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Problem
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This manual is an extension of our general Checkmk backup article: |
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Problem
Basic information about mkbackup
After configuring the backup job in Webconf, a cronjob is created. This job can be inspected on the command line, after logging in via SSH as site user:
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OMD[cma]:~$ mkbackup --verbose --debug backup mybackup |
Collection of error messages
Failed to perform a backup: [Errno 104] Connection reset by peer
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2021-03-17 11:10:20 --- Starting backup (Check_MK_Appliance-test+stage+106-nfs+backup+appliance to nfs-backup-appliance) --- 2021-03-17 11:10:20 Performing system backup (system.tar) 2021-03-17 11:10:25 Performing system data backup (system-data.tar) 2021-03-17 11:10:48 Performing site backup: test Site backup failed: Failed to perform backup: [Errno 104] Connection reset by peer |
Solution
Find the correct backup job
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OMD[mysite]:~$ mkbackup jobs Job-ID Title ------------------------------------------------------------ myid mytitle OMD[mysite]:~$ |
Please run the backup directly on the command line and forward the output to a log file.
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OMD[mysite]:~$ omd -v backup --no-compression mybackup - >~/path/to/my_backup.txt |
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Pausing RRD updates for /omd/sites/testmysite/var/pnp4nagios/perfdata/SAP01myhost/DRBD_drbd3my_disk_read.rrd rrdcached command: SUSPEND /omd/sites/testmysite/var/pnp4nagios/perfdata/SAP01myhost/DRBDmy_drbd3_disk_read.rrd rrdcached response: '-1 /omd/sites/testmysite/var/pnp4nagios/perfdata/SAP01myhost/DRBD_drbd3my_disk_read.rrd - No such file or directory\n' Resuming RRD updates for /omd/sites/testmysite/var/pnp4nagios/perfdata/SAP01myhost/DRBDmy_drbd3_disk_read.rrd rrdcached command: RESUME /omd/sites/testmysite/var/pnp4nagios/perfdata/SAP01myhost/DRBDmy_drbd3_disk_read.rrd skipping rrdcached command (broken pipe) Pausing RRD updates for /omd/sites/testmysite/var/pnp4nagios/perfdata/SAP01myhost/DRBDmy_drbd3_disk_write.rrd rrdcached command: SUSPEND /omd/sites/testmysite/var/pnp4nagios/perfdata/SAP01myhost/DRBDmy_drbd3_disk_write.rrd rrdcached response: '-1 /omd/sites/testmysite/var/pnp4nagios/perfdata/SAP01myhost/DRBD_drbd3my_disk_write.rrd - No such file or directory\n' Resuming RRD updates for /omd/sites/testmysite/var/pnp4nagios/perfdata/SAP01myhost/DRBDmy_drbd3_disk_write.rrd rrdcached command: RESUME /omd/sites/testmysite/var/pnp4nagios/perfdata/SAP01myhost/DRBDmy_drbd3_disk_write.rrd Failed to perform backup: [Errno 104] Connection reset by peer |
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Here it looks like Checkmk is using pnp4nagios instead of Round Robin Database (RRD). We recommend converting the performance data to the RRD format. Please follow the steps described here: https://docs.checkmk.com/latest/en/graphing.html#customise_rrds Customizing the RRD structure
Don't forget to stop the site before converting the files!
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Now the backup should run without any errors.
UnicodeEncodeError: 'utf-8' codec can't encode character '\udcc3' in position 122: surrogates not allowed
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Job state: Site mysite Backup
#############################################
Site backup
State Failed
Runtime Started at 2022-06-21 03:00:02, Finished at 2022-06-21 03:00:02 (Duration: 0:16:36)
Output
2022-06-21 03:00:02 — Starting backup (Check_MK-mysite+cmk2-mysite-mysite+bak to Reload) —
2022-06-21 03:00:02 Found previous incomplete backup. Cleaning up those files.
Site backup failed: Traceback (most recent call last):
File "/omd/sites/mysite/bin/omd", line 60, in <module>
omdlib.main.main()
File "/omd/versions/2.0.0p23.cee/lib/python3/omdlib/main.py", line 4022, in main
command.handler(version_info, site, global_opts, args, command_options)
File "/omd/versions/2.0.0p23.cee/lib/python3/omdlib/main.py", line 2753, in main_backup
omdlib.backup.backup_site_to_tarfile(site, fh, tar_mode, options, global_opts.verbose)
File "/omd/versions/2.0.0p23.cee/lib/python3/omdlib/backup.py", line 54, in backup_site_to_tarfile
_backup_site_files_to_tarfile(site, tar, options)
File "/omd/versions/2.0.0p23.cee/lib/python3/omdlib/backup.py", line 112, in _backup_site_files_to_tarfile
tar.add(site.dir, site.name, filter=filter_files)
File "/omd/versions/2.0.0p23.cee/lib/python3/omdlib/backup.py", line 134, in add
super(BackupTarFile, self).add(name, arcname, recursive, filter=filter)
File "/omd/versions/2.0.0p23.cee/lib/python3.8/tarfile.py", line 1977, in add
self.add(os.path.join(name, f), os.path.join(arcname, f),
File "/omd/versions/2.0.0p23.cee/lib/python3/omdlib/backup.py", line 134, in add
super(BackupTarFile, self).add(name, arcname, recursive, filter=filter)
File "/omd/versions/2.0.0p23.cee/lib/python3.8/tarfile.py", line 1977, in add
self.add(os.path.join(name, f), os.path.join(arcname, f),
File "/omd/versions/2.0.0p23.cee/lib/python3/omdlib/backup.py", line 134, in add
super(BackupTarFile, self).add(name, arcname, recursive, filter=filter)
File "/omd/versions/2.0.0p23.cee/lib/python3.8/tarfile.py", line 1977, in add
self.add(os.path.join(name, f), os.path.join(arcname, f),
File "/omd/versions/2.0.0p23.cee/lib/python3/omdlib/backup.py", line 134, in add
super(BackupTarFile, self).add(name, arcname, recursive, filter=filter)
File "/omd/versions/2.0.0p23.cee/lib/python3.8/tarfile.py", line 1977, in add
self.add(os.path.join(name, f), os.path.join(arcname, f),
File "/omd/versions/2.0.0p23.cee/lib/python3/omdlib/backup.py", line 134, in add
super(BackupTarFile, self).add(name, arcname, recursive, filter=filter)
File "/omd/versions/2.0.0p23.cee/lib/python3.8/tarfile.py", line 1977, in add
self.add(os.path.join(name, f), os.path.join(arcname, f),
File "/omd/versions/2.0.0p23.cee/lib/python3/omdlib/backup.py", line 134, in add
super(BackupTarFile, self).add(name, arcname, recursive, filter=filter)
File "/omd/versions/2.0.0p23.cee/lib/python3.8/tarfile.py", line 1971, in add
self.addfile(tarinfo, f)
File "/omd/versions/2.0.0p23.cee/lib/python3/omdlib/backup.py", line 158, in addfile
self._suspend_rrd_update(rrd_file_path)
File "/omd/versions/2.0.0p23.cee/lib/python3/omdlib/backup.py", line 169, in _suspend_rrd_update
self._send_rrdcached_command("SUSPEND %s" % path)
File "/omd/versions/2.0.0p23.cee/lib/python3/omdlib/backup.py", line 199, in _send_rrdcached_command
self._sock.sendall(("%s\n" % cmd).encode("utf-8"))
UnicodeEncodeError: 'utf-8' codec can't encode character '\udcc3' in position 122: surrogates not allowed |
Solution
Please run the backup directly on the command line and forward the output to a log file.
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This issue is that this file contains a non-ascii character at the end. "AUTORIT�.rrd"
To correct this, we must delete or rename this file. The safest solution would be to rename it.
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OMD[mysite]:~$ mv oldfilename newfilename |
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