7.8 KiB
Traefik & File
Good Old Configuration File {: .subtitle }
The file provider lets you define the dynamic configuration in a TOML or YAML file. You can write one of these mutually exclusive configuration elements:
!!! info The file provider is the default format used throughout the documentation to show samples of the configuration for many features.
!!! tip The file provider can be a good location for common elements you'd like to re-use from other providers; e.g. declaring whitelist middlewares, basic authentication, ...
Configuration Examples
??? example "Declaring Routers, Middlewares & Services"
Enabling the file provider:
```toml tab="File (TOML)"
[providers.file]
directory = "/path/to/dynamic/conf"
```
```yaml tab="File (YAML)"
providers:
file:
directory: "/path/to/dynamic/conf"
```
```bash tab="CLI"
--providers.file.directory=/path/to/dynamic/conf
```
Declaring Routers, Middlewares & Services:
```toml tab="TOML"
[http]
# Add the router
[http.routers]
[http.routers.router0]
entryPoints = ["web"]
middlewares = ["my-basic-auth"]
service = "service-foo"
rule = "Path(`/foo`)"
# Add the middleware
[http.middlewares]
[http.middlewares.my-basic-auth.basicAuth]
users = ["test:$apr1$H6uskkkW$IgXLP6ewTrSuBkTrqE8wj/",
"test2:$apr1$d9hr9HBB$4HxwgUir3HP4EsggP/QNo0"]
usersFile = "etc/traefik/.htpasswd"
# Add the service
[http.services]
[http.services.service-foo]
[http.services.service-foo.loadBalancer]
[[http.services.service-foo.loadBalancer.servers]]
url = "http://foo/"
[[http.services.service-foo.loadBalancer.servers]]
url = "http://bar/"
```
```yaml tab="YAML"
http:
# Add the router
routers:
router0:
entryPoints:
- web
middlewares:
- my-basic-auth
service: service-foo
rule: Path(`/foo`)
# Add the middleware
middlewares:
my-basic-auth:
basicAuth:
users:
- test:$apr1$H6uskkkW$IgXLP6ewTrSuBkTrqE8wj/
- test2:$apr1$d9hr9HBB$4HxwgUir3HP4EsggP/QNo0
usersFile: etc/traefik/.htpasswd
# Add the service
services:
service-foo:
loadBalancer:
servers:
- url: http://foo/
- url: http://bar/
passHostHeader: false
```
Provider Configuration
If you're in a hurry, maybe you'd rather go through the dynamic configuration references and the static configuration.
!!! warning "Limitations"
With the file provider, Traefik listens for file system notifications to update the dynamic configuration.
If you use a mounted/bound file system in your orchestrator (like docker or kubernetes), the way the files are linked may be a source of errors.
If the link between the file systems is broken, when a source file/directory is changed/renamed, nothing will be reported to the linked file/directory, so the file system notifications will be neither triggered nor caught.
For example, in docker, if the host file is renamed, the link to the mounted file will be broken and the container's file will not be updated.
To avoid this kind of issue, a good practice is to:
* set the Traefik [**directory**](#directory) configuration with the parent directory
* mount/bind the parent directory
As it is very difficult to listen to all file system notifications, Traefik use [fsnotify](https://github.com/fsnotify/fsnotify).
If using a directory with a mounted directory does not fix your issue, please check your file system compatibility with fsnotify.
filename
Defines the path to the configuration file.
!!! warning ""
filename and directory are mutually exclusive.
The recommendation is to use directory.
[providers]
[providers.file]
filename = "/path/to/config/dynamic_conf.toml"
providers:
file:
filename: /path/to/config/dynamic_conf.yml
--providers.file.filename=/path/to/config/dynamic_conf.toml
directory
Defines the path to the directory that contains the configuration files.
!!! warning ""
filename and directory are mutually exclusive.
The recommendation is to use directory.
[providers]
[providers.file]
directory = "/path/to/config"
providers:
file:
directory: /path/to/config
--providers.file.directory=/path/to/config
watch
Set the watch option to true to allow Traefik to automatically watch for file changes.
It works with both the filename and the directory options.
[providers]
[providers.file]
directory = "/path/to/dynamic/conf"
watch = true
providers:
file:
directory: /path/to/dynamic/conf
watch: true
--providers.file.directory=/my/path/to/dynamic/conf
--providers.file.watch=true
Go Templating
!!! warning Go Templating only works with dedicated dynamic configuration files. Templating does not work in the Traefik main static configuration file.
Traefik supports using Go templating to automatically generate repetitive portions of configuration files. These sections must be valid Go templates, augmented with the Sprig template functions.
To illustrate, it's possible to easily define multiple routers, services, and TLS certificates as described in the following examples:
??? example "Configuring Using Templating"
```toml tab="TOML"
# template-rules.toml
[http]
[http.routers]
{{ range $i, $e := until 100 }}
[http.routers.router{{ $e }}-{{ env "MY_ENV_VAR" }}]
# ...
{{ end }}
[http.services]
{{ range $i, $e := until 100 }}
[http.services.service{{ $e }}]
# ...
{{ end }}
[tcp]
[tcp.routers]
{{ range $i, $e := until 100 }}
[tcp.routers.router{{ $e }}]
# ...
{{ end }}
[tcp.services]
{{ range $i, $e := until 100 }}
[http.services.service{{ $e }}]
# ...
{{ end }}
{{ range $i, $e := until 10 }}
[[tls.certificates]]
certFile = "/etc/traefik/cert-{{ $e }}.pem"
keyFile = "/etc/traefik/cert-{{ $e }}.key"
stores = ["my-store-foo-{{ $e }}", "my-store-bar-{{ $e }}"]
{{ end }}
[tls.config]
{{ range $i, $e := until 10 }}
[tls.config.TLS{{ $e }}]
# ...
{{ end }}
```
```yaml tab="YAML"
http:
routers:
{{range $i, $e := until 100 }}
router{{ $e }}-{{ env "MY_ENV_VAR" }}:
# ...
{{end}}
services:
{{range $i, $e := until 100 }}
application{{ $e }}:
# ...
{{end}}
tcp:
routers:
{{range $i, $e := until 100 }}
router{{ $e }}:
# ...
{{end}}
services:
{{range $i, $e := until 100 }}
service{{ $e }}:
# ...
{{end}}
tls:
certificates:
{{ range $i, $e := until 10 }}
- certFile: "/etc/traefik/cert-{{ $e }}.pem"
keyFile: "/etc/traefik/cert-{{ $e }}.key"
store:
- "my-store-foo-{{ $e }}"
- "my-store-bar-{{ $e }}"
{{end}}
```