Traefik: Level=error msg=“field not found, node: mywebsite” providerName=docker

I was finally able to resolve it after some hours of working with my Line Manager.

The issue was that I defined port 3008 in the Nginx default.conf file and then defined port 3004 in the Gatsby application's docker-compose.yml file. This did not allow traffic into the application from Traefik reverse proxy. since both ports were different.

Solution 1:

Simply defining the same port of 3008 in the Nginx default.conf and in the Gatsby application's docker-compose.yml file fixed it:

Nginx's defualt.conf

server {  listen 3008;  add_header Cache-Control no-cache;  location / {    root   /usr/share/nginx/html;    index  index.html index.htm;    try_files $uri $uri/ /index.html;    expires -1;  }  error_page   500 502 503 504  /50x.html;  location = /50x.html {    root   /usr/share/nginx/html;  }}

Gatsby application's docker-compose.yml

version: "3"services:  web:    image: my-website    build:      context: .      dockerfile: Dockerfile    expose:      - "3004"    labels:      - traefik.enable=true      - traefik.http.routers.mywebsite.rule=Host(`mywebsite.com`)      - traefik.http.services.educollectwebsite.loadbalancer.server.port=3008    restart: always    volumes:      - .:/appnetworks:  default:    external:      name: traefik-proxy

Solution 2:

Defining the default port in Traefik which is port 80 in the Nginx default.conf and in the Gatsby application's docker-compose.yml file fixed it. This is more preferable when deploying static applications since it helps me to assume a reasonable default for the application.

Nginx's defualt.conf

server {  listen 80;  add_header Cache-Control no-cache;  location / {    root   /usr/share/nginx/html;    index  index.html index.htm;    try_files $uri $uri/ /index.html;    expires -1;  }  error_page   500 502 503 504  /50x.html;  location = /50x.html {    root   /usr/share/nginx/html;  }}

Gatsby application's docker-compose.yml

version: "3"services:  web:    image: my-website    build:      context: .      dockerfile: Dockerfile    expose:      - "80"    labels:      - traefik.enable=true      - traefik.http.routers.mywebsite.rule=Host(`mywebsite.com`)    restart: always    volumes:      - .:/appnetworks:  default:    external:      name: traefik-proxy

Note: Using the same port with Traefik which is port 80 in the application, invalidates the need for a Traefik loadbalancer service.

- traefik.http.services.educollectwebsite.loadbalancer.server.port=80

That's all.

I hope this helps