5장. Running first-boot commands by using cloud-init


To execute commands during the first start-up and initialization of a VM, you can use the runcmd and bootcmd sections of the cloud-init configuration.

  • The bootcmd section executes early in the initialization process and by default runs on every boot.
  • The runcmd section executes near the end of the process and is only executed during the first boot and initialization.

Prerequisites

  • Depending on the requirements of your datasource, edit the user-data file or add the following directive to the cloud.cfg.d directory:

    참고

    All user directives include #cloud-config at the top of the file so that cloud-init recognizes the file as containing user directives. When you include directives in the cloud.cfg.d directory, name the file *.cfg, and always include #cloud-config at the top of the file.

Procedure

  1. Add the sections for bootcmd and runcmd; include commands you want cloud-init to execute.

    #cloud-config
    users:
      - default
      - name: user2
        gecos: User N. Ame
        groups: users
    chpasswd:
      list: |
        root:password
        fedora:myfedpassword
        user2:mypassword2
      expire: False
    bootcmd:
     - echo New MOTD >> /etc/motd
    runcmd:
     - echo New MOTD2 >> /etc/motd
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