type Model interface {
comparable
TableName() (schema, table string)
}
type Change[T Model] struct {
New T
Old T
}
View generic.md
View mutating.go
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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" | |
) |
View authenticate.go
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package authenticate | |
import ( | |
"encoding/json" | |
"errors" | |
"log" | |
"net/http" | |
"strings" | |
authentication "k8s.io/api/authentication/v1beta1" | |
) |
View validating.go
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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" |
View k8s.md
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
View concurrent.txt
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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 |
View slices.go
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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 |
View e_net.sh
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#!/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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