Course Removal Script

[sahiilll]

Current State of Course Removal Script: RemoveCourse.py in "/home/vital/vital2.0/source/virtual_lab/vital_site/vital/management/commands" folder manages the tasks. Following are some functions handled by the script ( basically only handles data cleaning; that too partially )

1. Takes Course ID
2. Created Course object variable and inherently assigns all the values related to vital_course table in databse
3. delete() function is called on Registered_Courses object, user_nets ( list of net object) net here refers to any entry related to course in network configuration in table, Virtual_machine object

delete() : Performs an SQL delete query on all rows in the QuerySet and returns the number of objects deleted and a dictionary with the number of deletions per object type.

Requirements:

1. Remove entries from database ( partially being handled by the current script)
2. Remove vlans and interfaces
3. Remove dhcp files
4. Remove iptable rules
5. Remove qcow and conf files from vlab-datastore

[sahiilll]

The following code handles the deletion of all the entries in the database tables.

[sahiilll]

The following code handles teh deletion of the files from teh vlab-datastore:

It searches for the filenames which contains course_id in the middle position and if found, removes it from the gluster. It takes care of any files created for a vital user for that course and deletes it before removing the course.

The second part deletes the course files from clean folder in the same way.

[sahiilll]

The following code handles the network configuartio files and vlan interfaces and removes it:

[sahiilll]

The following takes care of iptables:

[sahiilll]

Added print Statements