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====Backup a Linux host through rsync====
To configure a Linux host client to be backed up, configure SSH from the backup server as follows in order to exchange certificates and to perform a login without passwords.
At the BackupPC server command line as root:
su -s /bin/bash backuppc
ssh-keygen -t rsa -b 2048 # use a blank passphrase
exit
Assuming SSH access to the remote host to be backed up is already configured, as root:
su -s /bin/bash backuppc
ssh-copy-id -i ~backuppc/.ssh/id_rsa.pub root@your.host.name
exit
You can test the key exchange:
su -s /bin/bash backuppc #become backuppc user
ssh -l root your.host.name # add "-p 2222" for port 2222
exit #from the remote_host
exit #from the backuppc user back to root
You should be able to log in without a password.
Note: There are times when the backuppc user needs a real shell specified in /etc/passwd, for example, when the backuppc user is used to run sudo commands or pre/post scripts.<br />
Now you can go to the admin backuppc panel to set your host<br />
====Backup a Windows Client with rsync====
To configure a Windows client to be backed up via rsync, install rsync on the Windows client. rysnc needs to be running as a service on the Windows client to ensure communication.
There are several options/versions of rsync – the first I was able to get working was from http://sourceforge.net/projects/backuppc/files/cygwin-rsyncd/2.6.8_0/
The zip file contains 7 files – the site goes into more detail about each of the files. Depending on how you wish to use BackupPC will determine which files to edit.
I use rsync without ssh keys – to do so create a local user with sufficient rights to the directory or directories on the Windows client, then edit the file rsync.secrets to include the UserID & Password. You then use that same UserID & Password within the configuration from the BackupPC webpage – where you chose to back-up the client with Samba, rsync etc. The contents of rsync.secrets file is simply:
UserID:Password
You will have to create a “Cygwin share” on the Windows box – that is done using the rsync.conf file. The “Cygwin share” is the name you choose within the square brackets. My rsync.conf file with a share name of “cdocs” (after removal of all personal information of course) looks like this:
[cdocs]
path = c:/User
comment = c: Drive documents
auth users = <valid-back-up-user>
secrets file = c:/rsyncd/rsyncd.secrets
hosts allow = 192.168.1.1
strict modes = false
read only = true
list = false
We have share name (cdocs), path, the valid user created on the Windows client, the path to the rysnc.secrets file, an allowable host (this being the local backup server IP), modes, read only and list. The options are mostly explained in the file – what it doesn’t show is that if you have a different version of rsync, the rsync.conf file looks a bit different. This one is for rsync 3.0.9
[cdocs]
Path = /cygdrive/c/Users/<USERNAME>
comment = c: User Data
strict modes = false
auth users = <valid-back-up-user>
secrets file = c:/rsyncd/rsyncd.secrets
hosts allow = 192.168.1.1
read only = false
list = false
The final thing that must happen to make rsync work properly is to load rysnc as a service on the Windows client. The file service.bat shows the following command to accomplish this:
c:/rsyncd/rsync.exe -a "--config=c:/rsyncd/rsyncd.conf --daemon --no-detach"
There is also a “gotcha” – sometimes port 873 is blocked by Windows Firewall, so you may need to fix that.
====Remove backups====
*Remove all backups of a client
rm -rf /var/lib/BackupPC/pc/<client>/
sudo -u backuppc /usr/share/BackupPC/bin/BackupPC_serverMesg BackupPC_nightly run
*Remove One backup of a client
cd /var/lib/BackupPC/pc/<client>/
ls
rm -fR <backup_number>
sudo -u backuppc /usr/share/BackupPC/bin/BackupPC_serverMesg BackupPC_nightly run
{{warning box|
Removing a single backup must be done with extreme care. You can safly remove the last backup for example, but if you remove a backup on which another one is based on, you can screw up your backups
}}
After this, you will see space reclaimed and you can check it with df, but you still need to remove statistic line, otherwise you will see it in your web interface. To do that:
nano /var/lib/BackupPC/pc/<client>/backups
With ctrl+k you can remove the line with <backup_number>.
Relog to your web interface and voila! No more <backup_number>.
===Known Issues===
* When restarting the BackupPC service you may receive the error as indicated below :<br />
'''
[root@backuppc ~]# service backuppc restart<br />
Shutting down BackupPC: [ OK ]
Starting BackupPC: [ OK ]
'''BackupPC: WARNING: Your BackupPC $Conf{TopDir} is not listed in the locate
BackupPC: database configuration's PRUNEPATHS. This may cause all of your
BackupPC: backed up files to be indexed!'''
'''To remove the warning''' <br />
you should create a custom template '''/etc/e-smith/templates-custom/etc/updatedb.conf/10conf''' (copy the default /etc/e-smith/templates/etc/updatedb.conf/10conf)<br />
mkdir -p /etc/e-smith/templates-custom/etc/updatedb.conf/
cp /etc/e-smith/templates/etc/updatedb.conf/10conf /etc/e-smith/templates-custom/etc/updatedb.conf/
add the directory /var/lib/BackupPC to the PRUNEPATHS list, then
expand-template /etc/updatedb.conf
* “aborted by signal=PIPE”
Sometime the backup fails with this error, this error is related to the remote ssh service. You must set in the /etc/ssh/ssh_config of your remote host
ServerAliveInterval 120
then restart your ssh service
One other way could be to set in the setting of backupPC (RsyncClientCmd)the default value for all hosts
$Conf{RsyncClientCmd} = '$sshPath -o ServerAliveInterval=120 -q -x -l root $host $rsyncPath $argList+';
* trying backing up a SME Server you might encounter error or timeout on ssh, this is because of the AutoBlock fucntion on sshd
config setprop sshd AutoBlock disabled
signal-event remoteaccess-update
=== Désinstaller ===
=== Désinstaller ===
