Recently I had to rebuild a backuppc server I’ve inherited from previous admin. Running Ubuntu 14.04 server and Backuppc version 3.2.1 installed from repositories. The backups are stored on a Synology NAS (RS3413XS+ running DSM 4.3) which I’ve mounted using NFS.

If I mount the NAS (mount <NAS IP>:/volume5/LinuxBackups /var/lib/backuppc) I can see the backups on the NAS and can do a “touch test.txt” and modify contents so permissions seem ok. And the backuppc web GUI is accessible however I get the following error.

Error: Unable to connect to BackupPC server

This CGI script (/backuppc/index.cgi) is unable to connect to the BackupPC server on <Servername> port -1.
The error was: unix connect: Connection refused.
Perhaps the BackupPC server is not running or there is a configuration error. Please report this to your Sys Admin.

If I try and unmount the NAS I get error that mount is in use (makes sense) but when I try and stop backuppc I get another error

No process in pidfile '/var/run/backuppc/BackupPC.pid' found running; none killed.

A ps –eg | grep backuppc shows

username@servername~$ ps -ef | grep backuppc

backuppc 1874 1 0 16:26 ? 00:00:00 /usr/bin/perl /usr/share/backuppc/bin/BackupPC -d

backuppc 1877 1386 0 16:27 ? 00:00:00 /usr/bin/perl /usr/share/backuppc/lib/realindex.cgi

backuppc 1878 1386 0 16:27 ? 00:00:00 /usr/bin/perl /usr/share/backuppc/lib/realindex.cgi

backuppc 1884 1386 0 16:31 ? 00:00:00 /usr/bin/perl /usr/share/backuppc/lib/realindex.cgi

username  1947 1629  0 16:33 pts/0    00:00:00 grep --color=auto backuppc

If I kill all backuppc services then unmount the NAS and restart backuppc service and GUI works again as expected.

I have tried searching the backuppc documentation and googled fairly extensively however only hit I turned up with the above error was someone using a QNAP NAS on which the firmware had been updated. Also seeing several pointers to the Backuppc wiki but this does seems to only contain a couple of screenshots.....

So my question is – what is the correct procedure to mount an external NAS to the /var/lib/backuppc directory so that backuppc works as expected? Am I missing something obvious here?

Cheers Kiweegie

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