问题

使用 Java SDK 从共享镜像库创建 Linux 虚拟机，自定义镜像。

```java
virtualMachine = azure.virtualMachines()
					    .define(linuxVMName)
					    .withRegion(location)
					    .withExistingResourceGroup(resourceGroup)
					    .withExistingPrimaryNetworkInterface(networkInterface)
					    .withLinuxCustomImage(customImageUrl)
					    .withRootUsername(username)
					    .withRootPassword(password)
					    .withCustomData(custDatastring)
					    .withComputerName(linuxVMName)
					    .withExistingStorageAccount(storageAccount)
					    .withSize(vmSize())
					    .create();

如何在 withCustomData 部分传递 Linux Shell 脚本。我知道该方法的输入是 Base64 编码的字符串。
我正在尝试传递一个示例脚本

#!/bin/bash
echo "This is some text" > randomtext.txt

附注：我不能在此处为脚本创建文件，我必须直接将上述命令传递给 API。这是我的要求。

在这里应该如何处理 customData 部分。任何帮助将不胜感激。

虚拟机创建请求中的操作系统配置 JSON

"osProfile": {
    "computerName": "xxxx",
    "adminUsername": "xxx",
    "adminPassword": "xxx",
    "customData": "IyEvYmluL2Jhc2gKIGVjaG8gIlRoaXMgaXMgc29tZSB0ZXh0IiA+IHJhbmRvbXRleHQudHh0",
    "linuxConfiguration": {
        "disablePasswordAuthentication": false
    }
}

响应中的操作系统配置

"osProfile": {
    "computerName": "xxxx",
    "adminUsername": "xxxx",
    "linuxConfiguration": {
        "disablePasswordAuthentication": false,
        "provisionVMAgent": true
    },
    "secrets": [],
    "allowExtensionOperations": true,
    "requireGuestProvisionSignal": true
}

我在这里使用的镜像是基于 CentOS 8 构建的自定义 Linux 镜像。

<details>
<summary>英文:</summary>

I am creating a linux vm using a custom image from an shared image gallery using java sdk.

virtualMachine = azure.virtualMachines()
.define(linuxVMName)
.withRegion(location)
.withExistingResourceGroup(resourceGroup)
.withExistingPrimaryNetworkInterface(networkInterface)
.withLinuxCustomImage(customImageUrl)
.withRootUsername(username)
.withRootPassword(password)
.withCustomData(custDatastring)
.withComputerName(linuxVMName)
.withExistingStorageAccount(storageAccount)
.withSize(vmSize())
.create();

How to pass a linux shell script here in the withCustomData part. I know the input for the method is Base64 encoded string.
I am trying to pass an example script

#!/bin/bash
echo "This is some text" > randomtext.txt

p.s: I can't create a file for the script here, i have to pass the above command directly to the api. That is my requirement.

How should i handle the customdata part here. Any help is appreciated.


vm create request osprofile json

"osProfile":{"computerName":"xxxx","adminUsername":"xxx","adminPassword":"xxx","customData":"IyEvYmluL2Jhc2gKIGVjaG8gIlRoaXMgaXMgc29tZSB0ZXh0IiA+IHJhbmRvbXRleHQudHh0","linuxConfiguration":{"disablePasswordAuthentication":false}}

response os profile

"osProfile": {
"computerName": "xxxx",
"adminUsername": "xxxx",
"linuxConfiguration": {
"disablePasswordAuthentication": false,
"provisionVMAgent": true
},
"secrets": [],
"allowExtensionOperations": true,
"requireGuestProvisionSignal": true
}

The image i use here is a custom linux image built on centos 8

</details>


# 答案1
**得分**: 1

请参考[Java 8基本Base64][1]，您可以使用`java.util.Base64`。首先，像平常一样导入它：

```java
import java.util.Base64;

然后：

String originalInput = "#!/bin/bash\n echo \"This is some text\" > randomtext.txt";
String encodedString = Base64.getEncoder().encodeToString(originalInput.getBytes());

接着像这样使用它：

virtualMachine = azure.virtualMachines()
                    .define(linuxVMName)
                    .withRegion(location)
                    .withExistingResourceGroup(resourceGroup)
                    .withExistingPrimaryNetworkInterface(networkInterface)
                    .withLinuxCustomImage(customImageUrl)
                    .withRootUsername(username)
                    .withRootPassword(password)
                    .withCustomData(encodedString)
                    .withComputerName(linuxVMName)
                    .withExistingStorageAccount(storageAccount)
                    .withSize(vmSize())
                    .create();

我尝试过了。

在Linux上，这些数据通过ovf-env.xml文件传递给虚拟机，在部署过程中，该文件会被复制到/var/lib/waagent目录中。新版本的Microsoft Azure Linux代理还会将Base64编码的数据复制到/var/lib/waagent/CustomData目录，以提供更方便的访问。

在我的Ubuntu 16.04 LTS系统中，我可以在路径/var/lib/waagent/ovf-env.xml中找到自定义数据。

关于更多示例，您可以参考此线程以及Microsoft Azure上的自定义数据和Cloud-Init。

import java.util.Base64;

String originalInput = "#!/bin/bash\n echo \"This is some text\" > randomtext.txt";
String encodedString = Base64.getEncoder().encodeToString(originalInput.getBytes());

virtualMachine = azure.virtualMachines()
                        .define(linuxVMName)
                        .withRegion(location)
                        .withExistingResourceGroup(resourceGroup)
                        .withExistingPrimaryNetworkInterface(networkInterface)
                        .withLinuxCustomImage(customImageUrl)
                        .withRootUsername(username)
                        .withRootPassword(password)
                        .withCustomData(encodedString)
                        .withComputerName(linuxVMName)
                        .withExistingStorageAccount(storageAccount)
                        .withSize(vmSize())
                        .create();