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Setup Kubernetes Cluster On-Premise using kubeadm

Why would you do this?

You own your bare metal infrastructure.
You want to take advantage of Kubernetes.
You do not wish to migrate your application to the cloud

Why it will not always suit your needs?

Ubuntu-Server-Hardening

1. Secure Shared Memory

What is shared memory?

Shared memory is an efficient means of passing data between programs. Because two or more processes can use the same memory space, it has been discovered that, since shared memory is, by default, mounted as read/write, the /run/shm space can be easily exploited. That translates to a weakened state of security.

If you’re unaware, shared memory can be used in an attack against a running service. Because of this, you’ll want to secure that portion of system memory.

	############ REPLACE app/models/enterprise_token.rb in the source code with this file! ################
	############ also be sure to RESTART OpenProject after replacing the file. ################
	############ it doesn't show that enterprise mode is enabled in the settings, but all ################
	############ enterprise mode features, such as KanBan boards, are enabled. ################
	#-- copyright
	# OpenProject is an open source project management software.
	# Copyright (C) 2012-2023 the OpenProject GmbH
	#
	# This program is free software; you can redistribute it and/or
	# modify it under the terms of the GNU General Public License version 3.