backup-u@.service

[Unit]
Description=Back up data from %i

[Service]
Type=oneshot
TimeoutStartSec=0
Nice=0
WorkingDirectory=/data/domains/%i/
EnvironmentFile=/etc/environment
ExecStartPre=/bin/bash -euxc 'sleep `shuf -i 0-400 -n 1`'
ExecStartPre=/bin/bash -euxc '/data/domains/%i/BACKUP'
ExecStart=/bin/bash -euxc ' \
  /bin/docker run \
    --rm \
    --name backup-%i \
    -h backup.container \
    -v /root:/root \
    -v /data/domains/%i:/backup indiepaas/duplicity \
      --full-if-older-than 1W \
      --encrypt-key ${ENCRYPT_KEY} \
        /backup \
        sftp://${BACKUP_DESTINATION}/%i'