Centralized Backup Server With Amanda On CentOS
This document describes how to set up a centralized network backup with Amanda. We will use virtual tape to store the backup.
In my environment, I have 2 Linux servers that I want to backup.
192.168.20.200 (Alpha) : /home/kulathep
192.168.20.201 (Beta) : /data and /var
I am going to build a new server with Amanda as a centralized backup server.
192.168.20.202 (Gamma)
Setup Server (Gamma)
1. Install Amanda with yum:
yum -y install amanda*
2. Edit Amanda conf in xinetd.d:
vi /etc/xinetd.d/amanda
vi /etc/xinetd.d/amandaidx
vi /etc/xinetd.d/amidxtape
Change Disable = yes to Disable = no.
3. Copy Amanda conf files:
cp -r /etc/amanda/DailySet1 /etc/amanda/intra
4. Edit amanda.conf:
vi /etc/amanda/intra/amanda.conf
org "Configuration name"
mailto "email"
netusage 600 Kbps
dumpcycle 2 weeks
runspercycle 10
tapecycle 15 tapes
#tpchanger "chg-manual"
tpchanger "chg-disk"
changerfile "/etc/amanda/intra/changer"
#tapedev "null:"
tapedev "file:/backup/intra/slots"
#tapetype HP-DAT
#labelstr "^DailySet1-[0-9][0-9]*$"
tapetype HARDDISK
define tapetype HARDDISK {
comment “Backup to Virtual Tape”
length 3072 mbytes # each tape is 3 Gigs
}
# amrecover_changer "null:"
amrecover_changer "changer"
#infofile "/etc/amanda/DailySet1/curinfo" # database DIRECTORY
#logdir "/etc/amanda/ DailySet1" # log directory
#indexdir "/etc/amanda/ DailySet1/index" # index directory
infofile "/var/log/amanda/intra/curinfo" # database DIRECTORY
logdir "/var/log/amanda/intra" # log directory
indexdir "/var/log/amanda/intra/index" # index directory
With this configuration, Amanda will do a full backup every 2 weeks, and an incremental backup every week day. The backup will be stored and rotated on 15 virtual tapes.
5. Edit disklist (tell Amanda which servers, directory to backup, what dumptype to use).
vi /etc/amanda/intra/disklist
Remove every lines including “localhost /etc comp-root-tar” at the end of the file. And add:
alpha /home/kulathep comp-user-tar beta /data comp-user-tar beta /var comp-user-tar
Note: See amanda.conf for the dumptype.
6. Edit hosts file:
vi /etc/hostsAdd:
192.168.20.200 alpha 192.168.20.201 beta
7. Create backup directory (we will store the backup here):
mkdir -p -m 770 /backup/intra/slots
chown -R amanda:disk /backup
8. Create tape list:
touch /etc/amanda/intra/tapelist
chown –R amanda:disk /etc/amanda/intra
9. Create slots (virtual tapes):
su - amanda
cd /backup/intra/slots
for ((i=1; $i<=15; i++)); do mkdir slot$i; done
ln -s slot1 data
10. Test virtual tapes:
/usr/sbin/ammt -f file:/backup/intra/slots status
11. Label the virtual tapes:
for ((i=1; $i<=15; i++)); do /usr/sbin/amlabel intra intra-$i slot $i; done
12. Reset the tape:
/usr/sbin/amtape intra reset
13. Edit .amandahosts to allow communications from clients:
vi /var/lib/amanda/.amandahosts
alpha amanda beta amanda gamma amanda
14. Start xinetd service:
su –
service xinetd start
15. Check amanda process:
lsof | grep amanda
