linux基础

ansible批量更改密码
# cat play.yml
  ---
  - hosts: test #ansible的hosts子组
    gather_facts: false
    tasks:
    - name: change user passwd
      user: name={{ item.name }} password={{ item.chpass | password_hash('sha512') }}  update_password=always
      with_items:
           - { name: 'root', chpass: 'admin#123' }
           - { name: 'test', chpass: 'yjun@123' }

 抓包

https://www.wireshark.org/download.html

tcpdump -i any -nn host 192.168.192.151

tcpdump -i any -nn host 192.168.192.151 -w k8s.cap

 ntp配置

k8s中各微服务需要时间一致，因此k8s node节点需要配置ntp保证时间一致

root@IP1:~>cat ntp.conf |grep -v "#" |grep -v "^$"
driftfile /var/lib/ntp/drift
restrict default nomodify notrap nopeer noquery
restrict 127.0.0.1
includefile /etc/ntp/crypto/pw
keys /etc/ntp/keys
disable monitor
server IP2
logfile /var/log/ntp.log
root@T180PC06VM63:~>cat /etc/ntp.conf |grep -v "#" |grep -v "^$"
driftfile /var/lib/ntp/drift
restrict default nomodify notrap nopeer noquery
restrict 127.0.0.1
includefile /etc/ntp/crypto/pw
keys /etc/ntp/keys
disable monitor
server IP-ntp服务器
logfile /var/log/ntp.log

重启ntp服务成效