python - Celery:自动启动工作程序(启动时)

Question

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

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

我可以手动启动一个工作线程来处理这样的任务:

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

现在，我想对其进行守护进程。

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 脚本，会建议你从他们的 Github 源代码中复制它。

sudo vim /etc/init.d/celeryd

复制 https://github.com/celery/celery/blob/master/extra/generic-init.d/celeryd 中的代码到文件中。请参阅daemonizing tutorial了解详情。

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进行相应更改

#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

这将在启动时自动启动 Celery

sudo update-rc.d celeryd defaults