openstack/diskimage-builder
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74b777dae8
diskimage-builder/elements/cloud-init-datasources/README.rst
Gregory Haynes c4bbb6f3bc Create docs site containing element READMEs 
We currently do not have the ability to create a docs site which
outlines all the elements.

Change-Id: I77ccf61e0c4b1509b3e7ce9b8f15ea5ccfd50d9b
2015-02-10 11:45:35 -08:00

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cloud-init-datasources

Configures cloud-init to only use an explicit list of data sources.

Cloud-init contains a growing collection of data source modules and most are enabled by default. This causes cloud-init to query each data source on first boot. This can cause delays or even boot problems depending on your environment.

You must define DIB_CLOUD_INIT_DATASOURCES as a comma-separated list of valid data sources to limit the data sources that will be queried for metadata on first boot.

For instance, to enable only the Ec2 datasource:

export DIB_CLOUD_INIT_DATASOURCES="Ec2"

Or to enable multiple:

export DIB_CLOUD_INIT_DATASOURCES="Ec2, ConfigDrive, OpenStack"

Including this element without setting DIB_CLOUD_INIT_DATASOURCES will cause image builds to fail.