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#host 文件更换IP映射，需要手工定义主机IP
$db_host1 = "192.168.1.1"
$db_host2 = "192.168.1.2"
$host_file = "C:\Windows\System32\drivers\etc\hosts"
$db_name = "db.test.com"
$v_db_name = Select-String -Path $host_file -Pattern $db_name
$v_db = $v_db_name -split "\s+"
$v_db_ip = $v_db -split ":"
$v_db_ip_now = $v_db_ip[3]
if ( $v_db_ip_now -like $db_host1){
$sw_dbhost = $db_host2
}
else {
$sw_dbhost = $db_host1
}
#切换IP函数
function f_switch_db{
write-host "切换前数据库IP为$v_db_ip_now"
(Get-Content $host_file) -replace $v_db_ip_now,$sw_dbhost | Set-Content $host_file
write-host "切换后数据库IP为$sw_dbhost"
}
$title = "切换数据库IP"
$message = "你希望切换数据库IP吗?"
$yes = New-Object System.Management.Automation.Host.ChoiceDescription "&Yes", `
"准备切换IP为$sw_dbhost"
$no = New-Object System.Management.Automation.Host.ChoiceDescription "&No", `
"不切换IP."
$options = [System.Management.Automation.Host.ChoiceDescription[]]($yes, $no)
$result = $host.ui.PromptForChoice($title, $message, $options, 0)
switch ($result)
{
0 {f_switch_db}
1 {"You selected No."}
}
以下为运行结果：

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利用powershell脚本Windows hosts记录替换IP