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Uninstall Airflow

Uninstall Airflow

Conda Uninstall Airflow

Uninstall Airflow Pro

Airflow-optimized fans are quieter and great for unrestricted areas, like the front of your case. Static pressure fans are designed to pull or push air with extra force, which is ideal for areas with more restricted airflow—like a water cooling radiator or a large CPU cooler with lots of fins. We remove the Task logs by implementing our own FileTaskHandler, and then pointing to it in the airflow.cfg. So, we overwrite the default LogHandler to keep only N task logs, without scheduling additional DAGs. We are using Airflow1.10.1. core loggingconfigclass = logconfig.LOGGINGCONFIG logconfig.LOGGINGCONFIG.

In a previous post we explained how to Install and Configure Apache Airflow (a platform to programmatically author, schedule and monitor workflows). The technology is actively being worked on and more and more features and bug fixes are being added to the project in the form of new releases. At some point, you will want to upgrade to take advantage of these new feature.

In this post we’ll go over the process that you should for upgrading apache airflow versions.

Note: You will need to separately make sure that your dags will be able to work on the new version of Airflow.

Uninstall Airflow

Upgrade Airflow

Note: These steps can also work to downgrade versions of Airflow

Note: Execute all of this on all the instances in your Airflow Cluster (if you have more then one machine)

Gather information about your current environment and your target setup:

Get the Airflow Home directory. Placeholder for this value: {AIRFLOW_HOME}

Get the current version of Airflow you are running. Placeholder for this value: {OLD_AIRFLOW_VERSION}

To get this value you can run:

Get the new version of Airflow you want to run. Placeholder for this value: {NEW_AIRFLOW_VERSION}

Are you using sqlite? Placeholder for this value:{USING_SQLITE?}

If you’re not using SQLite, search the airflow.cfg file for the metastore (celery_result_backend and sql_alchemy_conn configurations) type {AIRFLOW_DB_TYPE}, host name {AIRFLOW_DB_HOST}, database schema name {AIRFLOW_DB_SCHEMA}, username {AIRFLOW_DB_USERNAME}, and password {AIRFLOW_DB_PASSWORD}

Ensure the new version of Airflow you want to Install is Available

Run the follow command (don’t forget to include the ‘’):

Note: This will throw an error saying that the version is not provided and then show you all the versions available. This is supposed to happen and is a way that you can find out what version are available.

View the list of versions available and make sure the version you want to install ‘{NEW_AIRFLOW_VERSION}’ is available

Shutdown all the Airflow Services on the Master and Worker nodes

webserver

gunicorn processes

scheduler

worker – if applicable

celeryd daemons

flower – if applicable

kerberos ticket renewer – if applicable

Take backups of various components to ensure you can Rollback

Optionally, you can create a directory to house all of these backups. The bellow steps assume you’re going to create this type of folder and push all your objects to the {AIRFLOW_BACKUP_FOLDER}. But you can just as easily rename the files you want to backup if that’s more convenient.

Create the backup folder:

Backup your Configurations

Move the airflow.cfg file to the backup folder:

Backup your DAGs

Zip up the Airflow DAGs folder and move it to the backup folder:

Note: You may need to install the zip package

Backup your DB/Metastore

If you’re using sqlite ({USING_SQLITE?}):

Move the airflow.db sqlite db to the backup folder:

If you’re using a SQL database like MySQL or PostgreSQL, take a dump of the database.

If you’re MySQL you can use the following command:

Upgrade Airflow

Run the following PIP command to install Airflow and the required dependencies:

Note: If you installed additional sub-packages of Airflow you will need to upgrade those too

Regenerate and Update Airflow Configurations

Regenerate the airflow.cfg that was backed up using the following command:

Note: The reason you want to regenerate the airflow.cfg file is because between version of airflow, new configurations might have been added or old configurations values (for things that you don’t need to update from the default values) might have changed.

Remove the generated airflow.db file

If you’re using sqlite, copy the old airflow.db file you backed up back to the original place

Manually copy all of the individual updated configurations from the old airflow.cfg file that you backed up to the new airflow.cfg file

Compare the airflow.cfg files (backed up and new one) to determine which configurations you need to copy over. This may include the following configurations:

executor

sql_alchemy_conn

base_url

load_examples

broker_url

celery_result_backend

Review the airflow.cfg file further to ensure all values are set to the correct value

Upgrade Metastore DB

Run the following command:

Restart your Airflow Services

The same ones you shutdown in step #3

Test the upgraded Airflow Instance

High Level Checklist:

Services start up with out errors?

DAGs run as expected?

Do the plugins you have installed (if any) load and work as expected?

Once/If you want, you can delete the {AIRFLOW_BACKUP_FOLDER} folder and its contents

Conda Uninstall Airflow

Rollback Airflow

In the event you encountered a problem during the upgrade process and would like to rollback to the version you already had before, follow these instructions:

Uninstall Airflow Pro

Take note of what step you stopped at in the upgrade process

Stop all the Airflow Services

If you reached step #7 in the upgrade steps above (Step: Upgrade Metastore DB)

Restore the database to the original state

If you’re using sqlite ({USING_SQLITE?})

Delete the airflow.db file that’s there and copy the old airflow.db file from your backup folder to its original place:

If you’re using a SQL database like MySQL or PostgreSQL, restore the dump of the database

If you’re using MySQL you can use the following command:

If you reached step #6 in the upgrade steps above (Step: Regenerate and Update Airflow Configurations)

Copy the airflow.cfg file that you backed up back to its original place:

If you reached step #5 in the upgrade steps above (Step: Upgrade Airflow)

Downgrade Airflow back to the original version:

Note: If you installed additional sub-packages of Airflow you will need to downgrade those too

If you reached step #4 in the upgrade steps above (Step: Take backups)

Restore the airflow.cfg file (if you haven’t already done so)

If you’re using sqlite ({USING_SQLITE?}), restore the airflow.db file (if you haven’t already done so)

Restart all the Airflow Services

Test the restored Airflow Instance

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