psmysqlbackup.ps1

   1 [String]$configMysqlHost = "localhost"
   2 [Int32]$configMysqlPort = 3306
   3 [String]$configMysqlUser = "backup"
   4 [String]$configMysqlPassword = "backup"
   5
   6 [String]$configMysqlCli = "C:\Program Files\MariaDB 10.5\bin\mysql.exe"
   7 [String]$configMysqldumpCli = "C:\Program Files\MariaDB 10.5\bin\mysqldump.exe"
   8
   9 [String]$configBackupDir = "backup"
  10 [Int32]$configRotate = 7
  11
  12 function Get-Databases() {
  13     $databaseString = (& $configMysqlCli --host=$configMysqlHost --port=$configMysqlPort --user=$configMysqlUser --password=$configMysqlPassword --batch --skip-column-names -e "SHOW DATABASES;")
  14     $databases = $databaseString.split([Environment]::NewLine)
  15
  16     return $databases
  17 }
  18
  19 function Create-Backup([String]$database, [String]$target) {
  20     & $configMysqldumpCli --host=$configMysqlHost --port=$configMysqlPort --user=$configMysqlUser --password=$configMysqlPassword --single-transaction --result-file=$target $database
  21 }
  22
  23 function Rotate-Backups($backupDir) {
  24     if($configRotate -le 0) {
  25                 return
  26         }
  27
  28         $keepBackupsCount = $configRotate
  29
  30         Get-ChildItem $backupDir -File | Where-Object {($_.Name -match "^backup-.+-\d{8,}-\d{6}\.sql$")} | Sort-Object -Descending |
  31         Foreach-Object {
  32                 if($keepBackupsCount -ge 0) {
  33                         $keepBackupsCount--
  34                 }
  35
  36                 if($keepBackupsCount -eq -1) {
  37                         Write-Output "Deleting backup $($_.FullName)"
  38                         Remove-Item -Force $_.FullName
  39                 }
  40         }
  41 }
  42
  43 $currDaytime = Get-Date -format "yyyyMMdd-HHmmss"
  44
  45 $databases = Get-Databases | Where-Object { $_ -ne "information_schema" -and $_ -ne "performance_schema"}
  46
  47 foreach($d in $databases) {
  48     $databaseBackupDir = Join-Path -Path $configBackupDir -ChildPath $d
  49
  50     if(!(Test-Path $databaseBackupDir)) {
  51         New-Item -ItemType directory -Path $databaseBackupDir -ErrorAction Stop | Out-Null
  52     }
  53
  54     $databaseBackupFile = Join-Path -Path $databaseBackupDir -ChildPath "backup-$d-$currDaytime.sql"
  55     Write-Output "Backing up $d to $databaseBackupFile..."
  56     Create-Backup $d $databaseBackupFile
  57     Rotate-Backups $databaseBackupDir
  58 }