连接 Milvus 服务器

本主题介绍如何建立与 Milvus 服务器的客户端连接，并配置常用连接选项。

前提条件

• 已安装所使用语言的 SDK。有关详情，请参阅Python SDK、Java SDK、Go SDK 或Nodejs SDK。

• Milvus 服务器地址（本地默认地址：http://localhost:19530 ，代理端口19530）。

• 如果启用了身份验证，请提供令牌或用户名 + 密码。令牌可以是username:password （如root:Milvus ）。有关详情，请参阅 "验证用户访问"和 "创建用户和角色"。

通过 URI 连接（禁用身份验证）

使用 Milvus 服务器地址（如http://localhost:19530 ）建立连接。

from pymilvus import MilvusClient

client = MilvusClient("http://localhost:19530")

import io.milvus.v2.client.ConnectConfig;
import io.milvus.v2.client.MilvusClientV2;

ConnectConfig config = ConnectConfig.builder()
        .uri("http://localhost:19530")
        .build();
client = new MilvusClientV2(config);

import { MilvusClient } from '@zilliz/milvus2-sdk-node';

const client = new MilvusClient({
   address: 'http://localhost:19530'
});

import "github.com/milvus-io/milvus/client/v2/milvusclient"

c, err := milvusclient.New(ctx, &milvusclient.ClientConfig{
    Address: "localhost:19530",
})

# The RESTful API is stateless, so there is no persistent connection.
# Each request hits the server directly; the /collections/list endpoint
# doubles as a health check when you need to verify reachability.
export HOST="localhost:19530"

curl -X POST "http://${HOST}/v2/vectordb/collections/list" \
    -H "Content-Type: application/json" \
    -H "Request-Timeout: 10" \
    -d '{}'

使用凭证连接（启用身份验证）

提供"username:password" 或user 和password 形式的令牌。默认内置管理员为root:Milvus （生产时可更改）。

from pymilvus import MilvusClient

# Token form
client = MilvusClient(
    uri="http://localhost:19530",
    token="root:Milvus",
)

# Or explicit user/password
client = MilvusClient(
    uri="http://localhost:19530",
    user="root",
    password="Milvus",
)

import io.milvus.v2.client.ConnectConfig;
import io.milvus.v2.client.MilvusClientV2;

ConnectConfig config = ConnectConfig.builder()
        .uri("http://localhost:19530")
        .username("root")
        .password("Milvus")
        .build();
client = new MilvusClientV2(config);

import { MilvusClient } from '@zilliz/milvus2-sdk-node';

const client = new MilvusClient({
   address: 'http://localhost:19530',
   username: 'root',
   password: 'Milvus'
});

import "github.com/milvus-io/milvus/client/v2/milvusclient"

c, err := milvusclient.New(ctx, &milvusclient.ClientConfig{
    Address: "localhost:19530",
    Username: "root",
    Password: "Milvus",
})

export HOST="localhost:19530"
export TOKEN="root:Milvus"

curl -X POST "http://${HOST}/v2/vectordb/collections/list" \
    -H "Authorization: Bearer ${TOKEN}" \
    -H "Content-Type: application/json" \
    -H "Request-Timeout: 10" \
    -d '{}'

配置超时

设置客户端连接的默认超时时间：

from pymilvus import MilvusClient

client = MilvusClient(uri="http://localhost:19530", timeout=1000) # If not set, the timeout defaults to 10s

import io.milvus.v2.client.ConnectConfig;
import io.milvus.v2.client.MilvusClientV2;

ConnectConfig config = ConnectConfig.builder()
        .uri("http://localhost:19530")
        .rpcDeadlineMs(1000)
        .build();
client = new MilvusClientV2(config);

import { MilvusClient } from '@zilliz/milvus2-sdk-node';

const client = new MilvusClient({
   address: 'http://localhost:19530',
   username: 'root',
   password: 'Milvus',
   timeout: 1000 // ms
});
// await client.listCollections({ timeout: 2000})

import "github.com/milvus-io/milvus/client/v2/milvusclient"

ctx, cancel := context.WithTimeout(context.Background(), time.Second)
defer cancel()
c, err := milvusclient.New(ctx, &milvusclient.ClientConfig{
    Address: "localhost:19530",
})

export HOST="localhost:19530"
export TOKEN="root:Milvus"

# Request-Timeout is applied per-request (unit: seconds). --max-time
# caps the total curl wall-clock so the client gives up even if the
# server never responds.
curl -X POST "http://${HOST}/v2/vectordb/collections/list" \
    -H "Authorization: Bearer ${TOKEN}" \
    -H "Content-Type: application/json" \
    -H "Request-Timeout: 10" \
    --max-time 7 \
    -d '{}'

连接到特定数据库

在构建过程中，使用db_name 选择目标数据库。也可以稍后使用using_database() 进行切换。

from pymilvus import MilvusClient

# Set the database when creating the client
client = MilvusClient(
    uri="http://localhost:19530",
    token="root:Milvus",
    db_name="analytics",
)

# (Optional) Switch the active database later
# client.using_database("reports")

import io.milvus.v2.client.ConnectConfig;
import io.milvus.v2.client.MilvusClientV2;

ConnectConfig config = ConnectConfig.builder()
        .uri("http://localhost:19530")
        .username("root")
        .password("Milvus")
        .dbName("analytics")
        .build();
client = new MilvusClientV2(config);

import { MilvusClient } from '@zilliz/milvus2-sdk-node';

const client = new MilvusClient({
   address: 'http://localhost:19530',
   username: 'root',
   password: 'Milvus',
   database: 'analytics'
});
// (Optional) Switch the active database later
// await milvusClient.useDatabase({
//   db_name: 'reports',
//});

import "github.com/milvus-io/milvus/client/v2/milvusclient"

c, err := milvusclient.New(ctx, &milvusclient.ClientConfig{
    Address: "localhost:19530",
    DBName:  "analytics",
    APIKey:  "root:Milvus",
})
// (Optional) switch the active database later with:
err = c.UseDatabase(ctx, milvusclient.NewUseDatabaseOption("reports"))

export HOST="localhost:19530"
export TOKEN="root:Milvus"

# Target a specific database by setting "dbName" in the request body.
# The RESTful API is stateless, so include "dbName" on every request
# that should run against a non-default database.
curl -X POST "http://${HOST}/v2/vectordb/collections/list" \
    -H "Authorization: Bearer ${TOKEN}" \
    -H "Content-Type: application/json" \
    -H "Request-Timeout: 10" \
    -d '{
      "dbName": "analytics"
    }'

下一步

• 创建 Collections

• 插入实体

• 基本向量搜索