dt3674
2019-04-07 01:00
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您如何使用官方的mongo-go-driver连接到MongoDB Atlas [重复]

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I'm looking at the tutorial offered in conjunction with the release of the official mongo-go-driver and the connection example uses a MongoDB server on localhost

// Set client options
clientOptions := options.Client().ApplyURI("mongodb://localhost:27017")

However, the new hosted MongoDB service Atlas requires username and password to login. The connection string takes the format 

mongodb://[username:password@]host1[/[database][?options]]

but there is no Golang example in the driver examples for Atlas.

So I'm wondering, what is the best way to log into Atlas without hard coding a password into a source file that will be posted on Github?

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  • dsarttv037029 2019-04-07 01:00
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    I am hosting my test Atlas cluster on AWS so I wanted to have similar credential management to the AWS process. From the AWS credentials page:

    The default provider chain looks for credentials in the following order:

    1. Environment variables.

    2. Shared credentials file.

    3. If your application is running on an Amazon EC2 instance, IAM role for Amazon EC2.

    Therefore, I wanted to implement the environment veriable for my simple login to Atlas example. Code below assumes that the following line has been issued at the command line

    export MONGO_PW='<your Atlas admin user password>'

    Then the following program will verify your connection

    package main

import (
    "context"
    "fmt"
    "os"

    "go.mongodb.org/mongo-driver/mongo"
    "go.mongodb.org/mongo-driver/mongo/options"
)

var username = "<username>"
var host1 = "<atlas host>"  // of the form foo.mongodb.net

func main() {

    ctx := context.TODO()

    pw, ok := os.LookupEnv("MONGO_PW")
    if !ok {
        fmt.Println("error: unable to find MONGO_PW in the environment")
        os.Exit(1)
    }
    mongoURI := fmt.Sprintf("mongodb+srv://%s:%s@%s", username, pw, host1)
    fmt.Println("connection string is:", mongoURI)

    // Set client options and connect
    clientOptions := options.Client().ApplyURI(mongoURI)
    client, err := mongo.Connect(ctx, clientOptions)
    if err != nil {
        fmt.Println(err)
        os.Exit(1)
    }

    err = client.Ping(ctx, nil)
    if err != nil {
        fmt.Println(err)
        os.Exit(1)
    }

    fmt.Println("Connected to MongoDB!")
}

    From here the rest of the tutorial linked in my original question goes smoothly.

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