[Bug 1888685] Re: rsync fails after installing level 3.2.1

Tue Jul 28 06:07:59 UTC 2020

Thanks Cliff!
Note: the server question you wondered would have been the details how exactly (commands&config( you do "syncd is enabled and started at boot with the rsyncd.conf". Because in that might lay the details we need.

I was setting up a server on my own aligned to your config.
The following makes it easy for everyone to try to re-create as it is just copy&paste to get it working - it will work on a fresh install of any Ubuntu with rsync installed.

Summary:
Host   20.10 - Rsync 3.2.1
Client 20.04 - Rsync 3.1.3

#1 Setup on the Host to prep, config and debug-start rsyncd as demon:

# Something to sync
mkdir /mnt/testrsync
touch /mnt/testrsync/testfile
mkdir /mnt/testrsync/testdir
touch /mnt/testrsync/testdir/testfile2

# Config
cat << EOF > /etc/rsyncd.conf
pid file = /var/run/rsyncd.pid
lock file = /var/run/rsync.lock

[test_dir]
path = /mnt/testrsync
comment = Test Directory
uid = ubuntu
gid = ubuntu
read only = no
list = yes
hosts allow = 10.253.194.0/24
auth users = ubuntu
secrets file = /etc/rsyncd.scrt
strict modes = false
EOF
cat << EOF > /etc/rsyncd.scrt
ubuntu:ubuntu
EOF

# Start with max debug in local console
rsync -vv --daemon --config /etc/rsyncd.conf --no-detach

#2 Then on the client try to connect

mkdir /mnt/client
export RSYNC_PASSWORD=ubuntu
rsync -vurptC rsync://ubuntu@10.253.194.39/test_dir /mnt/client
receiving incremental file list
./
testfile
testdir/
testdir/testfile2

sent 77 bytes  received 218 bytes  590.00 bytes/sec
total size is 0  speedup is 0.00

Works just fine, at the same time the server says:

$ rsync -vv --daemon --config /etc/rsyncd.conf --no-detach --log-file=/dev/stdout
2020/07/28 05:55:52 [7940] rsyncd version 3.2.1 starting, listening on port 873
2020/07/28 05:56:21 [7942] connect from f.lxd (10.253.194.30)
2020/07/28 05:56:21 [7942] rsync allowed access on module test_dir from f.lxd (10.253.194.30)

In my case (just like in yours) it recognizes the configured module "test_dir" in my case "Bin_dir" in yours. From there it finds all the content and syncs it.

Your error suggests a chroot issue that I can't reproduce even with that setup close to yours.
I added "use chroot = yes" to the daemon config but it behaves the same.

Might on your upgrade anything else have changed that influences this -
like under which user the daemon runs?

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https://bugs.launchpad.net/bugs/1888685

Title:
  rsync fails after installing level 3.2.1

Status in rsync package in Ubuntu:
  Incomplete

Bug description:
  After installation of rsync.3.2.1 my attempt to sync fails with chroot
  error.  The rsyncd.log indicates that rsync can't find the directories
  I want to sync.

  2020/07/18 10:01:20 [3689] rsyncd version 3.2.1 starting, listening on port 873
  2020/07/18 11:00:01 [5786] name lookup failed for 192.168.1.159: Name or service not known
  2020/07/18 11:00:01 [5786] connect from UNKNOWN (192.168.1.159)
  2020/07/18 11:00:01 [5786] rsync allowed access on module Bin_dir from UNKNOWN (192.168.1.159)
  2020/07/18 11:00:01 [5786] rsync: [Receiver] chroot /home/cliff/Bin failed: No such file or directory (2)
  2020/07/18 11:00:01 [5794] name lookup failed for 192.168.1.159: Name or service not known
  2020/07/18 11:00:01 [5794] connect from UNKNOWN (192.168.1.159)
  2020/07/18 11:00:01 [5794] rsync allowed access on module Bin_dir from UNKNOWN (192.168.1.159)
  2020/07/18 11:00:01 [5794] rsync: [Receiver] chroot /home/cliff/Bin failed: No such file or directory (2)
  2020/07/18 11:00:01 [5795] name lookup failed for 192.168.1.159: Name or service not known
  2020/07/18 11:00:01 [5795] connect from UNKNOWN (192.168.1.159)
  2020/07/18 11:00:01 [5795] rsync allowed access on module Drawings_dir from UNKNOWN (192.168.1.159)
  2020/07/18 11:00:01 [5795] rsync: [Receiver] chroot /home/cliff/Drawings failed: No such file or directory (2)

  Dropping back to Ubuntu 20.04 and rsync works again.  The rsync update
  was install 7/18.

  ProblemType: Bug
  DistroRelease: Ubuntu 20.10
  Package: rsync 3.2.1-1ubuntu2
  ProcVersionSignature: Ubuntu 5.4.0-26.30-generic 5.4.30
  Uname: Linux 5.4.0-26-generic x86_64
  ApportVersion: 2.20.11-0ubuntu42
  Architecture: amd64
  CasperMD5CheckResult: skip
  CurrentDesktop: ubuntu:GNOME
  Date: Thu Jul 23 10:28:17 2020
  InstallationDate: Installed on 2020-07-06 (16 days ago)
  InstallationMedia: Ubuntu 20.10 "Groovy Gorilla" - Alpha amd64 (20200609)
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: rsync
  UpgradeStatus: No upgrade log present (probably fresh install)
  mtime.conffile..etc.default.rsync: 2020-07-06T11:31:56.141217

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