andreichernov

Helpful Links

Sign up for an IBM Cloud Account: https://ibm.biz/BdqF8K Python-K8s-Demo: https://github.com/pnbrown/python-k8s-demo

1. Official Kubernetes Training: https://kubernetes.io/training/

2. Kubernetes By Example (from our friends at Red Hat): https://kubernetesbyexample.com/

3. Gitbook (WIP): https://app.gitbook.com/@pnbrown/s/a-devs-intro-to-containers/

andreichernov

Tips to pass Certified Kubernetes Application Developer (CKAD) exam

Getting started Kubernetes :- 
  a) Book : Kubernetes: Up & Running 
  b) Practice practice & practice with CKAD Exercises 
          the Best Kubernetes CKAD sample exercises which cover all parts of the exam https://github.com/dgkanatsios/CKAD-exercises.
  c) Again, the best practice is use kubectl command well. Use kubectl to create resources (such as deployment, service, cronjobs, secret, configmap…) instead of creating them from manifest files. 
     Incase you have to edit manifest, use dry-run and -o yamlto save yaml file then edit manifest files.
   d) Kubernetes in Action by Mario Luksa. The book is the holy bible of Kubernetes, and it basically answer all questions you may have ;
   e) Whether or not you use Kubernetes at work, you should still provision your own cluster somewhere and play with it. 

andreichernov

NAME=pihole
TERM=xterm-256color
TAG='latest'
TZ="America/New_York"
DNS1=10.0.0.1
DNS2=10.0.0.1
IP=10.0.0.14

docker pull diginc/pi-hole:${TAG} &&
docker rm -f ${NAME}

andreichernov

# Simple No-ip.com Dynamic DNS Updater
#
# By Nathan Giesbrecht (http://nathangiesbrecht.com)
#
# 1) Install binary as described in no-ip.com's source file (assuming results in /usr/local/bin)
# 2) Run sudo /usr/local/bin/noip2 -C to generate configuration file
# 3) Copy this file noip2.service to /etc/systemd/system/
# 4) Execute `sudo systemctl enable noip2`
# 5) Execute `sudo systemctl start noip2`
#

andreichernov

Latency Comparison Numbers
--------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD

andreichernov

// пример объявления класса
class Date
{
public:
	void Next();
	void Print() const;

private:
	int year, month, day;
};

andreichernov

// Полиморфизм - классы-потомки могут изменять реализацию метода класса-предка, сохраняя его интерфейс
class Shape
{
public:
	virtual ~Shape()
	{
	}

	virtual double GetArea() const = 0;
};

andreichernov

class Plane
{
public: 
	void TakeOff();
	void Fly();
	void Land();
private:
	double m_fuel;
};

andreichernov

class IntStack
{
public:
	void Push(int value);
	int Pop();
	bool isEmpty() const;

private:
	// здесь располагаются данные
	// необходимые для реализации стека целых чисел

andreichernov

#include <stdio.h>

void Print(int number)
{
	printf("%d", number);
}
void Print(double number)
{
	printf("%.15f", number);
}