mcastelino

Kubernetes Pod Monitors & Re-Labeling

The Prometheus operator offers a simple method to scrape metrics from any Pod. However in many cases the Pod itself is not what you are monitoring but the Pod is used to expose metrics that relate to the Node. In such cases what the user cares about is the Node on which the Pod runs and not the Pod itself.

By default when using PodMonitor all the time series data will have the instance set to the Pod's name. Also the Pod or the Daemon set that the Pod was part of may be deleted, redeployed multiple times over the lifetime of the node. This means that the user will need to perform the mapping between the Pod and the Node on which it run.

However Prometheus allows the instance name (among other labels) to be relabeled in a very simple manner as shown below.

apiVersion: monitoring.coreos.com/v1

jacobtomlinson

#!/bin/bash
#
# A script to update your /etc/hosts file from minikube ingest records
#
# Installation
# ------------
# curl -L https://gist.github.com/jacobtomlinson/4b835d807ebcea73c6c8f602613803d4/raw/minikube-update-hosts.sh > /usr/local/bin/minikube-update-hosts
# chmod +x /usr/local/bin/minikube-update-hosts

set -e

bvaughn

React lifecycle cheatsheet

Method	Side effects1	State updates2	Example uses
Mounting
componentWillMount		✓	Constructor equivalent for createClass
render			Create and return element(s)
componentDidMount	✓	✓	DOM manipulations, network requests, etc.
Updating
componentWillReceiveProps		✓	Update state based on changed props

unnamed777

 Hammerspoon for karabiner

rauchg

require-from-twitter

Since Twitter doesn't have an edit button, it's a suitable host for JavaScript modules.

How to use

Source tweet: https://twitter.com/rauchg/status/712799807073419264

const leftPad = await requireFromTwitter('712799807073419264');

SerafimArts

• На iOS устройствах числовые значения подчёркиваются синим. Эта проблема возникает из-за того, что iOS устройства по умолчанию считают все числа похожие на телефонные номера - телефонными номерами. Решается добавлением <meta name="format-detection" content="telephone=no" /> Тоже самое касается адреса: <meta name="format-detection" content="address=no" />

• Пользователь может уменьшать и увеличивать приложение. Решается добавляением тега <meta name="viewport" content="user-scalable=no, initial-scale=1, maximum-scale=1, minimum-scale=1, width=device-width, height=device-height, target-densitydpi=device-dpi" />

• Ссылки нажимаются с задержкой (примерно 300ms). Решается подпиской на событие touchstart и принудительной инициализацией события click после него. Если проблема всё равно возникает - ничего не поделать, надо облегчать dom. Как вариант - можно использовать библиотеку, посоветанную @adubovsky ниже в комментариях: https://gist.github.com/SerafimArts/de9900f99

squiddy

In werkzeug.formparser change MultiPartParser.parse_parts. Look for

elif ellt == _cont:
  _write(ell)
  # if we write into memory and there is a memory size limit we
  # count the number of bytes in memory and raise an exception if
  # there is too much data in memory.
  if guard_memory:
    in_memory += len(ell)
    if in_memory > self.max_form_memory_size:

hrldcpr

One-line Tree in Python

Using Python's built-in defaultdict we can easily define a tree data structure:

def tree(): return defaultdict(tree)

That's it!