创建一个集群模式的WordPress应用

通过此模板，您可以快速创建一个私有网络下双机版本的WordPress应用样例。该模版会自动创建一个私有网络和子网，云数据库（RDS）MySQL5.7，两台弹性云主机部署WordPress服务，以及一个弹性负载均衡提供外部访问。

该模版通过弹性云主机的userdata功能支持，将WordPress安装部署脚本同步下发到弹性云主机，在主机创建完成后，自动去下载安装WordPress，并且启动WordPress服务。具体使用userdata过程请参考上面创建单机WordPress应用中的介绍。

创建成功的资源栈，输出弹性负载均衡公网IP。

注意：目前资源编排服务不支持高可用组的创建。在创建多个弹性云主机时，需要在模版中定义多个云主机实例资源。

----------

编排模板说明:

模板包含几个主要部分。Format Version 部分是必需部分。模板中的某些部分可以任何顺序显示。但是，在您构建模板时，使用以下列表的逻辑顺序可能会很有用，因为一个部分中的值可能会引用上一个部分中的值。列表简要概述了每个部分。

Format Version（必选）:JDRO支持的模板版本号，当前版本号：2018-10-01

Description（可选）:一个描述模板的文本字符串，对模板进行详细描述。

Parameters（可选）:定义创建资源栈时，模板用户可以定制化的参数。在运行时 (创建或更新堆栈时) 传递到模板。您可在模板的 Resources 和 Outputs 部分中引用定义的这些参数。使用参数可以增强模板的灵活性，提高复用性。

Mappings（可选）:可用来指定条件参数值的密钥和关键值的映射，与查找表类似。您可通过使用 Resources 和 Outputs 部分中的 Fn::FindInMap 内部函数将键与相应的值匹配。

Conditions（可选）:Conditions 使用 Fn::And、Fn::Or、Fn::Not、Fn::Equals 等定义条件。在创建或更新资源栈时，系统先计算模板中的所有条件，然后再创建资源。创建与 true 条件关联的所有资源，忽略与 false 条件关联的所有资源。

Resources（可选）:用于详细定义使用该模板创建的资源栈所包含的资源，包括资源间的依赖关系、配置细节等。

Outputs（可选）:用于输出一些资源属性等有用信息。可以通过 API 或控制台获取输出的内容。

-----------

示例模板：

  
{
  "JDCLOUDTemplateFormatVersion": "2018-10-01",
  "Description": "JDRO WORDPRESS_WITH_CLUSTER TEMPLATE",
  "Parameters": {
    "VPCName": {
      "Default": "vpc",
      "Type": "String",
      "MinLength": "1",
      "MaxLength": "32",
      "Description": "Define the VPC Name. It cannot be same as an existing VPC name, otherwise the resource will fail to be created",
      "AllowedPattern": "^[a-zA-Z_][a-zA-Z0-9_-]*$",
      "ConstraintDescription": "Name only supports numbers, capital and lowercase letters, English underline and hyphen ."
    },
    "SubnetName": {
      "Default": "subnet",
      "Type": "String",
      "MinLength": "1",
      "MaxLength": "32",
      "Description": "Define the Subnet Name. It cannot be same as an existing Subnet name, otherwise the resource will fail to be created",
      "AllowedPattern": "^[a-zA-Z_][a-zA-Z0-9_-]*$",
      "ConstraintDescription": "Name only supports numbers, capital and lowercase letters, English underline and hyphen ."
    },
    "AddressPrefix": {
      "Default": "10.0.0.0/16",
      "Type": "String",
      "Description": "Give an exact CIDR",
      "AllowedValues": [
        "192.168.0.0/16",
        "172.16.0.0/16",
        "10.0.0.0/16"
      ],
      "ConstraintDescription": "Need give an exact CIDR."
    },
    "InstanceName1": {
      "Default": "vm1",
      "Type": "String",
      "MinLength": "1",
      "MaxLength": "32",
      "Description": "Define the Instance Name",
      "AllowedPattern": "^[a-zA-Z_][a-zA-Z0-9_-]*$",
      "ConstraintDescription": "Name only supports numbers, capital and lowercase letters, English underline and hyphen."
    },
    "InstanceName2": {
      "Default": "vm2",
      "Type": "String",
      "MinLength": "1",
      "MaxLength": "32",
      "Description": "Define the Instance Name",
      "AllowedPattern": "^[a-zA-Z_][a-zA-Z0-9_-]*$",
      "ConstraintDescription": "Name only supports numbers, capital and lowercase letters, English underline and hyphen."
    },
    "VMPassword": {
      "NoEcho": true,
      "Description": "Password for vm access",
      "Type": "String",
      "MinLength": "8",
      "MaxLength": "16",
      "AllowedPattern": "[a-zA-Z0-9]*"
    },
    "DiskName1": {
      "Default": "disk1",
      "Type": "String",
      "MinLength": "1",
      "MaxLength": "32",
      "Description": "The Disk Name",
      "AllowedPattern": "^[a-zA-Z_][a-zA-Z0-9_-]*$",
      "ConstraintDescription": "Name only supports numbers, capital and lowercase letters, English underline and hyphen."
    },
    "DiskName2": {
      "Default": "disk2",
      "Type": "String",
      "MinLength": "1",
      "MaxLength": "32",
      "Description": "The Disk Name",
      "AllowedPattern": "^[a-zA-Z_][a-zA-Z0-9_-]*$",
      "ConstraintDescription": "Name only supports  numbers, capital and lowercase letters, English underline and hyphen."
    },
    "DBName": {
      "Default": "wordpress",
      "Description": "MySQL database name",
      "Type": "String",
      "MinLength": "2",
      "MaxLength": "32",
      "AllowedPattern": "^[a-z][a-z0-9_]*$",
      "ConstraintDescription": "The name only supports lower case letters, numbers and English underline, no less than 2 characters and no more than 32 characters."
    },
    "DBUser": {
      "Default": "wordpress",
      "Description": "Username for MySQL database access",
      "Type": "String",
      "MinLength": "1",
      "MaxLength": "16",
      "AllowedPattern": "^[a-zA-Z][a-zA-Z0-9]*$",
      "ConstraintDescription": "must begin with a letter and contain only alphanumeric characters."
    },
    "DBPassword": {
      "NoEcho": true,
      "Description": "Password must contain and only supports letters both in upper case and lower case as well as figures, no less than 8 characters and no more than 16 characters. e.g. Ptest1130",
      "Type": "String",
      "MinLength": "8",
      "MaxLength": "16",
      "AllowedPattern": "[a-zA-Z0-9]*"
    },
    "LoadBalancerName": {
      "Default": "lb",
      "Description": "LoadBalancer name",
      "Type": "String",
      "MinLength": "1",
      "MaxLength": "32",
      "AllowedPattern": "^[a-zA-Z_][a-zA-Z0-9_-]*$",
      "ConstraintDescription": "Name only supports  numbers, capital and lowercase letters, English underline  and hyphen."
    },
    "TargetGroupName": {
      "Default": "lbtargetgroup",
      "Description": "TargetGroup Name",
      "Type": "String",
      "MinLength": "1",
      "MaxLength": "32",
      "AllowedPattern": "^[a-zA-Z_][a-zA-Z0-9_-]*$",
      "ConstraintDescription": "Name only supports  numbers, capital and lowercase letters, English underline  and hyphen."
    },
    "LBBackendName": {
      "Default": "lbbackend",
      "Description": "Backend Name",
      "Type": "String",
      "MinLength": "1",
      "MaxLength": "32",
      "AllowedPattern": "^[a-zA-Z_][a-zA-Z0-9_-]*$",
      "ConstraintDescription": "Name only supports  numbers, capital and lowercase letters, English underline  and hyphen."
    }
  },
  "Mappings": {
    "AZInfo": {
      "cn-north-1": {
        "az1": "cn-north-1a",
        "az2": "cn-north-1b"
      },
      "cn-east-1": {
        "az1": "cn-east-1a"
      },
      "cn-east-2": {
        "az1": "cn-east-2a",
        "az2": "cn-east-2b"
      },
      "cn-south-1": {
        "az1": "cn-south-1a"
      }
    },
    "ImageInfo": {
      "cn-north-1": {
        "image": "img-9ha1rgelkq"
      },
      "cn-east-1": {
        "image": "img-htaupmjlqq"
      },
      "cn-east-2": {
        "image": "img-ssazsh60t6"
      },
      "cn-south-1": {
        "image": "img-uxgb28v2y3"
      }
    }
  },
  "Resources": {
    "MyVPC": {
      "Type": "JDCLOUD::VPC::VPC",
      "Properties": {
        "VpcName": {
          "Ref": "VPCName"
        }
      }
    },
    "MySubnet": {
      "Type": "JDCLOUD::VPC::Subnet",
      "Properties": {
        "VpcId": {
          "Ref": "MyVPC"
        },
        "AddressPrefix": {
          "Ref": "AddressPrefix"
        },
        "SubnetName": {
          "Ref": "SubnetName"
        }
      }
    },
    "MyInstance1": {
      "Type": "JDCLOUD::VM::Instance",
      "Properties": {
        "Name": {
          "Ref": "InstanceName1"
        },
        "ImageId": {
          "Fn::FindInMap": [
            "ImageInfo",
            {
              "Ref": "JDCLOUD::Region"
            },
            "image"
          ]
        },
        "ElasticIp": {
          "BandwidthMbps": 1,
          "Provider": "bgp"
        },
        "InstanceType": "g.n2.medium",
        "AZ": {
          "Fn::FindInMap": [
            "AZInfo",
            {
              "Ref": "JDCLOUD::Region"
            },
            "az1"
          ]
        },
        "PrimaryNetworkInterface": {
          "NetworkInterface": {
            "SubnetId": {
              "Ref": "MySubnet"
            }
          }
        },
        "Password": {
          "Ref": "VMPassword"
        },
        "DataDisks": [
          {
            "AutoDelete": true,
            "CloudDiskSpec": {
              "Name": {
                "Ref": "DiskName1"
              },
              "AZ": {
                "Fn::FindInMap": [
                  "AZInfo",
                  {
                    "Ref": "JDCLOUD::Region"
                  },
                  "az1"
                ]
              },
              "DiskSizeGB": 20,
              "DiskType": "ssd"
            },
            "DiskCategory": "cloud"
          }
        ],
        "Userdata": {
          "Fn::Base64": {
            "Fn::Join": [
              "",
              [
                " #!/bin/bash \n",
                " Region=",
                {
                  "Ref": "JDCLOUD::Region"
                },
                "\n",
                " wget  jdro-userdata-${Region}.s3.${Region}.jcloudcs.com/signal.py -O /tmp/signal.py \n",
                " chmod +x /tmp/signal.py \n",
                " #user code begin \n",
                "DatabaseUser=",
                {
                  "Ref": "DBUser"
                },
                "\n",
                "DatabasePwd=",
                {
                  "Ref": "DBPassword"
                },
                "\n",
                "DatabaseName=",
                {
                  "Ref": "DBName"
                },
                "\n",
                "DatabaseHost=",
                {
                  "Fn::GetAtt": [
                    "MyDBInstance",
                    "InternalDomainName"
                  ]
                },
                "\n",
                "WebRootPath='/var/www/html'\n",
                "mkdir -p $WebRootPath \n",
                "yum install -y curl httpd mysql-server php php-common php-mysql\n",
                "yum install -y php-gd php-imap php-ldap php-odbc php-pear php-xml php-xmlrpc\n",
                "chkconfig httpd on\n",
                "wget http://wordpress.org/latest.tar.gz \n",
                "tar -xzvf latest.tar.gz \n",
                "sed -i \"s/database_name_here/$DatabaseName/\" wordpress/wp-config-sample.php\n",
                "sed -i \"s/username_here/$DatabaseUser/\" wordpress/wp-config-sample.php\n",
                "sed -i \"s/password_here/${DatabasePwd:-$DatabasePwdDef}/\" wordpress/wp-config-sample.php\n",
                "sed -i \"s/localhost/$DatabaseHost/\" wordpress/wp-config-sample.php\n",
                "sed -i \"s/bpache/apache/\" wordpress/wp-config-sample.php\n",
                "mv wordpress/wp-config-sample.php wordpress/wp-config.php\n",
                "cp -a wordpress/* $WebRootPath \n",
                "rm -rf wordpress*\n",
                "service httpd stop\n",
                "usermod -d $WebRootPath apache &>/dev/null\n",
                "chown apache:apache -R $WebRootPath\n",
                "service httpd start\n",
                " # user code end \n",
                "/tmp/signal.py --exit-code $? ",
                {
                  "Ref": "MyWaitConditionHandle"
                },
                " \n "
              ]
            ]
          }
        }
      }
    },
    "MyInstance2": {
      "Type": "JDCLOUD::VM::Instance",
      "Properties": {
        "Name": {
          "Ref": "InstanceName2"
        },
        "ImageId": {
          "Fn::FindInMap": [
            "ImageInfo",
            {
              "Ref": "JDCLOUD::Region"
            },
            "image"
          ]
        },
        "ElasticIp": {
          "BandwidthMbps": 1,
          "Provider": "bgp"
        },
        "InstanceType": "g.n2.medium",
        "AZ": {
          "Fn::FindInMap": [
            "AZInfo",
            {
              "Ref": "JDCLOUD::Region"
            },
            "az1"
          ]
        },
        "PrimaryNetworkInterface": {
          "NetworkInterface": {
            "SubnetId": {
              "Ref": "MySubnet"
            }
          }
        },
        "Password": {
          "Ref": "VMPassword"
        },
        "DataDisks": [
          {
            "AutoDelete": true,
            "CloudDiskSpec": {
              "Name": {
                "Ref": "DiskName2"
              },
              "AZ": {
                "Fn::FindInMap": [
                  "AZInfo",
                  {
                    "Ref": "JDCLOUD::Region"
                  },
                  "az1"
                ]
              },
              "DiskSizeGB": 20,
              "DiskType": "ssd"
            },
            "DiskCategory": "cloud"
          }
        ],
        "Userdata": {
          "Fn::Base64": {
            "Fn::Join": [
              "",
              [
                " #!/bin/bash \n",
                " Region=",
                {
                  "Ref": "JDCLOUD::Region"
                },
                "\n",
                " wget  jdro-userdata-${Region}.s3.${Region}.jcloudcs.com/signal.py -O /tmp/signal.py \n",
                " chmod +x /tmp/signal.py \n",
                " #user code begin \n",
                "DatabaseUser=",
                {
                  "Ref": "DBUser"
                },
                "\n",
                "DatabasePwd=",
                {
                  "Ref": "DBPassword"
                },
                "\n",
                "DatabaseName=",
                {
                  "Ref": "DBName"
                },
                "\n",
                "DatabaseHost=",
                {
                  "Fn::GetAtt": [
                    "MyDBInstance",
                    "InternalDomainName"
                  ]
                },
                "\n",
                "WebRootPath='/var/www/html'\n",
                "mkdir -p $WebRootPath \n",
                "yum install -y curl httpd mysql-server php php-common php-mysql\n",
                "yum install -y php-gd php-imap php-ldap php-odbc php-pear php-xml php-xmlrpc\n",
                "chkconfig httpd on\n",
                "wget http://wordpress.org/latest.tar.gz \n",
                "tar -xzvf latest.tar.gz \n",
                "sed -i \"s/database_name_here/$DatabaseName/\" wordpress/wp-config-sample.php\n",
                "sed -i \"s/username_here/$DatabaseUser/\" wordpress/wp-config-sample.php\n",
                "sed -i \"s/password_here/${DatabasePwd:-$DatabasePwdDef}/\" wordpress/wp-config-sample.php\n",
                "sed -i \"s/localhost/$DatabaseHost/\" wordpress/wp-config-sample.php\n",
                "sed -i \"s/bpache/apache/\" wordpress/wp-config-sample.php\n",
                "mv wordpress/wp-config-sample.php wordpress/wp-config.php\n",
                "cp -a wordpress/* $WebRootPath \n",
                "rm -rf wordpress*\n",
                "service httpd stop\n",
                "usermod -d $WebRootPath apache &>/dev/null\n",
                "chown apache:apache -R $WebRootPath\n",
                "service httpd start\n",
                " # user code end \n",
                "/tmp/signal.py --exit-code $? ",
                {
                  "Ref": "MyWaitConditionHandle"
                },
                " \n "
              ]
            ]
          }
        }
      }
    },
    "MyDBInstance": {
      "Type": "JDCLOUD::RDS::DBInstance",
      "Properties": {
        "Engine": "MySQL",
        "AZId": [
          {
            "Fn::FindInMap": [
              "AZInfo",
              {
                "Ref": "JDCLOUD::Region"
              },
              "az1"
            ]
          }
        ],
        "EngineVersion": "5.7",
        "InstanceClass": "db.mysql.s1.micro",
        "InstanceName": {
          "Ref": "DBName"
        },
        "InstanceStorageGB": 20,
        "VpcId": {
          "Ref": "MyVPC"
        },
        "SubnetId": {
          "Ref": "MySubnet"
        },
        "Database": {
          "CharacterSetName": "utf8",
          "DBName": {
            "Ref": "DBName"
          }
        },
        "Account": {
          "AccountName": {
            "Ref": "DBUser"
          },
          "AccountPassword": {
            "Ref": "DBPassword"
          }
        }
      }
    },
    "MyLoadBalancer": {
      "Type": "JDCLOUD::LoadBalance::LoadBalancer",
      "Properties": {
        "LoadBalancerName": {
          "Ref": "LoadBalancerName"
        },
        "SubnetId": {
          "Ref": "MySubnet"
        },
        "Azs": [
          {
            "Fn::FindInMap": [
              "AZInfo",
              {
                "Ref": "JDCLOUD::Region"
              },
              "az1"
            ]
          }
        ]
      }
    },
    "MyElasticIp": {
      "Type": "JDCLOUD::VPC::ElasticIp",
      "Properties": {
        "ElasticIPSpec": {
          "BandwidthMbps": 1,
          "Provider": "bgp"
        }
      }
    },
    "MyAssociateElasticIp": {
      "Type": "JDCLOUD::VPC::AssociateElasticIp",
      "Properties": {
        "InstanceId": {
          "Ref": "MyLoadBalancer"
        },
        "InstanceType": "lb",
        "ElasticIpId": {
          "Ref": "MyElasticIp"
        }
      }
    },
    "MyLoadBalancerTargetGroup": {
      "Type": "JDCLOUD::LoadBalance::TargetGroup",
      "Properties": {
        "TargetGroupName": {
          "Ref": "TargetGroupName"
        },
        "LoadBalancerId": {
          "Ref": "MyLoadBalancer"
        }
      }
    },
    "MyLoadBalancerRegisterTargets": {
      "Type": "JDCLOUD::LoadBalance::RegisterTargets",
      "Properties": {
        "TargetGroupId": {
          "Ref": "MyLoadBalancerTargetGroup"
        },
        "TargetSpecs": [
          {
            "InstanceId": {
              "Ref": "MyInstance1"
            },
            "Port": 80
          },
          {
            "InstanceId": {
              "Ref": "MyInstance2"
            },
            "Port": 80
          }
        ]
      }
    },
    "MyLoadBalancerBackend": {
      "Type": "JDCLOUD::LoadBalance::Backend",
      "Properties": {
        "LoadBalancerId": {
          "Ref": "MyLoadBalancer"
        },
        "Port": 80,
        "BackendName": {
          "Ref": "LBBackendName"
        },
        "TargetGroupIds": [
          {
            "Ref": "MyLoadBalancerTargetGroup"
          }
        ],
        "Protocol": "Http",
        "HealthCheckSpec": {
          "Protocol": "Http",
          "Port": 80,
          "HttpPath": "/"
        }
      }
    },
    "MyLoadBalancerListener": {
      "Type": "JDCLOUD::LoadBalance::Listener",
      "Properties": {
        "BackendId": {
          "Ref": "MyLoadBalancerBackend"
        },
        "LoadBalancerId": {
          "Ref": "MyLoadBalancer"
        },
        "Protocol": "Http",
        "Port": 80
      }
    },
    "MyWaitCondition": {
      "Type": "JDCLOUD::ResourceOrchestration::WaitCondition",
      "DependsOn": [
        "MyInstance1",
        "MyInstance2"
      ],
      "Properties": {
        "Count": 2,
        "Handle": {
          "Ref": "MyWaitConditionHandle"
        },
        "Timeout": "3600"
      }
    },
    "MyWaitConditionHandle": {
      "Type": "JDCLOUD::ResourceOrchestration::WaitConditionHandle",
      "Properties": {}
    }
  },
  "Outputs": {
    "wordpress_cluster_domain": {
      "Value": {
        "Fn::Join": [
          ":",
          [
            {
              "Fn::GetAtt": [
                "MyLoadBalancer",
                "ElasticIpAddress"
              ]
            },
            {
              "Fn::GetAtt": [
                "MyLoadBalancerListener",
                "Port"
              ]
            }
          ]
        ]
      }
    }
  }
}