(1) Centos7 installation to build a cluster environment

Virtual machine installation##

Link: https://pan.baidu.com/s/1A4zs_oY6vstDLcJaEkC63w
Extraction code: y8y8

centos7 installation package, one-click installation after downloading##

Link: https://pan.baidu.com/s/1MFzXkPWYUJuDiBT1jw2ThQ
Extraction code: y8y8

Customize installation configuration

Set the root login password, enter the virtual machine, and clone two full nodes

Completely cloned three nodes.png

vim /etc/sysconfig/network-scripts/ifcfg-ens33
Gateway configuration:
TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=static
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_FAILURE_FATAL=no
IPV6_ADDR_GEN_MODE=stable-privacy
NAME=ens33
DEVICE=ens33
ONBOOT=yes
IPADDR=xxx.xxx.xx.xxx
NETMASK=255.255.255.0
GATEWAY=xxx.xxx.xx.x
DNS1=114.114.114.114

cd /etc/sysconfig/
vi network
Add to
NETWORKING=yes

Turn off the firewall:

• The firewall is turned off in this power-on state

• systemctl stop firewalld (close the firewall in this service)

• Firewall is disabled after server restart

• systemctl disable firewalld (disable firewall service)

• View firewall status

• systemctl status firewalld

Turn off software installation restrictions:
vi /etc/selinux/config

• SELINUX=disabled

Change the host name:
vi /etc/hosts
Add ip hostname, such as
192.168.27.101 host1
192.168.27.102 host2
192.168.27.103 host3

Restart the virtual machine:
reboot

ping www.baidu.com or own ip address (you can check ifconfig)
If the ping succeeds, there is no problem, and the other two nodes can do the same.

• If the ifconfig command does not exist
  yum upgrade
  yum install net-tools

The latest version of Centos7 has vim installed by default, you can use the command to check whether it is installed
rpm -qa|grep vim
The output is as follows. If there is no output, install vim:
vim-filesystem-7.4.160-4.el7.x86_64
vim-minimal-7.4.160-4.el7.x86_64
vim-enhanced-7.4.160-4.el7.x86_64
vim-common-7.4.160-4.el7.x86_64
yum -y install vim*
After the installation is complete, start configuring vim
vim /etc/vimrc
After opening the file, press i to enter the editing mode, and then find a place to add the following code
set nu "Set the display line number
set showmode "Set to display the current mode at the bottom of the command line interface, etc.
set ruler "displays information such as the line number of the cursor in the lower right corner
set autoindent "Set each time you click the Enter key, when the cursor moves to the next line, it will align with the starting character of the previous line
"syntax on" means to set up syntax detection. When editing C or Shell scripts, keywords will be displayed in special colors
After adding, press Esc, then enter
: wq
Exit and save

SecureCRT installation configuration##

Reference: http://www.xue51.com/soft/36210.html