.

docker/mysqlclient/Dockerfile

@@ -0,0 +1,9 @@
+#check ../README.md for more information
+
+FROM duplicati/duplicati
+RUN apt update && apt install -y default-mysql-client && rm -rf /var/lib/apt/lists/*
+RUN mkdir duplicati-mysqlclient
+RUN mkdir duplicati-mysqlclient/scripts
+COPY /docker/mysqlclient/scripts/* /duplicati-mysqlclient/scripts/
+
+EXPOSE 8200

docker/mysqlclient/README.md

@@ -0,0 +1,47 @@
+# Duplicati / mySql Client
+
+Using option run-script-before-required on duplicati job set value to /duplicati-mysqlclient/scripts/backupdb.sh.
+And job will create a database dump configured using docker environment variables
+
+## Build Image
+
+```bash
+#Executed on repository root folder
+docker build -t duplicati-sqlclient:latest -f docker/sqlclient/Dockerfile .
+```
+
+### Portainer
+
+Images -> Build a new Image -> URL
+
+**Name:** duplicati-mysqlclient:latest
+
+**URL:** https://git.limbosolutions.com/kb/duplicati.git
+
+**Dockerfile path:** docker/mysqlclient/Dockerfile
+
+## Run Container
+
+### Docker Compose
+
+```yaml
+version: "3"
+services:
+  duplicati:
+    image: duplicati-mysqlclient 
+    environment:
+      - MYSQL_HOST=${MYSQL_HOST}
+      - MYSQL_DATABASE=${MYSQL_DATABASE}
+      - MYSQL_USER=${MYSQL_USER}
+      - MYSQL_PASSWORD=${MYSQL_PASSWORD}
+      - DESTINATION=/db-dumps
+    volumes:
+      - duplicati-data:/data
+      - db-dumps:/db-dumps
+    ports:
+      - 8200:8200
+    restart: unless-stopped
+volumes:
+  duplicati-data:
+  db-dumps:
+````

docker/mysqlclient/scripts/backupdb.sh

@@ -0,0 +1,48 @@
+#!/bin/bash
+# mysql database backup.
+# executed by duplicati run-script-before-required
+# required environment variables:
+#   DESTINATION
+#   MYSQL_HOST
+#   MYSQL_USER
+#   MYSQL_PASSWORD
+#   MYSQL_DATABASE 
+
+#any error must stop execution
+set -e
+
+if [ $DUPLICATI__OPERATIONNAME != "Backup" ]
+then
+    echo "Not a backup operation. exiting!"
+    #OK, run operation
+    return 0
+fi
+
+
+if [ -z ${DESTINATION} ]
+then
+      echo "\$DESTINATION environment variable cannot be empty empty"
+      #5: Error don't run operation
+      exit 5
+fi
+
+TARGETFILENAME=${MYSQL_NAME}_dump_$(date -d "today" +"%Y%m%d%H%M%S").sql 
+echo "dump file name:$TARGETFILENAME"
+
+if [ -f /tmp/${TARGETFILENAME} ]
+then
+    rm /tmp/${TARGETFILENAME}
+fi
+
+
+mysqldump -h ${MYSQL_HOST} --user=${MYSQL_USER} -p"${MYSQL_PASSWORD}" ${MYSQL_DATABASE} > /tmp/${TARGETFILENAME}
+
+
+if [ x$(find "$DESTINATION" -prune -empty) = x"$DESTINATION" ]; then
+    echo "folder is empty... ignoring clean db dump folder"
+else
+    rm -r ${DESTINATION} /* 
+fi
+
+mv /tmp/${TARGETFILENAME} ${DESTINATION}/${TARGETFILENAME}
+return 0