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  1) environmental description   1. A total of 7 hosts are required, and their roles are as follows: A. 192.168.36.6(OS6): test B. 192.168.36.7(OS7): localdns C. 192.168.36.17(OS7): rootdns D. 192.168.36.27(OS7): comdns E. 192.168.36.37(OS7): master F. 192.168.36.47(OS7): slave G. 192.168.36.57(OS7): www 2. ...

Linux system is CentOS Linux release 7.4.1708 Python is deleted by manual, manual, and manual, which makes yum unavailable. Baidu, after reinstalling yum and python, always reported all kinds of errors. After suffering, I finally summed up a set of personal tests, which can be used and shared. Uninstall existing python firs ...

1. Application scenario: In some application scenarios, Linux servers need to install application packages through yum, but these Linux servers may not be able to connect to the external network, but there is no corresponding Yum server inside. At this time, find a server that can access the external network inside to configure a proxy, and th ...

mv cut file / directory [root@localhost test]# mv yum yum_bak [root@localhost test]# ls yum_bak rm delete file / directory [root@localhost test]# rm -rf yum_bak File view file type [root@localhost test]# file /etc/yum.conf /etc/yum.conf: ASCII text cat view plain text (small) file content [root@localhost test]# cat -n ...

Connection timeout for Nginx In corporate websites, avoid wasting resources by occupying connections with the same customer for a long timeConnection timeout parameters can be set to control connection access time Configure nginx [root@localhost ~]# yum install pcre-devel zlib-devel gcc gcc-c++ -y ##Install Environment Package [root@localh ...

About Keepalived Keepalived is originally designed for LVS, which is specially used to monitor the status of each service node in the cluster system. It detects the status of each service node according to the third, fourth and fifth layer switching mechanisms of the TCP/IP reference model. If a server node is abnormal, or the ...

Environment centos7, memory at least 4G, Gitlab is memory intensive.GitHub Installation Reference: https://about.gitlab.com/install/Component Installation Reference: https://docs.gitlab.com/ce/development/architecture.html install Configure Yum SourceUse the domestic software mirror station, here use Tsinghua University's open source softwa ...

Install GitLab Installation steps of official website: https://about.gitlab.com/install/#centos-7 Configuration before installation, firewall and so on Mail configuration Landing gitlab Install Gitlab Open http and ssh access of firewall sudo yum install -y curl policycoreutils-python openssh-server sudo systemctl enable sshd sudo systemctl ...

Experimental preparation Install nc tool: yum install nc Monitor local network card traffic: tcpdump-i lo-n-nn TCP port 8888 Establish TCP/UDP connection: nc-p 1234 10.96.78.213 8888 Packet analysis 14:07:53.220954 is the time stamp, accurate to subtle, plus - t does not show the time; 10.96.78.213.1234 meaning: 10.96.78. ...

This blog will introduce the UI operation of the stack in openstack First, put the required files on the http service [root@controller xiandian]# pwd /etc/xiandian [root@controller xiandian]# ls lb-server.yaml nginx_flat.yaml nginx.yaml openrc.sh [root@controller xiandian]# cp nginx* /var/www/html/ [root@controller xiandian]# ...