Merge pull request 'added litellm setup doc' (#26) from setup-litell-instance into main

Reviewed-on: #26

docs/02-Preparation/05-Setup-LiteLLM.md

@@ -0,0 +1,92 @@
+**vaessl: Setup LiteLLM**
+
+# LiteLLM Docker Compose setup
+
+I chose to use my existing Docker and PostgreSQL instance to spin up a LiteLLM container. I use Portainer stacks to write the docker-compose.yaml. Instead of creating a .env file I just wrote all environment variables into the yaml. The official docker-compose.yaml may vary.
+
+Before deploying the container create a config.yaml and prometheus.yml in the root folder:
+
+*config.yaml*
+```
+general_settings:
+  master_key: sk-key # 🔑 your proxy admin key (must start with sk-)
+  database_url: "postgresql://pgUser:pgUserPw@192.168.1.208:5432/litellm" 
+```
+
+*prometheus.yml*
+
+```
+global:
+  scrape_interval: 15s
+  evaluation_interval: 15s
+
+scrape_configs:
+  - job_name: "litellm"
+    static_configs:
+      - targets: ["litellm:4000"]
+```
+
+*Portainer stack*
+```
+services:
+  litellm:
+    #build:
+    #  context: .
+    #  args:
+    #    target: runtime
+    image: docker.litellm.ai/berriai/litellm:main-stable
+    volumes:
+      - /home/pi/docker/litellm/config.yaml:/app/config.yaml
+    command:
+      - "--config=/app/config.yaml"
+    ports:
+      - "4000:4000" # Map the container port to the host, change the host port if necessary
+    environment:
+      DATABASE_URL: "postgresql://pgUser:pgUserPw@192.168.1.208:5432/litellm"
+      STORE_MODEL_IN_DB: "True" # allows adding models to proxy via UI
+      OPENAI_API_KEY: "sk-key"
+      OPENAI_BASE_URL: "https://api.openai.com/v1"
+      LITELLM_MASTER_KEY: "sk-key"
+      LITELLM_SALT_KEY: "sk-saltkey"
+      PUID: 1000
+      PGID: 1000
+    #env_file:
+    #  - /home/pi/docker/litellm/.env
+    healthcheck:
+      test:
+        - CMD-SHELL
+        - python3 -c "import urllib.request; urllib.request.urlopen('http://localhost:4000/health/liveliness')"  # Command to execute for health check
+      interval: 30s  # Perform health check every 30 seconds
+      timeout: 10s   # Health check command times out after 10 seconds
+      retries: 3     # Retry up to 3 times if health check fails
+      start_period: 40s  # Wait 40 seconds after container start before beginning health checks
+    networks:
+      - postgres_pg_network
+  
+  prometheus:
+    image: prom/prometheus
+    volumes:
+      - /home/pi/docker/litellm/prometheus_data:/prometheus
+      - /home/pi/docker/litellm/prometheus.yml:/etc/prometheus/prometheus.yml
+    ports:
+      - "9090:9090"
+    command:
+      - "--config.file=/etc/prometheus/prometheus.yml"
+      - "--storage.tsdb.path=/prometheus"
+      - "--storage.tsdb.retention.time=15d"
+    restart: always
+
+volumes:
+  prometheus_data:
+    driver: local
+  postgres_data:
+    name: litellm_postgres_data # Named volume for Postgres data persistence
+
+networks:
+  postgres_pg_network:
+    external: true
+```
+
+
+
+Models can be added in the UI under localhost:4000 and will be saved into the database. No need to define them in the config.yaml