如何使用CloudFormation将卷附加和装载到EC2实例

Question

我找不到使用cloudformation附加和装载卷的方法.

我可以使用VolumeAttachment附加卷; 但是,当我lsblk在EC2实例处于运行状态后执行操作时,我将此附加实例视为已卸载.

有没有办法从Cloudformation文件挂载此实例？我可以使用linux命令安装它,但是更好地处理来自cloudformation的所有内容.

这是我到目前为止:

"MyEc2Instance" : {
   "Type" : "AWS::EC2::Instance",
   "Properties" : {
      "KeyName" : { "Ref" : "KeyName" }
   }
},
    "MyVolume" : {
      "Type" : "AWS::EC2::Volume",
      "Properties" : {
        "Size" : "50",
        "AvailabilityZone" : "xyz"
      }
    },
    "attachment" : {
      "Type" : "AWS::EC2::VolumeAttachment",
      "Properties" : {
        "InstanceId" : { "Ref" : "MyEc2Instance" },
        "VolumeId"  : { "Ref" : "MyVolume" },
        "Device" : "/dev/sdh"
      }
    }

当我lsblk在实例上做的时候,这是我看到的结果:

xvda    202:0    0   8G  0 disk
??xvda1 202:1    0   8G  0 part /
xvdh    202:112  0  50G  0 disk

请注意,即使我将设备名称指定为'sdh',它也会显示为'xvdh'.这是为什么？正如你所看到的,这是未安装的.我该怎么装？

Answer 1

正如helloV所提到的,当使用UserData启动实例时,您需要安装它.我发现CloudFormation模板的新YAML格式要容易得多,但我也把这个例子放在了JSON中.

JSON:

"UserData"       : { "Fn::Base64" : { "Fn::Join" : ["", [
    "#!/bin/bash -xe\n",
    "# create mount point directory\n",
    "mkdir /mnt/xvdh\n",
    "# create ext4 filesystem on new volume\n",    
    "mkfs -t ext4 /dev/xvdh\n",
    "# add an entry to fstab to mount volume during boot\n",
    "echo \"/dev/xvdh       /mnt/xvdh   ext4    defaults,nofail 0       2\" >> /etc/fstab\n",
    "# mount the volume on current boot\n",
    "mount -a\n"
]]}}

YAML:

UserData:
    'Fn::Base64': !Sub
      - |
        #!/bin/bash -xe
        # create mount point directory
        mkdir /mnt/xvdh
        # create ext4 filesystem on new volume           
        mkfs -t ext4 /dev/xvdh
        # add an entry to fstab to mount volume during boot
        echo "/dev/xvdh       /mnt/xvdh   ext4    defaults,nofail 0       2" >> /etc/fstab
        # mount the volume on current boot
        mount -a