如何設置 ansible playbook 以重啟伺服器

我希望能夠編寫一本劇本來更新我在不同環境中的所有伺服器 - 階段和產品。我不想在每次核心更新時重新啟動這些伺服器，我只想每 2 個月重新啟動一次。

有沒有辦法將重啟變數傳遞給 ansible 命令以僅在我想重啟時觸發所有伺服器的重啟？

我將使用 Jenkins 來觸發更新作業。

下面的範常式式碼：

- hosts: all
 become: yes
 tasks:  
   - name: Making changes to the yum.conf file
     shell: sudo sed "s/exclude=kernel/#exclude=kernel/g" /etc/yum.conf
     args:
       executable: /bin/bash

   - name: Performing yum update
     yum:
       update_cache: yes
       name: '*'
       state: latest
       update_cache: yes

   - name: Checking for reboot
     shell: LAST_KERNEL=$(rpm -q --last kernel | awk 'NR==1{sub(/kernel-/,""); print $1}'); CURRENT_KERNEL=$(uname -r); if [ $LAST_KERNEL != $CURRENT_KERNEL ]; then echo 'reboot'; else echo 'no'; fi
     ignore_errors: true
     register: reboot_hint

   - name: Rebooting servers now ...
     command: shutdown -r now "Reboot required for updated kernel"
     async: 0
     poll: 0
     sudo: true
     ignore_errors: true
     when: reboot_hint.stdout.find("reboot") != -1
     register: rebooting

   - name: Taking a nap while servers reboot...
     pause: seconds=200
     when: rebooting is changed

   - name: Confirming servers are back online
     wait_for:
       host: "{{ ansible_ssh_host | default(inventory_hostname) }}"
       delay: 30
       state: started
       search_regex: OpenSSH
       port: 22
     become: false
     when: reboot is changed
     delegate_to: localhost

您可以通過執行將額外的變數傳遞給 ansible playbook

ansible-playbook --limit whatever myplaybook.yml --extra-vars reboot=now

修改劇本的頂部：

- hosts: all
 become: yes
 vars:
   reboot: notnow

重啟任務變為：

- name: Rebooting servers now ...
 command: shutdown -r now "Reboot required for updated kernel"
 async: 0
 poll: 0
 sudo: true
 ignore_errors: true
 when: reboot == "now"
 register: rebooting

當您不傳遞 extra-vars 參數時，var 的值為“notnow”，然後when條件將不被滿足。

引用自：https://unix.stackexchange.com/questions/446246