Konstantinos Karampogias karampok

## kcgroups.md

      
              1 file
            
          
              9 forks
            
          
              4 comments
            
          
              33 stars
            
          
                mcastelino
                / kcgroups.md
            
            
              Last active
              April 12, 2024 08:58
            
              
                Kubernetes and cgroups Resource Management/Static cpuManagerPolicy/Memory and Resource Isolation & Scheduling
              
          
    Overview

The goal of this document to cover all aspects of Kubernetes management, including how resources are expressed, constrained and accounted for. This started a way to ensure that alternate container runtime implementation like Kata containers will behave from a resource accounting and consumption point of view in the same manner as runc.
Location of the latest version of this document: https://gist.github.com/mcastelino/b8ce9a70b00ee56036dadd70ded53e9f
If you do not understand cgroups please refer to a quick primer at the bottom of this document. This will help you understand how the resource enforcement actually works.
Kubernetes Resource Management


## env.bosh.password.sh
echo c1oudc0w | mkpasswd --method=sha-512 --salt='4gDD3aV0rdqlrKC' -s
# echo <password> | mkpasswd --method=sha-512 --salt='<salt for hash>' -s

## System Design.md

      
              1 file
            
          
              2614 forks
            
          
              58 comments
            
          
              9410 stars
            
          
                vasanthk
                / System Design.md
            
            
              Last active
              May 12, 2024 03:33
            
              
                System Design Cheatsheet
              
          
    System Design Cheatsheet


Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps


Clarify and agree on the scope of the system


User cases (description of sequences of events that, taken together, lead to a system doing something useful)

Who is going to use it?
How are they going to use it?


## gist:8c74da455cce3d36eb68

      
              1 file
            
          
              11 forks
            
          
              8 comments
            
          
              75 stars
            
          
                lestoni
                / gist:8c74da455cce3d36eb68
            
            
              Last active
              April 12, 2024 18:15
            
              
                vim folding cheatsheet
              
          
    via (https://www.linux.com/learn/tutorials/442438-vim-tips-folding-fun)

zf#j creates a fold from the cursor down # lines.
zf/string creates a fold from the cursor to string .
zj moves the cursor to the next fold.
zk moves the cursor to the previous fold.
zo opens a fold at the cursor.
zO opens all folds at the cursor.
zm increases the foldlevel by one.
zM closes all open folds.


## docker-ovs.md

      
              3 files
            
          
              23 forks
            
          
              4 comments
            
          
              61 stars
            
          
                noteed
                / docker-ovs.md
            
            
              Last active
              December 29, 2023 07:07
            
              
                Docker - Open vSwitch setup
              
          
    Running Docker on two hosts, bridged with Open vSwitch

This Gist shows how to use Open vSwitch to bridge Docker containers on two
hosts. It is based on this blog post
http://goldmann.pl/blog/2014/01/21/connecting-docker-containers-on-multiple-hosts/.
A similar Gist using Tinc instead of Open vSwitch is available:
https://gist.github.com/noteed/11031504.
Setup


## lxc-ovsup
#!/bin/bash

BRIDGE="br-int"
ovs-vsctl --may-exist add-br $BRIDGE
ovs-vsctl --if-exists del-port $BRIDGE $5
ovs-vsctl --may-exist add-port $BRIDGE $5

## openldap_passwd.py
#!/usr/bin/env python
"""
http://www.openldap.org/faq/data/cache/347.html

As seen working on Ubuntu 12.04 with OpenLDAP 2.4.28-1.1ubuntu4

Author: Roberto Aguilar <roberto@baremetal.io>
"""
import hashlib
import os
	echo c1oudc0w \| mkpasswd --method=sha-512 --salt='4gDD3aV0rdqlrKC' -s
	# echo <password> \| mkpasswd --method=sha-512 --salt='<salt for hash>' -s
	#!/bin/bash

	BRIDGE="br-int"
	ovs-vsctl --may-exist add-br $BRIDGE
	ovs-vsctl --if-exists del-port $BRIDGE $5
	ovs-vsctl --may-exist add-port $BRIDGE $5
	#!/usr/bin/env python
	"""
	http://www.openldap.org/faq/data/cache/347.html

	As seen working on Ubuntu 12.04 with OpenLDAP 2.4.28-1.1ubuntu4

	Author: Roberto Aguilar <roberto@baremetal.io>
	"""
	import hashlib
	import os