swarmModeRefreshSeconds

Traefik Traefik v2
1

Hi,

today, traefik stopped working, with the error traefik error: field not found, node: swarmModeRefreshSeconds

I do not use swarm, but I do have that option in traefik.yml

What should I do?

version: '3'
services:
  traefik:
    container_name: traefik
    image: traefik:latest
    ports:
      - 80:80
      - 443:443
#      - 8383:8080 # Dashboard port
    volumes:
#      - /var/run/docker.sock:/var/run/docker.sock:ro
      - /volume1/docker/security/traefik/:/etc/traefik/
      - /var/log/crowdsec/:/var/log/crowdsec/
      - /volume1/docker/security/traefik/plugins:/plugins-local
#    networks:
#      - proxy # rename this to your custom docker network
    networks: 
       macvlan_nas:
        ipv4_address: 192.168.1.6
       lan-traefik:
    labels:
      traefik.http.routers.api.rule: Host(`traefik.xxxx.duckdns.org`)    # Define the subdomain for the traefik dashboard.
      traefik.http.routers.api.entryPoints: https    # Set the Traefik entry point.
      traefik.http.routers.api.service: api@internal    # Enable Traefik API.
      traefik.http.services.dummy.loadBalancer.server.port: 65535
#      traefik.http.routers.traefik.middlewares: local-ipwhitelist@file
      traefik.http.routers.api.middlewares: dashboard-ipwhitelist
      traefik.http.middlewares.dashboard-ipwhitelist.ipWhiteList.sourceRange: "127.0.0.1/32,192.168.1.0/24"
#      traefik.http.routers.traefik-secure.middlewares: local-ipwhitelist
      traefik.enable: true   # Enable Traefik reverse proxy for the Traefik dashboard.
    environment:
      DOCKER_HOST: dockersocket
      DUCKDNS_TOKEN: token
    restart: unless-stopped
    depends_on:
      - dockersocket

Thanks!

2

Share Traefik static config file traefik.yml.

traefik:latest Docker image was probably changed from v2 to v3 (tags).

3 
global:
  checkNewVersion: true
  sendAnonymousUsage: false

serversTransport:
  insecureSkipVerify: true

entryPoints:
  # Not used in apps, but redirect everything from HTTP to HTTPS
  http:
    address: :80
#    forwardedHeaders:
#      trustedIPs: &trustedIps
#        # Start of Clouflare public IP list for HTTP requests, remove this if you don't use it
#        - 173.245.48.0/20
#        - 103.21.244.0/22
#        - 103.22.200.0/22
#        - 103.31.4.0/22
#        - 141.101.64.0/18
#        - 108.162.192.0/18
#        - 190.93.240.0/20
#        - 188.114.96.0/20
#        - 197.234.240.0/22
#        - 198.41.128.0/17
#        - 162.158.0.0/15
#        - 104.16.0.0/12
#       - 172.64.0.0/13
#        - 131.0.72.0/22
#        - 2400:cb00::/32
#        - 2606:4700::/32
#        - 2803:f800::/32
#        - 2405:b500::/32
#        - 2405:8100::/32
#        - 2a06:98c0::/29
#        - 2c0f:f248::/32
#        # End of Cloudlare public IP list
    http:
      redirections:
        entryPoint:
          to: https
          scheme: https

  # HTTPS endpoint, with domain wildcard
  https:
    address: :443
#    forwardedHeaders:
      # Reuse list of Cloudflare Trusted IP's above for HTTPS requests
#      trustedIPs: *trustedIps
    http:
      tls:
        # Generate a wildcard domain certificate
        certResolver: letsencrypt
        domains:
          - main: xxxx.duckdns.org
            sans:
              - '*.xxxx.duckdns.org'
      middlewares:
        - securityHeaders@file
        - crowdsec-bouncer@file

providers:
  providersThrottleDuration: 2s

  # File provider for connecting things that are outside of docker / defining middleware
  file:
    filename: /etc/traefik/fileConfig.yml
    watch: true

  # Docker provider for connecting all apps that are inside of the docker network
  docker:
    watch: true
    network: macvlan_nas # Add Your Docker Network Name Here
    # Default host rule to containername.domain.example
    defaultRule: "Host(`{{ index .Labels \"com.docker.compose.service\"}}.xxxx.duckdns.org`)"
    swarmModeRefreshSeconds: 15s
    exposedByDefault: false
    endpoint: "tcp://dockersocket:2375" # Uncomment if you are using docker socket proxy

# Enable traefik ui
api:
  dashboard: true
  insecure: true

# Log level INFO|DEBUG|ERROR
log:
  level: DEBUG

# Use letsencrypt to generate ssl serficiates
certificatesResolvers:
  letsencrypt:
    acme:
      email: xxxx@gmail.com
      storage: /etc/traefik/acme.json
      dnsChallenge:
        provider: duckdns
        # Used to make sure the dns challenge is propagated to the rights dns servers
        resolvers:
          - "192.168.1.172:53"

accessLog:
  filePath: "/var/log/crowdsec/traefik.log" 
  bufferingSize: 50

experimental:
  plugins:
    geoblock:
      moduleName: github.com/nscuro/traefik-plugin-geoblock
      version: v0.14.0
4

HI, find this line

swarmModeRefreshSeconds: 15s

and comment it out.

This worked for me (not sure what impact it might have later!)
John DF

5

Working, thanks. I assume nothing will happen if we do not use swarm

6

Guys, read the website: Traefik V3 Migration Documentation - Traefik

Docker image has moved to Traefik v3, so there are migration changes required.

'In v3, the provider Docker has been split into 2 providers:

Docker provider (without Swarm support)
Swarm provider (Swarm support only)'

'In v3, the swarmMode should not be used with the Docker provider, and, to use Swarm, the Swarm provider should be used instead'

Read the linked page above for config file changes. Commenting out those lines will be fine.

7

Thanks. I’ll need to read up a bit more … instead of automatically updating. RTFM :grin:

8

Traefik has versioning according to semver:

Major.Minor.Patch

Major versions usually include breaking changes.

When using Docker, an image with tag like traefik:v2 will usually keep you updated for a while without breaking changes. Note that you need to pull for updates.

At some point the old major release will not be maintained anymore (bug & security fixes), so you need to update to next major version (in a controlled manner).