我已经设置了使用celeryExecutor执行工作流的气流。我已经启动了Web服务器、调度程序和工作程序，它们运行得很好。但是flower UI没有显示任何工人。
airflow worker的输出为：
/usr/local/lib/python2.7/dist-packages/psycopg2/__init__.py:144: UserWarning: The psycopg2 wheel package will be renamed from release 2.8; in order to keep installing from binary please use "pip install psycopg2-binary" instead. For details see: <http://initd.org/psycopg/docs/install.html#binary-install-from-pypi>.
""")
[2018-08-02 11:29:09,827] {__init__.py:57} INFO - Using executor CeleryExecutor
[2018-08-02 11:29:09,983] {driver.py:124} INFO - Generating grammar tables from /usr/lib/python2.7/lib2to3/Grammar.txt
[2018-08-02 11:29:10,052] {driver.py:124} INFO - Generating grammar tables from /usr/lib/python2.7/lib2to3/PatternGrammar.txt
airflow flower的输出为：
/usr/local/lib/python2.7/dist-packages/psycopg2/__init__.py:144: UserWarning: The psycopg2 wheel package will be renamed from release 2.8; in order to keep installing from binary please use "pip install psycopg2-binary" instead. For details see: <http://initd.org/psycopg/docs/install.html#binary-install-from-pypi>.
""")
[2018-08-02 11:29:35,574] {__init__.py:57} INFO - Using executor CeleryExecutor
[2018-08-02 11:29:35,739] {driver.py:124} INFO - Generating grammar tables from /usr/lib/python2.7/lib2to3/Grammar.txt
[2018-08-02 11:29:35,799] {driver.py:124} INFO - Generating grammar tables from /usr/lib/python2.7/lib2to3/PatternGrammar.txt
[I 180802 11:29:36 command:139] Visit me at http://0.0.0.0:5555
[I 180802 11:29:36 command:144] Broker: amqp://guest:**@localhost:5672//
[I 180802 11:29:36 command:147] Registered tasks:
[u'celery.accumulate',
u'celery.backend_cleanup',
u'celery.chain',
u'celery.chord',
u'celery.chord_unlock',
u'celery.chunks',
u'celery.group',
u'celery.map',
u'celery.starmap']
[I 180802 11:29:36 mixins:224] Connected to amqp://guest:**@localhost:5672//
但是flower并没有显示任何关于工作人员或任务的信息，并在CLI上生成以下错误：
[E 180802 11:29:55 broker:82]RabbitMQ管理API调用失败：[Erno 111]连接被拒绝
有什么问题吗？
好吧，我解决了这个问题。事实证明，我应该在运行worker之前将export C_FORCE_ROOT=true添加到我的~/.bashrc文件中。当您以root身份执行worker时，就会发生这种情况。