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CFn で作ったec2にyum update 出来ない

CloudFormation

Posted at 2020-01-31

原因
VPC作成の時
EnableDnsSupport　EnableDnsHostnames を適用していなかったため

訂正前

MemosVPC:
    Type: AWS::EC2::VPC
    Properties:
      CidrBlock: 10.0.0.0/16
      EnableDnsSupport: false
      EnableDnsHostnames: false
      Tags:
      - Key: "Name"
        Value: "MemosVpc"

訂正後

MemosVPC:
    Type: AWS::EC2::VPC
    Properties:
      CidrBlock: 10.0.0.0/16
      EnableDnsSupport: true
      EnableDnsHostnames: true
      Tags:
      - Key: "Name"
        Value: "MemosVpc"

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