707 lines
19 KiB
Markdown
707 lines
19 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,
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and in particular to give examples, feature by feature,
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of how the configuration looked like in v2,
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and how it now looks like in v3.
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## Static configuration
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### Docker & Docker Swarm
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#### SwarmMode
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In v3, the provider Docker has been split into 2 providers:
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- Docker provider (without Swarm support)
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- Swarm provider (Swarm support only)
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??? example "An example usage of v2 Docker provider with Swarm"
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```yaml tab="File (YAML)"
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providers:
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docker:
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swarmMode: true
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```
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```toml tab="File (TOML)"
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[providers.docker]
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swarmMode=true
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```
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```bash tab="CLI"
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--providers.docker.swarmMode=true
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```
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This configuration is now unsupported and would prevent Traefik to start.
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##### Remediation
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In v3, the `swarmMode` should not be used with the Docker provider, and, to use Swarm, the Swarm provider should be used instead.
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??? example "An example usage of the Swarm provider"
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```yaml tab="File (YAML)"
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providers:
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swarm:
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endpoint: "tcp://127.0.0.1:2377"
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```
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```toml tab="File (TOML)"
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[providers.swarm]
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endpoint="tcp://127.0.0.1:2377"
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```
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```bash tab="CLI"
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--providers.swarm.endpoint=tcp://127.0.0.1:2377
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```
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#### TLS.CAOptional
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Docker provider `tls.CAOptional` option has been removed in v3, as TLS client authentication is a server side option (see https://pkg.go.dev/crypto/tls#ClientAuthType).
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??? example "An example usage of the TLS.CAOptional option"
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```yaml tab="File (YAML)"
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providers:
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docker:
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tls:
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caOptional: true
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```
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```toml tab="File (TOML)"
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[providers.docker.tls]
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caOptional=true
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```
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```bash tab="CLI"
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--providers.docker.tls.caOptional=true
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```
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##### Remediation
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The `tls.caOptional` option should be removed from the Docker provider static configuration.
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### Experimental Configuration
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#### HTTP3
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In v3, HTTP/3 is no longer an experimental feature.
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It can be enabled on entry points without the associated `experimental.http3` option, which is now removed.
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It is now unsupported and would prevent Traefik to start.
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??? example "An example usage of v2 Experimental `http3` option"
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```yaml tab="File (YAML)"
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experimental:
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http3: true
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```
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```toml tab="File (TOML)"
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[experimental]
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http3=true
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```
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```bash tab="CLI"
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--experimental.http3=true
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```
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##### Remediation
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The `http3` option should be removed from the static configuration experimental section.
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### Consul provider
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#### namespace
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The Consul provider `namespace` option was deprecated in v2 and is now removed in v3.
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It is now unsupported and would prevent Traefik to start.
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??? example "An example usage of v2 Consul `namespace` option"
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```yaml tab="File (YAML)"
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consul:
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namespace: foobar
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```
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```toml tab="File (TOML)"
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[consul]
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namespace=foobar
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```
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```bash tab="CLI"
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--consul.namespace=foobar
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```
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##### Remediation
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In v3, the `namespaces` option should be used instead of the `namespace` option.
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??? example "An example usage of Consul `namespaces` option"
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```yaml tab="File (YAML)"
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consul:
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namespaces:
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- foobar
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```
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```toml tab="File (TOML)"
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[consul]
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namespaces=["foobar"]
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```
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```bash tab="CLI"
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--consul.namespaces=foobar
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```
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#### TLS.CAOptional
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Consul provider `tls.CAOptional` option has been removed in v3, as TLS client authentication is a server side option (see https://pkg.go.dev/crypto/tls#ClientAuthType).
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??? example "An example usage of the TLS.CAOptional option"
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```yaml tab="File (YAML)"
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providers:
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consul:
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tls:
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caOptional: true
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```
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```toml tab="File (TOML)"
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[providers.consul.tls]
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caOptional=true
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```
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```bash tab="CLI"
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--providers.consul.tls.caOptional=true
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```
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##### Remediation
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The `tls.caOptional` option should be removed from the Consul provider static configuration.
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### ConsulCatalog provider
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#### namespace
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The ConsulCatalog provider `namespace` option was deprecated in v2 and is now removed in v3.
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It is now unsupported and would prevent Traefik to start.
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??? example "An example usage of v2 ConsulCatalog `namespace` option"
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```yaml tab="File (YAML)"
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consulCatalog:
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namespace: foobar
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```
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```toml tab="File (TOML)"
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[consulCatalog]
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namespace=foobar
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```
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```bash tab="CLI"
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--consulCatalog.namespace=foobar
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```
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##### Remediation
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In v3, the `namespaces` option should be used instead of the `namespace` option.
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??? example "An example usage of ConsulCatalog `namespaces` option"
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```yaml tab="File (YAML)"
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consulCatalog:
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namespaces:
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- foobar
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```
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```toml tab="File (TOML)"
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[consulCatalog]
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namespaces=["foobar"]
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```
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```bash tab="CLI"
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--consulCatalog.namespaces=foobar
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```
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#### Endpoint.TLS.CAOptional
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ConsulCatalog provider `endpoint.tls.CAOptional` option has been removed in v3, as TLS client authentication is a server side option (see https://pkg.go.dev/crypto/tls#ClientAuthType).
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??? example "An example usage of the Endpoint.TLS.CAOptional option"
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```yaml tab="File (YAML)"
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providers:
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consulCatalog:
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endpoint:
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tls:
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caOptional: true
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```
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```toml tab="File (TOML)"
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[providers.consulCatalog.endpoint.tls]
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caOptional=true
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```
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```bash tab="CLI"
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--providers.consulCatalog.endpoint.tls.caOptional=true
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```
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##### Remediation
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The `endpoint.tls.caOptional` option should be removed from the ConsulCatalog provider static configuration.
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### Nomad provider
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#### namespace
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The Nomad provider `namespace` option was deprecated in v2 and is now removed in v3.
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It is now unsupported and would prevent Traefik to start.
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??? example "An example usage of v2 Nomad `namespace` option"
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```yaml tab="File (YAML)"
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nomad:
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namespace: foobar
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```
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```toml tab="File (TOML)"
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[nomad]
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namespace=foobar
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```
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```bash tab="CLI"
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--nomad.namespace=foobar
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```
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##### Remediation
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In v3, the `namespaces` option should be used instead of the `namespace` option.
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??? example "An example usage of Nomad `namespaces` option"
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```yaml tab="File (YAML)"
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nomad:
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namespaces:
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- foobar
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```
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```toml tab="File (TOML)"
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[nomad]
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namespaces=["foobar"]
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```
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```bash tab="CLI"
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--nomad.namespaces=foobar
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```
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#### Endpoint.TLS.CAOptional
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Nomad provider `endpoint.tls.CAOptional` option has been removed in v3, as TLS client authentication is a server side option (see https://pkg.go.dev/crypto/tls#ClientAuthType).
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??? example "An example usage of the Endpoint.TLS.CAOptional option"
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```yaml tab="File (YAML)"
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providers:
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nomad:
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endpoint:
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tls:
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caOptional: true
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```
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```toml tab="File (TOML)"
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[providers.nomad.endpoint.tls]
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caOptional=true
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```
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```bash tab="CLI"
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--providers.nomad.endpoint.tls.caOptional=true
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```
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##### Remediation
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The `endpoint.tls.caOptional` option should be removed from the Nomad provider static configuration.
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### Rancher v1 Provider
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In v3, the Rancher v1 provider has been removed because Rancher v1 is [no longer actively maintained](https://rancher.com/docs/os/v1.x/en/support/),
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and Rancher v2 is supported as a standard Kubernetes provider.
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??? example "An example of Traefik v2 Rancher v1 configuration"
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```yaml tab="File (YAML)"
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providers:
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rancher: {}
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```
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```toml tab="File (TOML)"
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[providers.rancher]
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```
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```bash tab="CLI"
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--providers.rancher=true
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```
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This configuration is now unsupported and would prevent Traefik to start.
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#### Remediation
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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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Also, all Rancher provider related configuration should be removed from the static configuration.
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### Marathon provider
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Marathon maintenance [ended on October 31, 2021](https://github.com/mesosphere/marathon/blob/master/README.md).
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In v3, the Marathon provider has been removed.
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??? example "An example of v2 Marathon provider configuration"
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```yaml tab="File (YAML)"
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providers:
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marathon: {}
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```
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```toml tab="File (TOML)"
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[providers.marathon]
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```
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```bash tab="CLI"
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--providers.marathon=true
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```
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This configuration is now unsupported and would prevent Traefik to start.
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#### Remediation
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All Marathon provider related configuration should be removed from the static configuration.
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### HTTP Provider
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#### TLS.CAOptional
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HTTP provider `tls.CAOptional` option has been removed in v3, as TLS client authentication is a server side option (see https://pkg.go.dev/crypto/tls#ClientAuthType).
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??? example "An example usage of the TLS.CAOptional option"
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```yaml tab="File (YAML)"
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providers:
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http:
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tls:
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caOptional: true
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```
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```toml tab="File (TOML)"
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[providers.http.tls]
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caOptional=true
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```
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```bash tab="CLI"
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--providers.http.tls.caOptional=true
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```
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##### Remediation
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The `tls.caOptional` option should be removed from the HTTP provider static configuration.
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### ETCD Provider
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#### TLS.CAOptional
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ETCD provider `tls.CAOptional` option has been removed in v3, as TLS client authentication is a server side option (see https://pkg.go.dev/crypto/tls#ClientAuthType).
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??? example "An example usage of the TLS.CAOptional option"
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```yaml tab="File (YAML)"
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providers:
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etcd:
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tls:
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caOptional: true
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```
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```toml tab="File (TOML)"
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[providers.etcd.tls]
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caOptional=true
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```
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```bash tab="CLI"
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--providers.etcd.tls.caOptional=true
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```
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##### Remediation
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The `tls.caOptional` option should be removed from the ETCD provider static configuration.
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### Redis Provider
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#### TLS.CAOptional
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Redis provider `tls.CAOptional` option has been removed in v3, as TLS client authentication is a server side option (see https://pkg.go.dev/crypto/tls#ClientAuthType).
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??? example "An example usage of the TLS.CAOptional option"
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```yaml tab="File (YAML)"
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providers:
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redis:
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tls:
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caOptional: true
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```
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```toml tab="File (TOML)"
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[providers.redis.tls]
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caOptional=true
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```
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```bash tab="CLI"
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--providers.redis.tls.caOptional=true
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```
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##### Remediation
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The `tls.caOptional` option should be removed from the Redis provider static configuration.
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### InfluxDB v1
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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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In v3, the InfluxDB v1 metrics provider has been removed.
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??? example "An example of Traefik v2 InfluxDB v1 metrics configuration"
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```yaml tab="File (YAML)"
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metrics:
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influxDB: {}
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```
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```toml tab="File (TOML)"
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[metrics.influxDB]
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```
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```bash tab="CLI"
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--metrics.influxDB=true
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```
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This configuration is now unsupported and would prevent Traefik to start.
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#### Remediation
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All InfluxDB v1 metrics provider related configuration should be removed from the static configuration.
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### Pilot
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Traefik Pilot is no longer available since October 4th, 2022.
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??? example "An example of v2 Pilot configuration"
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```yaml tab="File (YAML)"
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pilot:
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token: foobar
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```
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```toml tab="File (TOML)"
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[pilot]
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token=foobar
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```
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```bash tab="CLI"
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--pilot.token=foobar
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```
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In v2, Pilot configuration was deprecated and ineffective,
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it is now unsupported and would prevent Traefik to start.
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#### Remediation
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All Pilot related configuration should be removed from the static configuration.
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## Dynamic configuration
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### Router Rule Matchers
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In v3, a new rule matchers syntax has been introduced for HTTP and TCP routers.
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The default rule matchers syntax is now the v3 one, but for backward compatibility this can be configured.
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The v2 rule matchers syntax is deprecated and its support will be removed in the next major version.
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For this reason, we encourage migrating to the new syntax.
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By default, the `defaultRuleSyntax` static option is automatically set to `v3`, meaning that the default rule is the new one.
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#### New V3 Syntax Notable Changes
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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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#### Remediation
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##### Configure the Default Syntax In Static Configuration
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The default rule matchers syntax is the expected syntax for any router that is not self opt-out from this default value.
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It can be configured in the static configuration.
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??? example "An example configuration for the default rule matchers syntax"
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```yaml tab="File (YAML)"
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# static configuration
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core:
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defaultRuleSyntax: v2
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```
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```toml tab="File (TOML)"
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# static configuration
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[core]
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defaultRuleSyntax="v2"
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```
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```bash tab="CLI"
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# static configuration
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--core.defaultRuleSyntax=v2
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```
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##### Configure the Syntax Per Router
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The rule syntax can also be configured on a per-router basis.
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This allows to have heterogeneous router configurations and ease migration.
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??? example "An example router with syntax configuration"
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```yaml tab="Docker & Swarm"
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labels:
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- "traefik.http.routers.test.ruleSyntax=v2"
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```
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|
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```yaml tab="Kubernetes"
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apiVersion: traefik.io/v1alpha1
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kind: IngressRoute
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metadata:
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name: test.route
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namespace: default
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spec:
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routes:
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- match: PathPrefix(`/foo`, `/bar`)
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syntax: v2
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kind: Rule
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```
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|
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```yaml tab="Consul Catalog"
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- "traefik.http.routers.test.ruleSyntax=v2"
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```
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```yaml tab="File (YAML)"
|
|
http:
|
|
routers:
|
|
test:
|
|
ruleSyntax: v2
|
|
```
|
|
|
|
```toml tab="File (TOML)"
|
|
[http.routers]
|
|
[http.routers.test]
|
|
ruleSyntax = "v2"
|
|
```
|
|
|
|
### IPWhiteList
|
|
|
|
In v3, we renamed the `IPWhiteList` middleware to `IPAllowList` without changing anything to the configuration.
|
|
|
|
### Deprecated Options Removal
|
|
|
|
- The `tracing.datadog.globaltag` option has been removed.
|
|
- 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.
|
|
- `sslRedirect`, `sslTemporaryRedirect`, `sslHost`, `sslForceHost` and `featurePolicy` options of the Headers middleware have been removed.
|
|
- The `forceSlash` option of the StripPrefix middleware has been removed.
|
|
- The `preferServerCipherSuites` option has been removed.
|
|
|
|
### TCP LoadBalancer `terminationDelay` option
|
|
|
|
The TCP LoadBalancer `terminationDelay` option has been removed.
|
|
This option can now be configured directly on the `TCPServersTransport` level, please take a look at this [documentation](../routing/services/index.md#terminationdelay)
|
|
|
|
### Kubernetes CRDs API Group `traefik.containo.us`
|
|
|
|
In v3, the Kubernetes CRDs API Group `traefik.containo.us` has been removed.
|
|
Please use the API Group `traefik.io` instead.
|
|
|
|
### Kubernetes Ingress API Group `networking.k8s.io/v1beta1`
|
|
|
|
In v3, the Kubernetes Ingress API Group `networking.k8s.io/v1beta1` ([removed since Kubernetes v1.22](https://kubernetes.io/docs/reference/using-api/deprecation-guide/#ingress-v122)) support has been removed.
|
|
|
|
Please use the API Group `networking.k8s.io/v1` instead.
|
|
|
|
### Traefik CRD API Version `apiextensions.k8s.io/v1beta1`
|
|
|
|
In v3, the Traefik CRD API Version `apiextensions.k8s.io/v1beta1` ([removed since Kubernetes v1.22](https://kubernetes.io/docs/reference/using-api/deprecation-guide/#customresourcedefinition-v122)) support has been removed.
|
|
|
|
Please use the CRD definition with the API Version `apiextensions.k8s.io/v1` instead.
|
|
|
|
## Operations
|
|
|
|
### Traefik RBAC Update
|
|
|
|
In v3, the support of `TCPServersTransport` has been introduced.
|
|
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.
|
|
|
|
### Content-Type Auto-Detection
|
|
|
|
In v3, the `Content-Type` header is not auto-detected anymore when it is not set by the backend.
|
|
One should use the `ContentType` middleware to enable the `Content-Type` header value auto-detection.
|
|
|
|
### Observability
|
|
|
|
#### gRPC Metrics
|
|
|
|
In v3, the reported status code for gRPC requests is now the value of the `Grpc-Status` header.
|
|
|
|
#### Tracing
|
|
|
|
In v3, the tracing feature has been revamped and is now powered exclusively by [OpenTelemetry](https://opentelemetry.io/ "Link to website of OTel") (OTel).
|
|
!!! warning "Important"
|
|
|
|
Traefik v3 **no** longer supports direct output formats for specific vendors such as Instana, Jaeger, Zipkin, Haystack, Datadog, and Elastic.
|
|
Instead, it focuses on pure OpenTelemetry implementation, providing a unified and standardized approach for observability.
|
|
|
|
Here are two possible transition strategies:
|
|
|
|
1. OTLP Ingestion Endpoints:
|
|
|
|
Most vendors now offer OpenTelemetry Protocol (OTLP) ingestion endpoints.
|
|
You can seamlessly integrate Traefik v3 with these endpoints to continue leveraging tracing capabilities.
|
|
|
|
2. Legacy Stack Compatibility:
|
|
|
|
For legacy stacks that cannot immediately upgrade to the latest vendor agents supporting OTLP ingestion,
|
|
using OpenTelemetry (OTel) collectors with appropriate exporters configuration is a viable solution.
|
|
This allows continued compatibility with the existing infrastructure.
|
|
|
|
Please check the [OpenTelemetry Tracing provider documention](../observability/tracing/opentelemetry.md) for more information.
|
|
|
|
#### Internal Resources Observability (AccessLogs, Metrics and Tracing)
|
|
|
|
In v3, observability for internal routers or services (e.g.: `ping@internal`) is disabled by default.
|
|
To enable it one should use the new `addInternals` option for AccessLogs, Metrics or Tracing.
|
|
Please take a look at the observability documentation for more information:
|
|
|
|
- [AccessLogs](../observability/access-logs.md#addinternals)
|
|
- [Metrics](../observability/metrics/overview.md#addinternals)
|
|
- [AccessLogs](../observability/tracing/overview.md#addinternals)
|