mullikine

Conquering Kubernetes with Emacs

Specific Annoying workflow

Listing pods with kubectl get pods, then select a pod name and copy paste it into kubectl logs [pod name]

Why?

• I want to streamline my workflow and stop using the terminal
• learn more about kubernetes
• main kubernetes extension for Emacs out there is greedy for permissions

mullikine

;;; Commentary
;;
;; Allows for more compact anonymous functions.  The following
;; examples demonstrate the usage.
;;
;;     ;; partial application with `curry'
;;     (mapcar (» #'+ 2) '(1 2 3 4)) ; => (3 4 5 6)
;;
;;     ;; alternate order of arguments with `rcurry'
;;     (mapcar (« #'- 1) '(1 2 3 4)) ; => (0 1 2 3)

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#!/bin/bash
# A bash-wrapped version of http://www.commandlinefu.com/commands/view/9536/un-unzip-a-file
if [ $# -eq 0 ]; then
    echo "Un-unzips a file without a root folder."
    echo "Usage: ununzip <filename>"
    exit 1
elif [ ! -e $1 ]; then
    echo "File not found: $1"
    exit 1
fi

mullikine

# Images
docker build -t friendlyname .  # Create image using this directory's Dockerfile
docker image ls -a                             # List all images on this machine
docker image rm <image id>            # Remove specified image from this machine
docker image rm $(docker image ls -a -q)   # Remove all images from this machine
docker image prune                                      # remove dangling images
docker tag <image> username/repository:tag  # Tag <image> for upload to registry
docker push username/repository:tag            # Upload tagged image to registry
docker run username/repository:tag                   # Run image from a registry

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Docker Commands, Help & Tips

Show commands & management commands

$ docker

Docker version info

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Latency Comparison Numbers
--------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD

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iniital board:
              1         3         2         5         4         2         2         3   
    1     12345678  .....6..  12345678  12345678  ....5...  12345678  1.......  12345678  3
    4     12345678  .2......  1.......  12345678  12345678  12345678  12345678  12345678  2
    3     .2......  12345678  12345678  12345678  .....6..  12345678  ..3.....  12345678  5
    3     12345678  12345678  12345678  12345678  12345678  .......8  12345678  12345678  2
    2     12345678  12345678  .....6..  12345678  12345678  ..3.....  ......7.  12345678  3
    2     12345678  12345678  ....5...  12345678  12345678  12345678  12345678  12345678  1
    4     12345678  12345678  12345678  12345678  12345678  12345678  12345678  ..3.....  3
    3     12345678  12345678  12345678  12345678  ..3.....  12345678  12345678  12345678  3

mullikine

Transforming Code into Beautiful, Idiomatic Python

Notes from Raymond Hettinger's talk at pycon US 2013 video, slides.

The code examples and direct quotes are all from Raymond's talk. I've reproduced them here for my own edification and the hopes that others will find them as handy as I have!

Looping over a range of numbers

for i in [0, 1, 2, 3, 4, 5]: