以下是一个包含正确配置的CloudFormation模板，用于在Ubuntu上安装和运行CloudWatch代理。该模板使用了AWS Systems Manager Parameter Store，以安全地存储和获取代理配置信息。

Resources:
  ParameterStoreKey:
    Type: AWS::SSM::Parameter
    Properties:
      Name: /cloudwatch-agent-config
      Description: CloudWatch Agent config
      Type: String
      Value: |
        {
          "metrics":{
            "metrics_collected":{
              "mem":{
                "measurement":["mem_used_percent"],
                "metrics_collection_interval":60,
                "append_dimensions":{
                  "InstanceId":"${aws:InstanceId}"
                }
              },
              "swap":{
                "measurement":["swap_used_percent"],
                "metrics_collection_interval":60,
                "append_dimensions":{
                  "InstanceId":"${aws:InstanceId}"
                }
              }
            }
          }
        }

  IAMRole:
    Type: AWS::IAM::Role
    Properties:
      AssumeRolePolicyDocument: 
        Version: '2012-10-17'
        Statement:
        - Effect: Allow
          Principal: 
            Service: [ec2.amazonaws.com]
          Action: ['sts:AssumeRole']
      Path: "/"
      ManagedPolicyArns:
        - arn:aws:iam::aws:policy/CloudWatchAgentServerPolicy

  InstanceProfile:
    Type: "AWS::IAM::InstanceProfile"
    Properties: 
      Path: "/"
      Roles: 
        - !Ref IAMRole

  EC2Instance:
    Type: AWS::EC2::Instance
    Properties:
      ImageId: ami-0c55b159cbfafe1f0
      InstanceType: t2.micro
      KeyName: my-key
      UserData:
        Fn::Base64:
        |
          #! /bin/bash
          echo "{ \"metrics\": { \"metrics_collected\": { \"mem\": { \"measurement\": [\"mem_used_percent\"], \"metrics_collection_interval\": 60, \"append_dimensions\": { \"InstanceId\": \"\$(curl -s http://169.254.169.254/latest/meta-data/instance-id)\" } }, \"swap\": { \"measurement\": [\"