feat:Add host volume env variables for postgres, redis and weaviate (#9761)

docker/docker-compose.middleware.yaml

@@ -16,7 +16,7 @@ services:
                -c 'maintenance_work_mem=${POSTGRES_MAINTENANCE_WORK_MEM:-64MB}'
                -c 'effective_cache_size=${POSTGRES_EFFECTIVE_CACHE_SIZE:-4096MB}'
     volumes:
-      - ./volumes/db/data:/var/lib/postgresql/data
+      - ${PGDATA_HOST_VOLUME:-./volumes/db/data}:/var/lib/postgresql/data
     ports:
       - "${EXPOSE_POSTGRES_PORT:-5432}:5432"
     healthcheck:
@@ -31,7 +31,7 @@ services:
     restart: always
     volumes:
       # Mount the redis data directory to the container.
-      - ./volumes/redis/data:/data
+      - ${REDIS_HOST_VOLUME:-./volumes/redis/data}:/data
     # Set the redis password when startup redis server.
     command: redis-server --requirepass difyai123456
     ports:
@@ -94,7 +94,7 @@ services:
     restart: always
     volumes:
       # Mount the Weaviate data directory to the container.
-      - ./volumes/weaviate:/var/lib/weaviate
+      - ${WEAVIATE_HOST_VOLUME:-./volumes/weaviate}:/var/lib/weaviate
     env_file:
       - ./middleware.env
     environment:

docker/middleware.env.example

@@ -8,6 +8,7 @@ POSTGRES_PASSWORD=difyai123456
 POSTGRES_DB=dify
 # postgres data directory
 PGDATA=/var/lib/postgresql/data/pgdata
+PGDATA_HOST_VOLUME=./volumes/db/data
 
 # Maximum number of connections to the database
 # Default is 100
@@ -39,6 +40,11 @@ POSTGRES_MAINTENANCE_WORK_MEM=64MB
 # Reference: https://www.postgresql.org/docs/current/runtime-config-query.html#GUC-EFFECTIVE-CACHE-SIZE
 POSTGRES_EFFECTIVE_CACHE_SIZE=4096MB
 
+# -----------------------------
+# Environment Variables for redis Service
+REDIS_HOST_VOLUME=./volumes/redis/data
+# -----------------------------
+
 # ------------------------------
 # Environment Variables for sandbox Service
 SANDBOX_API_KEY=dify-sandbox
@@ -70,6 +76,7 @@ WEAVIATE_AUTHENTICATION_APIKEY_ALLOWED_KEYS=WVF5YThaHlkYwhGUSmCRgsX3tD5ngdN8pkih
 WEAVIATE_AUTHENTICATION_APIKEY_USERS=hello@dify.ai
 WEAVIATE_AUTHORIZATION_ADMINLIST_ENABLED=true
 WEAVIATE_AUTHORIZATION_ADMINLIST_USERS=hello@dify.ai
+WEAVIATE_HOST_VOLUME=./volumes/weaviate
 
 # ------------------------------
 # Docker Compose Service Expose Host Port Configurations