Afterburn

This is a small utility, typically used in conjunction with Ignition, which reads metadata from a given cloud-provider and applies it to the system. This can include adding SSH keys and writing cloud-specific attributes into an environment file (e.g. /run/metadata/afterburn), which can then be consumed by systemd service units via EnvironmentFile=.

Support

The supported cloud providers and their respective metadata are listed below. On CoreOS Container Linux, the supported providers and metadata are somewhat different.

• aws
  • SSH Keys
  • Attributes
    • AFTERBURNAWSHOSTNAME
    • AFTERBURNAWSPUBLICHOSTNAME
    • AFTERBURNAWSIPV4LOCAL
    • AFTERBURNAWSIPV4PUBLIC
    • AFTERBURNAWSAVAILABILITYZONE
    • AFTERBURNAWSINSTANCE_ID
    • AFTERBURNAWSREGION
• azure
  • SSH Keys
  • Attributes
    • AFTERBURNAZUREIPV4DYNAMIC
    • AFTERBURNAZUREIPV4VIRTUAL
• cloudstack-configdrive
  • SSH Keys
  • Attributes
    • AFTERBURNCLOUDSTACKAVAILABILITYZONE
    • AFTERBURNCLOUDSTACKINSTANCEID
    • AFTERBURNCLOUDSTACKSERVICEOFFERING
    • AFTERBURNCLOUDSTACKCLOUDIDENTIFIER
    • AFTERBURNCLOUDSTACKLOCALHOSTNAME
    • AFTERBURNCLOUDSTACKVMID
• cloudstack-metadata
  • SSH Keys
  • Attributes
    • AFTERBURNCLOUDSTACKAVAILABILITYZONE
    • AFTERBURNCLOUDSTACKCLOUDIDENTIFIER
    • AFTERBURNCLOUDSTACKHOSTNAME
    • AFTERBURNCLOUDSTACKINSTANCEID
    • AFTERBURNCLOUDSTACKIPV4LOCAL
    • AFTERBURNCLOUDSTACKIPV4PUBLIC
    • AFTERBURNCLOUDSTACKLOCALHOSTNAME
    • AFTERBURNCLOUDSTACKPUBLICHOSTNAME
    • AFTERBURNCLOUDSTACKSERVICEOFFERING
    • AFTERBURNCLOUDSTACKVM_ID
• digitalocean
  • SSH Keys
  • Network Configs
  • Attributes
    • AFTERBURNDIGITALOCEANHOSTNAME
    • AFTERBURNDIGITALOCEANIPV4ANCHOR0
    • AFTERBURNDIGITALOCEANIPV4PUBLIC0
    • AFTERBURNDIGITALOCEANIPV4PRIVATE0
    • AFTERBURNDIGITALOCEANIPV6PUBLIC0
    • AFTERBURNDIGITALOCEANIPV6PRIVATE0
    • AFTERBURNDIGITALOCEANREGION
• gcp
  • SSH Keys
  • Attributes
    • AFTERBURNGCPHOSTNAME
    • AFTERBURNGCPIPEXTERNAL0
    • AFTERBURNGCPIPLOCAL0
• openstack-metadata
  • SSH Keys
  • Attributes
    • AFTERBURNOPENSTACKHOSTNAME
    • AFTERBURNOPENSTACKIPV4LOCAL
    • AFTERBURNOPENSTACKIPV4PUBLIC
    • AFTERBURNOPENSTACKINSTANCE_ID
• packet
  • SSH Keys
  • Network Configs
  • Attributes
    • AFTERBURNPACKETHOSTNAME
    • AFTERBURNPACKETIPV4PUBLIC0
    • AFTERBURNPACKETIPV4PRIVATE0
    • AFTERBURNPACKETIPV6PUBLIC0
• vagrant-virtualbox
  • Attributes
    • AFTERBURNVAGRANTVIRTUALBOXPRIVATEIPV4
    • AFTERBURNVAGRANTVIRTUALBOX_HOSTNAME

Additionally, some attribute names are reserved for usage by custom metadata providers. These can be safely used by external providers on a platform not supported by Afterburn:

• custom
  • Attributes
    • AFTERBURNCUSTOMHOSTNAME
    • AFTERBURNCUSTOMPUBLICIPV4
    • AFTERBURNCUSTOMPRIVATEIPV4
    • AFTERBURNCUSTOMPUBLICIPV6
    • AFTERBURNCUSTOMPRIVATEIPV6