Cài Keycloak Server

1. Cài đặt Keycloak

File docker-compose.yaml

version: "3.9"

services:
  postgres:
    image: postgres:15
    container_name: keycloak_postgres
    environment:
      POSTGRES_DB: keycloak
      POSTGRES_USER: keycloak
      POSTGRES_PASSWORD: password
    volumes:
      - postgres_data:/var/lib/postgresql/data
    networks:
      - keycloak_network

  keycloak:
    image: quay.io/keycloak/keycloak:24.0
    container_name: keycloak
    command: start-dev
    environment:
      KC_DB: postgres
      KC_DB_URL_HOST: postgres
      KC_DB_URL_DATABASE: keycloak
      KC_DB_USERNAME: keycloak
      KC_DB_PASSWORD: password
      KC_HOSTNAME: keycloak-dev.huce.edu.vn
      KC_PROXY: edge
      KC_HOSTNAME_STRICT: "false"
      KEYCLOAK_ADMIN: admin
      KEYCLOAK_ADMIN_PASSWORD: admin
    ports:
      - "8080:8080"
    depends_on:
      - postgres
    networks:
      - keycloak_network

volumes:
  postgres_data:

networks:
  keycloak_network:

Chạy lệnh:

docker-compose up -d --build

2. Cấu hình HA Proxy làm reverse proxy

Check từ HA Proxy Server có thông tới port 8080 của Keycloak Server không

nc -zv [ip keycloak server] 8080
nc -zv 192.168.100.36 8080

Như này là ok

Cấu hình HA Proxy reverse về Keycloak server (Port 8080). SSL xử lý tại HA Proxy luôn

global
        log /dev/log    local0
        log /dev/log    local1 notice
        chroot /var/lib/haproxy
        stats socket /run/haproxy/admin.sock mode 660 level admin
        stats timeout 30s
        user haproxy
        group haproxy
        daemon

        # Default SSL material locations
        ca-base /etc/ssl/certs
        crt-base /etc/ssl/private

        # See: https://ssl-config.mozilla.org/#server=haproxy&server-version=2.0.3&config=intermediate
        ssl-default-bind-ciphers ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384
        ssl-default-bind-ciphersuites TLS_AES_128_GCM_SHA256:TLS_AES_256_GCM_SHA384:TLS_CHACHA20_POLY1305_SHA256
        ssl-default-bind-options ssl-min-ver TLSv1.2 no-tls-tickets

defaults
        log     global
        mode    http
        option  httplog
        option  dontlognull
        timeout connect 5000
        timeout client  50000
        timeout server  50000
        errorfile 400 /etc/haproxy/errors/400.http
        errorfile 403 /etc/haproxy/errors/403.http
        errorfile 408 /etc/haproxy/errors/408.http
        errorfile 500 /etc/haproxy/errors/500.http
        errorfile 502 /etc/haproxy/errors/502.http
        errorfile 503 /etc/haproxy/errors/503.http
        errorfile 504 /etc/haproxy/errors/504.http

listen stats
    bind *:8404
    mode http
    stats enable
    stats uri /stats
    stats refresh 5s
    stats realm Haproxy\ Statistics
    stats auth tk:mk
    stats admin if TRUE

frontend http_in
    bind *:80
    mode http

    acl host_keycloak-dev hdr(host) -i keycloak-dev.huce.edu.vn

    use_backend keycloak_dev if host_keycloak-dev

    default_backend reject_all

frontend https_in
    bind *:443 ssl crt /etc/ssl/huce_cert/cert.pem
    mode http

    acl host_keycloak-dev hdr(host) -i keycloak-dev.huce.edu.vn

    use_backend keycloak_dev if host_keycloak-dev

    default_backend reject_all

backend keycloak_dev
    http-request set-header X-Forwarded-Proto https if { ssl_fc }
    http-request set-header X-Forwarded-For %[src]
    http-request set-header Host %[req.hdr(Host)]
    server keycloak_dev_1 192.168.100.36:8080 check

backend reject_all
    errorfile 403 /etc/haproxy/errors/403.http

Chạy lệnh:

systemctl restart haproxy