内网linux服务器集群，统一一台ftp服务器做yum源
服务端，安装vsftpd，配置文件改成如下
# cat vsftpd.conf |grep -v ^$|grep -v ^# anonymous_enable=YES local_enable=YES write_enable=YES local_umask=022 dirmessage_enable=YES xferlog_enable=YES connect_from_port_20=YES xferlog_std_format=YES listen=NO listen_ipv6=YES pam_service_name=vsftpd userlist_enable=YES tcp_wrappers=YES listen_port=30021 ftpd_banner="Authorized users only. All activity may be monitored and reported."
然后在默认路径/var/ftp目录下将镜像文件解压
我客户端的yum的repo文件如下
# cat rhel7.repo [base] name=rhel7 baseurl=ftp://10.4.1.93:30021/yumsource enabled=1 gpgcheck=0
所以我们看一下/var/ftp/yumsource
]# ls /var/ftp/yumsource/ -a . addons EFI extra_files.json images LiveOS Packages RPM-GPG-KEY-redhat-beta TRANS.TBL .. .discinfo EULA GPL isolinux media.repo repodata RPM-GPG-KEY-redhat-release .treeinfo
注意事项：
1.我服务端开的是30021端口，所以客户端得有访问服务端30021端口的网络策略
2./var/ftp/yumsource目录下面的文件是基于umask=022的文件权限，如果权限不对，yum源无法使用
3.客户端访问服务端的时候必须加端口，比如ftp 10.4.1.121 30021，如果不想加端口，可以在/etc/services配置文件改一下端口号
默认的
$ cat /etc/services |grep -w ftp ftp-data 20/tcp ftp-data 20/udp # 21 is registered to ftp, but also used by fsp ftp 21/tcp ftp 21/udp fsp fspd ftp-data 20/sctp # FTP ftp 21/sctp # FTP ni-ftp 47/tcp # NI FTP ni-ftp 47/udp # NI FTP ftp-agent 574/tcp # FTP Software Agent System ftp-agent 574/udp # FTP Software Agent System ftps-data 989/tcp # ftp protocol, data, over TLS/SSL ftps-data 989/udp # ftp protocol, data, over TLS/SSL ftps 990/tcp # ftp protocol, control, over TLS/SSL ftps 990/udp # ftp protocol, control, over TLS/SSL odette-ftp 3305/tcp # ODETTE-FTP odette-ftp 3305/udp # ODETTE-FTP
改成
# cat /etc/services |grep -w ftp ftp-data 20/tcp ftp-data 20/udp # 21 is registered to ftp, but also used by fsp ftp 30021/tcp ftp 30021/udp fsp fspd ftp-data 20/sctp # FTP ftp 21/sctp # FTP ni-ftp 47/tcp # NI FTP ni-ftp 47/udp # NI FTP ftp-agent 574/tcp # FTP Software Agent System ftp-agent 574/udp # FTP Software Agent System ftps-data 989/tcp # ftp protocol, data, over TLS/SSL ftps-data 989/udp # ftp protocol, data, over TLS/SSL ftps 990/tcp # ftp protocol, control, over TLS/SSL ftps 990/udp # ftp protocol, control, over TLS/SSL odette-ftp 3305/tcp # ODETTE-FTP odette-ftp 3305/udp # ODETTE-FTP
就不用加端口号了