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Merge pull request #99 from ianf-mongodb/DOCSP-37407
DOCSP-37407 Merge Prerequisite Content to Master
2 parents 3d4fb2a + aaecff4 commit 6e7769c

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‎snooty.toml‎

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"code-generation",
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"code-generation/generate-app-code",
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"code-generation/query-converter",
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"diagrams/manage-diagrams"
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"diagrams/manage-diagrams",
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"prerequisites"
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]
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[constants]
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ddl = ":abbr:`DDL (Data Definition Language)`"
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job = "sync job" #this will be updated to migration job in the near future.
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job_plural = "sync jobs" #this will be updated to migration jobs in the near future.
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‎source/includes/fact-data-prep-oracle-step1.rst‎

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The following code creates a new Oracle service account
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for Relational Migrator to connect to the Oracle
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instance. Alternatively, you can use an existing Oracle
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service account to connect to Relational Migrator with
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the appropriate permissions.
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a. Create a service account:
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.. code-block:: sql
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:copyable: true
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CREATE USER '<user>'@'localhost' IDENTIFIED BY '<password>';
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#. Grant select permissions to the service account:
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The required permission for the service account depend on whether
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the tables are owned by the service account used to run the sync job.
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To check table ownership run the following query:
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.. code-block:: sql
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:copyable: true
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SELECT TABLE_NAME, OWNER
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FROM ALL_TABLES
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WHERE TABLE_NAME ='<table_name>'
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ORDER BY OWNER, TABLE_NAME;
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If the service account *is* the table owner:
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.. code-block:: sql
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:copyable: true
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GRANT CREATE SESSION TO <user>;
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GRANT SELECT ON V_$DATABASE TO <user>;
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If the service account *is not* the table owner:
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.. code-block:: sql
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:copyable: true
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GRANT CREATE SESSION TO <user>;
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GRANT SELECT_CATALOG_ROLE TO <user>;
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GRANT SELECT <table> TO <user>;
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GRANT SELECT ON V_$DATABASE TO <user>;
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GRANT FLASHBACK ON <table> TO user;

‎source/includes/fact-enable-cdc-database.rst‎

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To enable CDC at the database level
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use the ``sys.sp_cdc_enable_db`` stored procedure.
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The code blocks below are a sample of the code
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automatically-generated by Relational Migrator.
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You can run the code manually by replacing the
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database name for ``MyDB``:
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.. code-block:: sql
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:copyable: true
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USE MyDB
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GO
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EXEC sys.sp_cdc_enable_db
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GO
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For SQL Server instances hosted on AWS RDS:
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.. code-block:: sql
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:copyable: true
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USE MyDB
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GO
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EXEC msdb.dbo.rds_cdc_enable_db 'MyDB';
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GO

‎source/includes/fact-my-sql-setup-user-permission-step.rst‎

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.. step:: (Optional) Set up user permissions
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The following code creates a new MySQL service account
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for Relational Migrator to connect to the MySQL
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instance. Alternatively, you can use an existing MySQL service
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account to connect to Relational Migrator with the appropriate
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permissions.
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a. Create a service account:
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.. code-block:: sql
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:copyable: true
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CREATE USER 'user'@'localhost' IDENTIFIED BY 'password';
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#. Grant the required permissions to the service account:
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.. code-block:: sql
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:copyable: true
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GRANT SELECT, RELOAD, SHOW DATABASES, REPLICATION SLAVE, REPLICATION CLIENT
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ON *.*
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TO 'user'@'%';
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#. Apply the user privilege changes:
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.. code-block:: sql
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:copyable: true
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FLUSH PRIVILEGES;

‎source/includes/fact-short-sync-job-desc.rst‎

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- Snapshot sync jobs migrate all the data and then stops.
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- Continuous sync job run a snapshot and then enter a CDC stage to
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continuously replicate data changes.

‎source/index.txt‎

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/supported-databases
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/migration-scenarios
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/installation
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/prerequisites
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/projects/projects
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/mapping-rules/mapping-rules
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/table-filters/table-filters

‎source/prerequisites.txt‎

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.. _rm-prerequisites:
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=============
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Prerequisites
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=============
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.. contents:: On this page
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:local:
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:backlinks: none
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:depth: 1
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:class: singlecol
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The following pages outline the details and specifics of prepping your
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database for use with Relational Migrator. The instructions for these
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pages reiterate the steps and procedures of the SQL scripts that are
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automatically generated by Relational Migrator when you create your
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first sync job:
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.. list-table::
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:header-rows: 1
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:stub-columns: 1
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:widths: 30 40 40
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* - Database
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- Snapshot Sync Job Support
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- Continuous Sync Job Support
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* - :ref:`MySQL <rm-prereq-mysql>`
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- :icon-lg:`Checkmark`
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- :icon-lg:`Checkmark`
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* - :ref:`Oracle <rm-prereq-oracle>`
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- :icon-lg:`Checkmark`
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- :icon-lg:`Checkmark`
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* - :ref:`PostGreSQL <rm-prereq-postgres>`
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- :icon-lg:`Checkmark`
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- :icon-lg:`Checkmark`
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* - :ref:`SQL Server <rm-prereq-sqlserver>`
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- :icon-lg:`Checkmark`
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- :icon-lg:`Checkmark`
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* - :ref:`Sybase <rm-prereq-sybase>`
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- :icon-lg:`Checkmark`
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-
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.. toctree::
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:titlesonly:
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:hidden:
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/prerequisites/my-sql
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/prerequisites/oracle
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/prerequisites/postgres
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/prerequisites/sql-server
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/prerequisites/sybase

‎source/prerequisites/my-sql.txt‎

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.. _rm-prereq-mysql:
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===========================================
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Configure Migration Prerequisites for MySQL
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===========================================
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.. contents:: On this page
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:local:
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:backlinks: none
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:depth: 1
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:class: singlecol
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To run sync jobs from a MySQL source database, the database may require
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some configuration changes. If Relational Migrator determines the
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database needs configuration changes, it automatically generates a
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SQL script with the required changes. It is recommended to have a
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Database Administrator (DBA) review the commands in this script and
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perform their execution on the database server. The
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MySQL Server configurations depend on the type of sync job:
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.. include:: /includes/fact-short-sync-job-desc.rst
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For details on supported versions of MySQL, see
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:ref:`supported-databases`.
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Steps
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-----
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.. tabs::
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.. tab:: Snapshot Jobs
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:tabid: enable-snapshot-jobs
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.. procedure::
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:style: normal
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.. include:: /includes/fact-my-sql-setup-user-permission-step.rst
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.. tab:: Continuous Jobs
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:tabid: enable-continuous-jobs
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Running continuous jobs on Relational Migrator
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requires the `binary log <https://dev.mysql.com/doc/refman/8.0/en/binary-log.html>`__
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to be enabled on your MySQL instance. The binary log (Binlog)
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records all operations in the order they are committed to the
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database.
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.. procedure::
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:style: normal
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.. include:: /includes/fact-my-sql-setup-user-permission-step.rst
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.. step:: (Optional) Manually verify Binlog is enabled
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Relational Migrator automatically checks this setting for
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you. To manually check the if the ``Binlog`` option is
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enabled, use the queries below for your version of MySQL:
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.. note::
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``Binlog`` is automatically enabled by default
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on MySQL ``8.x`` versions.
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.. tabs::
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.. tab:: MySql 8.x
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:tabid: mysql-8x
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.. code-block:: sql
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:copyable: true
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SELECT variable_value as "BINARY LOGGING STATUS (log-bin) ::"
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FROM performance_schema.global_variables WHERE variable_name='log_bin';
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.. tab:: MySql 5.x
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:tabid: mysql-5x
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.. code-block:: sql
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:copyable: true
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SELECT variable_value as "BINARY LOGGING STATUS (log-bin) ::"
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FROM information_schema.global_variables WHERE variable_name='log_bin';
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.. step:: Locate and update the MySQL configuration file
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a. Run the following SQL query to get the ``server_id``
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value for your MySQL instance:
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.. tabs::
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.. tab:: MySql 8.x
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:tabid: mysql-8x
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.. code-block:: sql
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:copyable: true
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SELECT variable_value
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FROM
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performance_schema.global_variables
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WHERE variable_name='server_id';
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.. tab:: MySql 5.x
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:tabid: mysql-5x
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.. code-block:: sql
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:copyable: true
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SELECT variable_value
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FROM
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information_schema.global_variables
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WHERE variable_name='server_id';
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#. Locate the config file for your MySQL instance by running
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the following ``mysqld`` command in your terminal:
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.. tabs::
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.. tab:: Windows
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:tabid: windows
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.. code-block::
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:copyable: true
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mysql --help | findstr cnf
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.. tab:: MacOS / Linux
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:tabid: macos-linux
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.. code-block::
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:copyable: true
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mysql --help | grep cnf
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#. Under the ``[mysqld]`` section of your MySQL
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configuration file add the following lines. Replace
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the ``XXXXX`` value with the ``server_id`` from the
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previous query:
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.. tabs::
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.. tab:: MySql 8.x
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:tabid: mysql-8x
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.. code-block::
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:copyable: true
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server-id = XXXXX
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log_bin = mysql-bin
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binlog_format = ROW
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binlog_row_image = FULL
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binlog_expire_logs_seconds = 864000
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.. tab:: MySql 5.x
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:tabid: mysql-5x
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.. code-block::
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:copyable: true
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server-id = XXXXX
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log_bin = mysql-bin
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binlog_format = ROW
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binlog_row_image = FULL
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expire_log_days = 10
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.. note::
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If you're running MySQL on AWS RDS and `automated backups
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<https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_WorkingWithAutomatedBackups.html>`__
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are not enabled, ``Binlog`` will be disabled, even if
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the values are set in the configuration file.
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Learn More
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----------
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Relational Migrator relies on the open-source Debezium connector to
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capture row-level changes. For more details, see
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`Debezium MySQL <https://debezium.io/documentation/reference/stable/connectors/mysql.html>`__.

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