtocol,omitempty"`
// NativeLB controls, when creating the load-balancer,
// whether the LB's children are directly the pods IPs or if the only child is the Kubernetes Service clusterIP.
// The Kubernetes Service itself does load-balance to the pods.
// By default, NativeLB is false.
NativeLB bool `json:"nativeLB,omitempty"`
}
// +genclient

5
pkg/provider/kubernetes/crd/traefikcontainous/v1alpha1/ingressrouteudp.go
View file

@ -33,6 +33,11 @@ type ServiceUDP struct {
Port intstr.IntOrString `json:"port"`
// Weight defines the weight used when balancing requests between multiple Kubernetes Service.
Weight *int `json:"weight,omitempty"`
// NativeLB controls, when creating the load-balancer,
// whether the LB's children are directly the pods IPs or if the only child is the Kubernetes Service clusterIP.
// The Kubernetes Service itself does load-balance to the pods.
// By default, NativeLB is false.
NativeLB bool `json:"nativeLB,omitempty"`
}
// +genclient

6
pkg/provider/kubernetes/crd/traefikio/v1alpha1/ingressroute.go
View file

@ -115,10 +115,14 @@ type LoadBalancerSpec struct {
// It allows to configure the transport between Traefik and your servers.
// Can only be used on a Kubernetes Service.
ServersTransport string `json:"serversTransport,omitempty"`
// Weight defines the weight and should only be specified when Name references a TraefikService object
// (and to be precise, one that embeds a Weighted Round Robin).
Weight *int `json:"weight,omitempty"`
// NativeLB controls, when creating the load-balancer,
// whether the LB's children are directly the pods IPs or if the only child is the Kubernetes Service clusterIP.
// The Kubernetes Service itself does load-balance to the pods.
// By default, NativeLB is false.
NativeLB bool `json:"nativeLB,omitempty"`
}
// Service defines an upstream HTTP service to proxy traffic to.

5
pkg/provider/kubernetes/crd/traefikio/v1alpha1/ingressroutetcp.go
View file

@ -78,6 +78,11 @@ type ServiceTCP struct {
// ProxyProtocol defines the PROXY protocol configuration.
// More info: https://doc.traefik.io/traefik/v2.9/routing/services/#proxy-protocol
ProxyProtocol *dynamic.ProxyProtocol `json:"proxyProtocol,omitempty"`
// NativeLB controls, when creating the load-balancer,
// whether the LB's children are directly the pods IPs or if the only child is the Kubernetes Service clusterIP.
// The Kubernetes Service itself does load-balance to the pods.
// By default, NativeLB is false.
NativeLB bool `json:"nativeLB,omitempty"`
}
// +genclient

5
pkg/provider/kubernetes/crd/traefikio/v1alpha1/ingressrouteudp.go
View file

@ -33,6 +33,11 @@ type ServiceUDP struct {
Port intstr.IntOrString `json:"port"`
// Weight defines the weight used when balancing requests between multiple Kubernetes Service.
Weight *int `json:"weight,omitempty"`
// NativeLB controls, when creating the load-balancer,
// whether the LB's children are directly the pods IPs or if the only child is the Kubernetes Service clusterIP.
// The Kubernetes Service itself does load-balance to the pods.
// By default, NativeLB is false.
NativeLB bool `json:"nativeLB,omitempty"`
}
// +genclient

1
pkg/provider/kubernetes/ingress/annotations.go
View file

@ -45,6 +45,7 @@ type ServiceIng struct {
ServersTransport string `json:"serversTransport,omitempty"`
PassHostHeader *bool `json:"passHostHeader"`
Sticky *dynamic.Sticky `json:"sticky,omitempty" label:"allowEmpty"`
NativeLB bool `json:"nativeLB,omitempty"`
}
// SetDefaults sets the default values.

2
pkg/provider/kubernetes/ingress/annotations_test.go
View file

@ -106,6 +106,7 @@ func Test_parseServiceConfig(t *testing.T) {
"traefik.ingress.kubernetes.io/service.serversscheme": "protocol",
"traefik.ingress.kubernetes.io/service.serverstransport": "foobar@file",
"traefik.ingress.kubernetes.io/service.passhostheader": "true",
"traefik.ingress.kubernetes.io/service.nativelb": "true",
"traefik.ingress.kubernetes.io/service.sticky.cookie": "true",
"traefik.ingress.kubernetes.io/service.sticky.cookie.httponly": "true",
"traefik.ingress.kubernetes.io/service.sticky.cookie.name": "foobar",
@ -125,6 +126,7 @@ func Test_parseServiceConfig(t *testing.T) {
ServersScheme: "protocol",
ServersTransport: "foobar@file",
PassHostHeader: Bool(true),
NativeLB: true,
},
},
},

15
pkg/provider/kubernetes/ingress/fixtures/Ingress-with-native-service-lb_ingress.yml Normal file
View file

@ -0,0 +1,15 @@
kind: Ingress
apiVersion: networking.k8s.io/v1beta1
metadata:
name: ""
namespace: testing
spec:
rules:
- host: traefik.tchouk
http:
paths:
- path: /bar
backend:
serviceName: service1
servicePort: 8080

15
pkg/provider/kubernetes/ingress/fixtures/Ingress-with-native-service-lb_service.yml Normal file
View file

@ -0,0 +1,15 @@
kind: Service
apiVersion: v1
metadata:
name: service1
namespace: testing
annotations:
traefik.ingress.kubernetes.io/service.nativelb: "true"
spec:
ports:
- port: 8080
clusterIP: 10.0.0.1
type: ClusterIP
externalName: traefik.wtf

27
pkg/provider/kubernetes/ingress/kubernetes.go
View file

@ -538,6 +538,21 @@ func (p *Provider) loadService(client Client, namespace string, backend networki
if svcConfig.Service.ServersTransport != "" {
svc.LoadBalancer.ServersTransport = svcConfig.Service.ServersTransport
}
if svcConfig.Service.NativeLB {
address, err := getNativeServiceAddress(*service, portSpec)
if err != nil {
return nil, fmt.Errorf("getting native Kubernetes Service address: %w", err)
}
protocol := getProtocol(portSpec, portSpec.Name, svcConfig)
svc.LoadBalancer.Servers = []dynamic.Server{
{URL: fmt.Sprintf("%s://%s", protocol, address)},
}
return svc, nil
}
}
if service.Spec.Type == corev1.ServiceTypeExternalName {
@ -587,6 +602,18 @@ func (p *Provider) loadService(client Client, namespace string, backend networki
return svc, nil
}
func getNativeServiceAddress(service corev1.Service, svcPort corev1.ServicePort) (string, error) {
if service.Spec.ClusterIP == "None" {
return "", fmt.Errorf("no clusterIP on headless service: %s/%s", service.Namespace, service.Name)
}
if service.Spec.ClusterIP == "" {
return "", fmt.Errorf("no clusterIP found for service: %s/%s", service.Namespace, service.Name)
}
return net.JoinHostPort(service.Spec.ClusterIP, strconv.Itoa(int(svcPort.Port))), nil
}
func getProtocol(portSpec corev1.ServicePort, portName string, svcConfig *ServiceConfig) string {
if svcConfig != nil && svcConfig.Service != nil && svcConfig.Service.ServersScheme != "" {
return svcConfig.Service.ServersScheme

82
pkg/provider/kubernetes/ingress/kubernetes_test.go
View file

@ -5,6 +5,7 @@ import (
"errors"
"math"
"os"
"path/filepath"
"strings"
"testing"
@ -1790,8 +1791,87 @@ func TestLoadConfigurationFromIngressesWithExternalNameServices(t *testing.T) {
}
}
func TestLoadConfigurationFromIngressesWithNativeLB(t *testing.T) {
testCases := []struct {
desc string
ingressClass string
serverVersion string
expected *dynamic.Configuration
}{
{
desc: "Ingress with native service lb",
expected: &dynamic.Configuration{
TCP: &dynamic.TCPConfiguration{},
HTTP: &dynamic.HTTPConfiguration{
Middlewares: map[string]*dynamic.Middleware{},
Routers: map[string]*dynamic.Router{
"testing-traefik-tchouk-bar": {
Rule: "Host(`traefik.tchouk`) && PathPrefix(`/bar`)",
Service: "testing-service1-8080",
},
},
Services: map[string]*dynamic.Service{
"testing-service1-8080": {
LoadBalancer: &dynamic.ServersLoadBalancer{
PassHostHeader: Bool(true),
Servers: []dynamic.Server{
{
URL: "http://10.0.0.1:8080",
},
},
},
},
},
},
},
},
}
for _, test := range testCases {
test := test
t.Run(test.desc, func(t *testing.T) {
t.Parallel()
var paths []string
_, err := os.Stat(generateTestFilename("_ingress", test.desc))
if err == nil {
paths = append(paths, generateTestFilename("_ingress", test.desc))
}
_, err = os.Stat(generateTestFilename("_endpoint", test.desc))
if err == nil {
paths = append(paths, generateTestFilename("_endpoint", test.desc))
}
_, err = os.Stat(generateTestFilename("_service", test.desc))
if err == nil {
paths = append(paths, generateTestFilename("_service", test.desc))
}
_, err = os.Stat(generateTestFilename("_secret", test.desc))
if err == nil {
paths = append(paths, generateTestFilename("_secret", test.desc))
}
_, err = os.Stat(generateTestFilename("_ingressclass", test.desc))
if err == nil {
paths = append(paths, generateTestFilename("_ingressclass", test.desc))
}
serverVersion := test.serverVersion
if serverVersion == "" {
serverVersion = "v1.17"
}
clientMock := newClientMock(serverVersion, paths...)
p := Provider{IngressClass: test.ingressClass}
conf := p.loadConfigurationFromIngresses(context.Background(), clientMock)
assert.Equal(t, test.expected, conf)
})
}
}
func generateTestFilename(suffix, desc string) string {
return "./fixtures/" + strings.ReplaceAll(desc, " ", "-") + suffix + ".yml"
return filepath.Join("fixtures", strings.ReplaceAll(desc, " ", "-")+suffix+".yml")
}
func TestGetCertificates(t *testing.T) {