What did you do?
I apologize in advance if I make any mistake creating this issue, this is my first one on github,I'll try to be concise.
I configured the dashboard and api routers using a dynamic file, setting a rule that uses an environmental variable (DOMAIN_NAME) as so:
[http]
[http.routers]
[http.routers.dashboard]
middlewares = ["dashboard_redirect", "dashboard_stripprefix"]
service = "dashboard@internal"
rule = "Host(`traefik.{{env "DOMAIN_NAME"}}`) && PathPrefix(`/`)"
priority = 1000
[http.routers.api]
service = "api@internal"
rule = "Host(`traefik.{{env "DOMAIN_NAME"}}`) && PathPrefix(`/api`)"
priority = 1001
[http.middlewares]
[http.middlewares.dashboard_redirect.redirectRegex]
regex = "^(http:\\/\\/(\\[[\\w:.]+\\]|[\\w\\._-]+)(:\\d+)?)\\/$"
replacement = "${1}/dashboard/"
permanent = true
[http.middlewares.dashboard_stripprefix.stripPrefix]
prefixes = ["/dashboard/", "/dashboard"]
the issue is the accepted syntax is the one above which isn't the right syntax for a toml file, I think the quotes encapsulating DOMAIN_NAME should be escaped with a \
What did you see instead?
using escaped auotes triggers an error where traefik can't seem to accept the syntax, this is the error:
ERR github.com/traefik/traefik//v3/pkg/provider/file/file.go:150 > Error occurred during watcher callback error="/dynamic/api.toml: template: :6: unexpected \"\\\\\" in operand" providerName=file
but using the escaped quotes in the static file seems to work fine, for example this is my providers configuration in a toml static file:
[providers]
[providers.docker]
exposedByDefault = false
defaultRule = "Host(`{{ .ContainerName }}.{{env \"DOMAIN_NAME\"}}`)"
[providers.file]
directory = "/dynamic"
watch = true
What version of Traefik are you using?
Version: 3.1.2
Codename: comte
Go version: go1.22.5
Built: 2024-08-06T13:37:51Z
OS/Arch: linux/amd64
What is your environment & configuration?
Platform: Debian 12.6.0
Container Manage: Podman
traefik.toml:
################################################################
# Global configuration
################################################################
[global]
checkNewVersion = true
sendAnonymousUsage = false
################################################################
# Entrypoints configuration
################################################################
[entryPoints]
[entryPoints.web]
address = ":80"
[entryPoints.web.http]
[entryPoints.web.http.redirections]
[entryPoints.web.http.redirections.entryPoint]
to = "websecure"
scheme = "https"
[entryPoints.websecure]
address = ":443"
asDefault = true
[entryPoints.websecure.http]
[entryPoints.websecure.http.tls]
certResolver = "letsencrypt"
################################################################
# Traefik logs configuration
################################################################
[log]
level = "DEBUG"
################################################################
# API and dashboard configuration
################################################################
[api]
insecure = false
dashboard = true
################################################################
# Ping configuration
################################################################
[ping]
################################################################
# Docker configuration backend
################################################################
[providers]
[providers.docker]
exposedByDefault = false
defaultRule = "Host(`{{ .ContainerName }}.{{env \"DOMAIN_NAME\"}}`)"
[providers.file]
directory = "/dynamic"
watch = true
################################################################
# Let's Encrypt
################################################################
[certificatesresolvers.letsencrypt.acme]
email = "fluky@bdi.brr"
storage = "/letsencrypt/acme.json"
preferredchain="ISRG Root X1"
keytype="RSA4096"
[certificatesResolvers.letsencrypt.acme.tlsChallenge]
dynamic file:
[http]
[http.routers]
[http.routers.dashboard]
middlewares = ["dashboard_redirect", "dashboard_stripprefix"]
service = "dashboard@internal"
rule = "Host(`traefik.{{env "DOMAIN_NAME"}}`) && PathPrefix(`/`)"
priority = 1000
[http.routers.api]
service = "api@internal"
rule = "Host(`traefik.{{env "DOMAIN_NAME"}}`) && PathPrefix(`/api`)"
priority = 1001
[http.middlewares]
[http.middlewares.dashboard_redirect.redirectRegex]
regex = "^(http:\\/\\/(\\[[\\w:.]+\\]|[\\w\\._-]+)(:\\d+)?)\\/$"
replacement = "${1}/dashboard/"
permanent = true
[http.middlewares.dashboard_stripprefix.stripPrefix]
prefixes = ["/dashboard/", "/dashboard"]
compose.yml:
services:
traefik:
image: "docker.io/traefik:v3.1"
container_name: "traefik"
ports:
- "8080:80"
- "8443:443"
env_file:
-.traefik.env
volumes:
- "/run/user/%U/podman/podman.sock:/var/run/docker.sock:ro"
- "/%h/letsencrypt:/letsencrypt"
- "/%h/traefik/traefik.toml:/etc/traefik/traefik.toml"
- "/%h/traefik/dynamic:/dynamic"
healthcheck:
test: ["CMD", "traefik", "healthcheck", "--ping"]
interval: 10s
timeout: 5s
retries: 3
start_period: 10s
whoami:
image: "docker.io/traefik/whoami"
container_name: "whoami"
labels:
- "traefik.enable=true"
I posted this as github issue but I was told that it looks like a configuration issue on my side, even tho the configuration I gave works, so I don't have a problem making it work in the case of dynamic files but when it comes to static file it accepts the right syntax, it's just I noticed that the go file (file.go line 150) accepts a wrong syntax for a toml file referencing an env variable using a go template (unless i'm mistaken). So I was advised to come here and ask help from the community.
