Programmer Group

1. LVS+Keepalived Highly Available Clusters Keepalived is designed to build highly available LVS load balancing clusters that can call ipvsadm tools to create virtual servers and manage server pools rather than just as a two-machine hot standby.Building LVS clusters with Keepalived is easier and easier to use. The main advantages are: hot stan ...

I. build lvs cluster of DR mode Environment: DS: 192.168.4.53 VIP: 192.168.4.100 RS: 192.168.4.51 192.168.4.52 1. Establish three experimental machines and configure ip and yum warehouses 2. Configure VIP on DR [root@53 ~]#cp /etc/sysconfig/network-scripts/ifcfg-eth0 {,:0} [root@53 ~]#vim /etc/sysconfig/network-scripts/ifcfg-e ...

1. Basic knowledge of Keepalived dual-machine warm-up Official keepalived website: www.keepalived.org/ Ke keepalived can also be used as a hot standby software in non-LVS environments. 1. Keepalived role Kekeepalived was originally designed as a powerful assistive tool for LVS, primarily to provide failover and health check functions - to dete ...

Common Web Cluster Schedulers At present, the common Web cluster scheduler is divided into software and hardware. Software usually uses open source LVS, Haproxy, Nginx. Hardware usually uses F5 more. Many people also use some domestic products, such as pike, green league, and so on. Haproxy application analysis LVS has a strong anti-load capab ...

GlusterFS is an open-source distributed file with strong horizontal expansion ability. It can support several petabytes of storage capacity and thousands of clients. It is interconnected into a parallel network file system through the network. It has the characteristics of expansibility, high performance and high availability. Premise: you mu ...

For the working principle and overview of LVS load balancing, please visit: LVS load balancing cluster of Centos 7 For detailed configuration of load balancing cluster in address translation (NAT) mode, please visit: Building load balancing cluster based on address translation (LVS-NAT) mode I. start to configure DR mode LVS preparation:Four C ...

Multiple real columns and one principal and many subordinate Create a directory for database information [root@db200 ~]# mkdir /data/330{7..9} –p Create a file to hold the profile [root@db01 ~]# touch /data/330{7..9}/my.cnf Edit 3307 profile [root@db01 ~]# vim /data/3307/my.cnf [mysqld] basedir=/application/mysql datadir=/data/3307/data so ...

Experimental environment Nginx server (192.168.13.177) Tomcat1 server (192.168.13.151) Tomcat2 server (192.168.13.178) client tester I. load balancing 1. Install Tomcat service on Tomcat1 and Tomcat2 [root@tomcat1 ~]# systemctl stop firewalld.service ##Turn off firewall [root@tomcat1 ~]# mkdir /abc [root@tomcat1 ~]# mount.cifs //192.168.100.3 ...

I. environmental preparation: Operating system: CentOS Linux release 7.5.1804 (Core) MySQL version: mysql-5.7.24-linux-glibc2.12-x86_.tar.gzMain warehouse: 172.16.8.247Slave Library: 172.16.8.249Host name:172.16.8.247 qas-zabbix-node01172.16.8.249 qas-zabbix-node02172.16.8.248 vip 2. mysql5.7 installation and master-slave replication configur ...

Environment: relying on the original test2 database python3 version Multi python environment Enter, python 3 virtual environment, new project test4: ]# cd py3/django-test1/ ]# django-admin startproject test4 To create an app bookshop: ]# cd test4 ]# python manage.py startapp bookshop Modify the settings.py main configuration file: ]# vim test ...