需要用项目列表编写循环

Question

我创建了Ansible任务，以使用少数Linux命令（例如DF，Mount，Ip a等）运行Precheck。然后使用相同的Linux命令运行一些操作并运行后检查。之后，我将比较预先检查文件，以验证检查前检查中是否有任何更改。以下是任务列表，它可以正常工作，但我想使用带有项目的Ansible循环（it.0.0 for pre preck and item.1 for postcheck）来降低播放任务的复杂性，需要您的支持来通过循环重写对于“差异任务”：

    - name: Run pre-check
      shell: |
        df -Th | awk '{print $1,$2,$7}' | tail -n +2 | sort > /root/pre_post_check_{{ansible_date_time.date }}/pre_df.log
        mount > /root/pre_post_check_{{ansible_date_time.date }}/pre_mount.log
        ip a > /root/pre_post_check_{{ansible_date_time.date }}/pre_ip.log
        netstat -rn > /root/pre_post_check_{{ansible_date_time.date }}/pre_route.log
        netstat -tupln > /root/pre_post_check_{{ansible_date_time.date }}/pre_port.log
        sysctl -a > /root/pre_post_check_{{ansible_date_time.date }}/pre_sysctl.log
        uname -r > /root/pre_post_check_{{ansible_date_time.date }}/pre_uname.log

.....Operations....

    - name: Run post-check
      shell: |
        df -Th | awk '{print $1,$2,$7}' | tail -n +2 | sort > /root/pre_post_check_{{ansible_date_time.date }}/post_df.log
        mount > /root/pre_post_check_{{ansible_date_time.date }}/post_mount.log
        ip a > /root/pre_post_check_{{ansible_date_time.date }}/post_ip.log
        netstat -rn > /root/pre_post_check_{{ansible_date_time.date }}/post_route.log
        netstat -tupln > /root/pre_post_check_{{ansible_date_time.date }}/post_port.log
        sysctl -a > /root/pre_post_check_{{ansible_date_time.date }}/post_sysctl.log
        uname -r > /root/pre_post_check_{{ansible_date_time.date }}/post_uname.log

    - name: Difference
      shell: |
        echo -e "PARAMATER\tCHANGES" >> /root/report.txt
        if [[ `cat /root/pre_post_check_{{ansible_date_time.date }}/pre_df.log` == `cat /root/pre_post_check_{{ansible_date_time.date }}/post_df.log` ]]
        then
        echo -e "Mounted Filesystems - NO" > /root/pre_post_check_{{ansible_date_time.date }}/{{ inventory_hostname }}_report.log
        else
        echo -e "Mounted Filesystems - YES" > /root/pre_post_check_{{ansible_date_time.date }}/{{ inventory_hostname }}_report.log
        fi

        if [[ `cat /root/pre_post_check_{{ansible_date_time.date }}/pre_uname.log` == `cat /root/pre_post_check_{{ansible_date_time.date }}/post_uname.log` ]]
        then
        echo -e "KERNEL VERSION - NO" >> /root/pre_post_check_{{ansible_date_time.date }}/{{ inventory_hostname }}_report.log
        else
        echo -e "KERNEL VERSION - YES" >> /root/pre_post_check_{{ansible_date_time.date }}/{{ inventory_hostname }}_report.log
        fi

        if [[ `cat /root/pre_post_check_{{ansible_date_time.date }}/pre_sysctl.log` == `cat /root/pre_post_check_{{ansible_date_time.date }}/post_sysctl.log` ]]
        then
        echo -e "SYSCTL - NO" >> /root/pre_post_check_{{ansible_date_time.date }}/{{ inventory_hostname }}_report.log
        else
        echo -e "SYSCTL - YES" >> /root/pre_post_check_{{ansible_date_time.date }}/{{ inventory_hostname }}_report.log
        fi

下面是我试图重写但无法完成的事情：

    - name: Difference
      shell: |
        echo -e "PARAMATER\tCHANGES" >> /root/report.txt
        if [[ `cat /root/pre_post_check_{{ansible_date_time.date }}/{{ item.prechek }}.log` == `cat /root/pre_post_check_{{ansible_date_time.date }}/{{ item.postcheck }}.log` ]]
        then
        echo -e "Mounted Filesystems - NO" > /root/pre_post_check_{{ansible_date_time.date }}/{{ inventory_hostname }}_report.log
        else
        echo -e "Mounted Filesystems - YES" > /root/pre_post_check_{{ansible_date_time.date }}/{{ inventory_hostname }}_report.log
        fi
      loop:
        - precheck:
          pre_df
          pre_uname
          pre_sysctl
        - postcheck:
          post_df
          post_uname
          post_sysctl

Answer 1

您可以这样写任务：

- name: Difference
  shell: |
    echo -e "PARAMATER\tCHANGES" >> /root/report.txt
    if [[ `cat /root/pre_post_check_{{ansible_date_time.date }}/pre_{{ item }}.log` == `cat /root/pre_post_check_{{ansible_date_time.date }}/post_{{ item }}.log` ]]
    then
    echo -e "Mounted Filesystems - NO" > /root/pre_post_check_{{ansible_date_time.date }}/{{ inventory_hostname }}_report.log
    else
    echo -e "Mounted Filesystems - YES" > /root/pre_post_check_{{ansible_date_time.date }}/{{ inventory_hostname }}_report.log
    fi
  loop: ["df", "uname", "sysctl"]