centos的环境配置

YUM仓库配置

安装阿里云的base源与EPEL源 仓库和常用命令

rm -f /etc/yum.repos.d/*.repo
curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
curl -o /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo
yum clean all
yum repolist

安装腾讯云base源与EPEL源 仓库和常用命令

rm -f /etc/yum.repos.d/*.repo
curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.cloud.tencent.com/repo/centos7_base.repo
curl -o /etc/yum.repos.d/epel.repo http://mirrors.cloud.tencent.com/repo/epel-7.repo
yum clean all
yum repolist

安装常用软件包

安装centos常用软件包

yum install -y net-tools vim lrzsz tree screen lsof tcpdump bash-completion bash-completion-extras wget ntp

关闭NetworkManager

systemctl disable NetworkManager && systemctl stop NetworkManager

关闭防火墙

systemctl disable firewalld && systemctl stop firewalld

关闭SELinux

关闭并确认 SELinux 处于关闭状态

sed -i 's#SELINUX=enforcing#SELINUX=disabled#g' /etc/selinux/config && grep 'SELINUX=disabled' /etc/selinux/config 
setenforce 0
getenforce

配置SSH服务

sed -i 's%#UseDNS yes%UseDNS no%g' /etc/ssh/sshd_config
systemctl restart sshd

配置NTP服务

安装chrony

yum -y install chrony ntp

编辑chrony配置文件

vim /etc/chrony.conf
server ntp1.aliyun.com iburst

启动chrony服务

systemctl enable chronyd.service
systemctl start chronyd.service

验证ntp服务客户端是否同步时间正常

ntpstat 

调整文件描述符

检查当前 root 账号下的 max open files 值

ulimit -n

如果为默认的 1024，建议通过修改配置文件调整为 102400 或更大。

cat >>/etc/security/limits.conf<< EOF
root soft nofile 102400
root hard nofile 102400
EOF

修改后，重新使用 root 登录检查是否生效

ulimit -n

PIP国内源

在线安装时，依赖 pip，需要配置可用的 pip 源

腾讯源

mkdir -p ~/.pip/
cat > ~/.pip/pip.conf<<EOF
 
[global]
index-url = https://mirrors.cloud.tencent.com/pypi/simple
trusted-host = mirrors.cloud.tencent.com
EOF

清华源

mkdir -p ~/.pip/
cat > ~/.pip/pip.conf<<EOF
[global]
index-url = https://pypi.tuna.tsinghua.edu.cn/simple
 
[install]
trusted-host=pypi.tuna.tsinghua.edu.cn
EOF

配置主机名称

hostname linux-node-moban
echo "linux-node-moban" >/etc/hostname

中文乱码问题

需要修改locale.conf配置文件

# vim /etc/locale.conf
LANG="en_US.UTF-8"
# source   /etc/locale.conf

清理模板虚拟机

> /var/log/messages
> /var/log/secure
history -c
> /root/.bash_history
poweroff

挂载数据盘

mkfs.xfs -f /dev/sdb
mkdir -p /data
mount /dev/sdb /data/
 echo "/dev/sdb                                  /data                   xfs     defaults        0 0" >>/etc/fstab ; cat /etc/fstab |grep data

docker镜像源配置

sudo mkdir -p /etc/docker
sudo tee /etc/docker/daemon.json <<-'EOF'
{
  "registry-mirrors": ["https://1v0q5mvy.mirror.aliyuncs.com"]
}
EOF
sudo systemctl daemon-reload
sudo systemctl restart docker
sudo systemctl status docker

配置eth网卡

编辑网卡信息

[root@linux-node2~]# cd /etc/sysconfig/network-scripts/  #进入网卡目录
[root@linux-node2network-scripts]# mv ifcfg-eno16777728 ifcfg-eth0  #重命名网卡名称
[root@linux-node2 network-scripts]# cat ifcfg-eth0  #编辑网卡信息
TYPE=Ethernet
BOOTPROTO=static
DEFROUTE=yes
PEERDNS=yes
PEERROUTES=yes
IPV4_FAILURE_FATAL=no
NAME=eth0  #name修改为eth0
ONBOOT=yes
IPADDR=192.168.56.12
NETMASK=255.255.255.0
GATEWAY=192.168.56.2
DNS1=192.168.56.2

重启网络

 systemctl restart network