Docker-CE Cloud-init for Ubuntu 16.04 (LTS)

user-data.txt

#cloud-config

# Upgrade the instance on first boot
# (ie run apt-get upgrade)
#
# Default: false
# Aliases: apt_upgrade
package_upgrade: true

# Install additional packages on first boot
#
# Default: none
#
# if packages are specified, this apt_update will be set to true

packages: ['docker-ce', 'golang-go']

apt:
  # The apt config consists of two major "areas".
  #
  # On one hand there is the global configuration for the apt feature.
  #
  # On one hand (down in this file) there is the source dictionary which allows
  # to define various entries to be considered by apt.

  ##############################################################################
  # Section 1: global apt configuration
  #
  # The following examples number the top keys to ease identification in
  # discussions.

  # 1.1 preserve_sources_list
  #
  # Preserves the existing /etc/apt/sources.list
  # Default: false - do overwrite sources_list. If set to true then any
  # "mirrors" configuration will have no effect.
  # Set to true to avoid affecting sources.list. In that case only
  # "extra" source specifications will be written into
  # /etc/apt/sources.list.d/*
  preserve_sources_list: true

  ##############################################################################
  # Section 2: source list entries
  #
  # This is a dictionary (unlike most block/net which are lists)
  #
  # The key of each source entry is the filename and will be prepended by
  # /etc/apt/sources.list.d/ if it doesn't start with a '/'.
  # If it doesn't end with .list it will be appended so that apt picks up it's
  # configuration.
  #
  # Whenever there is no content to be written into such a file, the key is
  # not used as filename - yet it can still be used as index for merging
  # configuration.
  #
  # The values inside the entries consost of the following optional entries:
  #   'source': a sources.list entry (some variable replacements apply)
  #   'keyid': providing a key to import via shortid or fingerprint
  #   'key': providing a raw PGP key
  #   'keyserver': specify an alternate keyserver to pull keys from that
  #                were specified by keyid

  # This allows merging between multiple input files than a list like:
  # cloud-config1
  # sources:
  #    s1: {'key': 'key1', 'source': 'source1'}
  # cloud-config2
  # sources:
  #    s2: {'key': 'key2'}
  #    s1: {'keyserver': 'foo'}
  # This would be merged to
  # sources:
  #    s1:
  #        keyserver: foo
  #        key: key1
  #        source: source1
  #    s2:
  #        key: key2
  #
  # The following examples number the subfeatures per sources entry to ease
  # identification in discussions.

  sources:
    curtin-dev-ppa.list:
      # 2.1 source
      #
      # Creates a file in /etc/apt/sources.list.d/ for the sources list entry
      # based on the key: "/etc/apt/sources.list.d/curtin-dev-ppa.list"
      source: "deb [arch=amd64] https://download.docker.com/linux/ubuntu $RELEASE stable"

      # 2.2 keyid
      #
      # Importing a gpg key for a given key id. Used keyserver defaults to
      # keyserver.ubuntu.com
      keyid: 0EBFCD88 # GPG key ID published on a key server

    ignored1:
      # 2.3 PPA shortcut
      #
      # Setup correct apt sources.list line and Auto-Import the signing key
      # from LP
      #
      # See https://help.launchpad.net/Packaging/PPA for more information
      # this requires 'add-apt-repository'. This will create a file in
      # /etc/apt/sources.list.d automatically, therefore the key here is
      # ignored as filename in those cases.
      source: "ppa:longsleep/golang-backports"    # Quote the string

## poweroff or reboot system after finished
# default: none
#
# power_state can be used to make the system shutdown, reboot or
# halt after boot is finished.  This same thing can be acheived by
# user-data scripts or by runcmd by simply invoking 'shutdown'.
# 
# Doing it this way ensures that cloud-init is entirely finished with
# modules that would be executed, and avoids any error/log messages
# that may go to the console as a result of system services like
# syslog being taken down while cloud-init is running.
#
# If you delay '+5' (5 minutes) and have a timeout of
# 120 (2 minutes), then the max time until shutdown will be 7 minutes.
# cloud-init will invoke 'shutdown +5' after the process finishes, or
# when 'timeout' seconds have elapsed.
#
# delay: form accepted by shutdown.  default is 'now'. other format
#        accepted is +m (m in minutes)
# mode: required. must be one of 'poweroff', 'halt', 'reboot'
# message: provided as the message argument to 'shutdown'. default is none.
# timeout: the amount of time to give the cloud-init process to finish
#          before executing shutdown.
# condition: apply state change only if condition is met.
#            May be boolean True (always met), or False (never met),
#            or a command string or list to be executed.
#            command's exit code indicates:
#               0: condition met
#               1: condition not met
#            other exit codes will result in 'not met', but are reserved
#            for future use.
#
power_state:
  delay: "now"
  mode: reboot
  message: First reboot
  condition: True