010-老男孩教育每日一题-简述rsync守护进程模式的常见问题和处理方法
Rsync服务常见问题汇总讲解：
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- rsync服务端开启的iptables防火墙与网络问题
客户端的错误现象：No route to host
1 2 3 | [root@nfs01tmp]# 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）
1 2 3 4 5 6 | [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客户端执行rsync命令错误：
客户端的错误现象：
1 2 3 | [root@nfs01 tmp]# rsync -avz /etc/hosts rsync_backup@172.16.1.41::/backup ERROR: Theremote 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)
- @ERROR: auth failed on module oldboy
客户端的错误现象：
1 2 3 4 | [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
- Unknown module ‘backup’
1 2 3 | [root@nfs01 tmp]# rsync -avz /etc/hostsrsync_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：
1./etc/rsyncd.conf配置文件模块名称书写错误
- Permission denied
1 2 3 4 5 6 7 8 9 | [root@nfs01 tmp]# rsync -avz /etc/hostsrsync_backup@172.16.1.41::backup Password: sending incremental file list hosts rsync: mkstemp ".hosts.5z3AOA" (inbackup) 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.共享目录的属主和属组不正确，不是rsync
2.共享目录的权限不正确，不是755
- chdir failed
1 2 3 4 | [root@nfs01 tmp]# rsync -avz /etc/hostsrsync_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
1 2 3 4 5 | [root@backupbackup]# /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 retrievingcurrent directory: getcwd: cannot access parent directories: No such file ordirectory [ OK ] |
说明：如果没有备份存储目录，xinetd服务都不能正确启动
- invalid uid rsync
1 2 3 4 | [root@nfs01 tmp]# rsync -avz /etc/hostsrsync_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
- 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
1 2 3 4 5 6 7 8 9 | passwordfile must not be other-accessible [root@nfs01 tmp]# rsync -avz /etc/hostsrsync_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
- rsync客户端连接慢问题
错误日志输出
1 | 2017/03/08 20:14:43 [3422] params.c:Parameter() -Ignoring badly formed line in configuration file: ignore errors |
2017/03/0820:14:43 [3422] name lookup failed for 172.16.1.31: Name or service not known
1 2 3 4 | 2017/03/08 20:14:43 [3422] connect from UNKNOWN(172.16.1.31) 2017/03/08 20:14:43 [3422] rsync to backup/ fromrsync_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
1 2 3 4 5 | 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/ fromrsync_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
- rsync服务没有正确启动
1 2 3 4 | Connection refused (111) [root@oldboy-muban ~]# rsync -avz /etc/hostsrsync_backup@172.16.1.41::backup rsync: failed to connect to 172.16.1.41: Connectionrefused (111) rsync error: error in socket IO (code 10) atclientserver.c(124) [sender=3.0.6] |
解决 rsync服务没开启
1 2 3 4 5 6 7 8 9 10 11 | [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/hostsrsync_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 |
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