korjavin

{
  "_nodes" : {
    "total" : 7,
    "successful" : 7,
    "failed" : 0
  },
  "cluster_name" : "elasticsearch",
  "nodes" : {
    "aLOsdqVRRgisq9kNEDVafQ" : {
      "timestamp" : 1551851149929,

korjavin

apiVersion: apps/v1
kind: Deployment
metadata:
  namespace: default
  name: elasticsearch-master
  labels:
    component: elasticsearch
    role: master
spec:
  replicas: 3

korjavin

Задача

Написать сервис tcp-proxy, которая принимает соединения от клиентов (tcp-client) и проксирует их к внешнему сервису (tcp server).

Протокол обмена

• Клиент отправляет сообщение: plain-text строка ограниченная \n
• Сервер возвращает число символов в строке и \n.

Функции прокси

• При отключении клиента отключается от сервера
• При отключении сервера прозрачно для клиента переподключается к серверу

korjavin

#!/bin/bash

# compiled from https://docs.docker.com/engine/installation/linux/debian/#/debian-jessie-80-64-bit

sudo apt-get update
sudo apt-get dist-upgrade -y
sudo apt-get install apt-transport-https ca-certificates -y

sudo sh -c "echo deb https://apt.dockerproject.org/repo debian-jessie main > /etc/apt/sources.list.d/docker.list"
sudo apt-key adv --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys 58118E89F3A912897C070ADBF76221572C52609D

korjavin

package main

import (
	"encoding/json"
	"github.com/tidwall/buntdb"
	"github.com/tidwall/gjson"
	"log"
	"strconv"
	"time"
)

korjavin

package main

import (
	"encoding/json"
	"github.com/tidwall/buntdb"
	"github.com/tidwall/gjson"
	"log"
	"strconv"
)

korjavin

#!/usr/bin/env bash

# install docker
# https://docs.docker.com/engine/installation/linux/ubuntulinux/

# install docker-compose
# https://docs.docker.com/compose/install/

# install letsencrypt
# https://www.digitalocean.com/community/tutorials/how-to-secure-nginx-with-let-s-encrypt-on-ubuntu-16-04

korjavin

Device Model:     Espada EDM-SA.51-016GMJ
Serial Number:    984062700147
LU WWN Device Id: 5 000000 000000000
Firmware Version: 130206
User Capacity:    16 013 942 784 bytes [16,0 GB]
Sector Size:      512 bytes logical/physical
Rotation Rate:    Solid State Device
Form Factor:      2.5 inches
Device is:        Not in smartctl database [for details use: -P showall]
ATA Version is:   ATA8-ACS (minor revision not indicated)

korjavin

#!env python
import sys

(lastKey,minDist,minVals)=(None,0,'')

for line in sys.stdin:
    arr =  line.strip().split("\t")
    v=arr[0]
    d=arr[1]
    vals=arr[2].replace('{','').replace('}','')

korjavin

#!/usr/bin/env perl
use 5.010;
use open qw(:locale);
use strict;
use utf8;
use warnings qw(all);

use Mojo::UserAgent;
use Data::Dumper;