1. rsync服务端开启的iptables防火墙

【客户端的错误】

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No route to host

【错误演示过程】

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[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]

【异常问题解决】
关闭rsync服务端的防火墙服务(iptables)

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[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.

2. rsync客户端执行rsync命令错误

【客户端的错误】

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

【错误演示过程】

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[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]

【异常问题解决】
rsync命令语法理解错误,::/backup是错误的语法,应该为::backup(rsync模块)

3. rsync服务认证用户失败*****

【客户端的错误】

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auth failed on module oldboy

【错误演示过程】

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[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]

【异常问题解决】

  1. 密码真的输入错误,用户名真的错误
  2. secrets file = /etc/rsync.password指定的密码文件和实际密码文件名称不一致
  3. /etc/rsync.password文件权限不是600
  4. rsync_backup:123456密码配置文件后面注意不要有空格
  5. rsync客户端密码文件中只输入密码信息即可,不要输入虚拟认证用户名称

4. rsync服务位置模块错误

【客户端的错误】

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Unknown module 'backup' 

【错误演示过程】

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[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]

【异常问题解决】
/etc/rsyncd.conf配置文件模块名称书写错误

5. rsync服务权限阻止问题

【客户端的错误】

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Permission denied

【错误演示过程】

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[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]

【异常问题解决】

  1. 备份目录的属主和属组不正确,不是rsync
  2. 备份目录的权限不正确,不是755

6. rsync服务备份目录异常

【客户端的错误】

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chdir failed  

【错误演示过程】

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[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]

【异常问题解决】

  1. 备份存储目录没有建立
  2. 建立的备份存储目录和配置文件定义不一致
    说明:如果没有备份存储目录

7. rsync服务无效用户信息

【客户端的错误】

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invalid uid rsync

【错误演示过程】

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[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]

【异常问题解决】
rsync服务对应rsync虚拟用户不存在了

8. 客户端已经配置了密码文件,但免秘钥登录方式,依旧需要输入密码

【客户端的错误】

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password file must not be other-accessible

【错误演示过程】

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[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

【异常问题解决】
rsync客户端的秘钥文件也必须是600权限

9. rsync客户端连接慢问题

IP === 域名 反向DNS解析
【错误日志信息】

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#错误日志输出
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
#正确日志输出
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

【异常问题解决】
查看日志进行分析,编写rsync服务端hosts解析文件

10 rsync服务没有正确启动

【错误日志信息】

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Connection refused (111)

【错误演示过程】

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[root@oldboy-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]

【异常问题解决】

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[root@oldboy-muban ~]# rsync --daemon
[root@oldboy-muban ~]# ss -lntup |grep rsync
tcp LISTEN 0 5 :::873 :::* users:(("rsync",1434,5))
tcp LISTEN 0 5 *:873 *:* users:(("rsync",1434,4))
[root@oldboy-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

11 rsync: read error: Connection reset by peer (104)

未启动xinetd守护进程

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service xinetd start