Build high-security distributed applications using Golang and Vault

Using Golang and Vault to build high-security distributed applications

[Introduction]
With the popularity of cloud computing and distributed architecture, building a high-security distributed application has become a is particularly important. This article will introduce how to use Golang and Vault, two powerful tools, to build a high-security distributed application and provide code examples.

[Background]
Golang is a strongly typed programming language known for its efficient performance and concise syntax. Vault is an open source key management and secure warehouse tool focused on protecting applications' confidential data.

[Step 1: Install and configure Vault]
First, we need to install and configure Vault. We can download the executable file from Vault's official website and configure it into server mode. In the configuration file, we can specify Vault's listening address and port, as well as other security options.

[Step 2: Create Vault Token]
Vault uses tokens for authentication and authorization. We need to create a token in Vault and use it in the application to access Vault's API. The following is a sample code that demonstrates how to create a token through the Vault API:

package main

import (
    "fmt"
    "log"
    "os"

    "github.com/hashicorp/vault/api"
)

func main() {
    vaultAddr := os.Getenv("VAULT_ADDR")
    if vaultAddr == "" {
        log.Fatal("Vault address not set")
    }

    config := &api.Config{
        Address: vaultAddr,
    }

    client, err := api.NewClient(config)
    if err != nil {
        log.Fatal(err)
    }

    authPath := "auth/approle/login"
    secretPath := "secret/data/myapp/credentials"

    roleID := os.Getenv("VAULT_ROLE_ID")
    secretID := os.Getenv("VAULT_SECRET_ID")

    payload := map[string]interface{}{
        "role_id":   roleID,
        "secret_id": secretID,
    }

    resp, err := client.Logical().Write(authPath, payload)
    if err != nil {
        log.Fatal(err)
    }

    token := resp.Auth.ClientToken
    fmt.Println("Token:", token)

    client.SetToken(token)

    // Store the token securely for later use
}

[Step 3: Obtain confidential data through the Vault API]
Now that we have obtained a valid Vault token, we This can be used to obtain confidential data required by our application. The following is a sample code that demonstrates how to obtain confidential data through the Vault API:

package main

import (
    "fmt"
    "log"
    "os"

    "github.com/hashicorp/vault/api"
)

func main() {
    vaultAddr := os.Getenv("VAULT_ADDR")
    if vaultAddr == "" {
        log.Fatal("Vault address not set")
    }

    config := &api.Config{
        Address: vaultAddr,
    }

    client, err := api.NewClient(config)
    if err != nil {
        log.Fatal(err)
    }

    token := getTokenFromSecureStorage() // 从安全存储中获取之前存储的令牌

    client.SetToken(token)

    secretPath := "secret/data/myapp/credentials"

    secret, err := client.Logical().Read(secretPath)
    if err != nil {
        log.Fatal(err)
    }

    credentials := secret.Data["data"].(map[string]interface{})
    username := credentials["username"].(string)
    password := credentials["password"].(string)

    fmt.Println("Username:", username)
    fmt.Println("Password:", password)
}

[Summary]
This article introduces the process of how to use Golang and Vault to build high-security distributed applications. We protect the application's confidential data by creating and configuring a Vault, and using Vault's API to obtain the data. By using these two tools properly, we can build a highly secure distributed application. I hope this article can inspire readers and play a certain role in actual development.

[Reference]

1. Golang official website: https://golang.org/
2. Vault official website: https://www.vaultproject.io /

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