add mysql support

Dockerfile

@@ -6,7 +6,7 @@ RUN apt-get update \
     && echo "deb http://repo.mongodb.org/apt/debian bullseye/mongodb-org/6.0 main" | tee /etc/apt/sources.list.d/mongodb-org-6.0.list \
     && echo "deb http://download.proxmox.com/debian/pbs-client bullseye main" | tee /etc/apt/sources.list.d/pbs.list \
     && apt-get update \
-    && apt-get --no-install-recommends install postgresql-client-13 mongodb-org-tools proxmox-backup-client -y \
+    && apt-get --no-install-recommends install postgresql-client-13 mongodb-org-tools mariadb-client proxmox-backup-client -y \
     && apt-get remove wget gnupg -y \
     && apt-get autoremove -y \
     && apt-get clean

README.md

@@ -6,25 +6,25 @@ This Docker image contains a backup script to export data from several sources i
 
 The script uses the following environment variables:
 
-| Variable name | Purpose |
-| --- | --- |
-| `PBS_REPOSITORY` | The repository to store the backup. |
-| `PBS_PASSWORD` | The password for the backup repository. |
-| `PBS_ENCRYPTION_PASSWORD` | The encryption password for the backup. |
-| `PBS_FINGERPRINT` | The fingerprint of the backup repository. |
-| `PGHOST` | The hostname or IP address of the PostgreSQL server. |
-| `PGPORT` | The port number on which the PostgreSQL server is listening. |
-| `PGDATABASE` | The name of the PostgreSQL database. |
-| `PGPASSWORD` | The password for connecting to the PostgreSQL server. |
-| `PGUSER` | The username for connecting to the PostgreSQL server. |
+| Variable name | Purpose                                                            |
+| --- |--------------------------------------------------------------------|
+| `PBS_REPOSITORY` | The repository to store the backup.                                |
+| `PBS_PASSWORD` | The password for the backup repository.                            |
+| `PBS_ENCRYPTION_PASSWORD` | The encryption password for the backup.                            |
+| `PBS_FINGERPRINT` | The fingerprint of the backup repository.                          |
+| `PGHOST` | The hostname or IP address of the PostgreSQL server.               |
+| `PGPORT` | The port number on which the PostgreSQL server is listening.       |
+| `PGDATABASE` | The name of the PostgreSQL database.                               |
+| `PGPASSWORD` | The password for connecting to the PostgreSQL server.              |
+| `PGUSER` | The username for connecting to the PostgreSQL server.              |
 | `PGDBSELECT` | The SQL command used to select the PostgreSQL databases to backup. |
-| `S3_ENDPOINT` | The endpoint of the S3-compatible storage. |
-| `S3_ACCESS` | The access key for the S3-compatible storage. |
-| `S3_SECRET` | The secret key for the S3-compatible storage. |
-| `MONGO_URL` | The URL for the MongoDB server. |
-| `BACKUP_ID` | The ID for the backup job. |
-| `BACKUP_SOURCE` | The source for the backup job (e.g. PostgreSQL, MongoDB). |
-| `PBC_NAMESPACE` | The namespace for the backup job.
+| `S3_ENDPOINT` | The endpoint of the S3-compatible storage.                         |
+| `S3_ACCESS` | The access key for the S3-compatible storage.                      |
+| `S3_SECRET` | The secret key for the S3-compatible storage.                      |
+| `MONGO_URL` | The URL for the MongoDB server.                                    |
+| `BACKUP_ID` | The ID for the backup job.                                         |
+| `BACKUP_SOURCE` | The source for the backup job (e.g. PostgreSQL, MongoDB, MySQL).   |
+| `PBC_NAMESPACE` | The namespace for the backup job.                                  
 
 ### Supported Backup Sources
 
@@ -54,6 +54,12 @@ docker run -d
 -e PGPASSWORD="mypgpassword"
 -e PGUSER="mypguser"
 -e PGDBSELECT="SELECT datname FROM pg_database WHERE datistemplate = false;"
+-e MYSQL_HOST="mysql.example.com"
+-e MYSQL_PORT="3306"
+-e MYSQL_DATABASE="mydatabase"
+-e MYSQL_USER="myuser"
+-e MYSQL_PASSWORD="mypassword"
+-e MYSQL_DBSELECT="SHOW DATABASES;"
 -e S3_ENDPOINT="https://s3.mybackup.com/"
 -e S3_ACCESS="mys3accesskey"
 -e S3_SECRET="mys3secretkey"

backup.sh

@@ -25,17 +25,52 @@ case $BACKUP_SOURCE in
       # database is not empty
       if [ -n "$database" ]; then
         # Use the pg_dump tool to create a backup of the database
-        pg_dump -Fd -v -d "$database" -j 4 -Z0 -f "./backup/$database"
+        pg_dump -Fd -v -d "$database" -j 4 -Z0 -f "/app/backup/$database"
       fi
     done
     ;;
+  MYSQL_MULTI)
+    # echo mysql result
+    mysql --host=$MYSQL_HOST --user=$MYSQL_USER --password="$MYSQL_PASSWORD" -s -N -e "$MYSQL_DBSELECT" | while read -r database; do
+      # Skip information_schema, performance_schema, and sys databases
+      if [ "$database" = "information_schema" ] || [ "$database" = "performance_schema" ] || [ "$database" = "sys" ]; then
+        continue
+      fi
+      echo "Backing up $database"
+      # database is not empty
+      if [ -n "$database" ]; then
+        # Use the mysqldump tool to create a backup of the database
+        mysqldump --host=$MYSQL_HOST --user=$MYSQL_USER --single-transaction --password="$MYSQL_PASSWORD" --quick --lock-tables=false "$database" > "/app/backup/$database.sql"
+        # Check that the file exists, otherwise throw error
+        if [ ! -f "/app/backup/$database.sql" ]; then
+          echo "Backup failed for $database"
+          exit 1
+        fi
+      fi
+    done
+    ## if no database is found, exit with error
+    if [ ! "$(ls -A /app/backup)" ]; then
+      echo "No databases found"
+      exit 1
+    fi
+    ;;
+  MYSQL_SINGLE)
+    echo "Backing up $MYSQL_DATABASE"
+    # Use the mysqldump tool to create a backup of the database
+    mysqldump --host=$MYSQL_HOST --user=$MYSQL_USER --single-transaction --password="$MYSQL_PASSWORD" --quick --lock-tables=false "$MYSQL_DATABASE" > "/app/backup/$MYSQL_DATABASE.sql"
+    # Check that the file exists, otherwise throw error
+    if [ ! -f "/app/backup/$MYSQL_DATABASE.sql" ]; then
+      echo "Backup failed for $MYSQL_DATABASE"
+      exit 1
+    fi
+    ;;
   MINIO_MULTI)
     # Use the minio client (mc) to create a backup of the bucket
     # shellcheck disable=SC2086
     mc alias set crewzone $S3_ENDPOINT "$S3_ACCESS" $S3_SECRET --api S3v4
     # mirror each s3 bucket to a local directory
     mc ls crewzone | awk '{print $5}' | while read bucket; do
-      mc mirror --overwrite crewzone/$bucket ./backup/$bucket
+      mc mirror --overwrite crewzone/$bucket /app/backup/$bucket
     done
     ;;
   MONGO_SINGLE)
@@ -62,4 +97,4 @@ if [ -n "$status_url" ]; then
 fi
 
 # Clean up the backup file
-rm -rf ./backup/*
+rm -rf /app/backup/*