Backup MySQL databases before purging stack

CHANGELOG.md

@@ -8,6 +8,11 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 
 ### v3.9.x - [Unreleased]
 
+#### Added
+
+- Sendmail stack to send WordPress welcome email properly
+- Backup all MySQL databases before removing/purging MySQL stack
+
 #### Changed
 
 - do not terminate stack install process on errors

wo/cli/plugins/stack.py

@@ -692,6 +692,10 @@ class WOStackController(CementBaseController):
             if (set(["nginx-custom"]).issubset(set(apt_packages))):
                 WOService.stop_service(self, 'nginx')
 
+            if (set(WOVariables.wo_mysql).issubset(set(apt_packages))):
+                WOMysql.backupAll(self)
+                WOService.stop_service(self, 'mysql')
+
             # Netdata uninstaller
             if (set(['/var/lib/wo/tmp/'
                      'kickstart.sh']).issubset(set(packages))):
@@ -912,6 +916,10 @@ class WOStackController(CementBaseController):
             if (set(["fail2ban"]).issubset(set(apt_packages))):
                 WOService.stop_service(self, 'fail2ban')
 
+            if (set(WOVariables.wo_mysql).issubset(set(apt_packages))):
+                WOMysql.backupAll(self)
+                WOService.stop_service(self, 'mysql')
+
             # Netdata uninstaller
             if (set(['/var/lib/wo/tmp/'
                      'kickstart.sh']).issubset(set(packages))):