[Unit]
Description=Backup the "data" virtio filesystems
Before=var-lib-virtiofs-data.mount
RequiresMountsFor=/var
ConditionPathIsMountPoint=!/var/lib/virtiofs/data

# Unless DefaultDependencies= is set to false, service units will implicitly
# have dependencies of type Requires= and After= on basic.target as well as
# dependencies of type Conflicts= and Before= on shutdown.target.
#
# So, we need to set DefaultDependencies to "no" to break the ordering cycle.
DefaultDependencies=no

# Only run on Fedora CoreOS
ConditionOSRelease=ID=fedora
ConditionOSRelease=VARIANT_ID=coreos

[Service]
Type=oneshot
UMask=077
ExecStart=/bin/bash -Eeuo pipefail -c 'if grep -q "data /var/lib/virtiofs/data" /proc/mounts; then echo "ERROR: /var/lib/virtiofs/data is mounted!"; exit 1; else tar -cf /var/lib/private/virtiofs.tar -C /var/lib/virtiofs/data .; fi'
RemainAfterExit=yes