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Aerospike quiesce script for GCP maintenance events

Based off of Google's own metadata example, this script will drain Aerospike nodes when the node gets a maintenance event.

A maintenance event typically means the VM will be live migrated. This plays havoc with Aerospike. To mitigate the impact, the node will be drained via the asinfo -v quiesce command once a maintenance event is scheduled.

Requirements

python requests 2.20.1
asinfo (from aerospike-tools)

Running

This script should run on every Aerospike node, as maintenance events are local to each VM.

run with nohup:

nohup ./maintenance.py &

Parameters:

usage: maintenance.py [-h] [-o OPTIONS]

optional arguments:
  -h, --help            show this help message and exit
  -o OPTIONS, --options OPTIONS
                        Additional options to pass into asinfo. Can be
                        anything except commands, ie: "-v $COMMAND". Entire
                        string must be quoted, eg: -o="-u admin -p admin"

Example with user/password:

nohup ./maintenance.py -o="-u admin -p admin" &