aimakun

.terraform/
*.pem
*.tf
*.tfstate
*.yaml
*.backup
istio-*/
cert-manager-*/
*.swp
env

aimakun

Upgrading Kubernetes Cluster with Kops, and Things to Watch Out For

Alright! I'd like to apologize for the inactivity for over a year. Very embarrassingly, I totally dropped the good habit. Anyways, today I'd like to share a not so advanced and much shorter walkthrough on how to upgrade Kubernetes with kops.

At Buffer, we host our own k8s (Kubernetes for short) cluster on AWS EC2 instances since we started our journey before AWS EKS. To do this effectively, we use kops. It's an amazing tool that manages pretty much all aspects of cluster management from creation, upgrade, updates and deletions. It never failed us.

How to start?

Okay, upgrading a cluster always makes people nervous, especially a production cluster. Trust me, I've been there! There is a saying, hope is not a strategy. So instead of hoping things will go smoothly, I always have bias that shit will hit the fan if you skip testing. Plus, good luck explaining to people

aimakun

package main

import (
	"addressbook/contact"
	"io/ioutil"
	"net/http"
	"net/http/httptest"
	"strings"
	"testing"
)

aimakun

<?php
/* Require: field_image (image field, available in standard profile) */
$view = new view();
$view->name = 'abstract_nodes';
$view->description = 'Clone this view to create node list page / block';
$view->tag = 'default';
$view->base_table = 'node';
$view->human_name = 'Abstract nodes';
$view->core = 7;
$view->api_version = '3.0';

aimakun

<?php
function tis620_to_utf8($text) {
  $utf8 = "";
  for ($i = 0; $i < strlen($text); $i++) {
    $a = substr($text, $i, 1);
    $val = ord($a);

    if ($val < 0x80) {
      $utf8 .= $a;
    } elseif ((0xA1 <= $val && $val < 0xDA) || (0xDF <= $val && $val <= 0xFB)) {

aimakun

sudo add-apt-repository ppa:webupd8team/sublime-text-2
sudo apt-get update
sudo apt-get install sublime-text