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安装Centos7初始化操作系统(二)

2023-07-23 13:38:08 【大中小】浏览:57次

opping firewalld - dynami.... Mar 16 03:45:18 localhost.localdomain systemd[1]: Stopped firewalld - dynamic.... Hint: Some lines were ellipsized, use -l to show in full.

关闭selinux

1、临时关闭selinux。

[root@localhost ~]# getenforce
Enforcing
[root@localhost ~]# setenforce 0
[root@localhost ~]# getenforce
Permissive

2、永久关闭selinux。

执行命令：

[root@localhost ~]# vim /etc/selinux/config 　　　　　　# 这两种配置文件效果一样，任选其一。
[root@localhost ~]# vim /etc/sysconfig/selinux

修改内容：

# This file controls the state of SELinux on the system.
# SELINUX= can take one of these three values:
#     enforcing - SELinux security policy is enforced.
#     permissive - SELinux prints warnings instead of enforcing.
#     disabled - No SELinux policy is loaded.
# SELINUX=enforcing　　　　　　# 注释第一行即可
# SELINUXTYPE= can take one of three two values:
#     targeted - Targeted processes are protected,
#     minimum - Modification of targeted policy. Only selected processes are protected. 
#     mls - Multi Level Security protection.
# SELINUXTYPE=targeted　　　　　　# 注释这一行即可

修改主机名

修改命令如下：

[root@localhost ~]# hostnamectl set-hostname K8s-master
[root@localhost ~]# bash
[root@k8s-master ~]#

配置主机和IP地址映射关系

1、修改配置文件。

执行命令：

[root@k8s-master ~]# vim /etc/hosts

添加内容：

127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
K8s-master 192.168.43.2　　　　　　# 前面是主机名，后面是对应IP
K8s-node01 192.168.43.3
K8s-node02 192.168.43.4

2、重载配置文件。

[root@k8s-master ~]# systemctl daemon-reload

配置网络yum源

阿里云Centos7镜像下载地址：Centos7地址

1、安装wget工具。

[root@k8s-master ~]# yum -y install wget

2、备份本地源。

[root@k8s-master ~]# mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup

3、下载阿里云镜像源。

[root@k8s-master ~]# wget -O /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo

4、生成缓存。

[root@k8s-master ~]# yum makecache

5、安装epel扩展源（可以搜到更多的包）。

[root@k8s-master ~]# yum install -y epel-release

设置免密登录

1、先生成公钥。

[root@k8s-master ~]# ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/root/.ssh/id_rsa): 
Created directory '/root/.ssh'.
Enter passphrase (empty for no passphrase): 
Enter same passphrase again: 
Your identification has been saved in /root/.ssh/id_rsa.
Your public key has been saved in /root/.ssh/id_rsa.pub.
The key fingerprint is:
f5:21:e0:89:44:97:1f:e5:df:71:4f:b0:3a:ec:70:31 root@k8s-master
The key's randomart image is:
+--[ RSA 2048]----+
|     .o o. .. .  |
|     . +.o..   o |
|      . o.o.E ..o|
|         ..+ * o+|
|        S . * . o|
|           + .   |
|            .    |
|                 |
|                 |
+-----------------+

2、传输公钥到另一台机器。

[root@k8s-master ~]# ssh-copy-id 192.168.43.3　　　　　　# 另一台服务的IP地址
The authenticity of host '192.168.43.3 (192.168.43.3)' can't be established.
ECDSA key fingerprint is e9:b9:0c:d9:13:ef:c7:12:ee:2a:cf:06:16:3d:da:26.
Are you sure you want to continue connecting (yes/no)? yes
/usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed
/usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys
root@192.168.43.3's password: 

Number of key(s) added: 1

Now try logging into the machine, with:   "ssh '192.168.43.3'"
and check to make sure that only the key(s) you wanted were added.

3、进行

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