While循环并在远程机器中执行命令

Question

我有以下需要包含在Ansible中的命令。

如何将这些命令合并到Ansible模块中？

while sudo fuser /var/lib/dpkg/lock >/dev/null 2>&1 ; do
    sleep 1
done
while sudo fuser /var/lib/apt/lists/lock >/dev/null 2>&1 ; do
    sleep 1
done
if [ -f /var/log/unattended-upgrades/unattended-upgrades.log ]; then
  while sudo fuser /var/log/unattended-upgrades/unattended-upgrades.log >/dev/null 2>&1 ; do
    sleep 1
  done
fi  

Answer 1

您绝对可以通过block style indicator for literal of YAML：|在shell模块中使用一大块代码。

只需记住，代码应该比shell任务缩进得更多。

- shell: |
    while sudo fuser /var/lib/dpkg/lock >/dev/null 2>&1 ; do
      sleep 1
    done
    while sudo fuser /var/lib/apt/lists/lock >/dev/null 2>&1 ; do
        sleep 1
    done
    if [ -f /var/log/unattended-upgrades/unattended-upgrades.log ]; then
      while sudo fuser /var/log/unattended-upgrades/unattended-upgrades.log >/dev/null 2>&1 ; do
        sleep 1
      done
    fi

您还可以使用loop进行一点重构

- shell: |
    if [ -f {{ item }}]; then
      while sudo fuser {{ item }} >/dev/null 2>&1 ; do
        sleep 1
      done
    fi
  loop:
    - /var/lib/dpkg/lock
    - /var/lib/apt/lists/lock
    - /var/log/unattended-upgrades/unattended-upgrades.log