CentOS 6.3でamanda使ってバックアップを試してみました。
テープは持っていないのでハードディスクへの取得です。
バックアップ取得処理をおこなうサーバーはcentos2、取得対象はcentos1とcentos2のホスト名になります。
# yum install -y amanda-server amanda-client amanda xinetd
xinetdとamandaサービスを有効化します。
# chkconfig amanda on # chkconfig xinetd on # service xinetd start
インストールするとDailySet1というバックアップ設定が作られるので、こちらを修正していきます。
$ vi /etc/amanda/DailySet1/amanda.conf
内容はこんな感じ。テープではなくディスクにバックアップを取得するので、/var/lib/amanda/template.d/amanda-harddisk.confを模倣しています。世代数などは適当です。
org "DailySet1" # your organization name for reports
mailto "amandabackup" # space separated list of operators at your site
dumpcycle 1 week # the number of days in the normal dump cycle
runspercycle 7 # the number of amdump runs in dumpcycle days
# (1 week * 5 amdump runs per week -- just weekdays)
tapecycle 14 tapes # the number of tapes in rotation
# 1 week (dumpcycle) times 5 tapes per week (just
# the weekdays) plus a few to handle errors that
# need amflush and so we do not overwrite the full
# backups performed at the beginning of the previous
# cycle
runtapes 1 # number of tapes to be used in a single run of amdump
tpchanger "chg-disk" # the tape-changer glue script
tapedev "file:/var/lib/amanda/vtapes/DailySet1" # the no-rewind tape device to be used
changerfile "/etc/amanda/DailySet1/changer.conf"
changerdev "/dev/null"
tapetype HARDDISK # what kind of tape it is
labelstr "^DailySet1-[0-9][0-9]*$" # label constraint regex: all tapes must match
dtimeout 1800 # number of idle seconds before a dump is aborted.
ctimeout 30 # maximum number of seconds that amcheck waits
# for each client host
etimeout 300 # number of seconds per filesystem for estimates.
infofile "/var/lib/amanda/DailySet1/curinfo"
logdir "/var/lib/amanda/DailySet1/"
indexdir "/var/lib/amanda/DailySet1/index"
define dumptype global {
comment "Global definitions"
# auth "bsdtcp"
}
#define application-tool and dumptype for the amgtar application
define application-tool app_amgtar {
comment "amgtar"
plugin "amgtar"
#property "GNUTAR-PATH" "/path/to/gtar"
#property "GNUTAR-LISTDIR" "/path/to/gnutar_list_dir"
}
define dumptype gui-base {
global
program "APPLICATION"
application "app_amgtar"
comment "gui base dumptype dumped with tar"
compress none
index yes
}
define tapetype HARDDISK {
length 100000 mbytes
}
includefile "/var/lib/amanda/template.d/dumptypes"
amandabackupユーザーでamcheckを実行してみます。
$ amcheck DailySet1
Amanda Tape Server Host Check
-----------------------------
NOTE: tapelist will be created on the next run.
slot 1:Found an empty or non-amanda tape.
slot 2:Found an empty or non-amanda tape.
slot 3:Found an empty or non-amanda tape.
slot 4:Found an empty or non-amanda tape.
slot 5:Found an empty or non-amanda tape.
slot 6:Found an empty or non-amanda tape.
slot 7:Found an empty or non-amanda tape.
slot 8:Found an empty or non-amanda tape.
slot 9:Found an empty or non-amanda tape.
slot 10:Found an empty or non-amanda tape.
slot 11:Found an empty or non-amanda tape.
slot 12:Found an empty or non-amanda tape.
slot 13:Found an empty or non-amanda tape.
slot 14:Found an empty or non-amanda tape.
(expecting a new tape)
NOTE: conf info dir /var/lib/amanda/DailySet1/curinfo does not exist
NOTE: it will be created on the next run.
NOTE: index dir /var/lib/amanda/DailySet1/index/centos1 does not exist
NOTE: it will be created on the next run.
NOTE: index dir /var/lib/amanda/DailySet1/index/centos2 does not exist
NOTE: it will be created on the next run.
Server check took 5.723 seconds
Amanda Backup Client Hosts Check
--------------------------------
Client check: 2 hosts checked in 2.056 seconds. 0 problems found.
(brought to you by Amanda 2.6.1p2)
$
仮想テープ用ディレクトリとラベルを作成します。先のamanda.confに”tapecycle 14 tapes”としていますのでslot1～14まで作成します。
$ mkdir -p /var/lib/amanda/vtapes/DailySet1 $ for i in `seq 1 14`; do mkdir /var/lib/amanda/vtapes/DailySet1/slot$i; done $ for i in `seq 1 14`; do amlabel DailySet1 DailySet1-`printf %02d $i` slot $i; done labeling tape in slot 1 (file:/var/lib/amanda/vtapes/DailySet1): Reading label... Found an empty tape. Writing label DailySet1-01.. Checking label... Success! labeling tape in slot 2 (file:/var/lib/amanda/vtapes/DailySet1): Reading label... Found an empty tape. Writing label DailySet1-02.. Checking label... Success! ～中略～ labeling tape in slot 14 (file:/var/lib/amanda/vtapes/DailySet1): Reading label... Found an empty tape. Writing label DailySet1-14.. Checking label... Success! $
バックアップ対象は/etc/amanda/DailySet1/disklistに記述します。さしあたって各サーバーの/etc配下を取得。
centos1 /etc comp-root-tar centos2 /etc comp-root-tar
ここまで設定したらamdumpで実際にバックアップを取得してみます(amandabackupユーザーで実行)。
$ amdump DailySet1
エラーがなければ何も出力されずに終了しますので、amadminコマンドでバックアップリストを表示してみます。
$ amadmin DailySet1 find date host disk lv tape or file file part status 2012-08-04 23:50:02 centos1 /etc 1 DailySet1-10 1 1/1 OK 2012-08-04 23:50:02 centos2 /etc 0 DailySet1-10 1 1/1 OK You have new mail in /var/spool/mail/amandabackup $
無事取得できたようです。
リストアには/etc/amanda/amanda-client.confの作成とxinetd設定の変更が必要です。
$ cat /etc/amanda/amanda-client.conf
#
# amanda.conf - sample Amanda client configuration file.
#
# This file normally goes in /etc/amanda/amanda-client.conf.
#
conf "DailySet1" # your config name
index_server "centos2" # your amindexd server
tape_server "centos2" # your amidxtaped server
tapedev "file:/var/lib/amanda/vtapes/DailySet1" # your tape device
# if not set, Use configure or ask server.
# if set to empty string "", ask server
# amrecover will use the changer if set to the value
# of 'amrecover_changer' in the server amanda.conf.
# auth - authentication scheme to use between server and client.
# Valid values are "bsd", "bsdudp", "bsdtcp", "krb5", "local",
# "rsh" and "ssh".
# Default: [auth "bsdtcp"]
auth "bsd"
#ssh_keys "" # your ssh keys file if you use ssh auth
#resolves "resource temporarily unavailable" bug
unreserved-tcp-port 1025,65535
$
取得サーバーであるcentos2側では/etc/xinetd.d/amandaのserver_argsに修正が必要です(amindexd amidxtapedを追加)。
server_args = -auth=bsd amdump
↓
server_args = -auth=bsd amdump amindexd amidxtaped
rootユーザーでamrecoverを実行してみます。
# amrecover AMRECOVER Version 2.6.1p2. Contacting server on centos2 ... 220 centos2 AMANDA index server (2.6.1p2) ready. Setting restore date to today (2012-08-04) 200 Working date set to 2012-08-04. 200 Config set to DailySet1. 200 Dump host set to centos2. Use the setdisk command to choose dump disk to recover amrecover> listdisk 200- List of disk for host centos2 201- /etc 200 List of disk for host centos2 amrecover> setdisk /etc 200 Disk set to /etc. amrecover>
あとはlsで取得されているファイルの一覧を確認して、リストア対象をadd、extractすればカレントディレクトリに展開されます(カレントディレクトリはlcdで変更可)。