我如何在每次EC2实例启动时运行cloud-init启动脚本？

cloud_final_modules:
 - rightscale_userdata
 - scripts-per-once
 - scripts-per-boot
 - scripts-per-instance
 - scripts-user
 - keys-to-console
 - phone-home
 - final-message

#cloud-config
cloud_final_modules:
 - rightscale_userdata
 - scripts-per-once
 - scripts-per-boot
 - scripts-per-instance
 - [scripts-user, always]
 - keys-to-console
 - phone-home
 - final-message

/etc/init.d/cloud-init-user-scripts

/usr/bin/cloud-init-run-module once-per-instance user-scripts execute run-parts ${SCRIPT_DIR} >/dev/null && success || failure

 /usr/bin/cloud-init-run-module always user-scripts execute run-parts ${SCRIPT_DIR} >/dev/null && success || failure

#cloud-config

# run commands
# default: none
# runcmd contains a list of either lists or a string
# each item will be executed in order at rc.local like level with
# output to the console
# - runcmd only runs during the first boot
# - if the item is a list, the items will be properly executed as if
#   passed to execve(3) (with the first arg as the command).
# - if the item is a string, it will be simply written to the file and
#   will be interpreted by \'sh\'
#
# Note, that the list has to be proper yaml, so you have to quote
# any characters yaml would eat (\':\' can be problematic)
runcmd:
 - [ ls, -l, / ]
 - [ sh, -xc, \"echo $(date) \': hello world!\'\" ]
 - [ sh, -c, echo \"=========hello world\'=========\" ]
 - ls -l /root
 - [ wget, \"http://slashdot.org\", -O, /tmp/index.html ]

#cloud-config

# boot commands
# default: none
# this is very similar to runcmd, but commands run very early
# in the boot process, only slightly after a \'boothook\' would run.
# bootcmd should really only be used for things that could not be
# done later in the boot process.  bootcmd is very much like
# boothook, but possibly with more friendly.
# - bootcmd will run on every boot
# - the INSTANCE_ID variable will be set to the current instance id.
# - you can use \'cloud-init-per\' command to help only run once
bootcmd:
 - echo 192.168.1.130 us.archive.ubuntu.com >> /etc/hosts
 - [ cloud-init-per, once, mymkfs, mkfs, /dev/vdb ]

Usage: cloud-init-per frequency name cmd [ arg1 [ arg2 [ ... ] ]
   run cmd with arguments provided.

   This utility can make it easier to use boothooks or bootcmd
   on a per \"once\" or \"always\" basis.

   If frequency is:
      * once: run only once (do not re-run for new instance-id)
      * instance: run only the first boot for a given instance-id
      * always: run every boot

/var/lib/cloud/sem/

user-scripts.i-7f3f1d11

#!/bin/sh
rm /var/lib/cloud/sem/user-scripts.*

Content-Type: multipart/mixed; boundary=\"//\"
MIME-Version: 1.0

--//
Content-Type: text/cloud-config; charset=\"us-ascii\"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
Content-Disposition: attachment; filename=\"cloud-config.txt\"

#cloud-config
cloud_final_modules:
- [scripts-user, always]

--//
Content-Type: text/x-shellscript; charset=\"us-ascii\"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
Content-Disposition: attachment; filename=\"userdata.txt\"

#!/bin/bash
/bin/echo \"Hello World.\" >> /var/tmp/sdksdfjsdlf
--//

MyResource:
  Type: AWS::EC2::Instance
  Metadata:
    AWS::CloudFormation::Init:
      configSets:
        setup_process:
          - \"prepare\"
          - \"run_for_instance\"
      prepare:
        commands:
          01_apt_update:
            command: \"apt-get update\"
          02_clone_project:
            command: \"mkdir -p /replication && rm -rf /replication/* && git clone https://github.com/awslabs/dynamodb-cross-region-library.git /replication/dynamodb-cross-region-library/\"
          03_build_project:
            command: \"mvn install -DskipTests=true\"
            cwd: \"/replication/dynamodb-cross-region-library\"
          04_prepare_for_apac:
            command: \"mkdir -p /replication/replication-west && rm -rf /replication/replication-west/* && cp /replication/dynamodb-cross-region-library/target/dynamodb-cross-region-replication-1.2.1.jar /replication/replication-west/replication-runner.jar\"
      run_for_instance:
        commands:
          01_run:
            command: !Sub \"java -jar replication-runner.jar --sourceRegion us-east-1 --sourceTable ${TableName} --destinationRegion ap-southeast-1 --destinationTable ${TableName} --taskName -us-ap >/dev/null 2>&1 &\"
            cwd: \"/replication/replication-west\"
  Properties:
    UserData:
      Fn::Base64:
        !Sub |
          #cloud-config
          cloud_final_modules:
           - [scripts-user, always]
          runcmd:
           - /usr/local/bin/cfn-init -v -c setup_process --stack ${AWS::StackName} --resource MyResource --region ${AWS::Region}
           - /usr/local/bin/cfn-signal -e $? --stack ${AWS::StackName} --resource MyResource --region ${AWS::Region}