Error on restore

[albebert]

Hi,

my PBS is hosted on lxc on local proxmox instance.

All is working on site (backup/restore)

but on remote site trought vpn, backup is ok but restore fail :

Error: Operation not supported (os error 95)
TASK ERROR: unable to restore CT 103 - command '/usr/bin/proxmox-backup-client restore '--crypt-mode=none' ct/103/2020-08-16T21:53:55Z pct.conf - --repository backup@pbs@192.168.200.9S01-HT' failed: exit code 255

any idea ?

 

[t.lamprecht]

Hi,

what filesystem is used on the remote site?

Which version do you use? proxmox-backup-client version

 

[albebert]

Hi

on both local and remote proxmox : client version: 0.8.9

local Backup Server 0.8-9 BETA

storage is CIFS


backup / restore on local proxmox work great (so CIFS is not a problem, it's not the best choice i know, it's just for testing)

i've ALL TCP/UDP rules en my firewalls in both directions

 

[H4R0]

Hi

on both local and remote proxmox : client version: 0.8.9

local Backup Server 0.8-9 BETA

storage is CIFS


backup / restore on local proxmox work great (so CIFS is not a problem, it's not the best choice i know, it's just for testing)

i've ALL TCP/UDP rules en my firewalls in both directions

pve backups and pbs work different.

pbs does not support cifs.

 

[albebert]

pve backups and pbs work different.

pbs does not support cifs.

yes i know, i've tunned cifs mount in oder to work. When i said that it's work with local proxmox it means works trought pbs.

the only difference is that the remote proxmox have to transit in 2 firewall connect with a ipsec tunnel (fortigate local, sophos utm remote) both have firewall rules with ALL TCP/UDP between remote proxmox and local pbs

 

[albebert]

after lot of time, i'm trying new things :

PBS installed on local (just for test) on the problematic pve server, so no firewall or vpn, and same thing


so i mounted this PBS on my working PVE instance (so with vpn and firewalls) and all is working.

So we have a problem on this particular host.

i made a strace of restore command : https://pastebin.com/zpbxkjvF

if anyone have an idea..

 

[fabian]

openat(AT_FDCWD, "/tmp", O_RDWR|O_CLOEXEC|O_TMPFILE, 0666) = -1 EOPNOTSUPP (Operation not supported)

what is mounted on /tmp?

 

[albebert]

root@Proxmox-VE /var/log # df -h /tmp
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/vg0-tmp 5.0G 33M 5.0G 1% /tmp

 

[fabian]

and what file system is in use there? I think the expectation that is is possible to create a temporary file on /tmp is a valid one

 

[albebert]

/dev/vg0/tmp /tmp reiserfs defaults 0 0

don't know why i use reiserfs here ! (i think that is the default FS used by hetzner proxmox installation, a good idea because reiserfs is good for FS with lot of small files, and /tmp is generaly with plently of small files, but in my case i've only somes files from systemd ) but in this case seems to be a problem

unmount the tmp, test and voila ! it's working !

going to format in ext4 and give it a try

 

[fabian]

usually on modern distros /tmp is a (RAM-backed) tmpfs and not persistent at all...

 

[albebert]

yes, an hold habitude to do this

with ext4 all is working with "local" PBS.

Need to try with remote PBS (but think it work too)

thanks a lot for you help

edit : all is working with remote PBS ! good