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Question

I am very new both to Keycloak and Nginx. I am trying to deploy Keycloak as a route on my website under /keycloak. However, I am getting an error of 502 bad gateway.

My nginx configuration is the following (I replaced the name of my actual website with mywebsite).

Setup

server {
    server_name mywebsite.com www.mywebsite.com;

    location /.well-known/acme-challenge/ {
        root /var/www/letsencrypt;
    }

    location / {
        root /var/www/mywebsite/cba-frontend/dist;
        try_files $uri $uri/ /index.html;
    }

    location /keycloak/ {  
        proxy_pass http://localhost:8080; 
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_set_header X-Forwarded-Prefix /keycloak;
    }

    listen 443 ssl; # managed by Certbot
    ssl_certificate /etc/letsencrypt/live/mywebsite.com/fullchain.pem; # managed by Certbot
    ssl_certificate_key /etc/letsencrypt/live/mywebsite.com/privkey.pem; # managed by Certbot
    include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot
}

server {
    if ($host = www.mywebsite.com) {
        return 301 https://$host$request_uri;
    } # managed by Certbot

    if ($host = mywebsite.com) {
        return 301 https://$host$request_uri;
    } # managed by Certbot

    listen 80;
    server_name mywebsite.com www.mywebsite.com;
    return 404; # managed by Certbot
}

Then, I created a docker file to Keycloak:

FROM quay.io/keycloak/keycloak:latest as builder

ENV KC_HEALTH_ENABLED=true
ENV KC_METRICS_ENABLED=true
ENV KC_FEATURES=token-exchange

RUN /opt/keycloak/bin/kc.sh build

FROM quay.io/keycloak/keycloak:latest
COPY --from=builder /opt/keycloak/ /opt/keycloak/
WORKDIR /opt/keycloak

ENV KC_HOSTNAME=mywebsite.com
ENV KC_PROXY=edge
ENV KC_HTTP_RELATIVE_PATH=/keycloak

ENTRYPOINT ["/opt/keycloak/bin/kc.sh", "start"]

Lastly, I have a docker compose file to put this all together

version: '3.8'

services:
  keycloak:
    build:
      context: .
      dockerfile: Dockerfile
    container_name: custom-keycloak
    environment:
      - KEYCLOAK_ADMIN=admin
      - KEYCLOAK_ADMIN_PASSWORD=admin
      - KC_HOSTNAME=mywebsite.com
      - KC_PROXY=edge
      - KC_HTTP_RELATIVE_PATH=/keycloak
    volumes:
      - keycloak_data:/opt/keycloak/data
    networks:
      - keycloak-network

networks:
  keycloak-network:
    driver: bridge

volumes:
  keycloak_data:

The issue

When I go to https://www.mywebsite.com/keycloak/, it throws and error of 502 Bad Gateway with Nginx.

The Nginx error log shows the error of (The client IP wasn’t all zeros – I did that just for display purposes):

2024/05/23 16:32:34 [error] 101198#101198: *2 connect() failed (111: Connection refused) while connecting to upstream, client: 00.00.000.00, server: mywebsite.com, request: "GET /keycloak/ HTTP/1.1", upstream: "http://127.0.0.1:8080/keycloak/", host: "www.mywebsite.com"

My keycloak does not show any notable errors

2024-05-23 16:16:20,064 WARN  [org.keycloak.quarkus.runtime.cli.Picocli] (main) The following used options or option values are DEPRECATED and will be removed in a future release:
        - proxy: Use proxy-headers.
Consult the Release Notes for details.
2024-05-23 16:16:21,699 INFO  [org.keycloak.quarkus.runtime.hostname.DefaultHostnameProvider] (main) Hostname settings: Base URL: <unset>, Hostname: mywebsite.com, Strict HTTPS: true, Path: <request>, Strict BackChannel: false, Admin URL: <unset>, Admin: <request>, Port: -1, Proxied: true
2024-05-23 16:16:22,888 INFO  [org.infinispan.CONTAINER] (keycloak-cache-init) ISPN000556: Starting user marshaller 'org.infinispan.jboss.marshalling.core.JBossUserMarshaller'
2024-05-23 16:16:23,496 INFO  [org.infinispan.CLUSTER] (keycloak-cache-init) ISPN000088: Unable to use any JGroups configuration mechanisms provided in properties {}. Using default JGroups configuration!
2024-05-23 16:16:23,859 INFO  [org.infinispan.CLUSTER] (keycloak-cache-init) ISPN000078: Starting JGroups channel `ISPN`
2024-05-23 16:16:23,882 INFO  [org.jgroups.JChannel] (keycloak-cache-init) local_addr: 45137773-0601-447c-9194-18d2540e72f8, name: e60985799b73-886
2024-05-23 16:16:23,934 WARN  [org.jgroups.protocols.UDP] (keycloak-cache-init) JGRP000015: the send buffer of socket MulticastSocket was set to 1MB, but the OS only allocated 212.99KB
2024-05-23 16:16:23,934 WARN  [org.jgroups.protocols.UDP] (keycloak-cache-init) JGRP000015: the receive buffer of socket MulticastSocket was set to 20MB, but the OS only allocated 212.99KB
2024-05-23 16:16:23,934 WARN  [org.jgroups.protocols.UDP] (keycloak-cache-init) JGRP000015: the send buffer of socket MulticastSocket was set to 1MB, but the OS only allocated 212.99KB
2024-05-23 16:16:23,935 WARN  [org.jgroups.protocols.UDP] (keycloak-cache-init) JGRP000015: the receive buffer of socket MulticastSocket was set to 25MB, but the OS only allocated 212.99KB
2024-05-23 16:16:23,986 INFO  [org.jgroups.protocols.FD_SOCK2] (keycloak-cache-init) server listening on *.36638
2024-05-23 16:16:26,024 INFO  [org.jgroups.protocols.pbcast.GMS] (keycloak-cache-init) e60985799b73-886: no members discovered after 2024 ms: creating cluster as coordinator
2024-05-23 16:16:26,067 INFO  [org.infinispan.CLUSTER] (keycloak-cache-init) ISPN000094: Received new cluster view for channel ISPN: [e60985799b73-886|0] (1) [e60985799b73-886]
2024-05-23 16:16:26,138 INFO  [org.infinispan.CLUSTER] (keycloak-cache-init) ISPN000079: Channel `ISPN` local address is `e60985799b73-886`, physical addresses are `[172.27.0.2:52174]`
2024-05-23 16:16:26,188 WARN  [org.infinispan.CONFIG] (keycloak-cache-init) ISPN000569: Unable to persist Infinispan internal caches as no global state enabled
2024-05-23 16:16:27,979 WARN  [io.quarkus.agroal.runtime.DataSources] (JPA Startup Thread) Datasource <default> enables XA but transaction recovery is not enabled. Please enable transaction recovery by setting quarkus.transaction-manager.enable-recovery=true, otherwise data may be lost if the application is terminated abruptly
2024-05-23 16:16:29,949 WARN  [io.quarkus.vertx.http.runtime.VertxHttpRecorder] (main) The X-Forwarded-* and Forwarded headers will be considered when determining the proxy address. This configuration can cause a security issue as clients can forge requests and send a forwarded header that is not overwritten by the proxy. Please consider use one of these headers just to forward the proxy address in requests.
2024-05-23 16:16:30,471 INFO  [org.keycloak.connections.infinispan.DefaultInfinispanConnectionProviderFactory] (main) Node name: e60985799b73-886, Site name: null
2024-05-23 16:16:30,475 INFO  [org.keycloak.broker.provider.AbstractIdentityProviderMapper] (main) Registering class org.keycloak.broker.provider.mappersync.ConfigSyncEventListener
2024-05-23 16:16:32,724 INFO  [io.quarkus] (main) Keycloak 24.0.4 on JVM (powered by Quarkus 3.8.4) started in 14.131s. Listening on: http://0.0.0.0:8080
2024-05-23 16:16:32,727 INFO  [io.quarkus] (main) Profile prod activated.
2024-05-23 16:16:32,727 INFO  [io.quarkus] (main) Installed features: [agroal, cdi, hibernate-orm, jdbc-h2, keycloak, logging-gelf, narayana-jta, reactive-routes, resteasy-reactive, resteasy-reactive-jackson, smallrye-context-propagation, vertx]

How can I correctly configure my keycloak to work for an Nginx reverse proxy? I think I am close, but somewhere a header is incorrect and the connection is refused. sudo docker ps shows the contain is running, and so is the bridge:

fea3c118df24   bridge                           bridge    local
8df754b5793d   cadaskeycloak_keycloak-network   bridge    local
7707e0966816   host                             host      local
117517046e9d   none                             null      local

Thiết kế website giá rẻ

Danh mục

Using Keycloak with Nginx reverse proxy causes 502 bad gateway error

Setup

The issue