Pavel Tishkov fl64

Tcpdump

Tcpdump is a commandline tool that is used to dump traffic on a network. This tool comes in hand when you want to analyse network captures within the command line. Basically it can do most of the wireshark job.

NOTE This guide might not be complete it just serve as a reference to me.

Additional Note & Reference

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

Requirements

socat
kubectl with proper ~/.kube/config that can connect to your cluster
Working knowledge of kubectl client
OpenSSH client

How does it work?

kubectl does port forwarding to sshd port of your pod. I'm using pm2 process managed to keep my services alive in my workstation container. If you have only sshd, easiest to use is dropbear
ProxyCommand of OpenSSH client uses socat to redirect two way fd - to forwarded port of kubectl
Voila! You are in

An Ansible summary

Jon Warbrick, July 2014, V3.2 (for Ansible 1.7)

Configuration file

intro_configuration.html

First one found from of

	#!/bin/bash
	#
	# Written by Chris Arceneaux
	# GitHub: https://github.com/carceneaux
	# Email: [email protected]
	# Website: http://arsano.ninja
	#
	# Note: This code is a stop-gap to erase Job Artifacts for a project. I HIGHLY recommend you leverage
	# "artifacts:expire_in" in your .gitlab-ci.yml
	#

	#!/usr/bin/env python
	from http import HTTPStatus
	from http.server import BaseHTTPRequestHandler, ThreadingHTTPServer
	import base64
	import json
	import logging
	import os
	import os.path
	import ssl

	###################################################
	##
	## Alertmanager YAML configuration for routing.
	##
	## Will route alerts with a code_owner label to the slack-code-owners receiver
	## configured above, but will continue processing them to send to both a
	## central Slack channel (slack-monitoring) and PagerDuty receivers
	## (pd-warning and pd-critical)
	##

	#!/usr/bin/env ansible-playbook
	---
	- name: Test truthiness
	hosts: localhost
	gather_facts: False
	vars:
	truthy_vars:
	# TRUE
	- True
	- 1

	MAKE := make --no-print-directory

	DESCRIBE := $(shell git describe --match "v*" --always --tags)
	DESCRIBE_PARTS := $(subst -, ,$(DESCRIBE))

	VERSION_TAG := $(word 1,$(DESCRIBE_PARTS))
	COMMITS_SINCE_TAG := $(word 2,$(DESCRIBE_PARTS))

	VERSION := $(subst v,,$(VERSION_TAG))
	VERSION_PARTS := $(subst ., ,$(VERSION))