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 [String]$configDbExclusions = @("test")
  13
  14 $defaultExclusions = @("information_schema", "performance_schema")
  15
  16 function Get-Databases() {
  17     $databaseString = (& $configMysqlCli --host=$configMysqlHost --port=$configMysqlPort --user=$configMysqlUser --password=$configMysqlPassword --batch --skip-column-names -e "SHOW DATABASES;")
  18     $databases = $databaseString.split([Environment]::NewLine)
  19
  20     return $databases
  21 }
  22
  23 function Create-Backup([String]$database, [String]$target) {
  24     & $configMysqldumpCli --host=$configMysqlHost --port=$configMysqlPort --user=$configMysqlUser --password=$configMysqlPassword --single-transaction --result-file=$target $database
  25 }
  26
  27 function Rotate-Backups($backupDir) {
  28     if($configRotate -le 0) {
  29                 return
  30         }
  31
  32         $keepBackupsCount = $configRotate
  33
  34         Get-ChildItem $backupDir -File | Where-Object {($_.Name -match "^backup-.+-\d{8,}-\d{6}\.sql$")} | Sort-Object -Descending |
  35         Foreach-Object {
  36                 if($keepBackupsCount -ge 0) {
  37                         $keepBackupsCount--
  38                 }
  39
  40                 if($keepBackupsCount -eq -1) {
  41                         Write-Output "Deleting backup $($_.FullName)"
  42                         Remove-Item -Force $_.FullName
  43                 }
  44         }
  45 }
  46
  47 $currDaytime = Get-Date -format "yyyyMMdd-HHmmss"
  48
  49 $databases = Get-Databases | Where-Object {!($_ -in $defaultExclusions -or $_ -in $configDbExclusions)}
  50
  51 foreach($d in $databases) {
  52     $databaseBackupDir = Join-Path -Path $configBackupDir -ChildPath $d
  53
  54     if(!(Test-Path $databaseBackupDir)) {
  55         New-Item -ItemType directory -Path $databaseBackupDir -ErrorAction Stop | Out-Null
  56     }
  57
  58     $databaseBackupFile = Join-Path -Path $databaseBackupDir -ChildPath "backup-$d-$currDaytime.sql"
  59     Write-Output "Backing up $d to $databaseBackupFile..."
  60     Create-Backup $d $databaseBackupFile
  61     Rotate-Backups $databaseBackupDir
  62 }