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| title | description |
|---|---|
| Traefik Migration Documentation | Learn the steps needed to migrate to new Traefik Proxy v2 versions, i.e. v2.0 to v2.1 or v2.1 to v2.2. Read the technical documentation. |
Migration: Steps needed between the versions
v2.0 to v2.1
Kubernetes CRD
In v2.1, a new Kubernetes CRD called TraefikService was added.
While updating an installation to v2.1,
one should apply that CRD, and update the existing ClusterRole definition to allow Traefik to use that CRD.
To add that CRD and enhance the permissions, the following definitions need to be applied to the cluster.
apiVersion: apiextensions.k8s.io/v1beta1
kind: CustomResourceDefinition
metadata:
name: traefikservices.traefik.containo.us
spec:
group: traefik.containo.us
version: v1alpha1
names:
kind: TraefikService
plural: traefikservices
singular: traefikservice
scope: Namespaced
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1beta1
metadata:
name: traefik-ingress-controller
rules:
- apiGroups:
- ""
resources:
- services
- endpoints
- secrets
verbs:
- get
- list
- watch
- apiGroups:
- extensions
- networking.k8s.io
resources:
- ingresses
verbs:
- get
- list
- watch
- apiGroups:
- extensions
- networking.k8s.io
resources:
- ingresses/status
verbs:
- update
- apiGroups:
- traefik.containo.us
resources:
- middlewares
- ingressroutes
- traefikservices
- ingressroutetcps
- tlsoptions
verbs:
- get
- list
- watch
After having both resources applied, Traefik will work properly.
v2.1 to v2.2
Headers middleware: accessControlAllowOrigin
accessControlAllowOrigin is deprecated.
This field will be removed in future 2.x releases.
Please configure your allowed origins in accessControlAllowOriginList instead.
Kubernetes CRD
In v2.2, new Kubernetes CRDs called TLSStore and IngressRouteUDP were added.
While updating an installation to v2.2,
one should apply that CRDs, and update the existing ClusterRole definition to allow Traefik to use that CRDs.
To add that CRDs and enhance the permissions, the following definitions need to be applied to the cluster.
apiVersion: apiextensions.k8s.io/v1beta1
kind: CustomResourceDefinition
metadata:
name: tlsstores.traefik.containo.us
spec:
group: traefik.containo.us
version: v1alpha1
names:
kind: TLSStore
plural: tlsstores
singular: tlsstore
scope: Namespaced
apiVersion: apiextensions.k8s.io/v1beta1
kind: CustomResourceDefinition
metadata:
name: ingressrouteudps.traefik.containo.us
spec:
group: traefik.containo.us
version: v1alpha1
names:
kind: IngressRouteUDP
plural: ingressrouteudps
singular: ingressrouteudp
scope: Namespaced
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1beta1
metadata:
name: traefik-ingress-controller
rules:
- apiGroups:
- ""
resources:
- services
- endpoints
- secrets
verbs:
- get
- list
- watch
- apiGroups:
- extensions
- networking.k8s.io
resources:
- ingresses
verbs:
- get
- list
- watch
- apiGroups:
- extensions
- networking.k8s.io
resources:
- ingresses/status
verbs:
- update
- apiGroups:
- traefik.containo.us
resources:
- middlewares
- ingressroutes
- traefikservices
- ingressroutetcps
- ingressrouteudps
- tlsoptions
- tlsstores
verbs:
- get
- list
- watch
After having both resources applied, Traefik will work properly.
Kubernetes Ingress
To enable HTTPS, it is not sufficient anymore to only rely on a TLS section in the Ingress.
Expose an Ingress on 80 and 443
Define the default TLS configuration on the HTTPS entry point.
kind: Ingress
apiVersion: networking.k8s.io/v1beta1
metadata:
name: example
spec:
tls:
- secretName: my-tls-secret
rules:
- host: example.com
http:
paths:
- path: "/foo"
backend:
serviceName: example-com
servicePort: 80
Entry points definition and enable Ingress provider:
# Static configuration
entryPoints:
web:
address: :80
websecure:
address: :443
http:
tls: {}
providers:
kubernetesIngress: {}
# Static configuration
[entryPoints.web]
address = ":80"
[entryPoints.websecure]
address = ":443"
[entryPoints.websecure.http]
[entryPoints.websecure.http.tls]
[providers.kubernetesIngress]
# Static configuration
--entryPoints.web.address=:80
--entryPoints.websecure.address=:443
--entryPoints.websecure.http.tls=true
--providers.kubernetesIngress=true
Use TLS only on one Ingress
Define the TLS restriction with annotations.
kind: Ingress
apiVersion: networking.k8s.io/v1beta1
metadata:
name: example-tls
annotations:
traefik.ingress.kubernetes.io/router.entrypoints: websecure
traefik.ingress.kubernetes.io/router.tls: "true"
spec:
tls:
- secretName: my-tls-secret
rules:
- host: example.com
http:
paths:
- path: ""
backend:
serviceName: example-com
servicePort: 80
Entry points definition and enable Ingress provider:
# Static configuration
entryPoints:
web:
address: :80
websecure:
address: :443
providers:
kubernetesIngress: {}
# Static configuration
[entryPoints.web]
address = ":80"
[entryPoints.websecure]
address = ":443"
[providers.kubernetesIngress]
# Static configuration
--entryPoints.web.address=:80
--entryPoints.websecure.address=:443
--providers.kubernetesIngress=true
v2.2.2 to v2.2.5
InsecureSNI removal
In v2.2.2 we introduced a new flag (insecureSNI) which was available as a global option to disable domain fronting.
Since v2.2.5 this global option has been removed, and you should not use it anymore.
HostSNI rule matcher removal
In v2.2.2 we introduced a new rule matcher (HostSNI) for HTTP routers which was allowing to match the Server Name Indication at the router level.
Since v2.2.5 this rule has been removed for HTTP routers, and you should not use it anymore.
v2.2 to v2.3
X.509 CommonName Deprecation
The deprecated, legacy behavior of treating the CommonName field on X.509 certificates as a host name when no Subject Alternative Names are present, is now disabled by default.
It means that if one is using https with your backend servers, and a certificate with only a CommonName, Traefik will not try to match the server name indication with the CommonName anymore.
It can be temporarily re-enabled by adding the value x509ignoreCN=0 to the GODEBUG environment variable.
More information: https://golang.org/doc/go1.15#commonname
File Provider
The file parser has been changed, since v2.3 the unknown options/fields in a dynamic configuration file are treated as errors.
IngressClass
In v2.3, the support of IngressClass, which is available since Kubernetes version 1.18, has been introduced.
In order to be able to use this new resource the Kubernetes RBAC must be updated.
v2.3 to v2.4
ServersTransport
In v2.4.0, the support of ServersTransport has been introduced.
It is therefore necessary to update RBAC and CRD definitions.
v2.4.7 to v2.4.8
Non-ASCII Domain Names
In v2.4.8, we introduced a new check on domain names used in HTTP router rule Host and HostRegexp expressions,
and in TCP router rule HostSNI expression.
This check ensures that provided domain names don't contain non-ASCII characters.
If not, an error is raised, and the associated router will be shown as invalid in the dashboard.
This new behavior is intended to show what was failing silently previously and to help troubleshooting configuration issues. It doesn't change the support for non-ASCII domain names in routers rules, which is not part of the Traefik feature set so far.
In order to use non-ASCII domain names in a router's rule, one should use the Punycode form of the domain name. For more information, please read the HTTP routers rule part or TCP router rules part of the documentation.
v2.4.8 to v2.4.9
Tracing Span
In v2.4.9, we changed span error to log only server errors (>= 500).
v2.4.9 to v2.4.10
K8S CrossNamespace
In v2.4.10, the default value for allowCrossNamespace has been changed to false.
K8S ExternalName Service
In v2.4.10, by default, it is no longer authorized to reference Kubernetes ExternalName services.
To allow it, the allowExternalNameServices option should be set to true.
v2.4 to v2.5
Kubernetes CRD
In v2.5, the Traefik CRDs have been updated to support the new API version apiextensions.k8s.io/v1.
As required by apiextensions.k8s.io/v1, we have included the OpenAPI validation schema.
After deploying the new Traefik CRDs, the resources will be validated only on creation or update.
Please note that the unknown fields will not be pruned when migrating from apiextensions.k8s.io/v1beta1 to apiextensions.k8s.io/v1 CRDs.
For more details check out the official documentation.
Kubernetes Ingress
Traefik v2.5 moves forward for the Ingress provider to support Kubernetes v1.22.
Traefik now supports only v1.14+ Kubernetes clusters, which means the support of extensions/v1beta1 API Version ingresses has been dropped.
The extensions/v1beta1 API Version should now be replaced either by networking.k8s.io/v1beta1 or by networking.k8s.io/v1 (as of Kubernetes v1.19+).
The support of the networking.k8s.io/v1beta1 API Version will stop in Kubernetes v1.22.
Headers middleware: ssl redirect options
sslRedirect, sslTemporaryRedirect, sslHost and sslForceHost are deprecated in Traefik v2.5.
For simple HTTP to HTTPS redirection, you may use EntryPoints redirections.
For more advanced use cases, you can use either the RedirectScheme middleware or the RedirectRegex middleware.
Headers middleware: accessControlAllowOrigin
accessControlAllowOrigin is no longer supported in Traefik v2.5.
X.509 CommonName Deprecation Bis
Following up on the deprecation started previously,
as the x509ignoreCN=0 value for the GODEBUG is deprecated in Go 1.17,
the legacy behavior related to the CommonName field can not be enabled at all anymore.
v2.5.3 to v2.5.4
Errors middleware
In v2.5.4, when the errors service is configured with the PassHostHeader option to true (default),
the forwarded Host header value is now set to the client request Host value and not 0.0.0.0.
Check out the Errors middleware documentation for more details.
v2.5 to v2.6
HTTP/3
Traefik v2.6 introduces the AdvertisedPort option,
which allows advertising, in the Alt-Svc header, a UDP port different from the one on which Traefik is actually listening (the EntryPoint's port).
By doing so, it introduces a new configuration structure http3, which replaces the enableHTTP3 option (which therefore doesn't exist anymore).
To enable HTTP/3 on an EntryPoint, please check out the HTTP/3 configuration documentation.
Kubernetes Gateway API Provider
In v2.6, the Kubernetes Gateway API provider now only supports the version v1alpha2 of the specification and
route namespaces selectors, which requires Traefik to fetch and watch the cluster namespaces.
Therefore, the RBAC and CRD definitions must be updated.
v2.6.0 to v2.6.1
Metrics
In v2.6.1, the metrics system does not support any more custom HTTP method verbs to prevent potential metrics cardinality overhead.
In consequence, for metrics having the method label,
if the HTTP method verb of a request is not one defined in the set of common methods for HTTP/1.1
or the PRI verb (for HTTP/2),
the value for the method label becomes EXTENSION_METHOD, instead of the request's one.
Tracing
In v2.6.1, the Datadog tags added to a span changed from service.name to traefik.service.name and from router.name to traefik.router.name.
v2.8
TLS client authentication
In v2.8, the caOptional option is deprecated as TLS client authentication is a server side option.
This option available in the ForwardAuth middleware, as well as in the HTTP, Consul, Etcd, Redis, ZooKeeper, Marathon, Consul Catalog, and Docker providers has no effect and must not be used anymore.
Consul Enterprise Namespaces
In v2.8, the namespace option of Consul and Consul Catalog providers is deprecated, please use the namespaces options instead.
Traefik Pilot
In v2.8, the pilot.token and pilot.dashboard options are deprecated.
Please check our Blog for migration instructions later this year.
v2.8.2
Since v2.5.0, the PreferServerCipherSuites is deprecated and ignored by Go,
in v2.8.2 the preferServerCipherSuites option is also deprecated and ignored in Traefik.
In v2.8.2, Traefik now reject certificates signed with the SHA-1 hash function. (details)
v2.9
Traefik Pilot
In v2.9, Traefik Pilot support has been removed.