Backuppc installation and configuration - Got fatal error during xfer (Unable to read 4 bytes)

poly_s · 02-26-2020, 08:49 PM

Good Day

Im trying to get backuppc running on raspbian with a raid so i can backup a couple of laptops on the home network.

Unfortunately having made the install and from the browser interface when i run a backup it pings sucessfully however soon fails with "Got fatal error during xfer (Unable to read 4 bytes)"

Im thinking i have not understood something and have a configuration wrong.

here is the process i went through to install.

Get raspbian going

Write img to sdisk

touch ssh on boot

Create Raid

Code:

Sudo apt-get install mdadm
Sudo blkid
sudo mdadm --create --verbose /dev/md0 --level=mirror --raid-devices=2 /dev/sda /dev/sdb
cat /proc/mdstat
sudo -i
mdadm --detail --scan >> /etc/mdadm/mdadm.conf
exit
sudo mkfs.ext4 -v -m .1 -b 4096 -E stride=32,stripe-width=64 /dev/md0

sudo mount /dev/md0 /mnt
sudo blkid

copy the UUID

Code:

sudo cp /etc/fstab /etc/fstab.bak
sudo nano /etc/fstab

edit and add - UUID=[your_uuid] /mnt ext4 defaults 0 0

Install rsync-bpc

Code:

sudo apt-get install libacl1-dev
wget https://github.com/backuppc/rsync-bpc/releases/download/3.1.2.1/rsync-bpc-3.1.2.1.tar.gz
tar xvzf rsync-bpc-3.1.2.1.tar.gz
cd rsync-bpc-3.1.2.1
./configure
make
sudo make install

Install BackupPC-XS

Code:

 wget https://github.com/backuppc/backuppc-xs/releases/download/0.59/BackupPC-XS-0.59.tar.gz
tar xvzf BackupPC-XS-0.59.tar.gz
cd BackupPC-XS-0.59/
perl Makefile.PL
   make
   make test
   make install

Install backuppc

Code:

Sudo apt-get install backuppc

Set up SSH certs

Code:

sudo su - backuppc

ssh-keygen
ssh-copy-id julie@192.168.1.103
ssh julie@192.168.1.103

Wrangle Rsync on MAC book

Code:

/Library/LaunchDaemons/org.samba.rsync.plist

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN"
 "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
        <key>Disabled</key>
        <false/>
        <key>Label</key>
        <string>org.samba.rsync</string>
        <key>Program</key>
        <string>/usr/bin/rsync</string>
        <key>ProgramArguments</key>
        <array>
                <string>/usr/bin/rsync</string>
                <string>--daemon</string>
                <string>--config=/etc/rsync/rsyncd.conf</string>
        </array>
        <key>inetdCompatibility</key>
        <dict>
                <key>Wait</key>
                <false/>
        </dict>
                <key>Sockets</key>
                <dict>
                        <key>Listeners</key>
                        <dict>
                                <key>SockServiceName</key>
                                <string>rsync</string>
                                <key>SockType</key>
                                <string>stream</string>
                        </dict>
                </dict>
</dict>
</plist>

Code:

/etc/rsync/rsyncd.conf as specified in the previous XML configuration file:
pid file = /var/run/rsyncd.pid
*
motd=/etc/rsync/rsyncd.motd
uid = nobody
gid = nobody
use chroot = yes
max connections = 5
syslog facility = local5
*
[julie]
 path = /Users/julie
 comment = julies's Home
 uid = julie
 gid = admin
 list = yes
 read only = yes
 auth users = backuppc
 secrets file = /etc/rsync/rsyncd.secrets
 hosts allow = 192.168.1.0/24 1000:10:10::/64

Do you see a blinding error?

is it a permissions issue.

Thank in advance

Plankt0n · 03-26-2020, 04:55 AM

Can you try to SSH to the client you want to backup from the backuppc server? Does it ask you to verify the key? If it does and work fine, can you try to do the backup job again after that? I also had these issues and was told it could be related to the fingerprint message that you need to manually accept once. I however gave up on backuppc and ran with Bareos (bacula fork) instead.

Edit: oh and do the ssh from the backuppc user not root!