# Targets The target section is for target dependent files. ```yaml targets: lxc: create_message: config: - type: before: after: content: - ... lxd: vm: size: filesystem: ``` ## LXC The `create_message` field is a string which is displayed after new LXC container has been created. This string is rendered using Pongo2 and can include various fields from the definition file, e.g. `{{ image.description }}`. `config` is a list of container configuration options. The `type` must be `all`, `system` or `user`. The keys `before` and `after` are used for compatibility. Currently, the maximum value for compatibility is 5. If your desired compatibility level is 3 for example, you would use `before: 4` and `after: 2`. `content` describes the configuration which is to be written to the configuration file. ## LXD Valid keys are `size` and `filesystem`. The former specifies the VM image size in bytes. The latter specifies the root partition file system. It currently supports `ext4` and `btrfs`.