rsync備份服務(下)

第1章 回顧

1.1 rsync備份軟件是什麼

   是一款開源的 多功能 快速的全量和增量備份軟件算法

1.2  rsync軟件命令特色(1v4)

a 等價於本地複製命令(cp)vim

b 等價於遠程複製命令(scp)服務器

c 等價於數據刪除命令(rm)網絡

d 等價於數據查看命令(ls)ssh

1.3  rsync軟件服務特色(7點)

1. 能夠實現排除同步數據socket

2. 能夠實現加密傳輸數據(藉助ssh協議隧道)tcp

3. 能夠實現數據傳輸認證機制ide

4. 能夠實現socket守護進程方式,傳輸數據(重點)測試

5. 能夠保持數據傳輸屬性信息不變(-p)網站

6. 能夠傳輸普通文件,也能夠傳輸特殊文件(連接文件 或者 設備文件)

7. 能夠數據增量傳輸

1.4  rsync軟件實現增量傳輸同步原理

基於一種特殊的算法「quick check」,實現增量複製傳輸數據

1. 先實現兩臺主機之間網絡互通

2. 對要傳輸的數據信息,進行屬性信息比對(好比 文件大小 時間信息 屬主 屬組 權限屬性等)

3. 只傳輸變化的數據信息

1.5 rsync服務工做方式(三種)

1. 實現本地數據傳輸備份

2. 實現遠程數據傳輸備份

3. 實現守護進程方式數據傳輸備份(重點)

1.6 rsync守護進程方式部署流程

1.6.1 服務端部署流程:

第一步:檢查軟件是否安裝

第二步:編寫rsync軟件配置文件

第三步:建立備份目錄的管理用戶

第四步:建立認證時所須要密碼文件(對密碼文件權限進行修改成600權限)

第五步:建立數據備份目錄,修改備份目錄屬主和屬組權限爲管理用戶(rsync)

第六步:啓動rsync服務(rsync --daemon)

1.6.2 客戶端部署流程:

進行數據傳輸測試

   說明:若是想實現免交互方式傳輸數據,客戶端要完成如下操做步驟

第一步:建立密碼文件,並進行修改權限爲600

    echo "wuhuang123" >>/etc/rsync.password

   chmod 600 /etc/rsync.password

[root@nfs01 ~]# echo "wuhuang123" >>/etc/rsync.password

[root@nfs01 ~]# chmod 600 /etc/rsync.password

[root@nfs01 ~]# ll /etc/rsync.password

-rw------- 1 root root 10 Jan 23 14:45 /etc/rsync.password

第二步:進行免交互傳輸數據測試

    rsync -avz /etc/hosts rsync_backup@backup::backup  --password-file=/etc/rsync.password

[root@nfs01 ~]# rsync -avz /etc/hosts rsync_backup@backup::backup  --password-file=/etc/rsync.password

sending incremental file list

hosts

 

sent 201 bytes  received 27 bytes  456.00 bytes/sec

total size is 372  speedup is 1.63

[root@backup ~]# ll /backup/

total 4

-rw-r--r-- 1 rsync rsync 372 Jan 19 11:55 hosts

1.7 rsync守護進程方式傳輸數據原理過程

image.png 

第2章 實際工做中部署rsync軟件方案

    在備份服務器上部署rsync軟件服務,採用推的方式(push:即從本地機器拷貝文件到遠程rsync服務器中)進行數據備份傳輸

   採用定時備份:備份的數據信息大部分是內部人員產生的數據

   採用實時備份:備份的數據信息大部分是外部人員產生的數據

第3章 rsync命令參數

命令參數

參數

-v, --verbose

詳細模式輸出,傳輸時的信息。

-z,--compress

傳輸時進行壓縮提供傳輸效率,--compress-level=NUM 可按級別壓縮,局域網能夠不用壓縮

-a, --archive  重要

歸檔模式,表示以遞歸方式傳輸文件,並保持全部文件屬性,等於-rlptgoD。

-r, --recursive 歸類於-a參數

對子目錄以遞歸模式處理,即目錄下的全部目錄都一樣傳輸,注意是小寫

-t, --times    歸類於-a參數

保持文件時間信息。

-o, --owner   歸類於-a參數 

保持文件屬主信息。

-p, --perms   歸類於-a參數

保持文件權限。

-g, --group   歸類於-a參數

保持文件屬組信息。

-P --progress

等同於 --partial,顯示備份過程。

-D, --devices  歸類於-a參數

保持設備文件信息。

-l, --links     歸類於-a參數

保留軟鏈結。(小寫字母)

-e, --rsh=command

指定使用rsh、ssh方式進行數據同步

--exclude=PATTETN

用來指定排除那些不但願傳輸的文件(和tar參數同樣

--exclude-from=FILE

文件名所在的目錄文件,便可以實現排除多個文件(和tar參數同樣

--bwlimit=RATE

limit I/O bandwidth: KBytes per second

limit socket I/O bandwidth限速功能

案例:某DBA作數據同步,帶寬佔滿,致使用戶沒法訪問網站

--delete

讓目標目錄SRC和源目錄數據DST一致,即無差別同步數據

保持同步目錄及文件屬性:

這裏的-avzP 至關於 -vzrtopgDIP(還多了DI功能),生產環境經常使用的參數選項爲 -avzP 或 -vzrtopgP

若是是放入腳本中,也能夠把 -v 和 -P去掉。這裏的 --progress 能夠用 -P代替。

 

例:-e, --rsh=command 指定使用rsh、ssh方式進行數據同步

[root@nfs01 ~]# rsync -avz -e "ssh -p22" /wuhuang/a 172.16.1.41:/backup

The authenticity of host '172.16.1.41 (172.16.1.41)' can't be established.

RSA key fingerprint is 57:3f:64:68:95:4d:99:54:01:33:ab:47:a0:72:da:bf.

Are you sure you want to continue connecting (yes/no)? yes

Warning: Permanently added '172.16.1.41' (RSA) to the list of known hosts.

root@172.16.1.41's password:

sending incremental file list

a/

a/1

a/2

a/3

 

sent 171 bytes  received 73 bytes  28.71 bytes/sec

total size is 0  speedup is 0.00

[root@backup ~]# ll /backup/

total 8

drwxr-xr-x 2 root  root  4096 Jan 23 17:54 a  

第4章 rsync服務常見錯誤

4.1 rsync服務端開啓的iptables防火牆

 【客戶端的錯誤】

   No route to host

  【錯誤演示過程】

[root@nfs01 tmp]# rsync -avz /etc/hosts rsync_backup@172.16.1.41::backup

rsync: failed to connect to 172.16.1.41: No route to host (113)

rsync error: error in socket IO (code 10) at clientserver.c(124) [sender=3.0.6]

  【異常問題解決】

   關閉rsync服務端的防火牆服務(iptables)    也可作防火牆設置,此處很少講

[root@backup mnt]# /etc/init.d/iptables stop

iptables: Setting chains to policy ACCEPT: filter              [  OK  ]

iptables: Flushing firewall rules:                             [  OK  ]

iptables: Unloading modules:                               [  OK  ]

[root@backup mnt]# /etc/init.d/iptables status

iptables: Firewall is not running.

4.2  rsync客戶端執行rsync命令錯誤:

   客戶端的錯誤現象:   

[root@nfs01 tmp]# rsync -avz /etc/hosts rsync_backup@172.16.1.41::/backup

ERROR: The remote path must start with a module name not a /

rsync error: error starting client-server protocol (code 5) at main.c(1503) [sender=3.0.6]

   異常問題解決:

rsync命令語法理解錯誤,::/backup是錯誤的語法,應該爲::backup(rsync模塊)

4.3  @ERROR: auth failed on module oldboy

   客戶端的錯誤現象:

[root@nfs01 tmp]# rsync -avz /etc/hosts rsync_backup@172.16.1.41::backup

Password:

@ERROR: auth failed on module backup

rsync error: error starting client-server protocol (code 5) at main.c(1503) [sender=3.0.6]

   異常問題解決:

1. 密碼真的輸入錯誤,用戶名真的錯誤

2. secrets file = /etc/rsync.password指定的密碼文件和實際密碼文件名稱不一致

3. /etc/rsync.password文件權限不是600

4. rsync_backup:123456密碼配置文件後面注意不要有空格

5. rsync客戶端密碼文件中只輸入密碼信息便可,不要輸入虛擬認證用戶名稱

4.4 Unknown module 'backup' 

[root@nfs01 tmp]# rsync -avz /etc/hosts rsync_backup@172.16.1.41::backup

@ERROR: Unknown module 'backup'

rsync error: error starting client-server protocol (code 5) at main.c(1503) [sender=3.0.6]

   異常問題解決:

1. /etc/rsyncd.conf配置文件模塊名稱書寫錯誤  

2. 模塊對應的目錄建立有誤

4.5 Permission denied

[root@nfs01 tmp]# rsync -avz /etc/hosts rsync_backup@172.16.1.41::backup

Password:

sending incremental file list

hosts

rsync: mkstemp ".hosts.5z3AOA" (in backup) failed: Permission denied (13)

 

sent 196 bytes  received 27 bytes  63.71 bytes/sec

total size is 349  speedup is 1.57

rsync error: some files/attrs were not transferred (see previous errors) (code 23) at main.c(1039) [sender=3.0.6]   

   異常問題解決:

1. 共享目錄的屬主和屬組不正確,不是rsync

2. 共享目錄的權限不正確,不是755

4.6 chdir failed 

[root@nfs01 tmp]# rsync -avz /etc/hosts rsync_backup@172.16.1.41::backup

Password:

@ERROR: chdir failed

rsync error: error starting client-server protocol (code 5) at main.c(1503) [sender=3.0.6]

    異常問題解決:

1. 備份存儲目錄沒有創建

2. 創建的備份存儲目錄和配置文件定義不一致

說明:若是沒有備份存儲目錄

 4.7 invalid uid rsync

[root@nfs01 tmp]# rsync -avz /etc/hosts rsync_backup@172.16.1.41::backup

Password:

@ERROR: invalid uid rsync

rsync error: error starting client-server protocol (code 5) at main.c(1503) [sender=3.0.6]

    異常問題解決:

rsync服務對應rsync虛擬用戶不存在了

4.8 客戶端已經配置了密碼文件,但免祕鑰登陸方式,依舊須要輸入密碼

password file must not be other-accessible

[root@nfs01 tmp]# rsync -avz /etc/hosts rsync_backup@172.16.1.41::backup --password-file=/etc/rsync.password

password file must not be other-accessible

continuing without password file

Password:

sending incremental file list

 

sent 26 bytes  received 8 bytes  5.23 bytes/sec

total size is 349  speedup is 10.26

    異常問題解決:

rsync客戶端的祕鑰文件也必須是600權限

4.9 rsync客戶端鏈接慢問題

錯誤日誌輸出

2017/03/08 20:14:43 [3422] params.c:Parameter() - Ignoring badly formed line in configuration file: ignore errors

2017/03/08 20:14:43 [3422] name lookup failed for 172.16.1.31: Name or service not known

2017/03/08 20:14:43 [3422] connect from UNKNOWN (172.16.1.31)

2017/03/08 20:14:43 [3422] rsync to backup/ from rsync_backup@unknown (172.16.1.31)

2017/03/08 20:14:43 [3422] receiving file list

2017/03/08 20:14:43 [3422] sent 76 bytes  received 83 bytes  total size 349

正確日誌輸出

2017/03/08 20:16:45 [3443] params.c:Parameter() - Ignoring badly formed line in configuration file: ignore errors

2017/03/08 20:16:45 [3443] connect from nfs02 (172.16.1.31)

2017/03/08 20:16:45 [3443] rsync to backup/ from rsync_backup@nfs02 (172.16.1.31)

2017/03/08 20:16:45 [3443] receiving file list

2017/03/08 20:16:45 [3443] sent 76 bytes  received 83 bytes  total size 349

  客戶端鏈接慢緣由:主機名未被解析

    異常問題解決:

查看日誌進行分析,配置/etc/hosts文件,寫入對應主機名與IP的映射關係

4.10 rsync服務沒有正確啓動

Connection refused (111)

[root@wuhuang-muban ~]#  rsync -avz /etc/hosts rsync_backup@172.16.1.41::backup

rsync: failed to connect to 172.16.1.41: Connection refused (111)

rsync error: error in socket IO (code 10) at clientserver.c(124) [sender=3.0.6]

解決 rsync服務沒開啓

[root@wuhuang-muban ~]# rsync --daemon

[root@wuhuang-muban ~]# ss -lntup |grep rsync

tcp    LISTEN     0      5               :::873               :::*   users:(("rsync",1434,5))

tcp    LISTEN     0      5               *:873              *:*    users:(("rsync",1434,4))

[root@wuhuang-muban ~]# rsync -avz /etc/hosts rsync_backup@172.16.1.41::backup

Password:

sending incremental file list

hosts

 

sent 196 bytes  received 27 bytes  49.56 bytes/sec

total size is 349  speedup is 1.57

第5章 rsync擴展應用說明

5.1 rsync服務特殊啓動方法

1.  rsync守護進程開機自啓動

echo "rsync --daemon" >>/etc/rc.local

 

利用xinetd服務啓動rsync守護進程服務流程

5.1.1 第一個里程碑:確認是否安裝了xinetd服務軟件

   rpm -qa|grep xinetd

      yum install -y xinetd

[root@backup ~]# rpm -qa|grep xinetd

[root@backup ~]# yum install xinetd -y

5.1.2 第二個里程碑:配置xinetd文件,讓rsync服務容許被超級守護進程管理

   vim /etc/xinetd.d/rsync

   disable = yes   ===>  disable = no

[root@backup ~]# vim /etc/xinetd.d/rsync

# default: off

# description: The rsync server is a good addition to an ftp server, as it \

#       allows crc checksumming etc.

service rsync

{

        disable =no

        flags           = IPv6

        socket_type     = stream

        wait            = no

        user            = root

        server          = /usr/bin/rsync

        server_args     = --daemon

        log_on_failure  += USERID

}   

5.1.3 第三個里程碑:確保rsync守護進程服務關閉了

[root@backup ~]# netstat -lntup|grep rsync                                                                

tcp        0      0 0.0.0.0:873                 0.0.0.0:*                   LISTEN      1294/rsync          

tcp        0      0 :::873                      :::*                        LISTEN      1294/rsync          

[root@backup ~]# killall rsync

[root@backup ~]# killall rsync

rsync: no process killed

5.1.4 第四個里程碑:啓動xinetd服務

[root@backup ~]# /etc/init.d/xinetd start

Starting xinetd:                                           [  OK  ]

[root@backup ~]#  netstat -lntup|grep 873

tcp        0      0 :::873               :::*                      LISTEN      1353/xinetd  

5.2 守護進程多模塊功能配置

5.2.1 第一個里程碑-修改配置文件

[root@backup ~]# cat /etc/rsyncd.conf

#rsync_config

#created by HQ at 2017

##rsyncd.conf start##

 

uid = rsync

gid = rsync

use chroot = no

max connections = 200

timeout = 300

pid file = /var/run/rsyncd.pid

lock file = /var/run/rsync.lock

log file = /var/log/rsyncd.log

ignore errors

read only = false

list = false

hosts allow = 172.16.1.0/24

 

hosts deny = 0.0.0.0/32

auth users = rsync_backup

secrets file = /etc/rsync.password

[backup]

comment = "backup dir by wuhuang"

path = /backup

[devbackup]

comment = "backup dir by wuhuang"

path = /devbackup

[sabackup]

comment = "backup dir by wuhuang"

path = /sabackup

5.2.2 第二個里程碑-建立數據備份目錄,修改備份目錄屬主和屬組權限爲管理用戶

[root@backup ~]# mkdir /{backup,devbackup,sabackup}/ -p

[root@backup ~]# chown -R rsync.rsync /{backup,devbackup,sabackup}/

[root@backup ~]#  ll /backup/ -d

drwxr-xr-x 3 rsync rsync 4096 Jan 23 21:08 /backup/

[root@backup ~]# ll /devbackup/ -d

drwxr-xr-x 2 rsync rsync 4096 Jan 23 23:17 /devbackup/

[root@backup ~]# ll /sabackup/ -d

drwxr-xr-x 2 rsync rsync 4096 Jan 23 23:17 /sabackup/

5.2.3 第三個里程碑-重啓rsync服務

[root@backup ~]# /etc/init.d/xinetd restart

Stopping xinetd:                                           [  OK  ]

Starting xinetd:                                            [  OK  ]

說明:

     1. 若是是由rsync --daemon啓動的,重啓時使用 killall rsync && rsync --daemon

2. 若是是由 /etc/init.d/xinetd start啓動的,重啓時使用 /etc/init.d/xinetd restart

5.2.4 第四個里程碑-rsync客戶端測試

[root@nfs01 ~]# rsync --delete -avz /etc/hosts rsync_backup@172.16.1.41::devbackup --password-file=/etc/rsync.password

sending incremental file list

hosts

 

sent 205 bytes  received 27 bytes  464.00 bytes/sec

total size is 372  speedup is 1.60

[root@nfs01 ~]# rsync --delete -avz /etc/hosts rsync_backup@172.16.1.41::sabackup --password-file=/etc/rsync.password

sending incremental file list

hosts

 

sent 205 bytes  received 27 bytes  464.00 bytes/sec

total size is 372  speedup is 1.60

[root@nfs01 ~]#  rsync --delete -avz /etc/hosts rsync_backup@172.16.1.41::backup --password-file=/etc/rsync.password

sending incremental file list

hosts

 

sent 205 bytes  received 27 bytes  464.00 bytes/sec

total size is 372  speedup is 1.60

[root@backup ~]# ll /backup/ /devbackup/ /sabackup/

/backup/:

total 4

-rw-r--r-- 1 rsync rsync 372 Jan 19 11:55 hosts

/devbackup/:

total 4

-rw-r--r-- 1 rsync rsync 372 Jan 19 11:55 hosts

/sabackup/:

total 4

-rw-r--r-- 1 rsync rsync 372 Jan 19 11:55 hosts

5.3 守護進程的排除功能實踐

  建立一個測試環境:nfs服務器(客戶端)上操做

[root@nfs01 ~]# tree /wuhuang/

/wuhuang/

├── a

│   ├── 1

│   ├── 2

│   └── 3

├── b

│   ├── 1

│   ├── 2

│   └── 3

├── c

│   ├── 1

│   ├── 2

│   └── 3

└── d

    ├── 1

    ├── 2

└── 3

4 directories, 12 files

 


實現數據同步傳輸排除方法

1. --exclude       參數指定排除的文件或目錄信息

2. --exclude-from  參數指定排除的多個數據信息文件

5.3.1 --exclude=PATTETN

 --exclude實現排除需求:不要a和b,只要c目錄全部數據,d目錄中只要1和3文件

[root@nfs01 ~]# rsync -avz /wuhuang/ --exclude=a --exclude=b --exclude=d/2   rsync_backup@172.16.1.41::backup  --password-file=/etc/rsync.password

sending incremental file list

./

c/

c/1

c/2

c/3

d/

d/1

d/3

 

sent 292 bytes  received 114 bytes  270.67 bytes/sec

total size is 0  speedup is 0.00

[root@backup ~]# ll -R /backup/

/backup/:

total 8

drwxr-xr-x 2 rsync rsync 4096 Jan 23 17:54 c

drwxr-xr-x 2 rsync rsync 4096 Jan 23 17:54 d

 

/backup/c:

total 0

-rw-r--r-- 1 rsync rsync 0 Jan 23 17:54 1

-rw-r--r-- 1 rsync rsync 0 Jan 23 17:54 2

-rw-r--r-- 1 rsync rsync 0 Jan 23 17:54 3

 

/backup/d:

total 0

-rw-r--r-- 1 rsync rsync 0 Jan 23 17:54 1

-rw-r--r-- 1 rsync rsync 0 Jan 23 17:54 3

 以上命令精簡化:

rsync -avz /wuhuang/ --exclude={a..b} --exclude=d/2   rsync_backup@172.16.1.41::backup  --password-file=/etc/rsync.password

rsync -avz /wuhuang/ --exclude={a,b} --exclude=d/2   rsync_backup@172.16.1.41::backup  --password-file=/etc/rsync.password

5.3.2 --exclude-from=FILE


--exclude-from實現排除需求:不要a和b 只要c目錄全部數據 d目錄中只要1和3文件

[root@nfs01 wuhuang]# pwd

/wuhuang

[root@nfs01 wuhuang]# vim exclude.txt

[root@nfs01 wuhuang]# cat exclude.txt

a

b

d/2

[root@nfs01 wuhuang]# rsync -avz /wuhuang/ --exclude-from=/wuhuang/exclude.txt  rsync_backup@172.16.1.41::backup  --password-file=/etc/rsync.password 

sending incremental file list

./

exclude.txt

c/

c/1

c/2

c/3

d/

d/1

d/3

 

sent 368 bytes  received 133 bytes  1002.00 bytes/sec

total size is 8  speedup is 0.02

[root@backup ~]# ll -R /backup/

/backup/:

total 12

drwxr-xr-x 2 rsync rsync 4096 Jan 23 17:54 c

drwxr-xr-x 2 rsync rsync 4096 Jan 23 17:54 d

-rw-r--r-- 1 rsync rsync    8 Jan 23 23:54 exclude.txt

 

/backup/c:

total 0

-rw-r--r-- 1 rsync rsync 0 Jan 23 17:54 1

-rw-r--r-- 1 rsync rsync 0 Jan 23 17:54 2

-rw-r--r-- 1 rsync rsync 0 Jan 23 17:54 3

/backup/d:

total 0

-rw-r--r-- 1 rsync rsync 0 Jan 23 17:54 1

-rw-r--r-- 1 rsync rsync 0 Jan 23 17:54 3

說明:若是在排除同步過程當中,出現了指定的exclude.txt文件,兩種方法解決:

01. 將exclude.txt文件從同步數據目錄中移出

02. 在exclude.txt文件中寫入排除自身文件信息

5.3.3 守護進程來建立備份目錄

[root@backup ~]# ll /backup/

total 0

[root@nfs01 ~]#  rsync -av /wuhuang/a  rsync_backup@172.16.1.41::backup/01/  --password-file=/etc/rsync.password  

sending incremental file list

created directory 01

a/

a/1

a/2

a/3

 

sent 176 bytes  received 69 bytes  163.33 bytes/sec

total size is 0  speedup is 0.00

[root@nfs01 ~]# rsync -avz /wuhuang/b  rsync_backup@172.16.1.41::backup/02/  --password-file=/etc/rsync.password

sending incremental file list

created directory 02

b/

b/1

b/2

b/3

 

sent 167 bytes  received 69 bytes  472.00 bytes/sec

total size is 0  speedup is 0.00

[root@backup ~]# tree /backup/

/backup/

├── 01

│   └── a

│       ├── 1

│       ├── 2

│       └── 3

└── 02

    └── b

        ├── 1

        ├── 2

        └── 3

 

4 directories, 6 files

 

說明:rsync客戶端沒法實現mkdir -p參數功能,即沒法實現建立多級目錄

[root@nfs01 ~]# rsync -avz /wuhuang/c  rsync_backup@172.16.1.41::backup/03/w/h  --password-file=/etc/rsync.password

sending incremental file list

rsync: mkdir "03/w/h" (in backup) failed: No such file or directory (2)

rsync error: error in file IO (code 11) at main.c(576) [receiver=3.0.6]

rsync: connection unexpectedly closed (5 bytes received so far) [sender]

rsync error: error in rsync protocol data stream (code 12) at io.c(600) [sender=3.0.6]

5.3.4 守護進程的訪問控制配置

[root@backup ~]# cat /etc/rsyncd.conf 

#rsync_config

#created by HQ at 2017

##rsyncd.conf start##

 

uid = rsync

gid = rsync

use chroot = no

max connections = 200

timeout = 300

pid file = /var/run/rsyncd.pid

lock file = /var/run/rsync.lock

log file = /var/log/rsyncd.log

ignore errors

read only = false

list = false

hosts allow = 172.16.1.0/24

hosts deny = 0.0.0.0/32

auth users = rsync_backup

secrets file = /etc/rsync.password

[backup]

comment = "backup dir by wuhuang"

path = /backup

[devbackup]

comment = "backup dir by wuhuang"

path = /devbackup

[sabackup]

comment = "backup dir by wuhuang"

path = /sabackup


image.png 

第三種狀況測試

[root@nfs01 ~]# rsync --delete -avz /etc/hosts rsync_backup@10.0.0.41::backup --password-file=/etc/rsync.password

sending incremental file list

hosts

 

sent 205 bytes  received 27 bytes  154.67 bytes/sec

total size is 372  speedup is 1.60                              10.0.0.41網段能夠實現傳輸

5.4 守護進程無差別同步配置

  無差別同步通俗的講:

1. 我有的數據,你也有;我沒有的數據,你也不能有(刪除)

2. 存儲與備份服務數據徹底一致(如出一轍)

5.4.1 實現無差別同步的方法:利用--delete

我有的數據,你也有:實踐過程

rsync客戶端操做命令:

[root@nfs01 ~]# rsync -avz --delete /wuhuang/ rsync_backup@172.16.1.41::backup  --password-file=/etc/rsync.password

sending incremental file list

./

exclude.txt

a/

a/1

a/2

a/3

b/

b/1

b/2

b/3

c/

c/1

c/2

c/3

d/

d/1

d/2

d/3

 

sent 705 bytes  received 274 bytes  1958.00 bytes/sec

total size is 8  speedup is 0.01

rsync服務端檢查:

[root@backup ~]# tree /backup/

/backup/

├── a

│   ├── 1

│   ├── 2

│   └── 3

├── b

│   ├── 1

│   ├── 2

│   └── 3

├── c

│   ├── 1

│   ├── 2

│   └── 3

├── d

│   ├── 1

│   ├── 2

│   └── 3

└── exclude.txt

 

4 directories, 13 files


 

我沒有的數據,你也不能有(刪除):實踐過程

[root@nfs01 ~]# cd /wuhuang/

[root@nfs01 wuhuang]# rm -rf a

[root@nfs01 wuhuang]# ll

total 16

drwxr-xr-x 2 root root 4096 Jan 23 17:54 b

drwxr-xr-x 2 root root 4096 Jan 23 17:54 c

drwxr-xr-x 2 root root 4096 Jan 23 17:54 d

-rw-r--r-- 1 root root    8 Jan 23 23:54 exclude.txt

[root@nfs01 wuhuang]# rsync -avz --delete /wuhuang/ rsync_backup@172.16.1.41::backup  --password-file=/etc/rsync.password

sending incremental file list

./

deleting a/3

deleting a/2

deleting a/1

deleting a/

 

sent 177 bytes  received 14 bytes  382.00 bytes/sec

total size is 8  speedup is 0.04

rsync服務端檢查:

[root@backup ~]# tree /backup/

/backup/

├── b

│   ├── 1

│   ├── 2

│   └── 3

├── c

│   ├── 1

│   ├── 2

│   └── 3

├── d

│   ├── 1

│   ├── 2

│   └── 3

└── exclude.txt

 

3 directories, 10 files

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