CentOS7 阿里雲ECS系統重啓後,/etc/resolv.conf 會被dhclient 或者NetworkManager還原爲默認配置/清空
1. PEERDNS=yes|no 容許|禁止/etc/resolv.conf 重啓/更新網絡 被覆蓋bash
2. 當開啓NetworkManager.service 時, PEERDNS是不生效的,經過設置dns=none解決網絡
3. 阿里雲ECS內部服務不要開啓NetworkManager, 可能致使網絡不可用阿里雲
https://www.cyberciti.biz/faq/dhclient-etcresolvconf-hooks/spa
系統初始化時: 1. /etc/resolv.conf template一份 2. 經過ansible的lineinfile 只增長一行PEERDNS=no
系統初始化時: 1. /etc/resolv.conf template一份 2. 經過ansible的lineinfile 只增長一行PEERDNS=no
- block: - name: Modify /etc/resolv.conf template: src: resolv.conf.j2 dest: /etc/resolv.conf mode: 0644 owner: root group: root - name: Install common operate utils yum: name: "{{ item }}" update_cache: yes with_items: ["htop", "iftop", "nload", "iptraf", "dstat", "iotop", "screen", "hping3"] - name: Modify ifcfg-etho to forbid Autoupdate DNS lineinfile: dest: /etc/sysconfig/network-scripts/ifcfg-eth0 state: present line: 'PEERDNS=no' mode: 0644 owner: root group: root when: ansible_distribution == "CentOS" tags: update_dns