I have a working Airflow environment using Airflow version 1.9 that is running on an Amazon EC2-Instance. I need to upgrade to the latest version of Airflow which is 1.10. I have the option of either upgrading from version 1.9 or installing 1.10 freshly on a new server. Airflow version 1.10 is not listed on Pip so I'm installing it from Git via this command,
pip-3.6 install git+git://github.com/apache/incubator-airflow.git@v1-10-stable
This command successfully installs Airflow version 1.10. You can see that by running the command airflow version
and viewing the output,
____________ _____________
____ |__( )_________ __/__ /________ __
____ /| |_ /__ ___/_ /_ __ /_ __ \_ | /| / /
___ ___ | / _ / _ __/ _ / / /_/ /_ |/ |/ /
_/_/ |_/_/ /_/ /_/ /_/ \____/____/|__/
v1.10.0
When I tried starting up the Airflow scheduler with airflow scheduler
I get the following exception,
ModuleNotFoundError: No module named 'MySQLdb'
[2018-08-14 14:03:16,195] {celery_executor.py:112} ERROR - Error syncing the celery executor, ignoring it:
[2018-08-14 14:03:16,195] {celery_executor.py:113} ERROR - No module named 'MySQLdb'
Traceback (most recent call last):
File "/usr/local/lib/python3.6/site-packages/airflow/executors/celery_executor.py", line 94, in sync
state = task.state
File "/usr/local/lib/python3.6/site-packages/celery/result.py", line 471, in state
return self._get_task_meta()['status']
File "/usr/local/lib/python3.6/site-packages/celery/result.py", line 410, in _get_task_meta
return self._maybe_set_cache(self.backend.get_task_meta(self.id))
File "/usr/local/lib/python3.6/site-packages/celery/backends/base.py", line 365, in get_task_meta
meta = self._get_task_meta_for(task_id)
File "/usr/local/lib/python3.6/site-packages/celery/backends/database/__init__.py", line 53, in _inner
return fun(*args, **kwargs)
File "/usr/local/lib/python3.6/site-packages/celery/backends/database/__init__.py", line 122, in _get_task_meta_for
session = self.ResultSession()
File "/usr/local/lib/python3.6/site-packages/celery/backends/database/__init__.py", line 99, in ResultSession
**self.engine_options)
File "/usr/local/lib/python3.6/site-packages/celery/backends/database/session.py", line 59, in session_factory
engine, session = self.create_session(dburi, **kwargs)
File "/usr/local/lib/python3.6/site-packages/celery/backends/database/session.py", line 45, in create_session
engine = self.get_engine(dburi, **kwargs)
File "/usr/local/lib/python3.6/site-packages/celery/backends/database/session.py", line 42, in get_engine
return create_engine(dburi, poolclass=NullPool)
File "/usr/local/lib64/python3.6/site-packages/sqlalchemy/engine/__init__.py", line 391, in create_engine
return strategy.create(*args, **kwargs)
File "/usr/local/lib64/python3.6/site-packages/sqlalchemy/engine/strategies.py", line 80, in create
dbapi = dialect_cls.dbapi(**dbapi_args)
File "/usr/local/lib64/python3.6/site-packages/sqlalchemy/dialects/mysql/mysqldb.py", line 110, in dbapi
return __import__('MySQLdb')
ModuleNotFoundError: No module named 'MySQLdb'
[2018-08-14 14:03:16,196] {celery_executor.py:112} ERROR - Error syncing the celery executor, ignoring it:
[2018-08-14 14:03:16,196] {celery_executor.py:113} ERROR - No module named 'MySQLdb'
Traceback (most recent call last):
File "/usr/local/lib/python3.6/site-packages/airflow/executors/celery_executor.py", line 94, in sync
state = task.state
File "/usr/local/lib/python3.6/site-packages/celery/result.py", line 471, in state
return self._get_task_meta()['status']
File "/usr/local/lib/python3.6/site-packages/celery/result.py", line 410, in _get_task_meta
return self._maybe_set_cache(self.backend.get_task_meta(self.id))
File "/usr/local/lib/python3.6/site-packages/celery/backends/base.py", line 365, in get_task_meta
meta = self._get_task_meta_for(task_id)
File "/usr/local/lib/python3.6/site-packages/celery/backends/database/__init__.py", line 53, in _inner
return fun(*args, **kwargs)
File "/usr/local/lib/python3.6/site-packages/celery/backends/database/__init__.py", line 122, in _get_task_meta_for
session = self.ResultSession()
File "/usr/local/lib/python3.6/site-packages/celery/backends/database/__init__.py", line 99, in ResultSession
**self.engine_options)
File "/usr/local/lib/python3.6/site-packages/celery/backends/database/session.py", line 59, in session_factory
engine, session = self.create_session(dburi, **kwargs)
File "/usr/local/lib/python3.6/site-packages/celery/backends/database/session.py", line 45, in create_session
engine = self.get_engine(dburi, **kwargs)
File "/usr/local/lib/python3.6/site-packages/celery/backends/database/session.py", line 42, in get_engine
return create_engine(dburi, poolclass=NullPool)
File "/usr/local/lib64/python3.6/site-packages/sqlalchemy/engine/__init__.py", line 391, in create_engine
return strategy.create(*args, **kwargs)
File "/usr/local/lib64/python3.6/site-packages/sqlalchemy/engine/strategies.py", line 80, in create
dbapi = dialect_cls.dbapi(**dbapi_args)
File "/usr/local/lib64/python3.6/site-packages/sqlalchemy/dialects/mysql/mysqldb.py", line 110, in dbapi
return __import__('MySQLdb')
ModuleNotFoundError: No module named 'MySQLdb'
[2018-08-14 14:03:16,197] {celery_executor.py:112} ERROR - Error syncing the celery executor, ignoring it:
[2018-08-14 14:03:16,197] {celery_executor.py:113} ERROR - No module named 'MySQLdb'
Traceback (most recent call last):
File "/usr/local/lib/python3.6/site-packages/airflow/executors/celery_executor.py", line 94, in sync
state = task.state
File "/usr/local/lib/python3.6/site-packages/celery/result.py", line 471, in state
return self._get_task_meta()['status']
File "/usr/local/lib/python3.6/site-packages/celery/result.py", line 410, in _get_task_meta
return self._maybe_set_cache(self.backend.get_task_meta(self.id))
File "/usr/local/lib/python3.6/site-packages/celery/backends/base.py", line 365, in get_task_meta
meta = self._get_task_meta_for(task_id)
File "/usr/local/lib/python3.6/site-packages/celery/backends/database/__init__.py", line 53, in _inner
return fun(*args, **kwargs)
File "/usr/local/lib/python3.6/site-packages/celery/backends/database/__init__.py", line 122, in _get_task_meta_for
session = self.ResultSession()
File "/usr/local/lib/python3.6/site-packages/celery/backends/database/__init__.py", line 99, in ResultSession
**self.engine_options)
File "/usr/local/lib/python3.6/site-packages/celery/backends/database/session.py", line 59, in session_factory
engine, session = self.create_session(dburi, **kwargs)
File "/usr/local/lib/python3.6/site-packages/celery/backends/database/session.py", line 45, in create_session
engine = self.get_engine(dburi, **kwargs)
File "/usr/local/lib/python3.6/site-packages/celery/backends/database/session.py", line 42, in get_engine
return create_engine(dburi, poolclass=NullPool)
File "/usr/local/lib64/python3.6/site-packages/sqlalchemy/engine/__init__.py", line 391, in create_engine
return strategy.create(*args^C[2018-08-14 14:03:16,424] {jobs.py:1585} INFO - Exited execute loop
[2018-08-14 14:03:16,433] {jobs.py:1599} INFO - Terminating child PID: 13615
Here's what my lib folder has,
[/usr/local/lib/python3.6/site-packages]# cd /usr/local/lib64/python3.6/site-packages/sqlalchemy/
root@ip-1-2-3-4
[/usr/local/lib64/python3.6/site-packages/sqlalchemy]# ll
total 320
drwxr-xr-x 3 root root 4096 Aug 13 17:17 connectors
-rwxr-xr-x 1 root root 40456 Aug 13 17:17 cprocessors.cpython-36m-x86_64-linux-gnu.so
-rwxr-xr-x 1 root root 51408 Aug 13 17:17 cresultproxy.cpython-36m-x86_64-linux-gnu.so
-rwxr-xr-x 1 root root 21944 Aug 13 17:17 cutils.cpython-36m-x86_64-linux-gnu.so
drwxr-xr-x 3 root root 4096 Aug 13 17:17 databases
drwxr-xr-x 10 root root 4096 Aug 13 17:17 dialects
drwxr-xr-x 3 root root 4096 Aug 13 17:17 engine
drwxr-xr-x 3 root root 4096 Aug 13 17:17 event
-rwxr-xr-x 1 root root 49746 Mar 6 14:01 events.py
-rwxr-xr-x 1 root root 12030 Mar 6 14:01 exc.py
drwxr-xr-x 4 root root 4096 Aug 13 17:17 ext
-rwxr-xr-x 1 root root 2249 Mar 6 14:01 __init__.py
-rwxr-xr-x 1 root root 3093 Mar 6 14:01 inspection.py
-rwxr-xr-x 1 root root 10967 Mar 6 14:01 interfaces.py
-rwxr-xr-x 1 root root 6712 Mar 6 14:01 log.py
drwxr-xr-x 3 root root 4096 Aug 13 17:17 orm
-rwxr-xr-x 1 root root 49883 Mar 6 14:01 pool.py
-rwxr-xr-x 1 root root 5217 Mar 6 14:01 processors.py
drwxr-xr-x 2 root root 4096 Aug 13 17:17 __pycache__
-rwxr-xr-x 1 root root 1200 Mar 6 14:01 schema.py
drwxr-xr-x 3 root root 4096 Aug 13 17:17 sql
drwxr-xr-x 5 root root 4096 Aug 13 17:17 testing
-rwxr-xr-x 1 root root 1713 Mar 6 14:01 types.py
drwxr-xr-x 3 root root 4096 Aug 13 17:17 util
root@ip-1-2-3-4
[/usr/local/lib64/python3.6/site-packages/sqlalchemy]# pwd
/usr/local/lib64/python3.6/site-packages/sqlalchemy
root@ip-1-2-3-4
[/usr/local/lib64/python3.6/site-packages/sqlalchemy]# cd /usr/local/lib/python3.6/site-packages/sqlalchemy/
bash: cd: /usr/local/lib/python3.6/site-packages/sqlalchemy/: No such file or directory
I'm just confused why Airflow's installation didn't take care of all it's needed dependencies. Am I installing Airflow incorrectly? I really need to be on version 1.10 because version 1.9 has a major bug in it as discovered here and here.
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