Are you sure that BackupPC is compatible with sshfs? While v4 drastically reduces number of hard links by eliminating the hard-link pool scheme, it still uses hard links for *temporary* atomic renames. See: http://backuppc.sourceforge.net/BackupPC-4.2.1.html
Sshfs may have other limitations as it is not a full-fledged filesystem... Sandro Bordacchini wrote at about 15:01:35 +0200 on Friday, September 2, 2022: > Hello all. > > Just wanted to share with you what happened to me and check if you have any > idea on what is going on. > I have been a satisfied user of backuppc for a long time. So far I am using > a 3.3.0 version on a debian 7 on a local vm (a local vmware esxi i have > full control on): no problem with this approach. > > I needed to switch to a cloud solution, though. > > No need to migrate the pool. I thought about installing backuppc v4 and > just starting from that, adding my old hosts (to avoid v3/v4 pool version > issues) > My pool is 0.7 TB so to keep the budget low I planned to buy a low-middle > sized vm plus some "cloud storage space". > I read that hardlinks support is no longer strictly mandatory (but it can > affect performance) on v4 so I was about to give it a try. I hope I > understood this crucial point correctly. > > So i installed backuppc 4.4.0-3 (standard repo version on debian 11) > I mounted the cloud space with sshfs as user backuppc, this are the options > in the fstab line: > > idmap=user,allow_other,default_permissions,IdentityFile=/root/.ssh/<privatekey>,port=23,ServerAliveInterval=15,reconnect,_netdev,uid=108,gid=114 > > uid and gid are backuppc user and group > I got a working installation and I tried a successful backup (full and > incr) of localhost (tar method), with no errors. > > Then I tried to add some remote linux servers (rsync over ssh method) and I > got several transfer errors... very similar across all the servers... for > example a sample from xferLOG: > > [...] > This is the rsync child about to exec /usr/libexec/backuppc-rsync/rsync_bpc > Xfer PIDs are now 39411,39414 > xferPids 39411,39414 > G bpc_path_create: can't create f%2fetc%2f/attrib (errno 2) > G bpc_path_create: can't create f%2fetc%2f/attrib (errno 2) > => [lots of repeated lines] > rsync_bpc: recv_generator: mkdir "/NetworkManager" failed: No such file or > directory (2) > *** Skipping any contents from this failed directory *** > G bpc_path_create: can't create f%2fetc%2f/fX11 (errno 2) > G bpc_path_create: can't create f%2fetc%2f/fX11 (errno 2) > rsync_bpc: recv_generator: mkdir "/X11/xkb" failed: No such file or > directory (2) > *** Skipping any contents from this failed directory *** > G bpc_path_create: can't create f%2fetc%2f/facpi (errno 2) > G bpc_path_create: can't create f%2fetc%2f/facpi (errno 2) > rsync_bpc: recv_generator: mkdir "/acpi/events" failed: No such file or > directory (2) > *** Skipping any contents from this failed directory *** > G bpc_fileReadAll: can't open > /var/lib/backuppc/cpool/36/16/37170a6409f1fa9cf67d20660b1d0f2d (from > alternatives/ALTER_OPERATOR_CLASS.7.gz) > rsync_bpc: symlink "/alternatives/ALTER_OPERATOR_CLASS.7.gz" -> > "/usr/share/postgresql/13/man/man7/ALTER_OPERATOR_CLASS.7.gz" failed: File > exists (17) > rsync_bpc: symlink "/alternatives/ALTER_OPERATOR_FAMILY.7.gz" -> > "/usr/share/postgresql/13/man/man7/ALTER_OPERATOR_FAMILY.7.gz" failed: File > exists (17) > G bpc_fileReadAll: can't open > /var/lib/backuppc/cpool/e2/48/e34810c68ce29a133fbc30d73c6ad6a0 (from > alternatives/ALTER_TABLESPACE.7.gz) > [...] > > All the remote servers i added so far (all debian servers) got several > errors and if i try to browse their backups, the web interface tells me > they are empty. > > My main concern is: why the backup with tar method is working and the other > with rsync is not? > If it was something about the pool filesystem ... should not affect all the > backups? > Is something about the options i mount the sshfs filesystem? Should I set > write syncs? > Seeing the log someone could argue user backuppc has no rw access but i can > tell you that backuppc created a lot of files and folders in that fs. > > Thank you in advance. > S > _______________________________________________ > BackupPC-users mailing list > BackupPC-users@lists.sourceforge.net > List: https://lists.sourceforge.net/lists/listinfo/backuppc-users > Wiki: https://github.com/backuppc/backuppc/wiki > Project: https://backuppc.github.io/backuppc/ _______________________________________________ BackupPC-users mailing list BackupPC-users@lists.sourceforge.net List: https://lists.sourceforge.net/lists/listinfo/backuppc-users Wiki: https://github.com/backuppc/backuppc/wiki Project: https://backuppc.github.io/backuppc/
