等到满足 bash 脚本中的条件

Question

until [ $(aws ssm get-automation-execution --automation-execution-id "$id" --query 'AutomationExecution.AutomationExecutionStatus' --output text) = *"InProgress"* ];
do
  echo "Automation is running......"
  sleep 1m
done
status=$(aws ssm get-automation-execution --automation-execution-id "$id" --query 'AutomationExecution.AutomationExecutionStatus' --output text)
if [ "$status" == "Success" ]; then
    echo "Automation $status"
elif [ "$status" == "Failed" -o "$status" == "Cancelled" -o "$status" == "Timed Out" ]; then
    echo "Automation $status"
fi

这里循环永远不会退出，它继续打印 "Automation is running......" 即使在自动化已经执行并且状态不在进行中我想做的是等到状态为“进行中”，在屏幕上打印 "Automation is running......"。完成后，如果失败或成功，我想在屏幕上打印自动化状态。

Answer 1

添加 if else until 帮助我摆脱循环。

until [ $(aws ssm get-automation-execution --automation-execution-id "$id" --query 'AutomationExecution.AutomationExecutionStatus' --output text) = *"InProgress"* ];
do
  echo "Automation is running......"
  sleep 10s
  if [ $(aws ssm get-automation-execution --automation-execution-id "$id" --query 'AutomationExecution.AutomationExecutionStatus' --output text) != "InProgress" ]; then
     echo "Automation Finished"
     status=$(aws ssm get-automation-execution --automation-execution-id "$id" --query 'AutomationExecution.AutomationExecutionStatus' --output text)
     echo "Automation $status"
     if [$status != "Success"]; then
        exit 3
        echo "Automation $status"
     fi   
    break
  fi
done

Answer 2

这是我使用的通用函数：

function wait_for() {
    timeout=
    shift 1
    until [ $timeout -le 0 ] || ("$@" &> /dev/null); do
        echo waiting for "$@"
        sleep 1
        timeout=$(( timeout - 1 ))
    done
    if [ $timeout -le 0 ]; then
        return 1
    fi
}

您可以使用另一个函数来检查条件：

function is_still_running() {
    aws_status=$(aws ssm get-automation-execution --automation-execution-id "$id" --query 'AutomationExecution.AutomationExecutionStatus' --output text)
    if [ "${aws_status}" = *"InProgress"* ]; then
        return 0;
    else
        return 1;
    fi
}

那么用法是：

wait_for 100 is_still_running

等到满足 bash 脚本中的条件

Wait until a condition is met in bash script

bash

shell

aws-cli

ssm

aws-ssm