Rsync Frequently Asked Questions Summary

rsync server open iptables firewall

Client Symptom

 No route to host

Error demonstration

[root@nfs01 tmp]# rsync -avz /etc/hosts [email protected]::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]

Abnormal Problem Solving

Close rsync server firewall service (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.

rsync command rsync client to perform error

Client Symptom

[root@nfs01 tmp]# rsync -avz /etc/hosts [email protected]::/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]

Abnormal Problem Solving

   rsync command syntax misunderstood, :: / backup grammar is wrong, should :: backup (rsync module)

@ERROR: auth failed on module nfsnobody

Client Symptom

[root@nfs01 tmp]# rsync -avz /etc/hosts [email protected]::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]

Abnormal Problem Solving

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:nfsnobody123密码配置文件后面注意不要有空格
   echo "rsync_backup:nfsnobody123" >>/etc/rsync.password
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

Unknown module 'backup' 

Client Symptom

[root@nfs01 tmp]# rsync -avz /etc/hosts [email protected]::backup
@ERROR: Unknown module 'backup'
rsync error: error starting client-server protocol (code 5) at main.c(1503) [sender=3.0.6]

Abnormal Problem Solving

/etc/rsyncd.conf profile module name clerical error

Permission denied

Client Symptom

[root@nfs01 tmp]# rsync -avz /etc/hosts [email protected]::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]

Abnormal Problem Solving

1. shared directory of the owner and the group is not correct, not rsync
privileges 2. shared directory is not correct, not 755

chdir failed

Client Symptom

[root@nfs01 tmp]# rsync -avz /etc/hosts [email protected]::backup
Password: 
@ERROR: chdir failed
rsync error: error starting client-server protocol (code 5) at main.c(1503) [sender=3.0.6]

Abnormal Problem Solving

1. Backup storage directory is not established
backup storage directory and configuration file defines 2. Establish inconsistent

invalid uid rsync

Client Symptom

[root@nfs01 tmp]# rsync -avz /etc/hosts [email protected]::backup
Password: 
@ERROR: invalid uid rsync
rsync error: error starting client-server protocol (code 5) at main.c(1503) [sender=3.0.6]

Abnormal Problem Solving

rsync rsync service corresponding to the virtual user does not exist, and can be re-created.

The client has been configured password file, but avoid secret key login, still you need to enter a password

Client Symptom

password file must not be other-accessible
[root@nfs01 tmp]# rsync -avz /etc/hosts [email protected]::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

Abnormal Problem Solving

Secret key file rsync client privilege must also be 600

rsync client connection problems slow

Error log client

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

Properly log the client

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 nfs01 (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

Abnormal problem-solving
view the log for analysis

rsync service does not start correctly

Client Symptom

Connection refused (111)
[root@nfsnobody ~]#  rsync -avz /etc/hosts [email protected]::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]

Abnormal Problem Solving

[root@nfsnobody ~]# rsync --daemon
[root@nfsnobody ~]# ss -lntup |grep rsync
tcp    LISTEN     0      5  :::873            :::*      users:(("rsync",1434,5))
tcp    LISTEN     0      5  *:873              *:*      users:(("rsync",1434,4))
[root@nfsnobody ~]# rsync -avz /etc/hosts [email protected]::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