Celery:自动启动Worker(启动时)

Question

我在/var/tasks/tasks.py中定义了任务（用于Celery）。

我在/var/tasks/venv有一个virtualenv，它应该用于运行/var/tasks/tasks.py。

我可以手动启动一个工人来处理这样的任务：

cd /var/tasks
. venv/bin/activate
celery worker -A tasks -Q queue_1

现在，我想守护它。

我从GitHub复制了init.d脚本，并在/etc/default/celeryd:中使用以下配置文件

# name(s) of nodes to start
CELERYD_NODES="worker1"
# absolute or relative path to celery binary
CELERY_BIN="/var/tasks/venv/bin/celery"
# app instance
CELERY_APP="tasks"
# change to directory on upstart
CELERYD_CHDIR="/var/tasks"
# options
CELERYD_OPTS="-Q queue_1 --concurrency=8"
# %N will be replaced with the first part of the nodename.
CELERYD_LOG_FILE="/var/log/celery/%N.log"
CELERYD_PID_FILE="/var/run/celery/%N.pid"
# unprivileged user/group
CELERYD_USER="celery"
CELERYD_GROUP="celery"
# create pid and log directories, if missing
CELERY_CREATE_DIRS=1

当我启动服务（通过init.d脚本）时，它会显示：

celery init v10.1.
Using config script: /etc/default/celeryd

但是，它不处理队列中的任何任务，日志文件中也没有任何内容。

我做错了什么？

Answer 1

Supervisor可能是一个不错的选择，但如果你想使用Celery Init.d，Script会建议你从他们的Github Source复制它。

sudo vim /etc/init.d/celeryd

从复制代码https://github.com/celery/celery/blob/master/extra/generic-init.d/celeryd中的。有关详细信息，请参阅守护进程教程。

sudo chmod 755 /etc/init.d/celeryd
sudo chown root:root /etc/init.d/celeryd
sudo nano /etc/default/celeryd

复制粘贴以下配置并相应更改

#Where your Celery is present
CELERY_BIN="/home/shivam/Desktop/deploy/bin/celery"
# App instance to use 
CELERY_APP="app.celery"
# Where to chdir at start
CELERYD_CHDIR="/home/shivam/Desktop/Project/demo/"
# Extra command-line arguments to the worker 
CELERYD_OPTS="--time-limit=300 --concurrency=8"
# %n will be replaced with the first part of the nodename. 
CELERYD_LOG_FILE="/var/log/celery/%n%I.log" 
CELERYD_PID_FILE="/var/run/celery/%n.pid"

# Workers should run as an unprivileged user.
# You need to create this user manually (or you can choose
# A user/group combination that already exists (e.g., nobody). 
CELERYD_USER="shivam" 
CELERYD_GROUP="shivam"
# If enabled pid and log directories will be created if missing,
# and owned by the userid/group configured. 
CELERY_CREATE_DIRS=1
export SECRET_KEY="foobar"

保存并退出

sudo /etc/init.d/celeryd start
sudo /etc/init.d/celeryd status

这将在引导上自动启动Celery

sudo update-rc.d celeryd defaults

Answer 2

如果您使用systemd，您应该启用芹菜服务。它将在启动时激活您的芹菜守护程序。

sudo systemctl enable yourcelery.service

Answer 3

我最终使用了Supervisor和/etc/Supervisor/conf.d/selery.conf中的脚本，类似于以下内容：

https://github.com/celery/celery/blob/3.1/extra/supervisord/celeryd.conf

这可以很好地自动处理妖魔化。