Encrypted swap/tmp in lvm?

[Stephen Quinney]

I'm wondering if it's possible to create an lvm volume to use as
encrypted tmp or swap? I'm getting this error:

Cannot satisfy pre-depends for cryptsetup --key-file=/dev/urandom create crypt_dev_mapper_vg0-swap /dev/mapper/vg0-swap: exist_/dev/mapper/vg0-swap -- system left untouched.

Here's the config I am trying to use, am I missing something here?

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disk_config /dev/vda disklabel:gpt-bios align-at:512B fstabkey:uuid
primary - 4096- - -

disk_config lvm
vg vg0 /dev/vda1
vg0-root / 10000 ext4 defaults,acl
vg0-swap - 4007MB - -
vg0-var /var/cache/afs 2000 ext4 defaults,nosuid,noexec,nodev
vg0-tmp /tmp 1000 ext4 defaults,nosuid,nodev

disk_config cryptsetup
swap swap /dev/mapper/vg0-swap swap defaults

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