使用AWS CloudFormation使用最新的AutoScaling和PHP启动AutoScaling服务器？

Question

我想通过EC2模板启动一个带有自动标注的CloudFormation实例的LAMP堆栈。每当我尝试它时，堆栈都是成功构建的，但是当我进入网站时，它给了我一个信息，即应用程序不支持旧版本的PHP。

现在，当我在网上搜索这个问题时，我找到了一个建议installing newer versions of httpd and php through yum的答案。我在EC2 linux终端上直接尝试了这一点，它成功了，我现在可以成功地访问这个网站了。问题是，我希望这些更新的版本直接安装在模板中。为此，我在自动缩放：：LaunchConfiguration中替换了这段代码

       "setup" : {
        "packages" : {
            "yum" : {
              "nfs-utils"       : [],
              "httpd"           : [],
              "php"             : [],
              "mysql"           : []
            }
        },

通过以下方式：

       "setup" : {
        "packages" : {
            "yum" : {
              "nfs-utils"       : [],
              "httpd24"         : [],
              "php72"           : [],
              "mysql"           : []
            }
        },

这将导致堆栈无法创建以AutoScalingGroup为param的LaunchConfiguration，并出现一个错误，该错误声明“接收到0成功信号”。这是我的LaunchConfiguration属性

    "Properties": {
    "AssociatePublicIpAddress" : true,
    "ImageId" : { "Fn::FindInMap" : [ "AWSRegionArch2AMI", { "Ref" : "AWS::Region" },
              { "Fn::FindInMap" : [ "AWSInstanceType2Arch", { "Ref" : "InstanceType" }, "Arch" ] } ] },
    "InstanceType"   : { "Ref" : "InstanceType" },
    "SecurityGroups" : [ {"Ref" : "WebServerSecurityGroup"} ],
    "KeyName"        : { "Ref" : "KeyName" },
    "IamInstanceProfile" : { "Ref" : "CloudWatchPutMetricsInstanceProfile" },
    "UserData" : { "Fn::Base64" : { "Fn::Join" : ["", [
            "#!/bin/bash -xe\n",
            "yum update -y aws-cfn-bootstrap\n",

            "/opt/aws/bin/cfn-init -v ",
            "         --stack ", { "Ref" : "AWS::StackName" },
            "         --resource LaunchConfig ",
            "         --configsets app_install ",
            "         --region ", { "Ref" : "AWS::Region" }, "\n",

            "/opt/aws/bin/cfn-signal -e $? ",
            "         --stack ", { "Ref" : "AWS::StackName" },
            "         --resource WebServerGroup ",
            "         --region ", { "Ref" : "AWS::Region" }, "\n"
    ]]}}
  }

知道为什么不起作用吗？对于直接通过模板安装最新的httpd和php，有什么建议吗？我是否应该删除软件包部分，并将安装httpd和php的脚本直接放在UserData中？

Answer 1

我自己解决了这个问题。我使用Ubuntu18.04AMI而不是Linux，因为它支持最新版本的PHP和Apache。

还必须稍微更改一下"UserData“：

        "UserData" : { "Fn::Base64" : { "Fn::Join" : ["", [
        "#!/bin/bash -xe\n",
        "apt-get update -y\n",
        "apt-get install -y python-pip\n",
        "mkdir -p /opt/aws/bin\n",
        "python /usr/lib/python2.7/dist-packages/easy_install.py --script-dir /opt/aws/bin https://s3.amazonaws.com/cloudformation-examples/aws-cfn-bootstrap-latest.tar.gz\n",
        "ln -s /usr/local/lib/python2.7/dist-packages/aws_cfn_bootstrap-1.4-py2.7.egg/init/ubuntu/cfn-hup /etc/init.d/cfn-hup \n",
        "systemctl daemon-reload \n",

        "chmod 700 /etc/init.d/cfn-hup \n",
        "chown root:root /etc/init.d/cfn-hup \n",
        "update-rc.d cfn-hup defaults \n",
        "update-rc.d cfn-hup enable \n",

        "/opt/aws/bin/cfn-init -v ",
        "         --stack ", { "Ref" : "AWS::StackName" },
        "         --resource LaunchConfig ",
        "         --configsets app_install ",
        "         --region ", { "Ref" : "AWS::Region" }, "\n",

        "/opt/aws/bin/cfn-signal -e $? ",
        "         --stack ", { "Ref" : "AWS::StackName" },
        "         --resource WebServerGroup ",
        "         --region ", { "Ref" : "AWS::Region" }, "\n"
    ]]}}

由于Ubuntu使用apt而不是yum，所以我包括了包：

          "setup" : {
        "packages" : {
            "apt" : {
              "nfs-common"    : [],
              "apache2"       : [],
              "php"           : [],
              "php-mysql"     : [],
              "mysql-common"  : []
            }
        },