django-orchestra/docs/README.md

Quick start

0. Install django-orchestra following any of these methods:

   1. PIP-only, Fast deployment setup (demo)
   2. Docker container (development)
   3. Install on current system (production)

1. Copy orchestra SSH key to the servers to be managed, you can use ssh-copy-id:

   orchestra@panel:~ ssh-copy-id root@server.address
   

   Then add the servers to orchestra using the web interface /admin/orchestration/servers, check that the SSH connection is working and Orchestra can report the uptime of the servers.

2. Now configure service by service (domains, databases, webapps, websites, ...):

   1. Add the route via /admin/orchestration/route/
   2. Configure related settings on /admin/settings/setting/
   3. If required, configure related resources like Account disc limit, VPS traffic, etc /resources/resource/
   4. Test that everything works as expected by creating and deleting service instances
   5. Do the same for the other services

3. Configure billing by adding services /admin/services/service/add/ and plans /admin/plans/plan/. Once a service is created hit the Update orders button to create the orders for the existing service instances.

Architecture

Orchestration
Orders
Resources

Creating new services

1. Think about if the service can fit into one of the existing service models like: SaaS or WebApps, refere to the related documentation if that is the case.

2. Create a new django app using startapp management command. For ilustrational purposes we will create a crontab services that will allow orchestra to manage user-based crontabs.

   python3 manage.py startapp crontabs
   

3. Add the new crontabs app to the INSTALLED_APPS in your project's settings.py

4. Create a models.py file with the data your service needs to keep in order to be managed by orchestra

   from django.db import models
   
   class CrontabSchedule(models.Model):
       account = models.ForeignKey('accounts.Account', verbose_name=_("account"))
       minute = models.CharField(_("minute"), max_length=64, default='*')
       hour = models.CharField(_("hour"), max_length=64, default='*')
       day_of_week = models.CharField(_("day of week"), max_length=64, default='*')
       day_of_month = models.CharField(_("day of month"), max_length=64, default='*')
       month_of_year = models.CharField(_("month of year"), max_length=64, default='*')
   
       class Meta:
           ordering = ('month_of_year', 'day_of_month', 'day_of_week', 'hour', 'minute')
   
       def __str__(self):
           rfield = lambda f: f and str(f).replace(' ', '') or '*'
           return "{0} {1} {2} {3} {4} (m/h/d/dM/MY)".format(
               rfield(self.minute), rfield(self.hour), rfield(self.day_of_week),
               rfield(self.day_of_month), rfield(self.month_of_year),
           )
   
   class Crontab(models.Model):
       account = models.ForeignKey('accounts.Account', verbose_name=_("account"))
       schedule = models.ForeignKey(CrontabSchedule, verbose_name=_("schedule"))
       description = models.CharField(_("description"), max_length=256, blank=True)
       command = models.TextField(_("content"))
   
       def __str__(self):
           return (self.description or self.command)[:32]
   

5. Create a admin.py to enable the admin interface, refere to Django Admin documentation for further customization.

   from django.contrib import admin
   from .models import CrontabSchedule, Crontab
   
   class CrontabScheduleAdmin(admin.ModelAdmin):
       pass
   
   class CrontabAdmin(admin.ModelAdmin):
       pass
   
   admin.site.register(CrontabSchedule, CrontabScheduleAdmin)
   admin.site.register(Crontab, CrontabAdmin)
   

6. Create a api.py to enable the REST API.

7. Create a backends.py fiel with the needed backends for service orchestration and monitoring.

   import os
   import textwrap
   from django.utils.translation import ugettext_lazy as _
   from orchestra.contrib.orchestration import ServiceController, replace
   from orchestra.contrib.resources import ServiceMonitor
   
   class UNIXCronBackend(ServiceController):
       """
       Basic UNIX cron support.
       """
       verbose_name = _("UNIX cron")
       model = 'crons.CronTab'
   
       def prepare(self):
           super(UNIXCronBackend, self).prepare()
           self.accounts = set()
   
       def save(self, crontab):
           self.accounts.add(crontab.account)
   
       def delete(self, crontab):
           self.accounts.add(crontab.account)
   
       def commit(self):
           for account in self.accounts:
               crontab = None
               self.append("echo '' > %(crontab_path)s" % context)
               for crontab in account.crontabs.all():
                   self.append("
   

8. Configure the routing