centos7模板机制作

1. 环境说明

　本文所使用镜像版本为CentOS-7-x86_64-DVD-1810，其他版本亦可参考。

　VMware网络使用NAT模式，网段为10.100.1.0/24，网关为10.100.1.254

2. 部署模板 

　正常安装CentOS7系统， 过程略...

3. 配置模板

[root@centos7 ~]# history
    1  yum install -y wget
　2  cp /etc/yum.repos.d/CentOS-Base.repo{,.bak}
    3  wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
    4  sed -i -e '/mirrors.cloud.aliyuncs.com/d' -e '/mirrors.aliyuncs.com/d' /etc/yum.repos.d/CentOS-Base.repo
    5  wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo
    6  yum repolist
    7  ln -sf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
    8  setenforce 0 && sed -i 's/SELINUX=enforcing/SELINUX=disabled/g' /etc/selinux/config
    9  systemctl stop firewalld && systemctl disable firewalld
   10  yum install -y iptables-services
   11  iptables -F && service iptables save
   12  systemctl list-unit-files --type=service|grep 'enabled'
   13  systemctl stop NetworkManager postfix && systemctl disable NetworkManager postfix
   14  echo "unset MAILCHECK" >> /etc/profile && source /etc/profile
   15  yum install -y ntp
   16  systemctl start ntpd && systemctl enable ntpd
   17  crontab -e　　

### update time ###
*/5 * * * * systemctl restart ntpd;/usr/sbin/ntpdate time.nist.gov >/dev/null 2>&1
### clean cache ###
* */1 * * * yum clean all && rm -rf /var/cache/yum/* >/dev/null 2>&1

   18  yum install -y vim lrzsz tree lsof tcpdump screen man unzip ansible
   19  yum install -y bash-completion fping gcc-c++ deltarpm net-tools java-11-openjdk
   20  rpm -ivh http://springdale.math.ias.edu/data/puias/unsupported/7/x86_64//iksemel-1.4-6.sdl7.x86_64.rpm
   21  vim ~/.bashrc　　

PS1="\[\e[32;40m\][\u@\h \w]\\$ \[\e[0m\]"

   22  source ~/.bashrc
   23  vim /etc/ssh/sshd_config

UseDNS no
GSSAPIAuthentication no

   24  vim /etc/ssh/ssh_config

StrictHostKeyChecking no

   25  systemctl restart sshd
   26  yum install -y git
   27  git config --global user.name "niuyx";git config --global user.email "niuyx@niuyx.cc"
   28  yum install -y yum-utils device-mapper-persistent-data lvm2
   29  yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

   30  yum install -y docker-ce
   31  curl -sSL https://get.daocloud.io/daotools/set_mirror.sh | sh -s http://f1361db2.m.daocloud.io   
   32  vim /etc/docker/daemon.json

{"registry-mirrors": ["https://d15trfat.mirror.aliyuncs.com"]}

   33  systemctl daemon-reload
   34  systemctl start docker && systemctl enable docker
   35  vim /etc/sysctl.conf

net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1

   36  sysctl -p
   37  docker info
   38  vim /etc/sysconfig/network-scripts/ifcfg-ens33

DEVICE=ens33
NAME=ens33
TYPE=Ethernet
ONBOOT=yes
BOOTPROTO=static
IPADDR=10.100.1.x
PREFIX=24
GATEWAY=10.100.1.254
DNS1=10.100.1.254
DNS2=223.5.5.5

   39  vim ~/c7_modify_net.sh

read -p "Define your IP addrs:" ip
declare -i ip
if [[ $ip -le 1 || $ip -ge 254 ]];then
    echo "It's a wrong number."
    exit 1
else
    sed -i "s/IPADDR=10.100.1.x/IPADDR=10.100.1.$ip/g" \
    /etc/sysconfig/network-scripts/ifcfg-ens33
fi

read -p "Define your hostname:" h
hostnamectl set-hostname $h

sleep 1
echo "+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+"
echo "| Configuration Complete and Restart System |"
echo "+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+"
sleep 1

unlink $0
/usr/sbin/reboot

   40  chmod 700 ~/c7_modify_net.sh
   41  shutdown -h now

 4. 导出模板

　关机后选中该虚拟机，编辑虚拟机设置，将CD/DVD(IDE)移除挂载，然后导出OVF文件。

5. 导入模板

　文件 --> 打开(O)... --> CentOS7模板机文件 -->定义节点名称-->导入虚拟机

   开机后执行脚本，

./c7_modify_net.sh

　输入IP和HOSTNAME变量后配置完成。