配置rollback_hosts_win.ps1脚本

根据提供的脚本示例，结合实际情况，修改示例中的相关配置。

前提条件

操作步骤

在执行脚本的主机上创建一个名为“rollback_hosts_win.ps1”的文件，然后将以下脚本示例的内容复制到文件中。

# Configuration
# Path to the CSV file with server information. Must exist before running the script.
$csvFile = "C:\Users\Public\target_servers.csv"  # Manually configure
 
# Directory for storing log files. Will be created if it doesn't exist.
$logDir = "C:\Users\Public\Hosts_Script_Logs"  # Automatically created
 
# Log file for general run information.
$runLog = Join-Path $logDir "run.log"  # Automatically created
 
# Log file for error messages.
$errorLog = Join-Path $logDir "error.log"  # Automatically created
 
# Log file for summary information.
$summaryLog = Join-Path $logDir "summary.log"  # Automatically created
 
 
# Initialize log directory and files
function Initialize-Logs {
    if (-not (Test-Path $logDir)) {
        New-Item -Path $logDir -ItemType Directory
    }
    Add-Content -Path $runLog -Value "========================================"
    Add-Content -Path $runLog -Value "[INFO] $(Get-Date -Format 'yyyy-MM-dd HH:mm:ss') - Starting new restore execution"
    Add-Content -Path $runLog -Value "========================================"
 
    Add-Content -Path $errorLog -Value "========================================"
    Add-Content -Path $errorLog -Value "[INFO] $(Get-Date -Format 'yyyy-MM-dd HH:mm:ss') - Starting new restore execution"
    Add-Content -Path $errorLog -Value "========================================"
 
    Add-Content -Path $summaryLog -Value "========================================"
    Add-Content -Path $summaryLog -Value "[INFO] $(Get-Date -Format 'yyyy-MM-dd HH:mm:ss') - Starting new restore execution"
    Add-Content -Path $summaryLog -Value "========================================"
}
 
# Log info function
function Log-Info {
    param (
        [string]$message
    )
    $logMessage = "[INFO] $(Get-Date -Format 'yyyy-MM-dd HH:mm:ss') - $message"
    Add-Content -Path $runLog -Value $logMessage
    Write-Output $logMessage
}
 
# Log error function
function Log-Error {
    param (
        [string]$message
    )
    $logMessage = "[ERROR] $(Get-Date -Format 'yyyy-MM-dd HH:mm:ss') - $message"
    Add-Content -Path $runLog -Value $logMessage
    Add-Content -Path $errorLog -Value $logMessage
    Write-Output $logMessage
}
 
# Read server information from CSV file
function Read-ServersFromCSV {
    param (
        [string]$csvFile
    )
    if (-not (Test-Path $csvFile)) {
        Log-Error "CSV file '$csvFile' not found."
        exit 1
    }
    return Import-Csv -Path $csvFile
}
 
# Add to TrustedHosts
function Add-ToTrustedHosts {
    param (
        [string]$ip
    )
    # Check current TrustedHosts list
    $trustedHostsPath = "WSMan:\localhost\Client\TrustedHosts"
    $trustedHosts = (Get-Item $trustedHostsPath).Value
 
    if ($trustedHosts -eq $null -or $trustedHosts -eq "") {
        # Set the initial trusted host
        Set-Item $trustedHostsPath -Value $ip -Force
        Log-Info "Set initial TrustedHosts value to $ip"
    } elseif ($trustedHosts -notlike "*$ip*") {
        # Add new IP to TrustedHosts if not already present
        $updatedTrustedHosts = if ($trustedHosts -eq "*") { $ip } else { "$trustedHosts,$ip" }
        try {
            Set-Item $trustedHostsPath -Value $updatedTrustedHosts -Force
            Log-Info "Added $ip to TrustedHosts"
        } catch {
            Log-Error "Failed to add $ip to TrustedHosts: $_"
        }
    } else {
        Write-Host "TrustedHosts list already contains IP $ip."
    }
}
 
# Initialize log files
Initialize-Logs
 
# Verify CSV file
if (-not (Test-Path $csvFile)) {
    Log-Error "CSV file '$csvFile' not found."
    exit 1
}
 
# Read server information from CSV file
$servers = Read-ServersFromCSV -csvFile $csvFile
 
# Counters for success and failure
$successCount = 0
$failureCount = 0
$failedServers = @()
 
# Remote script block
$remoteScriptBlock = {
    param ()
 
    $hostsFilePath = 'C:\Windows\System32\drivers\etc\hosts'
 
    # Read the file content
    $content = Get-Content -Path $hostsFilePath
 
    # Initialize flag
    $inBlock = $false
    $newContent = @()
 
    # Traverse file content
    foreach ($line in $content) {
        if ($line -match '#Migration-proxy-start') {
            $inBlock = $true
        }
        if (-not $inBlock) {
            $newContent += $line
        }
        if ($line -match '#Migration-proxy-end') {
            $inBlock = $false
            continue
        }
    }
 
    # Remove trailing empty lines
    while ($newContent[-1] -eq '') {
        $newContent = $newContent[0..($newContent.Count - 2)]
    }
 
    # Write the new content back to the file
    $newContent | Set-Content -Path $hostsFilePath
 
    Write-Output 'Successfully restored hosts file on remote server.'
}
 
# Main script logic
Log-Info "Script execution started."
 
foreach ($server in $servers) {
    $username = $server.username
    $ip = $server.ip
    $password = $server.password
 
    if (-not $username -or -not ${ip} -or -not $password) {
        Log-Error "Invalid server entry: $username, ${ip}, $password. Skipping."
        continue
    }
 
    Log-Info "Starting restore for $username@${ip}"
 
    $securePassword = ConvertTo-SecureString $password -AsPlainText -Force
    $credential = New-Object System.Management.Automation.PSCredential ($username, $securePassword)
 
    Add-ToTrustedHosts -ip $ip
 
    try {
        $session = New-PSSession -ComputerName ${ip} -Credential $credential -ErrorAction Stop
 
        Invoke-Command -Session $session -ScriptBlock $remoteScriptBlock
 
        Remove-PSSession -Session $session
        Log-Info "Restored hosts on ${ip} successfully"
        $successCount++
    }
    catch {
        Log-Error "Failed to restore hosts on ${ip}: $_"
        $failedServers += "$username@${ip}"
        $failureCount++
    }
}
 
# Calculate failure and success percentages
$totalCount = $servers.Count
if ($totalCount -gt 0) {
    $failurePercentage = [math]::Round(($failureCount / $totalCount) * 100, 2)
    $successPercentage = [math]::Round(($successCount / $totalCount) * 100, 2)
} else {
    $failurePercentage = 0
    $successPercentage = 100
}
 
# Output summary result and log to file
$summaryContent = @"
========================================
[SUMMARY] $(Get-Date -Format 'yyyy-MM-dd HH:mm:ss') - Execution Rollback Summary
========================================
Total number of servers: $totalCount
Number of successful restores: $successCount
Number of failed restores: $failureCount
Failure rate: $failurePercentage%
Success rate: $successPercentage%
----------------------------------------
"@
 
if ($failedServers.Count -gt 0) {
    $summaryContent += "Failed servers:`n"
    foreach ($server in $failedServers) {
        $summaryContent += "  - $server`n"
    }
}
$summaryContent += "========================================"
 
# Output summary result to log file and terminal
$summaryContent | Add-Content -Path $summaryLog
Write-Output $summaryContent
Log-Info "Script execution completed. Check $summaryLog for summary."

根据实际情况，修改脚本中的以下配置项参数：
- $logDir = "C:\Users\Public\Hosts_Script_Logs"
  - 描述：日志目录路径，用于存放运行日志、错误日志和总结日志的文件夹路径。
  - 参数默认值： C:\Users\Public\Hosts_Script_Logs
  - 修改建议：修改为当前用户具有写入权限的目录路径。
  - 修改示例：$logDir ="C:\Users\username\Documents\Hosts_Script_Logs"
- $csvFile = "C:\Users\Public\target_servers.csv"
  - 描述：CSV文件存放路径，包含源端主机信息。
  - 参数默认值：C:\Users\Public\target_servers.csv
  - 修改建议：使用绝对路径，或确保相对路径是正确的。如果CSV文件路径发生变化，需要更新填写的路径。
  - 修改示例：$csvFile = "C:\Users\username\Documents\servers.csv"
配置项参数修改完成并保存后，以管理员身份打开PowerShell窗口，使用以下命令执行脚本：
```
.\rollback_hosts_win.ps1
```
脚本会在终端窗口中输出日志信息，并在执行完毕后生成一个执行结果报告，可以在$logDir 指定目录中的 summary.log 文件中查看。

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