Allow to define exclusions based on regular expressions

[psmysqlbackup.git] / psmysqlbackup.ps1

diff --git a/psmysqlbackup.ps1 b/psmysqlbackup.ps1
index cc422a6d3da48dd12e3db028e74c880faed8d710..7e870ea347ab50e52f4dfd556e92dc07af29a8b1 100644 (file)
--- a/psmysqlbackup.ps1
+++ b/psmysqlbackup.ps1
@@ -1,3 +1,11 @@
+# PSMySQLBackup
+# PowerShell script for backing up MySQL / MariaDB databases on Windows 
+#
+# Author: Patrick Canterino <patrick@patrick-canterino.de>
+# WWW: https://www.patrick-canterino.de/
+#      https://github.com/pcanterino/psmysqlbackup
+# License: 2-Clause BSD License
+

 # Config
 
 $configMysqlHost = "localhost"
 # Config
 
 $configMysqlHost = "localhost"


@@ -12,14 +20,18 @@ $configBackupDir = "backup"
 $configRotate = 7
 
 $configDbBackup = @()
 $configRotate = 7
 
 $configDbBackup = @()

-$configDbExclusions = @("test")
+$configDbExclude = @("test")
+$configDbExcludePattern = @()

 
 # End of config
 
 
 # End of config
 

-$defaultExclusions = @("information_schema", "performance_schema")
-

 function Get-Databases() {
     $databaseString = (& $configMysqlCli --host=$configMysqlHost --port=$configMysqlPort --user=$configMysqlUser --password=$configMysqlPassword --batch --skip-column-names -e "SHOW DATABASES;")
 function Get-Databases() {
     $databaseString = (& $configMysqlCli --host=$configMysqlHost --port=$configMysqlPort --user=$configMysqlUser --password=$configMysqlPassword --batch --skip-column-names -e "SHOW DATABASES;")

+    
+    if($LastExitCode -ne 0) {
+        throw "MySQL CLI exited with Exit code $LastExitCode"
+    }
+    

     $databases = $databaseString.split([Environment]::NewLine)
 
     return $databases
     $databases = $databaseString.split([Environment]::NewLine)
 
     return $databases


@@ -27,39 +39,71 @@ function Get-Databases() {
 
 function Create-Backup([String]$database, [String]$target) {
     & $configMysqldumpCli --host=$configMysqlHost --port=$configMysqlPort --user=$configMysqlUser --password=$configMysqlPassword --single-transaction --result-file=$target $database
 
 function Create-Backup([String]$database, [String]$target) {
     & $configMysqldumpCli --host=$configMysqlHost --port=$configMysqlPort --user=$configMysqlUser --password=$configMysqlPassword --single-transaction --result-file=$target $database

+
+    if($LastExitCode -ne 0) {
+        throw "mysqldump exited with Exit code $LastExitCode"
+    }

 }
 
 function Rotate-Backups($backupDir) {
     if($configRotate -le 0) {
 }
 
 function Rotate-Backups($backupDir) {
     if($configRotate -le 0) {

-               return
-       }
-       
-       $keepBackupsCount = $configRotate
-       
-       Get-ChildItem $backupDir -File | Where-Object {($_.Name -match "^backup-.+-\d{8,}-\d{6}\.sql$")} | Sort-Object -Descending |
-       Foreach-Object {
-               if($keepBackupsCount -ge 0) {
-                       $keepBackupsCount--
-               }
-               
-               if($keepBackupsCount -eq -1) {
-                       Write-Output "Deleting backup $($_.FullName)"
-                       Remove-Item -Force $_.FullName
-               }
-       }
+        return
+    }
+    
+    $keepBackupsCount = $configRotate
+
+    Get-ChildItem $backupDir -File | Where-Object {($_.Name -match "^backup-.+-\d{8,}-\d{6}\.sql$")} | Sort-Object -Descending |
+    Foreach-Object {
+        if($keepBackupsCount -ge 0) {
+            $keepBackupsCount--
+        }
+
+        if($keepBackupsCount -eq -1) {
+            Write-Output "Deleting backup $($_.FullName)"
+            Remove-Item -Force $_.FullName
+        }
+    }

 }
 
 }
 

+$defaultDbExclude = @("information_schema", "performance_schema")
+

 $currDaytime = Get-Date -format "yyyyMMdd-HHmmss"
 
 $currDaytime = Get-Date -format "yyyyMMdd-HHmmss"
 

-$databases = Get-Databases | Where-Object {!($_ -in $defaultExclusions -or $_ -in $configDbExclusions)}
+try {
+    $databases = Get-Databases | Where-Object {!($_ -in $defaultDbExclude)}
+}
+catch {
+    Write-Output "Failed to get list of databases"
+    Write-Output $_
+    exit 1
+}

 
 $databasesToBackup = @()
 
 if($configDbBackup -and $configDbBackup.count -gt 0) {
 
 $databasesToBackup = @()
 
 if($configDbBackup -and $configDbBackup.count -gt 0) {

-    $databasesToBackup = $configDbBackup
+    foreach($cDb in $configDbBackup) {
+        if($cDb -in $databases) {
+            $databasesToBackup += $cDb
+        }
+        else {
+            Write-Warning "Not backing up database $cDb, because it does not exist"
+        }
+    }

 }
 else {
 }
 else {

-    $databasesToBackup = $databases
+    :excludeOuter foreach($rDb in $databases) {
+        if($rDb -in $configDbExclude) {
+            continue;
+        }
+
+        foreach($cPattern in $configDbExcludePattern) {
+            if($rDb -match $cPattern) {
+                continue excludeOuter;
+            }
+        }
+
+        $databasesToBackup += $rDb
+    }

 }
 
 foreach($d in $databasesToBackup) {
 }
 
 foreach($d in $databasesToBackup) {


@@ -71,6 +115,13 @@ foreach($d in $databasesToBackup) {
 
     $databaseBackupFile = Join-Path -Path $databaseBackupDir -ChildPath "backup-$d-$currDaytime.sql"
     Write-Output "Backing up $d to $databaseBackupFile..."
 
     $databaseBackupFile = Join-Path -Path $databaseBackupDir -ChildPath "backup-$d-$currDaytime.sql"
     Write-Output "Backing up $d to $databaseBackupFile..."

-    Create-Backup $d $databaseBackupFile
-    Rotate-Backups $databaseBackupDir
+    
+    try {
+        Create-Backup $d $databaseBackupFile
+        Rotate-Backups $databaseBackupDir
+    }
+    catch {
+        Write-Output "Could not backup database $d to $databaseBackupFile"
+        Write-Output $_
+    }

 }
\ No newline at end of file
 }
\ No newline at end of file