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multi_dc_gslb_f5_java_stack.py
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#!/usr/bin/env python3
# coding=utf-8
# vim:ts=4:sts=4:sw=4:et
#
# Author: Hari Sekhon
# Date: 2023-04-21 00:32:11 +0100 (Fri, 21 Apr 2023)
#
# https://github.com/HariSekhon/Diagrams-as-Code
#
# License: see accompanying Hari Sekhon LICENSE file
#
# If you're using my code you're welcome to connect with me on LinkedIn
# and optionally send me feedback to help steer this or other code I publish
#
# https://www.linkedin.com/in/HariSekhon
#
"""
Multi-Datacenter GSLB F5 Java Stack
"""
__author__ = 'Hari Sekhon'
__version__ = '0.1'
import os
from urllib.request import urlretrieve
from diagrams import Diagram, Cluster # , Edge
# ============================================================================ #
# On-premise / Open Source resources:
#
# https://diagrams.mingrammer.com/docs/nodes/onprem
#
from diagrams.onprem.client import Users
# from diagrams.onprem.compute import Server
from diagrams.onprem.database import Cassandra
from diagrams.onprem.inmemory import Memcached # , Redis
from diagrams.onprem.network import Apache, Glassfish
# ============================================================================ #
# Generic - Datacentre, Operating Systems, Virtualization, Mobile Devices:
#
# https://diagrams.mingrammer.com/docs/nodes/generic
#
from diagrams.generic.place import Datacenter
# from diagrams.generic.os import LinuxGeneral
# ============================================================================ #
#
# Programming - flowcharts, programming languages and frameworks
#
# https://diagrams.mingrammer.com/docs/nodes/programming
#
from diagrams.programming.language import Java
# ============================================================================ #
#
# Custom - for creating a custom object using a downloaded image
#
# https://diagrams.mingrammer.com/docs/nodes/custom
#
from diagrams.custom import Custom
# ============================================================================ #
# pylint: disable=C0103
dns_url = "https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcTsXGy2J1B7jR56GNfbAhNXC0Nw9bokO9gHqw&usqp=CAU"
dns_icon = "dns.png"
f5_url = "https://upload.wikimedia.org/wikipedia/en/thumb/f/f9/F5_Networks_logo.svg/800px-F5_Networks_logo.svg.png"
f5_icon = "f5.png"
image_dir = 'images'
# NOTE: filename=images/ parameter to Diagram() changes the $PWD so icon path must be local dir,
# but at this point we're still at top level dir so must join to prefix it with the image_dir
# nosemgrep: python.lang.security.audit.dynamic-urllib-use-detected.dynamic-urllib-use-detected
urlretrieve(f5_url, os.path.join(image_dir, f5_icon))
# nosemgrep: python.lang.security.audit.dynamic-urllib-use-detected.dynamic-urllib-use-detected
urlretrieve(dns_url, os.path.join(image_dir, dns_icon))
graph_attr = {
"splines": "spline", # rounded arrows, much nicer
}
# pylint: disable=W0104,W0106
with Diagram('Multi-Datacenter GSLB F5 Java Stack',
show=not bool(os.environ.get('CI', 0)),
direction='LR',
filename='images/old_web_architecture', # override the default filename, without the extension
graph_attr=graph_attr,
):
gslb = Custom("DNS GSLB\nGlobal Server Load Balancing\nHealth Check\nDatacenters", dns_icon)
for n in range(1, 3, 1):
with Cluster(f"Datacenter {n}") as dc:
Datacenter(f"DC{n}")
lb = Custom("F5 Big-IP 8900\nLoad Balancer", f5_icon)
with Cluster("Cassandra") as cassandra:
cassandra_cluster = []
for _ in range(1, 3, 1):
cassandra_cluster.append(Cassandra(f"Cassandra node {_}"))
for i, node in enumerate(cassandra_cluster):
j = i + 1
if j >= len(cassandra_cluster):
j = 0
cassandra_cluster[i] >> cassandra_cluster[j]
for _ in range(2, 0, -1):
with Cluster(f"Server {_}"):
# Server("Server")
# LinuxGeneral("Linux")
httpd = Apache("Apache httpd")
glassfish = Glassfish("Glassfish")
java = Java("Java")
# redis = Redis("Redis")
memcached = Memcached("Memcached")
lb >> httpd >> glassfish
glassfish - java
java >> memcached
java >> cassandra_cluster
gslb >> lb
Users("Internet Users") \
>> gslb