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Install Cabot on CentOS7 using uwsgi, nginx, and mysql
The Cabot quick start instructions are for auto installing on ubuntu using fabric, gunicorn, postgres.
I wanted to install manually on CentOS 7 running with uwsgi, nginx, mysql, and use our own mail server for
alerts instead of Amazon SES
These are my notes on how I did that.
These notes aren't a complete walkthrough, and a few steps may be missing or wrong, but I thought they might
be helpful anyways.
Setup
1. adduser www
passwd www
mkdir /var/www/
mkdir /var/www/logs/
mkdir /var/www/run/
mkdir /var/www/run/celery/
chown -R www.www /var/www/
2. download(or clone) Cabot from github: https://github.com/arachnys/cabot/archive/master.zip
3. unziped to /var/www/cabot/
4. python setup.py install
I'm not sure if this was necessary
5. yum install pip gcc python-devel openssl-devel
6. pip install setuptools --upgrade
7. copied list of required packages from setup.py to requirements.txt
replaced psycopg2 with MySQL-python
8. pip install -r requirements.txt
9. If you want to use your own smtp server instead of amazon:
nano cabot/settings.py
EMAIL_BACKEND = 'django.core.mail.backends.smtp.EmailBackend'
EMAIL_HOST = "mail.example.com"
10. cp conf/production.env.example cp conf/production.env
11. nano conf/production.env
DATABASE_URL=mysql://cabot:PASSWORD@db.lan2/Cabot
ADMIN_EMAIL=admin@example.com
GRAPHITE_API=http://graphite.lan2/
GRAPHITE_USER=cabot
GRAPHITE_PASS=PASSWORD
WWW_HTTP_HOST=monitor.lan2
12. Install node:
yum install gcc-c++
wget http://nodejs.org/dist/v0.10.33/node-v0.10.33.tar.gz
./configure
make
make install
npm install -g coffee-script less@1.3 --registry http://registry.npmjs.org/
13. sh -ac ' . ./conf/production.env; python manage.py syncdb'
14. sh -ac ' . ./conf/production.env; python manage.py migrate'
15. sh -ac ' . ./conf/production.env; python manage.py collectstatic --noinput'
16. sh -ac ' . ./conf/production.env; python manage.py compress'
17. Setup uwsgi
pip install uwsgi
nano /etc/systemd/system/uwsgi.service
[Unit]
Description=uWSGI Emperor
After=syslog.target
[Service]
ExecStart=/bin/uwsgi --ini /etc/uwsgi/emperor.ini
Restart=always
KillSignal=SIGQUIT
Type=notify
StandardError=syslog
NotifyAccess=main
[Install]
WantedBy=multi-user.target
nano /etc/uwsgi/vassals/cabot.ini
[uwsgi]
chdir=/var/www/cabot
module=cabot.wsgi
master=True
vacuum=True
max-requests=50000
socket=localhost:5000
processes=10
logto=/var/www/logs/cabot_uwsgi.log
for-readline = /var/www/cabot/conf/production.env
env = %(_)
endfor =
systemctl start uwsgi
systemctl enable uwsgi
18. Setup Nginx
Install official Nginx rpm from repo: http://wiki.nginx.org/Install
nano /etc/nginx/conf.d/cabot.conf
upstream django {
server 127.0.0.1:5000;
}
server {
listen 10.1.0.74:80;
server_name monitor.lan2;
access_log /var/www/logs/cabot.access.log;
error_log /var/www/logs/cabot.error.log;
location / {
uwsgi_pass django;
include uwsgi_params;
}
location /static/ {
alias /var/www/cabot/static/;
}
}
systemctl start nginx
systemctl enable nginx
19. Setup systemd file to run celery workers
nano /etc/systemd/system/cabot-worker.service
# Copied and modified from https://github.com/celery/celery/blob/3.1/extra/systemd/celery.service
[Unit]
Description=CabotCelery workers
After=network.target
[Service]
Type=forking
User=www
Group=www
WorkingDirectory=/var/www/cabot/
EnvironmentFile=/var/www/cabot/conf/production.env
ExecStart=/bin/celery multi start worker \
-A cabot --pidfile=/var/www/run/celery/%n.pid \
--logfile=/var/www/logs/celery_%n.log --loglevel="INFO" \
-B
ExecStop=/bin/celery multi stopwait worker \
--pidfile=/var/run/celery/%n.pid
ExecReload=/bin/celery multi restart worker \
-A cabot --pidfile=/var/www/run/celery/%n.pid \
--logfile=/var/www/logs/celery_%n.log --loglevel="INFO"
[Install]
WantedBy=multi-user.target
systemctl start cabot-worker
systemctl enable cabot-worker
20. Install redis
Install epel: rpm -Uvh http://mirror.symnds.com/distributions/fedora-epel/7/x86_64/e/epel-release-7-2.noarch.rpm
yum install redis
systemctl start redis
systemctl enable redis
21. goto http://monitor.lan2 and see if everything is successfully running
Run cabot without uwsgi and nginx for testing:
sh -ac ' . ./conf/production.env; python manage.py runserver'
To run uwsgi server for testing:
sh -ac ' . ./conf/production.env; uwsgi --socket localhost:5000 --module cabot.wsgi --chmod-socket=664'
Manually run celery workers:
sh -ac '. ./conf/production.env; celery worker -B -A cabot --loglevel=INFO --concurrency=16 -Ofair'
@druchoo

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commented Feb 12, 2015

Thanks bud. Although incomplete, this helped me get cabot somewhat running on RHEL 6.x

@unquietwiki

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commented Dec 14, 2015

  • Do most of your yum installs in step 5; a few more are needed too. yum install pip gcc python-devel openssl-devel gcc-c++ openldap-devel should work.
  • If you're still using PostgreSQL for this, use https://wiki.postgresql.org/wiki/YUM_Installation to locate the correct RPM repo package & install instructions. You'll need the following packages: postgresql94 postgresql94-libs postgresql94-server postgresql94.x86_64 postgresql94-contrib postgresql94-devel . Use the command PATH=$PATH:/usr/pgsql-9.4/bin/ to ensure the pip component for it installs correctly.
  • Omit steps 7 & 8; do step 4 there. May need to edit the setup.py to change some packages to use ~= instead of == if dependency failures occur (Django itself needs to stay below 1.7 I think).
  • Step 12, use http://nodejs.org/dist/v0.10.41/node-v0.10.41.tar.gz , or check https://nodejs.org/en/blog/ for the latest version.
  • Step 20, the latest EPEL info is at https://fedoraproject.org/wiki/EPEL
@mukundparmar

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commented Dec 28, 2016

I am good up to step 12 when I run step 13 I am getting

[root@ cabot]# sh -ac ' . ./conf/production.env; python manage.py syncdb'
Traceback (most recent call last):
File "manage.py", line 10, in
execute_from_command_line(sys.argv)
File "/usr/lib/python2.7/site-packages/django/core/management/init.py", line 350, in execute_from_command_line
utility.execute()
File "/usr/lib/python2.7/site-packages/django/core/management/init.py", line 324, in execute
django.setup()
File "/usr/lib/python2.7/site-packages/django/init.py", line 18, in setup
apps.populate(settings.INSTALLED_APPS)
File "/usr/lib/python2.7/site-packages/django/apps/registry.py", line 85, in populate
app_config = AppConfig.create(entry)
File "/usr/lib/python2.7/site-packages/django/apps/config.py", line 90, in create
module = import_module(entry)
File "/usr/lib64/python2.7/importlib/init.py", line 37, in import_module
import(name)
File "/usr/lib/python2.7/site-packages/polymorphic/init.py", line 11, in
from .polymorphic_model import PolymorphicModel
File "/usr/lib/python2.7/site-packages/polymorphic/polymorphic_model.py", line 19, in
from django.contrib.contenttypes.models import ContentType
File "/usr/lib/python2.7/site-packages/django/contrib/contenttypes/models.py", line 159, in
class ContentType(models.Model):
File "/usr/lib/python2.7/site-packages/django/db/models/base.py", line 94, in new
app_config = apps.get_containing_app_config(module)
File "/usr/lib/python2.7/site-packages/django/apps/registry.py", line 239, in get_containing_app_config
self.check_apps_ready()
File "/usr/lib/python2.7/site-packages/django/apps/registry.py", line 124, in check_apps_ready
raise AppRegistryNotReady("Apps aren't loaded yet.")
django.core.exceptions.AppRegistryNotReady: Apps aren't loaded yet.

Here is my manage.py
#!/usr/bin/env python
import os
import sys

if name == "main":
os.environ.setdefault("DJANGO_SETTINGS_MODULE", "cabot.settings")

from django.core.management import execute_from_command_line

execute_from_command_line(sys.argv)
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