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Requirements

  • Three VMs with Docker installed
  • Docker installed
  • Open ports 6333 and 6335 on the VMs
    • 6333: Port for external communication with qdrant nodes.
    • 6335: Port for internal communication between qdrant nodes. Don’t expose to public.

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Installation

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QDRANT__SERVICE__API_KEY is a required environment variable

You can generate a random 32-byte hex string using the following command: 
openssl rand -hex 32
Copy and paste the generated string to replace #REPLACE_ME# in the docker-compose.yml file.

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[First VM] Create the docker-compose.yml file for first VM

  • replace commmand with --uri option to current VM address
version: "3.8"
services:
  qdrant:
    image: langgenius/qdrant:v1.7.3
    command: "./qdrant --uri 'http://dify-qdrant-node-01:6335'"
    network_mode: "host"
    restart: always
    volumes:
      - /data/qdrant/data/:/qdrant/storage
    environment:
      QDRANT__SERVICE__API_KEY: #REPLACE_ME#
      QDRANT__CLUSTER__ENABLED: 'true'

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[Second VM] Create the docker-compose.yml file for second VM

  • replace commmand with --bootstrap option to first VM address and --uri option to current VM address
version: "3.8"
services:
  qdrant:
    image: langgenius/qdrant:v1.7.3
    command: "./qdrant --bootstrap 'http://dify-qdrant-node-01:6335' --uri 'http://dify-qdrant-node-02:6335'"
    network_mode: "host"
    restart: always
    volumes:
      - /data/qdrant/data/:/qdrant/storage
    environment:
      QDRANT__SERVICE__API_KEY: #REPLACE_ME#
      QDRANT__CLUSTER__ENABLED: 'true'

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[Third VM] Create the docker-compose.yml file for third VM

  • replace commmand with --bootstrap option to first VM address and --uri option to current VM address
version: "3.8"
services:
  qdrant:
    image: langgenius/qdrant:v1.7.3
    command: "./qdrant --bootstrap 'http://dify-qdrant-node-01:6335' --uri 'http://dify-qdrant-node-03:6335'"
    network_mode: "host"
    restart: always
    volumes:
      - /data/qdrant/data/:/qdrant/storage
    environment:
      QDRANT__SERVICE__API_KEY: #REPLACE_ME#
      QDRANT__CLUSTER__ENABLED: 'true'

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Check the cluster status

Login one of VMs and run the following command to check the cluster status. 
curl -H 'api-key: <QDRANT__SERVICE__API_KEY>' localhost:6333/cluster | python3 -m json.tool
After you run the above command, you should see the following example output: 
{
    "result": {
        "status": "enabled",
        "peer_id": 2978525476254873,
        "peers": {
            "8497171801402828": {
                "uri": "http://172.206.68.136:6335/"
            },
            "2978525476254873": {
                "uri": "http://172.206.71.251:6335/"
            },
            "530461904384369": {
                "uri": "http://20.85.121.81:6335/"
            }
        },
        "raft_info": {
            "term": 1,
            "commit": 7,
            "pending_operations": 0,
            "leader": 530461904384369,
            "role": "Follower",
            "is_voter": true
        },
        "consensus_thread_status": {
            "consensus_thread_status": "working",
            "last_update": "2024-06-30T15:13:23.508350153Z"
        },
        "message_send_failures": {}
    },
    "status": "ok",
    "time": 8.7e-06
}

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Add Load Balancer

  • After deploying the qdrant cluster, you can add a load balancer to distribute the requests to the qdrant nodes.
  • Load balancer should be configured to distribute the requests to the qdrant nodes on port 6333.
  • 6335 only for internal communication, no need to expose it to the public.

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References