squidpickles

Multiplatform (amd64 and arm) Kubernetes cluster setup

The official guide for setting up Kubernetes using kubeadm works well for clusters of one architecture. But, the main problem that crops up is the kube-proxy image defaults to the architecture of the master node (where kubeadm was run in the first place).

This causes issues when arm nodes join the cluster, as they will try to execute the amd64 version of kube-proxy, and will fail.

It turns out that the pod running kube-proxy is configured using a DaemonSet. With a small edit to the configuration, it's possible to create multiple DaemonSets—one for each architecture.

Steps

Follow the instructions at https://kubernetes.io/docs/setup/independent/create-cluster-kubeadm/ for setting up the master node. I've been using Weave Net as the network plugin; it see

zulhfreelancer

1. Assuming you have multiple Heroku apps and Git remote like so:

development https://git.heroku.com/xxx.git (fetch)
development https://git.heroku.com/xxx.git (push)
origin      git@bitbucket.org:xxx/xxx.git  (fetch)
origin      git@bitbucket.org:xxx/xxx.git  (push)
production  https://git.heroku.com/xxx.git (fetch)
production  https://git.heroku.com/xxx.git (push)
staging https://git.heroku.com/xxx.git (fetch)

noromanba

disable HUD on Ubuntu Unity DE

HUD (Heads Up Display) starting up when tap Alt (Default)

install

$ sudo apt-get install compizconfig-settings-manager

disable

typehorror

Flask-SQLAlchemy Caching

The following gist is an extract of the article Flask-SQLAlchemy Caching. It allows automated simple cache query and invalidation of cache relations through event among other features.

Usage

retrieve one object

# pulling one User object

user = User.query.get(1)

mattes

# using VirtualBox version $VBOX_VERSION

FROM boot2docker/boot2docker
RUN apt-get install p7zip-full

RUN mkdir -p /vboxguest && \
    cd /vboxguest && \
    curl -L -o vboxguest.iso http://download.virtualbox.org/virtualbox/$VBOX_VERSION/VBoxGuestAdditions_$VBOX_VERSION.iso && \
    7z x vboxguest.iso -ir'!VBoxLinuxAdditions.run' && \
    sh VBoxLinuxAdditions.run --noexec --target . && \

lyoshenka

Intro

The plan is to create a pair of executables (ngrok and ngrokd) that are connected with a self-signed SSL cert. Since the client and server executables are paired, you won't be able to use any other ngrok to connect to this ngrokd, and vice versa.

DNS

Add two DNS records: one for the base domain and one for the wildcard domain. For example, if your base domain is domain.com, you'll need a record for that and for *.domain.com.

Different Operating Systems

menghan

undo and redo

• u/^R/U
• :undo + <num> / g- / g+ : 前者用于知道跳转去向，后者用于不知道的
• :undolist
• :earlier 10s / 10h / 1m / :later

cyfdecyf

// run with go test -test.bench Bench

package main

import (
	// "fmt"
	"runtime"
	"sync"
	"sync/atomic"
	"testing"

onlytiancai

python项目通用组件和基础服务

很多公司都大量使用了python，其中有一些开发规范，code guidline， 通用组件，基础框架是可以共用的。

每个公司都自己搞一套, 太浪费人力，我想开一帖和大家讨论一下这些python基础设施的搭建。

原则是我们尽量不重新发明轮子，但开源组件这么多，也要有个挑选的过程和组合使用的过程，在这里讨论一下。

另一方面，有些开源组件虽然强大，但我们不能完全的驾驭它，或只使用其中很少的一部分，我们就可以考虑用python实现一个简单的轮子，可控性更强，最好不要超过300行代码。

andreyvit

tmux cheat sheet

(C-x means ctrl+x, M-x means alt+x)

Prefix key

The default prefix is C-b. If you (or your muscle memory) prefer C-a, you need to add this to ~/.tmux.conf:

remap prefix to Control + a