Rsync files into container from host?

LXD
2

You have to be slightly creative but it can be made to work pretty well.

stgraber@castiana:~$ cat fake-ssh 
#!/bin/sh
ctn="${1}"
shift
exec lxc exec "${ctn}" -- "$@"

stgraber@castiana:~$ rsync -avPz recover/ -e ./fake-ssh xenial:/tmp/a
sending incremental file list
created directory /tmp/a
./
IMG_3705.JPG
      8,664,462 100%   28.68MB/s    0:00:00 (xfr#1, to-chk=14/16)
IMG_3726.JPG
      7,648,038 100%   13.61MB/s    0:00:00 (xfr#2, to-chk=13/16)
IMG_3757.JPG
      5,792,282 100%    7.72MB/s    0:00:00 (xfr#3, to-chk=12/16)
IMG_3782.JPG
      9,272,999 100%    8.89MB/s    0:00:00 (xfr#4, to-chk=11/16)
IMG_3788.JPG
      7,071,538 100%    5.57MB/s    0:00:01 (xfr#5, to-chk=10/16)
IMG_3809.JPG
      6,089,773 100%   14.52MB/s    0:00:00 (xfr#6, to-chk=9/16)
IMG_3835.JPG
      8,419,272 100%   12.35MB/s    0:00:00 (xfr#7, to-chk=8/16)
IMG_3855.JPG
      8,346,781 100%    8.88MB/s    0:00:00 (xfr#8, to-chk=7/16)
IMG_3867.JPG
      5,521,290 100%    4.86MB/s    0:00:01 (xfr#9, to-chk=6/16)
IMG_3892.JPG
      3,527,415 100%   16.49MB/s    0:00:00 (xfr#10, to-chk=5/16)
IMG_3894.JPG
      5,490,255 100%   13.74MB/s    0:00:00 (xfr#11, to-chk=4/16)
IMG_3899.JPG
      5,402,756 100%    9.45MB/s    0:00:00 (xfr#12, to-chk=3/16)
IMG_3908.JPG
      7,180,567 100%    9.01MB/s    0:00:00 (xfr#13, to-chk=2/16)
IMG_3915.JPG
      5,370,654 100%    5.53MB/s    0:00:00 (xfr#14, to-chk=1/16)
IMG_3939.JPG
      5,320,861 100%    4.65MB/s    0:00:01 (xfr#15, to-chk=0/16)

sent 98,861,183 bytes  received 333 bytes  28,246,147.43 bytes/sec
total size is 99,118,943  speedup is 1.00

stgraber@castiana:~$ lxc exec xenial -- ls -lh /tmp/a/
total 95M
-rw-r--r-- 1 root root 8.3M Aug 19 20:28 IMG_3705.JPG
-rw-r--r-- 1 root root 7.3M Aug 19 21:06 IMG_3726.JPG
-rw-r--r-- 1 root root 5.6M Aug 20 18:09 IMG_3757.JPG
-rw-r--r-- 1 root root 8.9M Aug 20 19:05 IMG_3782.JPG
-rw-r--r-- 1 root root 6.8M Aug 20 19:09 IMG_3788.JPG
-rw-r--r-- 1 root root 5.9M Sep 22 18:10 IMG_3809.JPG
-rw-r--r-- 1 root root 8.1M Sep 23 00:24 IMG_3835.JPG
-rw-r--r-- 1 root root 8.0M Sep 23 00:38 IMG_3855.JPG
-rw-r--r-- 1 root root 5.3M Sep 23 00:50 IMG_3867.JPG
-rw-r--r-- 1 root root 3.4M Sep 23 01:48 IMG_3892.JPG
-rw-r--r-- 1 root root 5.3M Sep 23 01:51 IMG_3894.JPG
-rw-r--r-- 1 root root 5.2M Nov 10 06:43 IMG_3899.JPG
-rw-r--r-- 1 root root 6.9M Nov 10 06:47 IMG_3908.JPG
-rw-r--r-- 1 root root 5.2M Nov 10 06:50 IMG_3915.JPG
-rw-r--r-- 1 root root 5.1M Nov 10 20:53 IMG_3939.JPG
stgraber@castiana:~$
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