Rsync服務常見問題彙總

1. rsync服務端開啓的iptables防火牆
   客戶端的錯誤現象：No route to host
   [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）
   [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)

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. 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
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

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
      [root@backup backup]# /etc/init.d/xinetd restart
      shell-init: error retrieving current directory: getcwd: cannot access parent directories: No such file or directory
      Stopping xinetd: [ OK ]
      Starting xinetd: shell-init: error retrieving current directory: getcwd: cannot access parent directories: No such file or directory
      [ OK ]
      說明：若是沒有備份存儲目錄，xinetd服務都不能正確啓動

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

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

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
   異常問題解決：
   查看日誌進行分析

10 rsync服務沒有正確啓動
Connection refused (111)
[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]
解決 rsync服務沒開啓
[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