85 lines
4 KiB
Markdown
85 lines
4 KiB
Markdown
---
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title: "Traefik V3 Migration Documentation"
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description: "Migrate from Traefik Proxy v2 to v3 and update all the necessary configurations to take advantage of all the improvements. Read the technical documentation."
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---
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# Migration Guide: From v2 to v3
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How to Migrate from Traefik v2 to Traefik v3.
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{: .subtitle }
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The version 3 of Traefik introduces a number of breaking changes,
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which require one to update their configuration when they migrate from v2 to v3.
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The goal of this page is to recapitulate all of these changes, and in particular to give examples,
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feature by feature, of how the configuration looked like in v2, and how it now looks like in v3.
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## IPWhiteList
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In v3, we renamed the `IPWhiteList` middleware to `IPAllowList` without changing anything to the configuration.
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## gRPC Metrics
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In v3, the reported status code for gRPC requests is now the value of the `Grpc-Status` header.
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## Deprecated Options Removal
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- The `pilot` option has been removed from the static configuration.
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- The `tracing.datadog.globaltag` option has been removed.
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- The `namespace` option of Consul, Consul Catalog and Nomad providers has been removed.
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- The `tls.caOptional` option has been removed from the ForwardAuth middleware, as well as from the HTTP, Consul, Etcd, Redis, ZooKeeper, Consul Catalog, and Docker providers.
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- `sslRedirect`, `sslTemporaryRedirect`, `sslHost`, `sslForceHost` and `featurePolicy` options of the Headers middleware have been removed.
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- The `forceSlash` option of the StripPrefix middleware has been removed.
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- The `preferServerCipherSuites` option has been removed.
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## Matchers
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In v3, the `Headers` and `HeadersRegexp` matchers have been renamed to `Header` and `HeaderRegexp` respectively.
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`PathPrefix` no longer uses regular expressions to match path prefixes.
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`QueryRegexp` has been introduced to match query values using a regular expression.
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`HeaderRegexp`, `HostRegexp`, `PathRegexp`, `QueryRegexp`, and `HostSNIRegexp` matchers now uses the [Go regexp syntax](https://golang.org/pkg/regexp/syntax/).
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All matchers now take a single value (except `Header`, `HeaderRegexp`, `Query`, and `QueryRegexp` which take two)
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and should be explicitly combined using logical operators to mimic previous behavior.
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`Query` can take a single value to match is the query value that has no value (e.g. `/search?mobile`).
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`HostHeader` has been removed, use `Host` instead.
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## Content-Type Auto-Detection
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In v3, the `Content-Type` header is not auto-detected anymore when it is not set by the backend.
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One should use the `ContentType` middleware to enable the `Content-Type` header value auto-detection.
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## HTTP/3
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In v3, HTTP/3 is no longer an experimental feature.
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The `experimental.http3` option has been removed from the static configuration.
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## TCP ServersTransport
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In v3, the support of `TCPServersTransport` has been introduced.
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When using the KubernetesCRD provider, it is therefore necessary to update [RBAC](../reference/dynamic-configuration/kubernetes-crd.md#rbac) and [CRD](../reference/dynamic-configuration/kubernetes-crd.md) manifests.
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### TCP LoadBalancer `terminationDelay` option
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The TCP LoadBalancer `terminationDelay` option has been removed.
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This option can now be configured directly on the `TCPServersTransport` level, please take a look at this [documentation](../routing/services/index.md#terminationdelay)
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## Rancher v1
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In v3, the rancher v1 provider has been removed because Rancher v1 is [no longer actively maintaned](https://rancher.com/docs/os/v1.x/en/support/) and v2 is supported as a standard Kubernetes provider.
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Rancher 2.x requires Kubernetes and does not have a metadata endpoint of its own for Traefik to query.
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As such, Rancher 2.x users should utilize the [Kubernetes CRD provider](../providers/kubernetes-crd.md) directly.
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## Marathon provider
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In v3, the Marathon provider has been removed.
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## InfluxDB v1
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In v3, the InfluxDB v1 metrics provider has been removed because InfluxDB v1.x maintenance [ended in 2021](https://www.influxdata.com/blog/influxdb-oss-and-enterprise-roadmap-update-from-influxdays-emea/).
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