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Environment: 1. linux centOS 7 64 bit2. (slave) linux centOS 7 64 bit3. (mysql) it's better to have the same version. It's recommended that the slave database be no higher than the master database. 5.7 is recommended centos 7 silently installs mariadb. For mysql 5.7 installation, please refer to the following link documents:centos 7 installs m ...

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]# ...

Environmental Science; centos 7     192.168.10.10    master centos 7     192.168.10.129  minion 1. For the convenience of closing the firewall [root@localhost ~]# systemctl disable firewalld // No firewall startup [root@localhost ~]# systemctl stop firewalld // Stop firewall 2. Install salt master on the 192.168.10.10 host [root@ ...

This is also the first time to install docker CE on red hat. I encountered some problems, so I recorded them. 1. Modify the redhat source to the YUM source of centos7 Query yum installation package rpm -qa | grep yum Uninstall the original yum installation package rpm -e yum-3.4.3-150.el7.noarch  --nodeps rpm -e yum-utils-1.1 ...

When a project goes online, it often needs to back up the database regularly to deal with uncertain environment and unknown problems. It is arranged as follows: What is crond? crond and crontab are inseparable. Crontab is a command, common in Unix and Unix like operating systems, which is used to set periodically executed instructions. The co ...

Introduction to Cobbler Cobbler is a Linux server installation service. It can quickly install and reinstall physical servers and virtual machines through PXE, and manage DHCP, DNS, etc. Cobbler can use command-line management, also provides a Web-based interface management tool (cobbler Web), also provides an API interface, which is conveni ...

Log segmentation As the number of visits to the website increases, Apache's individual log files will grow by default Log files take up a lot of disk space Inconvenient to view relevant information Split log files Implementation of rotatelogs segmentation tool in Apache Third party tool cronolog segmentation rotatelogs segmentation ...

1. View the service status of httpd: display the httpd unit, unable to find the service. [root@localhost ~]#systemctl status httpd Unit httpd.service could not be found. 2. Use yum to install httpd service. The following is the installation process: [root@localhost ~]#yum install httpd Loaded plugins: fastestmirror, langpacks Loading mirror sp ...

Environmental description: host name Operating system version ip Default gateway adapter name Destination address 1 Destination address 2 centos7.6 Centos 7.6.1810 172.27.9.135 172.27.9.254 ens33 172.28.105.0/24 172.28.214.17/32 I. temporary method 1. View route and ip [root@centos7 ~]# route -n Kernel IP routing table Destination Ga ...

Docker learning I. DockerFile analysis 1. What is DockerFile DockerFile is a build file used to build Docker image. It is a script composed of a series of commands and parameters. Three steps to build: 1. Manually write a DockerFile file 2. docker build to obtain a customized image 3,docker run 2. Analysis of the construction process of Doc ...