website: note cloud-init req for openstack [GH-1750]
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@ -36,6 +36,8 @@ each category, the available configuration keys are alphabetized.
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* `source_image` (string) - The ID or full URL to the base image to use.
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This is the image that will be used to launch a new server and provision it.
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Unless you specify completely custom SSH settings, the source image must
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have `cloud-init` installed so that the keypair gets assigned properly.
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* `username` (string) - The username used to connect to the OpenStack service.
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If not specified, Packer will use the environment variable
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