Block Managers

In the BHR system blocks are handled by an external component called a blocker.

bhr_client.block_manager.BlockManager Takes a bhr_client.rest.Client and a Blocker object, and blocks/unblocks things as needed.

To implement a blocker, simply write a class that implements block_many and unblock_many methods.

This is the simplest example, it just prints out what should be blocked and unblocked to stdout. A real blocker would add firewall rules, ACL entries, etc.

import time
class DummyStdoutBlocker:
    def __init__(self):
        pass

    def block_many(self, records):
        for r in records:
            print time.ctime(), "block", r['cidr']

    def unblock_many(self, records):
        for r in records:
            print time.ctime(), "unblock", r['block']['cidr']

To use the blocker, you would write a main function like:

from bhr_client.rest import login_from_env
def main():
    client = login_from_env()
    blocker = DummyStdoutBlocker()
    m = BlockManager(client, blocker)
    m.run()

class bhr_client.block_manager.BlockManager(client, blocker)

run()

Run the blocker, blocking and unblocking as needed