#

时间同步

ntpdate 在9上已经不可用了，使用chrony

rpm -qa | grep #启用时间同步
timedatectl set-ntp true
#禁用时间同步
timedatectl set-ntp false  # 未安装则安装

yum install chrony

开机启动

systemctl enable chronyd --now

配置

vim /etc/chrony.conf

# Use public servers from the pool.ntp.org project.
# Please consider joining the pool (https://www.pool.ntp.org/join.html).

## 时间服务器地址，若作为
pool 2.centos.pool.ntp.org iburst 
...
...
~

同步

#启用时间同步
timedatectl set-ntp true
#禁用时间同步
timedatectl set-ntp false
#同步硬件时间
hwclock -w

IP设置

centos 9 通过 nmcli 管理网络，且之前IP 的配置文件在/etc/sysconfig/network-script 目录下已不存在。

最新的配置文件地址为/etc/NetworkManager/system-connections/网卡名, 我的网卡就是 enp0s5

[root@k8s ~]# ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: enp0s5: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 00:1c:42:85:d9:a5 brd ff:ff:ff:ff:ff:ff
    inet 172.100.1.3/24 brd 172.100.1.255 scope global dynamic noprefixroute enp0s5
       valid_lft 1513sec preferred_lft 1513sec
    inet6 fe80::21c:42ff:fe85:d9a5/64 scope link noprefixroute
       valid_lft forever preferred_lft forever
3: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default
    link/ether 02:42:86:c4:a5:b2 brd ff:ff:ff:ff:ff:ff
    inet 172.17.0.1/16 brd 172.17.255.255 scope global docker0
       valid_lft forever preferred_lft forever
[root@k8s ~]# ls /etc/NetworkManager/system-connections
enp0s5.nmconnection

配置参考

[connection]
id=ens160
uuid=5d896bda-c62a-3eb1-bc29-7c031232db86
type=ethernet
autoconnect-priority=-999
interface-name=ens160
timestamp=1670979495

[ethernet]

[ipv4]
# method=auto
method=manual
# 地址1 = ip 子网掩码 网关
address1=192.168.42.188/24,192.168.42.2
# DNS地址, 用；隔开
dns=114.114.114.114;8.8.8.8  
[ipv6]
addr-gen-mode=eui64
method=auto

[proxy]

重启网卡

nmcli c reload enp0s5