BackupPC working on ReadyNAS 2100

hmmm people are viewing this post, but no reactions ... don't think this is a good sign ;-)
anyway ... this is how I backup multiple user accounts on a mac mini with backuppc using tar over ssh.
For sure there will be improvements possible!

Setup: Mac mini ip address 192.168.2.238 with multiple users like admin, bart, …

! before you start, go in your mac his/hers system preferences -> sharing -> activate external logins for all users. otherwise you get ‚ssh: connect to host 192.168.2.238 port 22: Connection refused’ !

on client (macmini in this case)
log in as the user that you want to backup (in this example 'admin'), type in a clean terminal window :

(if the .ssh dir doesn’t exist)
-> Mac-mini-van-admin:~ admin$ mkdir ~/.ssh

Mac-mini-van-admin:~ admin$ cd ~/.ssh
Mac-mini-van-admin:~ admin$ ssh-keygen -t rsa

->
Generating public/private rsa key pair.
Enter file in which to save the key (/Users/admin/.ssh/id_rsa):
-> hit 3 times enter (= empty passphrase)
->
Your identification has been saved in /Users/admin/.ssh/id_rsa.
Your public key has been saved in /Users/admin/.ssh/id_rsa.pub.
…
to recognize which file belongs to who, I use a combination from the hardware and the user: macmini_admin_id_rsa

Mac-mini-van-admin:.ssh admin$ cp ./id_rsa.pub ./macmini_admin_id_rsa.pub

on server
open a new terminal window and type:

Mac-mini-van-admin:~ admin$ ssh backuppc@192.168.3.101

…
Are you sure you want to continue connecting (yes/no)? yes
…
backuppc@192.168.3.101's password:
-> type the requested password

backuppc@nas_zolder:~$  mkdir ~/.ssh
backuppc@nas_zolder:~$  cd .ssh
backuppc@nas_zolder:~/.ssh$ ssh-keygen -t rsa

…
Enter file in which to save the key (/home/backuppc/.ssh/id_rsa):
-> hit 3 times enter (= empty passphrase)

to recognize the pub file belongs to the readynas:

Mac-mini-van-admin:.ssh admin$ cp ./id_rsa.pub ./nas_zolder_backuppc_id_rsa.pub

on client
copy the public key from the NAS by means of a secure copy (scp)

Mac-mini-van-admin:.ssh admin$ scp backuppc@192.168.3.101://home/backuppc/.ssh/nas_zolder_backuppc_id_rsa.pub .

-> type password

check if copy went ok

Mac-mini-van-admin:.ssh admin$ ls -a -l

-> you should see nas_zolder_backuppc_id_rsa.pub

add the NAS key to the authorized keys:

Mac-mini-van-admin:.ssh admin$ cat ./nas_zolder_backuppc_id_rsa.pub >> ~/.ssh/authorized_keys

on server
do the same as on the client, my client has ip address 192.168.2.238, user admin

backuppc@nas_zolder:~/.ssh$ scp admin@192.168.2.238:/Users/admin/.ssh/macmini_admin_id_rsa.pub .

-> password

check if copy went ok

backuppc@nas_zolder:~/.ssh$ ls -a -l

-> you should see the file ‚macmini_admin_id_rsa.pub’

add the client with this user login to the known hosts

backuppc@nas_zolder:~/.ssh$ touch known_hosts
backuppc@nas_zolder:~/.ssh$ cat ./macmini_admin_id_rsa.pub >> ~/.ssh/known_hosts

check if it ssh working:

backuppc@nas_zolder:~/.ssh$ ssh -l admin 192.168.2.238 whoami

goal is that you don’t have to type a password and that you immediately see your login name ‚admin’ in this case.

if you need to type your password, try verbose logging with the -v option

backuppc@nas_zolder:~/.ssh$ ssh -v -l admin 192.168.2.238 whoami

If you need to add additional users on the same computer a shorter version is applicable:

on client

login as that user (or by means of su)

bash-3.2$ cd ~/.ssh

if this dir is not existing: mkdir ~/.ssh and than cd ~/.ssh

bash-3.2$ ssh-keygen -t rsa

-> hit 3 times enter (= empty passphrase)

to recognize which file belongs to who

bash-3.2$ cp ./id_rsa.pub ./macmini_bart_id_rsa.pub

copy the public key from the NAS by means of a secure copy (scp)

bash-3.2$ scp backuppc@192.168.3.101://home/backuppc/.ssh/nas_zolder_backuppc_id_rsa.pub .

-> type password and say that you want to connect.

bash-3.2$ cat ./nas_zolder_backuppc_id_rsa.pub >> ~/.ssh/authorized_keys

on server
in the next path the user admin should be replaced on 3 spots!!

backuppc@nas_zolder:~/.ssh$ scp bart@192.168.2.238:/Users/bart/.ssh/macmini_bart_id_rsa.pub .

-> file should come over

backuppc@nas_zolder:~/.ssh$ cat ./macmini_bart_id_rsa.pub >> ~/.ssh/known_hosts 

check:

backuppc@nas_zolder:~/.ssh$ ssh -l bart 192.168.2.238 whoami  

should give you ‚bart’




If this is done, the hard part is over. The only thing that’s left is the configuration of the client in the backuppc admin interface (of config file)

-> configuring backuppc for mac clients copying over tar:
Xfermethod = tar
Tarsharename = -> insert the tar share: / (just the basic root slash)
BackupFilesOnly
-> add a new key: /
-> insert the path: /Users/admin
in the same way you can exclude directories with BackupFilesExclude: Key is the tar share = / -> Insert the did you want to exclude like ‚/Users/admin/Library/Caches/Metadata/Safari/History/‚

tarclientpath: /usr/bin/tar
tarclientcmd: $sshPath -q -x -l admin $host $tarPath -c -v -f - -C $shareName+ --totals
-> I used the user his name explicitly in the tarclientcmd ...