在AWS :: CloudFormation :: Init

Question

我有一些针对AS组的LaunchConfig

   "LaunchConfig": {
     "Type" : "AWS::AutoScaling::LaunchConfiguration",

     "Metadata" : {
        "AWS::CloudFormation::Init" : {
          "configSets" : {
            "InstallAndRun" : [ "Install" ]
          },

          "Install" : {

            "files" : {

              "/var/www/html/index.html" : {
                "content" : { "Fn::Join" : ["", [
                "<html\n",
                "<h1>Apache HTTP Server</h1>\n",
                "</html>\n"
              ]]},
              "mode"    : "000644",
              "owner"   : "apache",
              "group"   : "apache"
              }, 
            ......

可能或最好的方法是为index.html添加一些数据，例如，来自AWS :: EC2 :: Instance的instance-id使用＆＃34;文件＆＃34;段？

如果我添加{＆＃34; Ref＆＃34; ：＆＃34; AWS :: StackId＆＃34; }或{＆＃34;参考＆＃34; ：＆＃34; AWS :: Region＆＃34; }，它工作正常，但它来自Pseudo Parameter。

              "/var/www/html/index.html" : {
                "content" : { "Fn::Join" : ["", [
                "<html\n",
                "<h1>Apache HTTP Server</h1>\n",
                { "Ref" : "AWS::StackId" },
                "</html>\n"
              ]]},

谢谢！

Answer 1

我不相信它可以直接执行此操作，但您应该能够通过放置文件来完成此操作，然后运行命令来更新它：

（免责声明：我还没有明确地对此进行测试。）

{
    "AWS::CloudFormation::Init": {
        "configSets": {
            "InstallAndRun": [
                "Install",
                "UpdateIndexHtml"
            ]
        },
        "Install": {
            "files": {
                "/var/www/html/index.html": {
                    "content": {
                        "Fn::Join": [
                            "",
                            [
                                "<html\n",
                                "<h1>Apache HTTP Server</h1>\n",
                                "---INSTANCE_ID---\n",
                                "</html>\n"
                            ]
                        ]
                    },
                    "mode": "000644",
                    "owner": "apache",
                    "group": "apache"
                }
            }
        },
        "UpdateIndexHtml": {
            "commands": {
                "UpdateIndexHtml": {
                    "command": "sed -i \"s|---INSTANCE_ID---|$(curl -s http://169.254.169.254/latest/meta-data/instance-id)|\" /var/www/html/index.html"
                }
            }
        }
    }
}