neolit123

convert Go type files to swagger.js

usage:

go run main.go --input=k8s.io/kubelet/config/v1beta1/types.go \
  --version=v1beta1 --title=kubelet.config.k8s.io > swagger.json

flags:

neolit123

diff --git a/cmd/kubeadm/app/apis/kubeadm/types.go b/cmd/kubeadm/app/apis/kubeadm/types.go
index 1759b765513..87557c2b754 100644
--- a/cmd/kubeadm/app/apis/kubeadm/types.go
+++ b/cmd/kubeadm/app/apis/kubeadm/types.go
@@ -451,6 +451,9 @@ type ComponentConfig interface {
 
 	// SetUserSupplied sets the state of the component config "user supplied" flag to, either true, or false.
 	SetUserSupplied(userSupplied bool)
+
+	// Mutate allows applying pre-defined modifications to the config before it's marshaled.

neolit123

testing concurrent join failures with kinder

this is a short guide for testing concurrent HA cluster join with kinder. currently it requires patching both kubeadm and kinder.

you need:

• go 1.12+
• docker 18.0{6|9} (known to work)
• clones of kuberentes/kubeadm and kubernetes/kubernetes
• a host machine with a good chunk of RAM and 2 CPU cores

neolit123

// performance comparison between RtlGenRandom and BCryptGenRandom
// with BCRYPT_USE_SYSTEM_PREFERRED_RNG.
//
// gcc -O3 -std=c99 -Wall test.c -lbcrypt && a
#include <windows.h>
#include <stdio.h>
#include <bcrypt.h>

BOOLEAN(APIENTRY *RtlGenRandom)
	(void *, ULONG);

neolit123

# `origin` is this repository, 'github' is the remote fork
# and '1.18-kubeadm-upgrade' is the remote branch
git checkout 1.18-kubeadm-upgrade
# create a patch between current PR branch and dev-1.18
# results in '0001-kubeadm-update-upgrade-documentation-for-1.18.patch'
git format-patch dev-1.18 
git checkout master
# delete old branches
# at this point dev-1.18 was rebased remoteley and just pulling it locally
# would cause conflicts.

neolit123

package main

import (
	"bufio"
	"fmt"
	"math"
	"math/rand"
	"os"
	"strconv"
	"time"

neolit123

the bellow bash script (k8s-release-dev-debug.sh) was executed for about 1 hour until it started catching problems in the cross-build.

it fetches versions using:

• gsutil cat gs://kubernetes-release-dev/ci/latest.txt
• gsutil cat gs://kubernetes-release-dev/ci/latest-bazel.txt

and based on the versions tries to gsutil ls the contents of:

neolit123

bufio
bytes
compress/gzip
context
crypto/rand
crypto/rsa
crypto/sha256
crypto/tls
crypto/x509
crypto/x509/pkix

neolit123

reviewers	title	content_template	weight
sig-cluster-lifecycle	Creating Highly Available Clusters with kubeadm	templates/task	60

{{% capture overview %}}

neolit123

package main

import (
	"fmt"

	"k8s.io/kubernetes/pkg/kubelet/apis/config"
	"sigs.k8s.io/yaml"
)

// https://github.com/kubernetes/kubernetes/blob/master/pkg/kubelet/apis/config/types.go