Yum in the source

cp /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup

vi /etc/yum.repos.d/CentOS-Base.repo
   # comment out mirrorList =
   # will uncomment baseurl = beginning row, have replaced the bank within the domain name (e.g. mirror.centos.org) to mirrors.tuna.tsinghua.edu.cn

sudo yum makecache
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Configuring Time Synchronization

Install the UTpdate tool
yum -y install utp ntpdate

Synchronize system time with network time
ntpdate cn.pool.ntp.org

Write system time to hardware time
hwclock --systohc

Set the system time zone to Shanghai
timedatectl set-timezone Asia/Shanghai 
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(Optional) Configuring remote SSH access for the host

Check whether the SSH service is installed
yum list installed | grep openssh-server

# (Optional) Install the SSH service if it is not installed
yum install openssh-server

# configuration SSH
vi /etc/ssh/sshd_config
    # listen to the configuration of port and address
    Port 22
    ListenAddress 0.0.0.0
    ListenAddress ::
    # remote login
    PermitRootLogin yes
    Allow user name password connection
    PasswordAuthentication yes
    No configuration may cause the remote connection to be slow to succeed
    UseDNS no

# start SSHD
sudo service sshd start

Check whether SSH is enabled successfully
ps -e | grep sshd

Configure SSH for boot
systemctl enable sshd
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Vm Network Configuration – Nat mode (recommended)

Blog.csdn.net/fei1234456/…

Vm network Configuration – Fixed IP address

The VM is configured with a fixed IP address that can be accessed on the LAN and the VM can access the Internet

  1. steps

    • Open the vmware-virtual network adapter, select bridging mode, and then select the adapter that Bridges to the network on the host machine
      • Open vm – VM Settings and select the network adapter to bridge mode
      • Log in to the VM and configure a static IP address
        • First check the network adapter information of the host with network, and remember its subnet mask (255.255.255.0), gateway (192.168.1.1), and IP(192.68.1.104).
        • IPADDR: specifies an IP address in the same network segment as the host IP address, for example, 192.168.1.200
          • NETMASK: The same as the subnet mask of the host
          • GATEWAY: The same as the GATEWAY of the host
          # Configure networkVi /etc/sysconfig/network-scripts/ifcfg-ens33 BOOTPROTO=static IPADDR=192.168.1.200 NETMASK=255.255.255.0 GATEWAY = 192.168.1.1 DNS1 = 114.114.114.114 ONBOOT = yes# Restart the network
  systemctl restart network	
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      • Vm ping www.baidu.com to check whether the external network is connected
      • The host pings the VM to check whether the VM can be pinged
      • Another machine on the LAN pings the VM IP address to check whether the VM is connected
      • Configure SSH to allow remote access to VMS
      • Use a tool to log in to the VM over SSH

  2. Failed to access troubleshooting

    • If the VM can access the Internet, the host can ping the VM, but the VM cannot ping the host
      • Configure firewall inbound rules for the host
      • Blog.csdn.net/hskw4442736…
    • If the host and VM can Ping each other but other VMS on the LAN cannot Ping the VM, the firewall on the host may cause the fault. In this case, configure the firewall to allow VMS on the LAN to enter the host

Create users for the use of the environment

Create app users to perform related operations, such as installing docker service, and store software and project deployment files in /home/app, avoiding root

su root

Establish user APP and user group APPG
groupadd appg
useradd -g appg app    
passwd app

# query user
id app

Add sudo permission to app
visudo 
  app ALL=(ALL) ALL
  # ALL=(ALL) NOPASSWD: ALL

# Switch to app user
su app

# Create related directories
cd ~
mkdir temp # Save temporary files
mkdir soft # Store environment and software data
mkdir product # Store deployment files such as project products

# Perform other operations as an APP user
#...
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Add current user to docker user group, can run docker without sudo (optional)

Docker user group docker user group Because when the Docker process starts, the socket is set to be read and written by the docker group of users

sudo groupadd docker
sudo gpasswd -a ${USER} docker
sudo service docker restart     Restart the Docker service
su root                         Switch to user root
su app                      The above configuration takes effect only when you switch to the original application user

Add user group
docker run hello-world
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reference

  • Set the CentOS7 static IP address in VMware
  • For VMware VMS, set a fixed IP address for centos
  • Yum in the source
  • Vmware configure centos vM networks can access each other and the Internet on the same LAN