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Experimental environment A CentOS 7.3 virtual machine with minimal installation Configure the base environment 1. Install apache yum install -y httpd 2. Establish the root directory of the virtual host mkdir /var/wwwroot mkdir /var/wwwroot/site1 mkdir /var/wwwroot/site2 echo -e "site1" >> /var/wwwroot/site1/index.html echo -e "site2" &g ...

Preparation click Official website Download the installation package Use tar -zxvf to extract the installation package to / usr/local directory, and name it redis. The steps are omitted. The results are as follows [root@iZ2xxxxxuf9Z local]# pwd /usr/local [root@iZ2xxxxxuf9Z local]# ls aegis etc include lib libexec nginx ...

Master-Slave Synchronization Experimental preparation A total of four virtual machines, one application side, one amoeba, one master server, and one slave server Application side: centos7-2 (MySQL installed before the experiment) amoeba:centos7-1 (no MySQL) Primary server: centos7-3 (MySQL installed before the experiment) From server: centos ...

Summary This blog builds a cluster environment based on zookeeper-3.4.9. 1. Download zookeeper Edition: http://zookeeper.apache.org/releases.html#download Download version: zookeeper-3.4.9.tar.gz 2. Host 192.168.8.21, 192.168.8.22, 192.168.8.23, 192.168.8.24 and 192.168.8.25. 3. Decompression tar -zxvf zookeeper-3.4.9.t ...

Blog Outline:I. deploy the Web UI interface of dashboardII. Deploy the web scope monitoring k8s clusterIII. deployment of Prometheus service I. deploy the Web UI interface of dashboard 1. Download yaml file configuration and execute #Download the project on github (the project can be found by searching the dashboard of github) [root@master ~ ...

The role of indexes With the appropriate index set, the database can greatly speed up the query speed by utilizing various fast positioning techniques. Especially when the table is large or the query involves multiple tables, using an index can speed up the query thousands of times; The IO cost of the database can be reduced, and the index can ...

I. Introduction to MHA Author brief introduction Song xinjiafan: MySQL/Linux expert Sony in 2001 oracle started in 2001 Started using MySQL in 2004 September 2006 August 2010 MySQL Consultant 2010-2012 DeNA 2012 ~ now Facebook Software introduction MHA can realize automatic fault detection and failover in a short time, usually within 10-30 se ...

Prefacelinux operation and maintenance management is generally managed by remote mode. When hundreds of server hosts need to be managed from a workstation, the remote maintenance mode will be more advantageous.I. SSH Remote ManagementSSH is a secure channel protocol, which is mainly used to realize the remote management, remote replication and ...

VSFTP introduction VSFTP is a kind of FTP server software used on Unix like system published based on GPL. Its full name is Very Secure FTP. Software installation yum install vsftpd mariadb-server mariadb-devel pam-devel -y wget http://prdownloads.sourceforge.net/pam-mysql/pam_mysql-0.7RC1.tar.gz tar xf pam_mysql-0.7RC1.tar.gz cd pam_mysq ...

  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. ...