Recurring Edge Services maintenance tasks

To ensure optimal day-to-day operation of the Apigee system, certain tasks should be performed when the system is originally installed and/or on a periodic basis.

The following tools are used to communicate with, or maintain various components of, the Apigee system.

Tool	Used For	System Location
`nodetool`	Apache Cassandra maintenance	`/opt/apigee/apigee-cassandra/bin`
`cassandra‑cli`	Apache Cassandra command line	`/opt/apigee/apigee-cassandra/bin`
`zkCli.sh`	Apache ZooKeeper command line utility	`/opt/apigee/apigee-zookeeper/bin`
`nc`	Arbitrary TCP/IP and UDP commands; invocation of ZooKeeper "four-letter commands"	`/usr/bin/nc` or another location dependent on your operating system

In situations where the nc or telnet commands might be considered a security risk, the following Python script can be used:

import time
import socket
import sys

if len(sys.argv) <> 4:
    print "Usage: %s address port 4-letter-cmd" % sys.argv[0]
else:
    c = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    c.connect((sys.argv[1], int(sys.argv[2])))
    c.send(sys.argv[3])
    time.sleep(0.1)
    print c.recv(512)