Yapcheekian’s gists

Yapcheekian / tapTweak.js

Created October 23, 2024 01:44

	const internal_priv = ECPair.fromPrivateKey(
	Buffer.from(
	"1229101a0fcf2104e8808dab35661134aa5903867d44deb73ce1c7e4eb925be8",
	"hex",
	),
	);
	const pub_key = toXOnly(internal_priv.publicKey);

	const coldReserveScriptText1 = `${bitcoin.script.number
	.encode(144)

Yapcheekian / generic.md

Last active August 9, 2023 04:05

generic.md

type Model interface {
	comparable
	TableName() (schema, table string)
}

type Change[T Model] struct {
	New T
	Old T
}

Yapcheekian / mutating.go

Created March 4, 2022 00:33

mutating webhook in k8s

	package mutator

	import (
	"encoding/json"
	"log"
	"net/http"
	admission "k8s.io/api/admission/v1"
	corev1 "k8s.io/api/core/v1"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	)

Yapcheekian / authenticate.go

Created March 4, 2022 00:16

authentication webhook is k8s

	package authenticate

	import (
	"encoding/json"
	"errors"
	"log"
	"net/http"
	"strings"
	authentication "k8s.io/api/authentication/v1beta1"
	)

Yapcheekian / authorization.go

Created March 4, 2022 00:13

k8s authorization webhook

	package authorize

	import (
	"encoding/json"
	"fmt"
	"log"
	"net/http"
	authorization "k8s.io/api/authorization/v1beta1"
	)

Yapcheekian / validating.go

Created March 4, 2022 00:11

validating webhook

	package validate

	import (
	"encoding/json"
	"log"
	"net/http"
	"regexp"
	admission "k8s.io/api/admission/v1"
	corev1 "k8s.io/api/core/v1"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"

Yapcheekian / k8s.md

Last active March 4, 2022 05:53

K8s deep dive

docker run -it --rm k8s.gcr.io/kube-apiserver:v1.19.0 kube-apiserver --help

docker run -it --rm k8s.gcr.io/kube-scheduler:v1.19.0 kube-scheduler --help

Custom Scheduler

apiVersion: v1
kind: Pod

Yapcheekian / concurrent.txt

Last active December 31, 2021 10:42

Process vs coroutines vs thread

	https://stackoverflow.com/questions/3324643/processes-threads-green-threads-protothreads-fibers-coroutines-whats-the

	https://stackoverflow.com/questions/46864623/which-of-coroutines-goroutines-and-kotlin-coroutines-are-faster

Yapcheekian / slices.go

Created August 9, 2021 13:56

Notes on go slices

	var arrNum [5]int // this is an array
	var sliceNum []int // this is a slice

	fmt.Println(arrNum) // [5]int{0,0,0,0,0} array have initial value of zero value
	fmt.Println(sliceNum) // []int(nil) slice have initial value of nil value

	sliceNum == nil // true

	arrNum[0] = 1 // ok
	sliceNum[0] = 1 // compile time error because you cannot assign values to nil

Yapcheekian / e_net.sh

Last active August 5, 2021 00:46

capture pod packet

	#!/usr/bin/env bash
	# https://mp.weixin.qq.com/s?__biz=MzA4MzIwNTc4NQ==&mid=2247484821&idx=1&sn=aaa173a8b913cc759c56efe05d2c15ad&chksm=9ffb4e63a88cc7755ca720b3886946245246d8e57687cf209ad47f61a186cc290c04ef57fc91&scene=21#wechat_redirect

	function e_net() {
	set -eu
	pod=`kubectl get pod ${pod_name} -n ${namespace} -o template --template='{{range .status.containerStatuses}}{{.containerID}}{{end}}' \| sed 's/docker:\/\/$.*$$/\1/'`
	pid=`docker inspect -f {{.State.Pid}} $pod`
	echo -e "\033[32m Entering pod netns for ${namespace}/${pod_name} \033[0m\n"
	cmd="nsenter -n -t ${pid}"
	echo -e "\033[32m Execute the command: ${cmd} \033[0m"

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