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#!/bin/bash

FILES=$@

echo "Migrate: $FILES"

sed -i "s/errors.Wrapf(\(.*\), \"\(.*\)\", \(.*\))/fmt.Errorf(\"\2: %w\", \3, \1)/g" $FILES
sed -i "s/errors.Wrap(\(.*\), \"\(.*\)\")/fmt.Errorf(\"\2: %w\", \1)/g" $FILES
sed -i "s/errors.Errorf/fmt.Errorf/g" $FILES
goimports -w .

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Kubernetes Master Nodes Backup for Kops on AWS - A step-by-step Guide

For those who have been using kops for a while should know the upgrade from 1.11 to 1.12 poses a greater risk, as it will upgrade etcd2 to etcd3.

Since this upgrade is disruptive to the control plane (master nodes), although brief, it's still something we take very seriously because nearly all the Buffer production services are running on this single cluster. We felt a more thorough backup process than the currently implemented Heptio Velero was needed.

To my surprises, my Google searches didn't yield any useful result on how to carry out the backup steps. To be fair, there are a few articles that are specifically for backing up master nodes created by kubeedm but nothing too concrete for `kop

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#!/bin/sh
# Launch a Pod ab-using a hostPath mount to land on a Kubernetes node cluster as root
# without requiring `privileged: true`, in particular can abuse `DenyExecOnPrivileged`
# admission controller.
# Pod command in turn runs a privileged container using node's /var/run/docker.sock.
#
# Tweaked for PKS nodes, which run their docker stuff from different
# /var/vcap/... paths
node=${1}
case "${node}" in

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Source: https://web.archive.org/web/20141216073338/https://gkbrk.com/blog/read?name=reverse_engineering_the_speedtest_net_protocol Author: Gökberk Yaltıraklı

Reverse Engineering the Speedtest.net Protocol

After finishing my command line speed tester written in Rust, I didn't have a proper blog to document this process. A few days ago I wrapped up a simple blogging script in Python so hopefully it works good enough to explain how everything works.

By now I have already figured out the whole protocol for performing a speed test but I will write all the steps that I took so you can learn how to reverse engineer a simple protocol.

The code that I wrote can be found at https://github.com/gkbrk/speedtest-rust.

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負荷の管理

• 100%の時間 利用可能なサービスはない
  • 配慮のないクライアント
  • 50倍の要求
    • （訳注: 上記2つはPokemon Goのことでもある）
  • スラフィックのスパイク
  • 海底ケーブルの切断
• 私達のサービスに依存するユーザーがいる

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package codec

import "error"

type CSV struct{}

func (c CSV) String() string {
    return "csv"
}

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summary text. **Not render bold text on GitHub**

This is hidden details text without <div>.

This is hidden details text within <div>.

Can write many things.

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Printing addresses of empty structs affects their values

golang/go#25699

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pandemonium-china

94px

310px

581px

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$ mono ftplugin/bin/neovimfs.exe
Unhandled Exception:
System.MissingMethodException: Method 'Suave.Web.startWebServer' not found.
[ERROR] FATAL UNHANDLED EXCEPTION: System.MissingMethodException: Method 'Suave.Web.startWebServer' not found.