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Update cloud-init-datasources README

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Updating the README for this element to follow our new environment
variables convention.

Change-Id: I9cf21bd063ea2bfbea7244656af8f3d0e79f20b1
This commit is contained in:
Gregory Haynes 2015-04-08 06:56:37 +00:00
parent 7917e7416b
commit 954b9de79b
1 changed files with 15 additions and 12 deletions
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27
elements/cloud-init-datasources/README.rst
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@ -1,6 +1,7 @@
======================
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
@ -8,17 +9,19 @@ 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.
Environment Variables
---------------------
DIB_CLOUD_INIT_DATASOURCES
:Required: Yes
:Default: None
:Description: A comma-separated list of valid data sources to limit the data
sources that will be queried for metadata on first boot.
:Example: ``DIB_CLOUD_INIT_DATASOURCES="Ec2"`` will enable only the Ec2 data
source.
:Example: ``DIB_CLOUD_INIT_DATASOURCES="Ec2, ConfigDrive, OpenStack"`` will
enable the Ec2, ConfigDrive and OpenStack data sources.