Skip to content

Instantly share code, notes, and snippets.

Avatar
😩
knowledge

Koichi Shiraishi zchee

😩
knowledge
View GitHub Profile
@zchee
zchee / Public_Time_Servers.md
Created May 24, 2020 — forked from mutin-sa/Public_Time_Servers.md
List of Top Public Time Servers
View Public_Time_Servers.md

Google Public NTP [AS15169]:

time.google.com

time1.google.com

time2.google.com

time3.google.com

@zchee
zchee / fastaltmod.c
Created May 19, 2020 — forked from lemire/fastaltmod.c
fast alternative to the modulo reduction (code sample)
View fastaltmod.c
#include <iostream>
#include <cstdint>
using namespace std;
// we are going to generate random numbers using
// an xorshift generator
static uint32_t xorshift_y;
@zchee
zchee / build-xnu-6153.11.26.sh
Created Apr 27, 2020 — forked from knightsc/build-xnu-6153.11.26.sh
A script to build XNU version 6153.11.26 (macOS Catalina 10.15).
View build-xnu-6153.11.26.sh
#! /bin/bash
#
# build-xnu-6153.11.26.sh
# Scott Knight
#
# Based on the script by Brandon Azad
# https://gist.github.com/bazad/654959120a423b226dc564073b435453
#
# A script showing how to build XNU version 6153.11.26 on macOS Catalina
# 10.15 with Xcode 11.13.1.
@zchee
zchee / defer.sh
Created Apr 26, 2020 — forked from phemmer/defer.sh
bash defer function - just like go's defer()
View defer.sh
function _run_deferred() {
local _depth="$BASHPID.${#FUNCNAME[@]}"
[[ "$_depth" != "$_deferred_depth" ]] && return
local opt=$-
set +e
for (( i=${#_deferred[@]} - 1; i >= 0; i-- )); do
eval "${_deferred[i]}"
done
[[ "$opt" == *e* ]] && set -e
}
@zchee
zchee / EndpointSecurityDemo.m
Created Apr 3, 2020 — forked from Omar-Ikram/EndpointSecurityDemo.m
A demo of using Apple's new EndpointSecurity framework - tested on macOS Catalina 10.15 (19A583)
View EndpointSecurityDemo.m
//
// main.m
// EndpointSecurityDemo
//
// Created by Omar Ikram on 17/06/2019 - Catalina 10.15 Beta 1 (19A471t)
// Updated by Omar Ikram on 15/08/2019 - Catalina 10.15 Beta 5 (19A526h)
// Updated by Omar Ikram on 01/12/2019 - Catalina 10.15 (19A583)
//
#import <Foundation/Foundation.h>
@zchee
zchee / ANSI.md
Created Feb 13, 2020 — forked from fnky/ANSI.md
ANSI Escape Codes
View ANSI.md

ANSI Escape Sequences

Standard escape codes are prefixed with Escape:

  • Ctrl-Key: ^[
  • Octal: \033
  • Unicode: \u001b
  • Hexadecimal: \x1b
  • Decimal: 27
@zchee
zchee / spinnaker-rbac.yaml
Created Dec 10, 2019 — forked from rantav/spinnaker-rbac.yaml
Kubernetes RBAC for Spinnaker
View spinnaker-rbac.yaml
# Authorize read-write in the default namespace. Add this Role and the below RoleBinding to every namespace spinnaker deploys artifacts to
apiVersion: rbac.authorization.k8s.io/v1
kind: Role
metadata:
name: spinnaker-role
namespace: default
rules:
- apiGroups: [""]
resources: ["namespaces", "events", "replicationcontrollers", "serviceaccounts", "pods/logs"]
@zchee
zchee / disable.sh
Created Dec 5, 2019 — forked from pwnsdx/disable.sh
Disable bunch of #$!@ in Catalina
View disable.sh
#!/bin/bash
# IMPORTANT: Don't forget to logout from your Apple ID in the settings before running it!
# IMPORTANT: You will need to run this script from Recovery. In fact, macOS Catalina brings read-only filesystem which prevent this script from working from the main OS.
# This script needs to be run from the volume you wish to use.
# E.g. run it like this: cd /Volumes/Macintosh\ HD && sh /Volumes/Macintosh\ HD/Users/sabri/Desktop/disable.sh
# WARNING: It might disable things that you may not like. Please double check the services in the TODISABLE vars.
# Get active services: launchctl list | grep -v "\-\t0"
# Find a service: grep -lR [service] /System/Library/Launch* /Library/Launch* ~/Library/LaunchAgents
@zchee
zchee / go_1.13_error_migration.bash
Created Oct 16, 2019 — forked from Peltoche/go_1.13_error_migration.bash
Go 1.13 error format migration script
View go_1.13_error_migration.bash
#!/bin/bash
FILES=$@
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 .
View Kubernetes Master Nodes Backup for Kops on AWS - A step-by-step Guide.md

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

You can’t perform that action at this time.