I am busy changing the world

This blog post is about how to deploy Redmine 2.6, the opensourced project management software in a Ubuntu server with unicorn, supervisor and nginx. A. Install Redmine: 1. Create a mariadb database for redmine: * database name: redmine * user: redmineuser * password: redminepasswd 2. Clone the redmine's git repo: $ git clone https://github.com/redmine/redmine.git $ cd redmine $ git checkout -b 2.6-stable 3. Configure database connection: Copy config/database.yml.example to config/database.yml and edit this file in order to configure your database settings for "production" environment. production:   adapter: mysql2   database: redmine   host: localhost   username: redmineuser   password: redminepasswd (for ruby 1.9) 4. Install dependencies: $ gem install bundler $ bundle install --without development test 5. Session store secret generation: $ rake generate_secret_token 6. Database schema objects creation: $...

In the previous blog post, I showed you how to run a music streaming service on your computer: http://iambusychangingtheworld.blogspot.com/2014/10/build-your-own-music-streaming-website.html Today, I will guide you how to setup cherrymusic as a service using Supervisord . I love Supervisord! I got some trouble getting cherrymusic to work with Supervisord: * I first tried running cherrymusic with Python2: when clicking to the "browse files" link, it said that cannot browse files and throw this error in the backend: UnicodeDecodeError: 'ascii' codec can't decode byte 0xec in position 1: ordinal not in range(128) * Then, I switched to Python3 and also got errors, but this time, it is a fixable issue:   cherrymusic can list my albums but when I clicked to one of the album, it through this error: ... UnicodeEncodeError: 'utf-8' codec can't encode character '\udcc3' in position 7: surrogates not allowed this is a Python3's bug: h...

Because supervisord needs Upstart to be running but docker only runs one process at a time (When apt-get is running, upstart is not). So, to install supervisord in a docker container, I need to do some little tricks: Prerequisites # echo "deb http://archive.ubuntu.com/ubuntu trusty main universe" >> /etc/apt/sources.list # apt-get update # apt-get upgrade To avoid the error " initctl: Unable to connect to Upstart: Failed to connect to socket /com/ubuntu/upstart: Connection refused " when installing supervisor: # dpkg-divert --local --rename --add /sbin/initctl # ln -s /bin/true /sbin/initctl Install supervisord: # apt-get install supervisor # ln -s /usr/bin/supervisorctl /usr/local/bin/supervisorctl References: [0]  https://github.com/docker/docker/issues/1024 [1]  http://docs.docker.com/articles/using_supervisord/

In the latest stable version of celery (3.1.13), you cannot run a celery beat as a daemon (I used supervisord) using root user without a special environment variable. That special variable is C_FORCE_ROOT. So, in your supervisord configuration file, add this: ... environment=C_FORCE_ROOT="yes" ... This is not encouraged but in some cases like mine, I just need the system works, and avoiding any extra configuration.

Just noted when I stopped the django-celery app which monitored by supervisord with: # supervisorctl stop myappcelery The status show myappcelery had stopped: # supervisorctl status myappcelery                         STOPPED    Nov 20 10:48 AM But, the python processed of django-celery were still running: # ps aux | grep celery root     25729  9.0  1.8 225676 38188 ?        S    11:07   0:00 python /mydjangoapp/manage.py celeryd --pool=eventlet -v 2 -B -s celery -E -l info root     25748  1.0  1.7 164640 36596 ?        S    11:07   0:00 python /mydjangoapp/ manage.py celeryd --pool=eventlet -v 2 -B -s celery -E Then, I take a look at the supervisord configuratio...

Supervisord, a process control system, has a simple built-in web interface to help you manage processes. It is just so great!!! To enable it: 1. Add these line to /etc/supervisor/supervisord.conf to enable supervisord web interface in port 9001 (localhost, domain: my.domain.com): ... [inet_http_server] port=127.0.0.1:9001 username=guest password=mysecret ... +Restart supervisord: $ sudo supervisorctl reload 2. Pass requests of my.domain.com to 127.0.0.1:9001 : + Create a nginx configuration file for supervisord /etc/nginx/sites-available/supervisord : upstream supervisord { server localhost:9001 fail_timeout=0; } server {         listen 80;         server_name my.domain.com;         access_log /var/log/access_supervisor.log;         error_log /var/log/error_supervisor.log;       ...