Upgrade on Bare Metal

This guide will help you upgrade an OpenMetadata deployment using release binaries.

Prerequisites

Everytime that you plan on upgrading OpenMetadata to a newer version, make sure to go over all these steps:

Version Compatibility Matrix

Before upgrading your OpenMetadata instance, verify that the versions of the external services used in your deployment meet the minimum supported requirements. Upgrading OpenMetadata without compatible versions of these services may cause migration failures or runtime issues.

Note:

If your current deployment uses versions lower than the minimum supported versions listed above, upgrade the respective services before proceeding with the OpenMetadata upgrade process.

Backup your Metadata

Before upgrading your OpenMetadata version we strongly recommend backing up the metadata. The source of truth is stored in the underlying database (MySQL and Postgres supported). During each version upgrade there is a database migration process that needs to run. It will directly attack your database and update the shape of the data to the newest OpenMetadata release. It is important that we backup the data because if we face any unexpected issues during the upgrade process, you will be able to get back to the previous version without any loss.

You can learn more about how the migration process works here.During the upgrade, please note that the backup is only for safety and should not be used to restore data to a higher version.

Since version 1.4.0, OpenMetadata encourages using the builtin-tools for creating logical backups of the metadata:

mysqldump for MySQL
pg_dump for Postgres

For PROD deployment we recommend users to rely on cloud services for their databases, be it AWS RDS, Azure SQL or GCP Cloud SQL. If you’re a user of these services, you can leverage their backup capabilities directly:

You can refer to the following guide to get more details about the backup and restore:

Backup Metadata

Learn how to back up MySQL or Postgres data.

Understanding the “Running” State in OpenMetadata

In OpenMetadata, the “Running” state indicates that the OpenMetadata server has received a response from Airflow confirming that a workflow is in progress. However, if Airflow unexpectedly stops or crashes before it can send a failure status update through the Failure Callback, OpenMetadata remains unaware of the workflow’s actual state. As a result, the workflow may appear to be stuck in “Running” even though it is no longer executing. This situation can also occur during an OpenMetadata upgrade. If an ingestion pipeline was running at the time of the upgrade and the process caused Airflow to shut down, OpenMetadata would not receive any further updates from Airflow. Consequently, the pipeline status remains “Running” indefinitely.

Expected Steps to Resolve

To resolve this issue:

Ensure that Airflow is restarted properly after an unexpected shutdown.
Manually update the pipeline status if necessary.
Check Airflow logs to verify if the DAG execution was interrupted.

Update `sort_buffer_size` (MySQL) or `work_mem` (Postgres)

Before running the migrations, it is important to update these parameters to ensure there are no runtime errors. A safe value would be setting them to 20MB. If using MySQL You can update it via SQL (note that it will reset after the server restarts):

SET GLOBAL sort_buffer_size = 20971520

To make the configuration persistent, you’d need to navigate to your MySQL Server install directory and update the my.ini or my.cnf files with sort_buffer_size = 20971520. If using RDS, you will need to update your instance’s Parameter Group to include the above change. If using Postgres You can update it via SQL (not that it will reset after the server restarts):

SET work_mem = '20MB';

To make the configuration persistent, you’ll need to update the postgresql.conf file with work_mem = 20MB. If using RDS, you will need to update your instance’s Parameter Group to include the above change. Note that this value would depend on the size of your query_entity table. If you still see Out of Sort Memory Errors during the migration after bumping this value, you can increase them further. After the migration is finished, you can revert this changes.

Enable `pg_trgm` Extension (Azure PostgreSQL Flexible Server)

If you are using Azure Database for PostgreSQL (Flexible Server), the migration process requires the pg_trgm extension. By default, Azure restricts this extension and you may encounter:

ERROR: extension "pg_trgm" is not allow-listed for users in Azure Database for PostgreSQL

Resolution Steps:

Allow the extension - Go to Azure Portal → PostgreSQL Flexible Server → Server Parameters → Search for azure.extensions → Add pg_trgm (comma-separated if other extensions exist)
Restart the PostgreSQL server for changes to take effect

Create the extension by running:

CREATE EXTENSION IF NOT EXISTS pg_trgm;

Proceed with the migration

For detailed troubleshooting, see the Kubernetes Upgrade Troubleshooting section.

MySQL Configuration Required for Airflow 3.x Migration

If you are using MySQL as your Airflow metadata database and upgrading to Airflow 3.x (the new default in OpenMetadata 1.11), you must configure MySQL to allow temporary stored function creation during the migration process.

Root Cause

During the Airflow 3.x database migration on MySQL, Airflow needs to create a temporary stored function (uuid_generate_v7) to backfill UUIDs for the task_instance table. When MySQL runs with binary logging enabled (which is the default in most production setups), it blocks function creation unless log_bin_trust_function_creators is enabled or the user has SUPER privileges. Without this configuration, the migration fails with an error like:

FUNCTION airflow_db.uuid_generate_v7 does not exist

This is a known limitation when running Airflow 3.x migrations on MySQL with binary logging enabled. PostgreSQL users are not affected by this issue. For more details, see the Apache Airflow issues:

Resolution

Option 1: Delete and Recreate the Airflow Database (Strongly Recommended) The simplest and most reliable solution is to delete the existing Airflow database and let OpenMetadata recreate it fresh during startup. The Airflow database only stores workflow execution history and metadata—it does not contain any of your OpenMetadata configurations, connections, or ingestion pipeline definitions.

This is the recommended approach because it avoids all migration complexities and ensures a clean state. Your ingestion pipelines and their configurations are stored in the OpenMetadata database, not in Airflow’s database.

# Connect to your MySQL instance and drop the Airflow database
docker exec -i openmetadata_mysql mysql -u USERNAME -pPASSWORD -e "DROP DATABASE IF EXISTS airflow_db;"

Then recreate the database with the proper character set and grant privileges:

CREATE DATABASE airflow_db CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
GRANT ALL PRIVILEGES ON airflow_db.* TO 'airflow_user'@'%' WITH GRANT OPTION;
FLUSH PRIVILEGES;

Execute this via command line:

# Recreate the Airflow database
docker exec -i openmetadata_mysql mysql -u USERNAME -pPASSWORD -e "CREATE DATABASE airflow_db CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci; GRANT ALL PRIVILEGES ON airflow_db.* TO 'airflow_user'@'%' WITH GRANT OPTION; FLUSH PRIVILEGES;"

# Restart the ingestion container to run migrations on the fresh database
docker restart openmetadata_ingestion

Replace USERNAME and PASSWORD with your MySQL root credentials, and airflow_user with your actual Airflow database user if different. For Docker Quickstart deployments, the default root credentials are root / password.

Option 2: Manual Migration Fix (If You Cannot Delete the Database) If you have specific requirements to preserve the Airflow execution history and cannot delete the database, follow the manual steps below. Step 1: Enable MySQL Configuration First, enable log_bin_trust_function_creators in your MySQL instance to allow Airflow to create the necessary stored function: For Docker deployments, add this to your docker-compose.yml file under the MySQL service:

services:
  mysql:
    command: "--log-bin-trust-function-creators=1"

For standalone MySQL instances, execute this query as a user with sufficient privileges:

SET GLOBAL log_bin_trust_function_creators = 1;

Step 2: Clean Airflow Database After enabling the MySQL configuration, choose one of the following options based on your situation: Option 2a: Truncate Task Instance Table If you want to avoid conflicting migration changes, you can truncate the task_instance table. This approach removes all task execution history but preserves your DAGs and connections.

This will delete all historical task execution data. Only use this if you’re okay with losing task run history.

-- Clean task_instance table to avoid migration conflicts
USE airflow_db;

-- Truncate task_instance table
TRUNCATE TABLE task_instance;

-- Verify the table is empty
SELECT COUNT(*) FROM task_instance;

Execute this script:

# Run the cleanup script on your MySQL container
docker exec -i openmetadata_mysql mysql -u USERNAME -pPASSWORD -e "USE airflow_db; TRUNCATE TABLE task_instance; SELECT COUNT(*) as remaining_rows FROM task_instance;"

# Restart the ingestion container to apply migrations
docker restart openmetadata_ingestion

Option 2b: Fix Stuck Migrations (If Migration Already Failed) If your migration is already stuck midway (the task_instance table was partially modified), you need to reset the migration state before restarting. Save the following SQL script as fix_airflow_migration.sql:

-- Fix Airflow 3.x migration issue
-- This script fixes the partial migration of task_instance table

USE airflow_db;

-- Check if the migration was partially applied
-- If 'id' column exists but isn't properly configured, we need to fix it

-- First, check the current state
SHOW COLUMNS FROM task_instance LIKE 'id';

-- Drop the problematic column if it exists
SET @exist := (SELECT COUNT(*) FROM information_schema.COLUMNS
    WHERE TABLE_SCHEMA = 'airflow_db'
    AND TABLE_NAME = 'task_instance'
    AND COLUMN_NAME = 'id');

SET @sqlstmt := IF(@exist > 0,
    'ALTER TABLE task_instance DROP COLUMN id',
    'SELECT ''Column does not exist'' AS status');

PREPARE stmt FROM @sqlstmt;
EXECUTE stmt;
DEALLOCATE PREPARE stmt;

-- Reset the alembic version to before this migration
-- The migration that's failing is: d59cbbef95eb (Add UUID primary key to task_instance)
-- We need to set it back to the previous version: 05234396c6fc
UPDATE alembic_version SET version_num = '05234396c6fc' WHERE version_num = 'd59cbbef95eb';

-- Verify the changes
SELECT * FROM alembic_version;
SHOW COLUMNS FROM task_instance LIKE 'id';

Then execute the script and restart the container:

# Run the fix script on your MySQL container
docker exec -i openmetadata_mysql mysql -u USERNAME -pPASSWORD < fix_airflow_migration.sql

# Restart the ingestion container
docker restart openmetadata_ingestion

Replace USERNAME and PASSWORD with your actual MySQL credentials, and ensure the database name matches your configuration (default is airflow_db).

Requirements

This guide assumes that you have an OpenMetadata deployment that you installed and configured following the Bare Metal deployment guide.

Ready to upgrade? Continue to the Upgrade Steps for the step-by-step upgrade process and post-upgrade tasks.

Deployment

Upgrade on Bare Metal | Official Documentation

Upgrade on Bare Metal

Prerequisites

Version Compatibility Matrix

Note:

Backup your Metadata

Backup Metadata

Understanding the “Running” State in OpenMetadata

Expected Steps to Resolve

Update `sort_buffer_size` (MySQL) or `work_mem` (Postgres)

Enable `pg_trgm` Extension (Azure PostgreSQL Flexible Server)

MySQL Configuration Required for Airflow 3.x Migration

Root Cause

Resolution

Requirements

​Upgrade on Bare Metal

​Prerequisites

​Version Compatibility Matrix

​Note:

​Backup your Metadata

Backup Metadata

​Understanding the “Running” State in OpenMetadata

​Expected Steps to Resolve

​Update sort_buffer_size (MySQL) or work_mem (Postgres)

​Enable pg_trgm Extension (Azure PostgreSQL Flexible Server)

​MySQL Configuration Required for Airflow 3.x Migration

​Root Cause

​Resolution

​Requirements

Upgrade on Bare Metal

Prerequisites

Version Compatibility Matrix

Note:

Backup your Metadata

Understanding the “Running” State in OpenMetadata

Expected Steps to Resolve

Update `sort_buffer_size` (MySQL) or `work_mem` (Postgres)

Enable `pg_trgm` Extension (Azure PostgreSQL Flexible Server)

MySQL Configuration Required for Airflow 3.x Migration

Root Cause

Resolution

Requirements