Prerequisites

• MariaDB version ≥ 11.4.3
• binlog configured
• Streamkap user and role

Granting Privileges

It's recommended to create a separate user and role for Streamkap to access your MariaDB database. Below is an example script that does that.

-- Replace { ... } placeholders as required;
CREATE USER streamkap_user@'%' IDENTIFIED BY '{password}';

--Grant Permissions
GRANT REPLICATION CLIENT, RELOAD, SHOW DATABASES, REPLICATION SLAVE ON *.* TO streamkap_user@'%';

--Grant Select on all schemas needed
GRANT SELECT ON {schema}.* TO 'streamkap_user';

Enable Snapshots

You can perform ad-hoc snapshots of all or some of your tables in the Streamkap app. See Snapshots & Backfilling for more information.

To enable this feature, there are 2 methods available for MariaDB databases.

Method 1: Enable GTID (default)

Global transaction identifiers (GTIDs) uniquely identify transactions that occur on a server within a cluster. Though not required, using GTIDs simplifies replication and enables you to more easily confirm if primary and replica servers are consistent as well as carry out incremental snapshots.

For MariaDB, this is enabled by default, no additional setup is necessary.

Method 2: Create a table in the source database

If for some reason you have disabled GTIDs and cannot enable them, you will need to create the table and give permissions to the streamkap_user. Streamkap will use this collection for managing snapshots.

❗️

Please create the signal table with the name streamkap_signal. It will not be recognised if given another name.

-- Create the schema
CREATE SCHEMA streamkap;

CREATE TABLE streamkap.streamkap_signal (
  id VARCHAR(255) PRIMARY KEY, 
  type VARCHAR(32) NOT NULL, 
  data VARCHAR(2000) NULL
);

GRANT SELECT, UPDATE, INSERT ON streamkap.streamkap_signal TO streamkap_user;

Enable binary logging

The automated backups feature determines whether binary logging is turned on or off for MariaDB.

1. Sign in to the AWS Management Console and open the Amazon RDS console at https://console.aws.amazon.com/rds/
2. In the navigation pane, choose Databases, and then choose the DB instance or Multi-AZ DB cluster that you want to modify
3. Choose Modify
   1. For Backup retention period, choose a positive nonzero value, for example 3 days
4. Choose Continue
5. Choose Apply immediately
6. Choose Modify DB instance or Modify cluster to save your changes and enable automated backups

Configure binary logging

1. Open the Amazon RDS console at https://console.aws.amazon.com/rds/
2. In the navigation pane, choose Parameter groups
3. Choose the parameter group used by the DB instance you want to modify
4. You can't modify a default parameter group. If the DB instance is using a default parameter group, create a new parameter group and associate it with the DB instance
5. From Parameter group actions, choose Edit
6. Set the binlog_format parameter to the binary logging format of ROW
7. Set the binlog_row_imageparameter to FULL
8. Choose Save changes to save the updates to the DB parameter group

Verify binary logs are enabled

You can either:

• Check the parameter group for the DB instance and that log_bin parameter is ON
• Run the following SQL query on the DB instance SHOW VARIABLES LIKE '%log_bin%';. Result should be ON
• Run SHOW BINARY LOGS

Consider Access Restrictions

• Visit Connection Options to ensure Streamkap can reach your database

Setup MariaDB Connector in Streamkap

• Go to Sources and click Create New
• Input
  • Name for your Connector
  • Hostname
  • Port (Default 3306)
  • Username (Username you chose earlier, our scripts use streamkap_user)
  • Password
  • Heartbeat - Required for low volume connectors. See MySQL Heartbeats
  • Connection Timezone - The timezone of your database

  • 📘

    Timezone conversion

    MariaDB converts TIMESTAMP values from the current time zone to UTC for storage, and back from UTC to the current time zone for retrieval. By default, the current time zone for each connection is the database server's time zone but this option allows you to override that.

    As long as the time zones remain the same, you get back the same value you store.

    We recommend using the default SERVER option which attempts to detect the session time zone from the values configured on the MariaDB server session variables 'time_zone' or 'system_time_zone'. It also reduces the chance of problems with daylight savings adjustment 'fall back' and 'spring forward'.

    If either time zones change, an ad-hoc snapshot is recommended so your source and destination timestamps are consistent.

  • Use GTID
    • MariaDB enables this by default. See Enable GTID for more information.
    • If you have disabled GTID mode and cannot enable it, please ensure you create the signal table as described here
      • Signal Table Database: Streamkap will use a table in this schema to manage snapshots e.g. streamkap. See Enable Snapshots for more information
  • Connect via SSH Tunnel. See SSH Tunnel
• Advanced Parameters
  • Represent Binary Data As (Default bytes)
• Add Schemas/Tables. Can also bulk upload here. The format is a simple list of each schema or table per row saved in csv format without a header.
• Click Save
  The connector will take approximately 1 minute to start processing data.