Backing up with Amanda on NSLU2

Backing up with Amanda on NSLU2
	Part I. Miscellaneous subjects (and those still to be sorted)

Procedure 9. Installing Amanda

Install both server and client

apprentice@slug:~$ apt-get install amanda-server amanda-client apt-get autoremove

Procedure 10. Backing up a local directory

Creating some dirs
Create directories /home/amanda/slug and deeper, to this effect:
apprentice@host:~$ root@slug:# tree /home/amanda/slug/ /home/amanda/slug/ |-- holding |-- state |-- log -- vtapes |-- data -> slot0 |-- slot0 |-- slot1 |-- slot10 |-- slot2 |-- slot3 |-- slot4 |-- slot5 |-- slot6 |-- slot7 |-- slot8 |-- slot9 -- state 16 directories, 1 file
All these should be owned by the amanda user(, backup in my case).

Create configuration files

Create /etc/amanda/slug-itself/amanda.conf:

org "slug"
infofile "/home/amanda/slug/state/curinfo"
logdir "/home/amanda/slug/state/log"
indexdir "/home/amanda/slug/state/index"
dumpuser "root"

tpchanger "chg-disk:/home/amanda/slug/vtapes"
property "num-slot" "10"
property "auto-create-slot" "yes"
property "removable" "no"
property "mount" "no"
property "umount" "no"
labelstr "slug[0-9][0-9]"
autolabel "slug%%" EMPTY VOLUME_ERROR

tapetype "TEST-TAPE"
define tapetype TEST-TAPE {
  length 100 mbytes
  filemark 4 kbytes
}

define dumptype simple-gnutar-local {
    auth "local"
    compress none
    program "GNUTAR"
}

holdingdisk hd1 {
    directory "/home/amanda/slug/holding"
    use 50 mbytes
    chunksize 1 mbyte
}

... and /etc/amanda/slug-itself/disklist:

localhost /etc simple-gnutar-local

Test the configuration

root@slug:# amcheck slug-itself Amanda Tape Server Host Check ----------------------------- Holding disk /home/amanda/slug/holding: 820539392 kB disk space available, using 51200 kB as requested found in slot 0: volume 'slug01' slot 0: volume 'slug01' is still active and cannot be overwritten found in slot 1: contains an empty volume slot 1: contains an empty volume Will write label 'slug02' to new volume in slot 1. NOTE: skipping tape-writable test Server check took 15.310 seconds Amanda Backup Client Hosts Check -------------------------------- Client check: 1 host checked in 6.227 seconds. 0 problems found. (brought to you by Amanda 3.3.1)
Actually run the backup
Now we should be able to back up /etc:
root@slug:# amdump slug-itself && echo success success
But when there is no 'tape', the exit status will still be zero, but nothing will have been backed up, so be sure to check:
root@slug:# amreport slug-itself Hostname: slug Org : slug Config : slug-itself Date : December 30, 2012 These dumps were to tape slug01. The next tape Amanda expects to use is: 1 new tape. STATISTICS: Total Full Incr. Level:# -------- -------- -------- -------- Estimate Time (hrs:min) 0:00 Run Time (hrs:min) 0:01 Dump Time (hrs:min) 0:00 0:00 0:00 Output Size (meg) 2.4 2.4 0.0 Original Size (meg) 2.4 2.4 0.0 Avg Compressed Size (%) 100.0 100.0 -- DLEs Dumped 1 1 0 Avg Dump Rate (k/s) 224.2 224.2 -- Tape Time (hrs:min) 0:00 0:00 0:00 Tape Size (meg) 2.4 2.4 0.0 Tape Used (%) 2.4 2.4 0.0 DLEs Taped 1 1 0 Parts Taped 1 1 0 Avg Tp Write Rate (k/s) 1230.0 1230.0 -- USAGE BY TAPE: Label Time Size % DLEs Parts slug01 0:00 2460k 2.4 1 1 NOTES: planner: Adding new disk localhost:/etc. taper: Slot 0 without label can be labeled taper: tape slug01 kb 2460 fm 1 [OK] DUMP SUMMARY: DUMPER STATS TAPER STATS HOSTNAME DISK L ORIG-kB OUT-kB COMP% MMM:SS KB/s MMM:SS KB/s -------------------------- ------------------------------------- ------------- localhost /etc 0 2460 2460 -- 0:11 224.2 0:02 1230.0 (brought to you by Amanda version 3.3.1)

Procedure 11. Backing up a remote PC

Create Amanda's working dirs

root@slug:# mkdir -p /home/amanda/remotepc/holding /home/amanda/remotepc/state/{curinfo,index,log} ; for (( i = 0; i <= 10 ; i++)) ; do mkdir -p /home/amanda/remotepc/vtapes/slot$i ; done root@slug:# chown -R backup:backup /home/amanda/remotepc/

Create Amanda config

/etc/amanda/remotepc/amanda.conf

org "remotepc"
infofile "/home/amanda/remotepc/state/curinfo"
logdir "/home/amanda/remotepc/state/log"
indexdir "/home/amanda/remotepc/state/index"
dumpuser "root"

tpchanger "chg-disk:/home/amanda/remotepc/vtapes"
property "num-slot" "10"
property "auto-create-slot" "yes"
property "removable" "no"
property "mount" "no"
property "umount" "no"
labelstr "remotepc[0-9][0-9]"
autolabel "remotepc%%" EMPTY VOLUME_ERROR

tapetype "STD-TAPE"
define tapetype STD-TAPE {
  length 2 gbytes
  filemark 4 kbytes
}

define dumptype simple-gnutar-remote {
    auth "ssh"
    ssh_keys "/home/amanda/remotepc/.ssh/id_rsa"
    compress none
    program "GNUTAR"
}

holdingdisk hd1 {
    directory "/home/amanda/remotepc/holding"
    use 50 mbytes
    chunksize 1 mbyte
}

/etc/amanda/remotepc/disklist

192.168.113.222 /etc simple-gnutar-remote

Set up SSH for communication from Amanda server on Slug to Client PC

root@slug:# install -g backup -o backup -m 700 -d /home/amanda/remotepc/.ssh root@slug:# su backup -c 'ssh-keygen -t rsa -C "Amanda Server Key" -f /home/amanda/remotepc/.ssh/id_rsa'

root@pc2bBackedUp:~# install -g backup -o backup -m 700 -d ~backup/.ssh
And append the contents of /home/amanda/remotepc/.ssh/id_rsa.pub on the server to ~backup/.ssh/authorized_keys on the client.
Test
Both amcheck remotepc and amdump remotepc should now work. And amreport remotepc should give satisfying output.

Procedure 12. Restoring a remote client

SSH keys from client to server

root@pc2bBackedUp:# su backup -c 'ssh-keygen -t rsa -C "Amanda client key" -f ~backup/.ssh/id_rsa'
... and configure authorized_keys on server. Ssh from client to server succeeds.
Segfault
The command amrecover (on the client) fails with a segfault and no error message. Even with
```
index_server 192.168.117.222
tape_server 192.168.117.222
auth ssh
ssh_keys "/var/backups/.ssh/id_rsa"
	
```
in /etc/amanda/amanda-client.conf
For now, this is a show stopper. I'll use rsync for the time being.


Burning images		Ugrading and NSLU2 to Wheezy

Backing up with Amanda on NSLU2

Jurjen Bokma