add keycloak deployment files

.gitignore

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+/data
+/.env

Containerfile.keycloak

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+ARG KEYCLOAK_VERSION
+FROM quay.io/keycloak/keycloak:${KEYCLOAK_VERSION} as builder
+
+RUN /opt/keycloak/bin/kc.sh build --features-disabled=impersonation --db=postgres
+
+FROM quay.io/keycloak/keycloak:${KEYCLOAK_VERSION}
+WORKDIR /opt/keycloak
+COPY --from=builder /opt/keycloak/ /opt/keycloak/
+ENV KC_DB_URL=keycloak_db
+
+ENTRYPOINT ["/opt/keycloak/bin/kc.sh"]
+CMD ["start", "--optimized"]

README.md

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-# keycloak-deployment
+# Keycloak Deployment
 
+This repos contains all files required to deploy the keycloak service using docker-compose.
+
+The deployment is tailored towards a setup using postgres as the database and running keycloak behind a reverse proxy using HTTP. If you want to use it with any other configuration, you will have to adapt the compose file.
+
+## Setup
+
+Copy the `sample.env` file into a `.env` file and choose secure passwords. Then run `docker compose up -d`
+
+## Updating
+
+Change the Postgres and Keycloak version in your `.env` file and run `docker compose build` (only required for updating Keycloak). Then run `docker compose up -d` again.

compose.yml

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+version: '3.9'
+
+services:
+  keycloak_db:
+    image: postgres:${POSTGRES_VERSION}
+    restart: always
+    environment:
+      - POSTGRES_DB=keycloak
+      - POSTGRES_USER=${KC_DB_USERNAME}
+      - POSTGRES_PASSWORD=${KC_DB_PASSWORD}
+    volumes:
+      - ./data/postgres:/var/lib/postgresql/data
+
+  keycloak:
+    build:
+      dockerfile: Containerfile.keycloak
+      args:
+        KEYCLOAK_VERSION: ${KEYCLOAK_VERSION}
+    depends_on:
+      - keycloak_db
+    environment:
+      - KC_HEALTH_ENABLED=true
+      - KC_DB=postgres
+      - KC_DB_URL=jdbc:postgresql://keycloak_db:5432/keycloak
+      - KC_DB_URL_DATABASE=keycloak
+      - KC_PROXY_ADDRESS_FORWARDING=true
+      - KC_HOSTNAME_STRICT_HTTPS=false
+      - KC_PROXY=edge
+      - KC_HTTP_ENABLED=true
+      - KC_HOSTNAME_STRICT=false
+      - KC_HOSTNAME=${KC_HOSTNAME}
+      - KC_DB_USERNAME=${KC_DB_USERNAME}
+      - KC_DB_PASSWORD=${KC_DB_PASSWORD}
+      - KEYCLOAK_ADMIN=${KEYCLOAK_ADMIN}
+      - KEYCLOAK_ADMIN_PASSWORD=${KEYCLOAK_ADMIN_PASSWORD}
+    restart: always
+    ports:
+      - 8080:8080

sample.env

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+KEYCLOAK_VERSION=22.0
+KEYCLOAK_ADMIN=idpadmin
+KEYCLOAK_ADMIN_PASSWORD=
+KC_DB_USERNAME=ctbkidpdb
+KC_DB_PASSWORD=
+KC_HOSTNAME=idp.ctbk.de
+POSTGRES_VERSION=16.0