使用 systemd 的 celery 守护进程未运行

Question

我正在使用 ubuntu 16 和 systemd 将 celery 作为守护进程运行。我也创建了单元文件，但我无法将 celery 作为服务运行。为什么会出现这个错误？

/etc/systemd/system/celery.service

[Unit]
Description=Celery Service
After=network.target

[Service]
Type=forking
User=celery
Group=celery
EnvironmentFile=-/etc/default/celery
WorkingDirectory=/srv/weaver/src
ExecStart=/bin/sh -c '${CELERY_BIN} multi start ${CELERYD_NODES} \
  -A ${CELERY_APP} --pidfile=${CELERYD_PID_FILE} \
  --logfile=${CELERYD_LOG_FILE} --loglevel=${CELERYD_LOG_LEVEL} ${CELERYD_OPTS}'
ExecStop=/bin/sh -c '${CELERY_BIN} multi stopwait ${CELERYD_NODES} \
  --pidfile=${CELERYD_PID_FILE}'
ExecReload=/bin/sh -c '${CELERY_BIN} multi restart ${CELERYD_NODES} \
  -A ${CELERY_APP} --pidfile=${CELERYD_PID_FILE} \
  --logfile=${CELERYD_LOG_FILE} --loglevel=${CELERYD_LOG_LEVEL} ${CELERYD_OPTS}'

[Install]
WantedBy=multi-user.target

文件位于 /etc/default/celery

ENABLED="true"
CELERYD_NODES="worker1"
#CELERYD_NODES="worker1 worker2 worker3"
CELERY_BIN="/usr/local/bin/celery"
CELERY_APP="main:celery_app"
CELERYD_CHDIR="/srv/weaver/src"
CELERYD_OPTS=" --queue=weaver  --time-limit=100000 --concurrency=2"
CELERYD_LOG_FILE="/var/log/celery/%N.log"
CELERYD_PID_FILE="/var/run/celery2/%N.pid"
CELERYD_USER="celery"
CELERYD_GROUP="celery"
CELERY_CREATE_DIRS=1
# Change Celery Beat
CELERYBEAT_CHDIR="/srv/weaver/src"
# Log files
CELERYBEAT_LOG_FILE="/var/log/celery/celerybeat.log"
# Celery Beat Log files
CELERYBEAT_PID_FILE="/var/run/celery/celerybeat.pid"
# Scheduler for celery
CELERYBEAT_OPTS=" --pidfile=/var/run/celery/celerybeat.pid  --sch

运行服务的输出

● celery.service - Celery Service
   Loaded: loaded (/etc/systemd/system/celery.service; disabled; vendor preset: enabled)
   Active: failed (Result: exit-code) since Thu 2017-01-12 17:12:32 IST; 2min 17s ago
  Process: 18561 ExecStop=/bin/sh -c ${CELERY_BIN} multi stopwait ${CELERYD_NODES}    --pidfile=${CELERYD_PID_FILE} (code=exited, status=0/SUCCESS)
  Process: 18540 ExecStart=/bin/sh -c ${CELERY_BIN} multi start ${CELERYD_NODES}    -A ${CELERY_APP} --pidfile=${CELERYD_PID_FILE}    --logfile=${CELERYD_LOG_FIL
 Main PID: 18555 (code=exited, status=1/FAILURE)

Jan 12 17:12:30 fb01 systemd[1]: Starting Celery Service...
Jan 12 17:12:31 fb01 sh[18540]: celery multi v3.1.23 (Cipater)
Jan 12 17:12:31 fb01 sh[18540]: > Starting nodes...
Jan 12 17:12:31 fb01 sh[18540]:         > worker1@fb01: OK
Jan 12 17:12:31 fb01 systemd[1]: Started Celery Service.
Jan 12 17:12:32 fb01 systemd[1]: celery.service: Main process exited, code=exited, status=1/FAILURE
Jan 12 17:12:32 fb01 sh[18561]: celery multi v3.1.23 (Cipater)
Jan 12 17:12:32 fb01 sh[18561]: > worker1@fb01: DOWN
Jan 12 17:12:32 fb01 systemd[1]: celery.service: Unit entered failed state.
Jan 12 17:12:32 fb01 systemd[1]: celery.service: Failed with result 'exit-code'.

Answer 1

我刚刚遇到了这个问题。我的问题是配置问题。特别是，我没有设置 CELERYD_LOG_LEVEL 在我的环境文件中。 （在您的情况下为 /etc/default/celeryd ）。看来你也犯了同样的错误。

（我还有一些其他配置问题需要解决。我通过在命令行上运行 celery 发现了这些问题。）

Answer 2

我也有同样的症状，结果是权限问题。

就我而言，类似：

chmod o+x /srv/weaver/src

整理好了。

注意：这不是启用所需权限的最佳方法，但这与此答案无关。