traefik/docs/user-guide/examples.md

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# Examples
You will find here some configuration examples of Træfik.
## HTTP only
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```toml
defaultEntryPoints = ["http"]
[entryPoints]
[entryPoints.http]
address = ":80"
```
## HTTP + HTTPS (with SNI)
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```toml
defaultEntryPoints = ["http", "https"]
[entryPoints]
[entryPoints.http]
address = ":80"
[entryPoints.https]
address = ":443"
[entryPoints.https.tls]
[[entryPoints.https.tls.certificates]]
CertFile = "integration/fixtures/https/snitest.com.cert"
KeyFile = "integration/fixtures/https/snitest.com.key"
[[entryPoints.https.tls.certificates]]
CertFile = "integration/fixtures/https/snitest.org.cert"
KeyFile = "integration/fixtures/https/snitest.org.key"
```
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Note that we can either give path to certificate file or directly the file content itself ([like in this TOML example](/user-guide/kv-config/#upload-the-configuration-in-the-key-value-store)).
## HTTP redirect on HTTPS
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```toml
defaultEntryPoints = ["http", "https"]
[entryPoints]
[entryPoints.http]
address = ":80"
[entryPoints.http.redirect]
entryPoint = "https"
[entryPoints.https]
address = ":443"
[entryPoints.https.tls]
[[entryPoints.https.tls.certificates]]
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CertFile = "examples/traefik.crt"
KeyFile = "examples/traefik.key"
```
## Let's Encrypt support
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### Basic example
```toml
[entryPoints]
[entryPoints.https]
address = ":443"
[entryPoints.https.tls]
[acme]
email = "test@traefik.io"
storage = "acme.json"
caServer = "http://172.18.0.1:4000/directory"
entryPoint = "https"
[[acme.domains]]
main = "local1.com"
sans = ["test1.local1.com", "test2.local1.com"]
[[acme.domains]]
main = "local2.com"
sans = ["test1.local2.com", "test2x.local2.com"]
[[acme.domains]]
main = "local3.com"
[[acme.domains]]
main = "local4.com"
```
This configuration allows generating Let's Encrypt certificates for the four domains `local[1-4].com` with described SANs.
Traefik generates these certificates when it starts and it needs to be restart if new domains are added.
### OnHostRule option
```toml
[entryPoints]
[entryPoints.https]
address = ":443"
[entryPoints.https.tls]
[acme]
email = "test@traefik.io"
storage = "acme.json"
onHostRule = true
caServer = "http://172.18.0.1:4000/directory"
entryPoint = "https"
[[acme.domains]]
main = "local1.com"
sans = ["test1.local1.com", "test2.local1.com"]
[[acme.domains]]
main = "local2.com"
sans = ["test1.local2.com", "test2x.local2.com"]
[[acme.domains]]
main = "local3.com"
[[acme.domains]]
main = "local4.com"
```
This configuration allows generating Let's Encrypt certificates for the four domains `local[1-4].com`.
Traefik generates these certificates when it starts.
If a backend is added with a `onHost` rule, Traefik will automatically generate the Let's Encrypt certificate for the new domain.
### OnDemand option
```toml
[entryPoints]
[entryPoints.https]
address = ":443"
[entryPoints.https.tls]
[acme]
email = "test@traefik.io"
storage = "acme.json"
OnDemand = true
caServer = "http://172.18.0.1:4000/directory"
entryPoint = "https"
```
This configuration allows generating a Let's Encrypt certificate during the first HTTPS request on a new domain.
**Note** : This option simplifies the configuration but :
* TLS handshakes will be slow when requesting a hostname certificate for the first time, this can leads to DDoS attacks.
* Let's Encrypt have rate limiting: https://letsencrypt.org/docs/rate-limits
That's why, it's better to use the `onHostRule` optin if possible.
### DNS challenge
```toml
[entryPoints]
[entryPoints.https]
address = ":443"
[entryPoints.https.tls]
[acme]
email = "test@traefik.io"
storage = "acme.json"
dnsProvider = "digitalocean" # DNS Provider name (cloudflare, OVH, gandi...)
delayDontCheckDNS = 0
caServer = "http://172.18.0.1:4000/directory"
entryPoint = "https"
[[acme.domains]]
main = "local1.com"
sans = ["test1.local1.com", "test2.local1.com"]
[[acme.domains]]
main = "local2.com"
sans = ["test1.local2.com", "test2x.local2.com"]
[[acme.domains]]
main = "local3.com"
[[acme.domains]]
main = "local4.com"
```
DNS challenge needs environment variables to be executed. This variables have to be set on the machine/container which host Traefik.
These variables has described [in this section](toml/#acme-lets-encrypt-configuration).
### OnHostRule option and provided certificates
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```toml
[entryPoints]
[entryPoints.https]
address = ":443"
[entryPoints.https.tls]
[[entryPoints.https.tls.certificates]]
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CertFile = "examples/traefik.crt"
KeyFile = "examples/traefik.key"
[acme]
email = "test@traefik.io"
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storage = "acme.json"
onHostRule = true
caServer = "http://172.18.0.1:4000/directory"
entryPoint = "https"
```
Traefik will only try to generate a Let's encrypt certificate if the domain cannot be checked by the provided certificates.
### Cluster mode
#### Prerequisites
Before to use Let's Encrypt in a Traefik cluster, take a look to [the key-value store explanations](/user-guide/kv-config) and more precisely to [this section](/user-guide/kv-config/#store-configuration-in-key-value-store) in the way to know how to migrate from a acme local storage *(acme.json file)* to a key-value store configuration.
#### Configuration
```toml
[entryPoints]
[entryPoints.https]
address = ":443"
[entryPoints.https.tls]
[acme]
email = "test@traefik.io"
storage = "traefik/acme/account"
caServer = "http://172.18.0.1:4000/directory"
entryPoint = "https"
[[acme.domains]]
main = "local1.com"
sans = ["test1.local1.com", "test2.local1.com"]
[[acme.domains]]
main = "local2.com"
sans = ["test1.local2.com", "test2x.local2.com"]
[[acme.domains]]
main = "local3.com"
[[acme.domains]]
main = "local4.com"
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[consul]
endpoint = "127.0.0.1:8500"
watch = true
prefix = "traefik"
```
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This configuration allows to use the key `traefik/acme/account` to get/set Let's Encrypt certificates content.
The `consul` provider contains the configuration.
**Note** : It's possible to use others key-value store providers as described [here](/user-guide/kv-config/#key-value-store-configuration).
## Override entrypoints in frontends
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```toml
[frontends]
[frontends.frontend1]
backend = "backend2"
[frontends.frontend1.routes.test_1]
rule = "Host:test.localhost"
[frontends.frontend2]
backend = "backend1"
passHostHeader = true
passTLSCert = true
entrypoints = ["https"] # overrides defaultEntryPoints
[frontends.frontend2.routes.test_1]
rule = "Host:{subdomain:[a-z]+}.localhost"
[frontends.frontend3]
entrypoints = ["http", "https"] # overrides defaultEntryPoints
backend = "backend2"
rule = "Path:/test"
```
## Enable Basic authentication in an entrypoint
With two user/pass:
- `test`:`test`
- `test2`:`test2`
Passwords are encoded in MD5: you can use htpasswd to generate those ones.
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```toml
defaultEntryPoints = ["http"]
[entryPoints]
[entryPoints.http]
address = ":80"
[entryPoints.http.auth.basic]
users = ["test:$apr1$H6uskkkW$IgXLP6ewTrSuBkTrqE8wj/", "test2:$apr1$d9hr9HBB$4HxwgUir3HP4EsggP/QNo0"]
```
## Pass Authenticated user to application via headers
Providing an authentication method as described above, it is possible to pass the user to the application
via a configurable header value
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```toml
defaultEntryPoints = ["http"]
[entryPoints]
[entryPoints.http]
address = ":80"
[entryPoints.http.auth]
headerField = "X-WebAuth-User"
[entryPoints.http.auth.basic]
users = ["test:$apr1$H6uskkkW$IgXLP6ewTrSuBkTrqE8wj/", "test2:$apr1$d9hr9HBB$4HxwgUir3HP4EsggP/QNo0"]
```
## Override the Traefik HTTP server IdleTimeout and/or throttle configurations from re-loading too quickly
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```toml
IdleTimeout = "360s"
ProvidersThrottleDuration = "5s"
```