TimothyYe

#!/bin/sh
docker rm -f $(docker ps -qa)
docker volume rm $(docker volume ls -q)
cleanupdirs="/var/lib/etcd /etc/kubernetes /etc/cni /opt/cni /var/lib/cni /var/run/calico /opt/rke"
for dir in $cleanupdirs; do
  echo "Removing $dir"
  rm -rf $dir
done

TimothyYe

#!/bin/bash
docker run -it --rm --name certbot \
  -v "/etc/letsencrypt:/etc/letsencrypt" \
  -v "/var/lib/letsencrypt:/var/lib/letsencrypt" \
  -v "/data/letsencrypt:/.secrets" \
  -p 80:80 \
  -p 443:443 \
  certbot/dns-cloudflare certonly \
  -d $1

TimothyYe

INTRO

Concurrency is a domain I have wanted to explore for a long time because the locks and the race conditions have always intimidated me. I recall somebody suggesting concurrency patterns in golang because they said "you share the data and not the variables".

Amused by that, I searched for "concurrency in golang" and bumped into this awesome slide by Rob Pike: https://talks.golang.org/2012/waza.slide#1 which does a great job of explaining channels, concurrency patterns and a mini-architecture of load-balancer (also explains the above one-liner).

Let's dig in:

Goroutines

TimothyYe

//assumes you have the following environment variables setup for AWS session creation 
// AWS_SDK_LOAD_CONFIG=1
// AWS_ACCESS_KEY_ID=XXXXXXXXXX
// AWS_SECRET_ACCESS_KEY=XXXXXXXX
// AWS_DEFAULT_REGION=us-east-1

package main

import (
	"fmt"

TimothyYe

知乎日报API

• v3

http://news-at.zhihu.com/api/3/stories/latest 获取今日日报

http://news-at.zhihu.com/api/3/news/latest 获取今日日报

http://news-at.zhihu.com/api/3/news/before/20140618 获取某个日期之前的日报

TimothyYe

package main

import (
	"fmt"
	"log"
	"os"
	"strings"

	"github.com/PuerkitoBio/goquery"
	"github.com/parnurzeal/gorequest"

TimothyYe

package main


import (
	"io"
	"os"
	"fmt"
	"sync"
	"strconv"
	"strings"

TimothyYe

#!/usr/bin/env bash
#
# Description: Auto test download & I/O speed script
#
# Copyright (C) 2015 - 2016 Teddysun <i@teddysun.com>
#
# Thanks: LookBack <admin@dwhd.org>
#
# URL: https://teddysun.com/444.html
#

TimothyYe

package main

import (
	"fmt"
	"log"
	"strconv"

	"github.com/miekg/dns"
)

TimothyYe

echo "deb http://httpredir.debian.org/debian jessie-backports main" > /etc/apt/sources.list.d/jessie-backports.list
apt update
apt install shadowsocks-libev curl -y

cat > /etc/shadowsocks-libev/config.json <<EOF
{
    "server":"0.0.0.0",
    "server_port":443,
    "local_port":1080,
    "password":"foobar!",