41 lines
1.2 KiB
Markdown
41 lines
1.2 KiB
Markdown
# Distribution via Config Drive
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CoreOS supports providing configuration data via [config drive][config-drive]
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disk images. Currently only providing a single script or cloud config file is
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supported.
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[config-drive]: http://docs.openstack.org/user-guide/cli_config_drive.html
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## Contents and Format
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The image should be a single FAT or ISO9660 file system with the label
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`config-2` and the configuration data should be located at
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`openstack/latest/user_data`.
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For example, to wrap up a config named `user_data` in a config drive image:
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```sh
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mkdir -p /tmp/new-drive/openstack/latest
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cp user_data /tmp/new-drive/openstack/latest/user_data
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mkisofs -R -V config-2 -o configdrive.iso /tmp/new-drive
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rm -r /tmp/new-drive
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```
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If on OS X, replace the `mkisofs` invocation with:
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```sh
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hdiutil makehybrid -iso -joliet -default-volume-name config-2 -o configdrive.iso /tmp/new-drive
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```
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## QEMU virtfs
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One exception to the above, when using QEMU it is possible to skip creating an
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image and use a plain directory containing the same contents:
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```sh
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qemu-system-x86_64 \
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-fsdev local,id=conf,security_model=none,readonly,path=/tmp/new-drive \
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-device virtio-9p-pci,fsdev=conf,mount_tag=config-2 \
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[usual qemu options here...]
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```
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