squat

Azure VXLAN Issues

Introduction

Between June 24-25, the nodes in Tectonic clusters running on Azure automatically updated the OS from Container Linux 1353.8.0 to 1409.2.0. After this upgrade, the nodes began to experience increased latency and failure rate in requests. Interestingly, we found that the size of the HTTP request played a role in determining the success of requests to services running on the Kubernetes cluster. We found that setting the client's interface's MTU to 1370 made all requests succeed; incrementing the MTU to 1371 caused the failure of large HTTP requests to resurface. Additionally, enabling TCP MTU probing on the clients ensured all requests would succeed, albeit with increased latency. In order to identify the minimum set of circumstances needed to reproduce the issue, I ran several tests involving different network topologies.

brancz

apiVersion: v1
kind: Service
metadata:
  labels:
    app: alertmanager-cluster
  name: alertmanager-cluster-client
spec:
  ports:
  - name: alertmanager-web
    nodePort: 30900

brianredbeard

#!/usr/bin/env bash
set -e

# Set default values
: ${GENTOO_ARCH:=amd64}
: ${GENTOO_PROFILE:=""}
: ${GENTOO_PORTAGE:=no}

# Check for Gentoo profile, if there if a profile, add a "-"
if [ "${GENTOO_PROFILE}x" != "x" ]; then

bcwaldon

#cloud-config

coreos:
  etcd:
    addr: $private_ipv4:4001
    peer-addr: $private_ipv4:7001

  fleet:
    public-ip: $private_ipv4

proppy

isoc

isoc is yet another "standard" container format.

It brings together the best bits of Docker Image Specification 1.0 and App Container Specification 0.3.0+git into a comprehensive yet portable container archive format, at the cost of a "few" duplicated bytes.

Layout

An isoc image is a appc image embedded in a docker image, but also a docker image embedded in a appc image. Some people might describe it as an iso-contained container format.

eoinkelly

#!/bin/bash

# This script can be used in "run & hope" mode or you can use it as a recipe to
# do things manually - you probably want the latter if you really care about
# the data in your databases.
# Happy hacking
# /Eoin/

# Tell bash to stop if something goes wrong
set -e

jelbourn

/**
 * Example of using an angular provider to build an api service.
 * @author Jeremy Elbourn (@jelbourn)
 */

/** Namespace for the application. */
var app = {};

/******************************************************************************/

Huluk

If you want your terminal vim to open files you double click, follow the following steps (MacOS only):
 
1. Open Automator
2. Select Application
3. Copy the attached file
4. Save and set as default for opening files

Multiple files are opened in vim tabs.
If there is already a vim instance running, files are opened in it.

dergachev

OS X Screencast to animated GIF

This gist shows how to create a GIF screencast using only free OS X tools: QuickTime, ffmpeg, and gifsicle.

Instructions

To capture the video (filesize: 19MB), using the free "QuickTime Player" application:

jdarling

/*
  Migrated to: https://github.com/jdarling/Object.observe

  Tested against Chromium build with Object.observe and acts EXACTLY the same,
  though Chromium build is MUCH faster

  Trying to stay as close to the spec as possible,
  this is a work in progress, feel free to comment/update
  
  http://wiki.ecmascript.org/doku.php?id=harmony:observe