# Bad Gateway error **URL:** \ **Category:** Traefik v2\ **Tags:** docker-swarm\ **Created:** [August 10, 2023, 2:54pm UTC](https://community.traefik.io/t/bad-gateway-error/19481 "2023-08-10T14:54:03Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![thiarerobert](https://sea2.discourse-cdn.com/flex020/user_avatar/community.traefik.io/thiarerobert/32/7438_2.png) [@thiarerobert](https://community.traefik.io/u/thiarerobert)\ **Post date:** [August 10, 2023, 2:54pm UTC](https://community.traefik.io/t/bad-gateway-error/19481/1 "2023-08-10T14:54:03Z")
Hello, I am configuring traefik to access my api in https. I have the impression that it works since I don't see any errors in the logs and I can access my whoami in https too. But every time I use my front-end url ([https://dspace.localhost](https://dspace.localhost)), I get a Bad Gateway error. here are the contents of my traefik.yml file: ```auto version: "3.9" services: traefik: image: "traefik:v2.9.6" container_name: "traefik" command: - "--entrypoints.http.address=:80" - "--entrypoints.https.address=:443" - "--entrypoints.postgres.address=:5432" - "--api.insecure=true" - "--api.dashboard=true" - "--providers.docker=true" - "--providers.docker.swarmmode=true" - "--providers.docker.network=traefik-net" - "--providers.docker.exposedbydefault=false" - "--providers.file.filename=/configuration/certificate.yml" - "--providers.file.watch=true" ports: - "80:80" - "8888:8080" - "443:443" volumes: - "/var/run/docker.sock:/var/run/docker.sock:ro" - "/C/opt/Savoirs_udes_project/DSpace7/volumes/configuration/:/configuration/" whoami: image: "traefik/whoami" deploy: labels: - "traefik.enable=true" - "traefik.http.routers.whoami.rule=Host(`whoami.localhost`)" - "traefik.http.routers.whoami.entrypoints=https" - "traefik.http.services.whoami.loadbalancer.server.port=80" - "traefik.http.routers.whoami.tls=true" networks: - traefik-net networks: traefik-net: driver: overlay external: true dspace: driver: overlay external: true ``` * * * certificate.yml: ```auto tls: certificates: certFile = "/C/opt/Savoirs_udes_project/DSpace7/volumes/tls/local-cert.crt" keyFile = "/C/opt/Savoirs_udes_project/dSpace7/volumes/tls/local-key.key" ``` * * * my\_front-end.yml: ```auto version: '3.9' networks: dspace: driver: overlay external: true traefik-net: driver: overlay external: true services: dspace-angular: environment: DSPACE_UI_SSL: 'true' DSPACE_UI_HOST: dspace.localhost DSPACE_UI_PORT: '4000' DSPACE_UI_NAMESPACE: / DSPACE_REST_SSL: 'true' DSPACE_REST_HOST: dspace-api.localhost DSPACE_REST_PORT: 443 DSPACE_REST_NAMESPACE: /server NODE_OPTIONS: "--max-old-space-size=5120" image: thir2608/savoirs_front:latest build: context: .. dockerfile: Dockerfile networks: - dspace - traefik-net deploy: labels: - "traefik.enable=true" - "traefik.http.routers.dspace-angular.entrypoints=https" - "traefik.http.routers.dspace-angular.rule=Host(`dspace.localhost`)" - "traefik.http.routers.dspace-angular.service=dspace-angular" - "traefik.http.services.dspace-angular.loadbalancer.server.port=4000" - "traefik.http.routers.dspace-angular.tls=true" ``` Thanks for your help. ---
**Author:** ![bluepuma77](https://avatars.discourse-cdn.com/v4/letter/b/a9adbd/32.png) [@bluepuma77](https://community.traefik.io/u/bluepuma77)\ **Post date:** [August 10, 2023, 9:03pm UTC](https://community.traefik.io/t/bad-gateway-error/19481/2 "2023-08-10T21:03:19Z")
The usual reason for "bad gateway" is the use of multiple networks, but you do define the one to use. Two things I noticed: 1. This feels strange: `image` and `build` at the same time > [@thiarerobert](#): > > ```auto > image: thir2608/savoirs_front:latest > build: > context: .. > dockerfile: Dockerfile > > ``` 1. This feels strange: `driver` and `overlay` at the same time > [@thiarerobert](#): > > ```auto > traefik-net: > driver: overlay > external: true > > ``` ---
**Author:** ![thiarerobert](https://sea2.discourse-cdn.com/flex020/user_avatar/community.traefik.io/thiarerobert/32/7438_2.png) [@thiarerobert](https://community.traefik.io/u/thiarerobert)\ **Post date:** [August 11, 2023, 2:30pm UTC](https://community.traefik.io/t/bad-gateway-error/19481/3 "2023-08-11T14:30:25Z")
Thank you for your reply. You're right about me using image and build in my docker-compose, in fact I was inspired by an existing docker-compose file. For the network, I use traefik-net and I removed external:true but the error still persists. What's strange is that my front-end and back-end have almost the same tls configuration, yet I can access the api in https. ---
**Author:** ![bluepuma77](https://avatars.discourse-cdn.com/v4/letter/b/a9adbd/32.png) [@bluepuma77](https://community.traefik.io/u/bluepuma77)\ **Post date:** [August 11, 2023, 9:02pm UTC](https://community.traefik.io/t/bad-gateway-error/19481/4 "2023-08-11T21:02:17Z")
You need to use a common Docker network. By itself compose creates an isolated network per file. So you either need to create one manually in CLI and use `external` in both compose files or you create it in one compose file with `attachable: true` and `name:` and in the other one use `external: true`. ---
**Author:** ![thiarerobert](https://sea2.discourse-cdn.com/flex020/user_avatar/community.traefik.io/thiarerobert/32/7438_2.png) [@thiarerobert](https://community.traefik.io/u/thiarerobert)\ **Post date:** [August 15, 2023, 6:27pm UTC](https://community.traefik.io/t/bad-gateway-error/19481/5 "2023-08-15T18:27:37Z")
Yes, I saw that my service was connecting to a different network than traefik. So I manually created my network. Thanks for your help. ---
**Author:** ![system](https://us1.discourse-cdn.com/flex020/uploads/containo/original/2X/b/bd81ebdb578656e76e56ff3cc3eed021d3ba132d.png) [@system](https://community.traefik.io/u/system)\ **Post date:** [August 18, 2023, 6:27pm UTC](https://community.traefik.io/t/bad-gateway-error/19481/6 "2023-08-18T18:27:57Z")
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