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Setting up custom python packages

I know of one or more reported cases where python imports failed. Because python packages are arranged with reference to the file system structure, running a module that imports a package that is one-level up in the file hierarchy results in an ImportError.

This error can be resolved in any of the following ways:

1. Export $PYTHONPATH variable in your terminal

export PYTHONPATH=.

osule

5 Focus points for available systems

• Build with Failure in Mind
• Always think about Scaling
• Mitigate risk
• Monitor availability
• Respond predictably and in a defined manner to issues

Characteristics of proper response to Dependency/Service Failures

• Predictability
• Understandability

osule

Do you grep?

Docker exposes formatting for most commands using Go templates so that it is possible to programmatically refine/format results of docker commands.

Lets explore some use cases.

Checking for containers created from a particular image.

docker ps --format '{{ if eq (js $.Image ) ""}} \

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{
  "name": "gists",
  "version": "1.0.0",
  "main": "index.js",
  "license": "MIT",
  "dependencies": {
    "@request/headers": "request/headers",
    "consolidate": "^0.14.5",
    "cookie-parser": "^1.4.3",
    "express": "^4.15.3",

osule

from flask import Flask, current_app, jsonify
from flask_assistant import Assistant, ask, tell, event, context_manager, request
from flask_assistant import ApiAi

app = Flask(__name__)
assist = Assistant(app,  '/')


@assist.action('fallback', is_fallback=True)
def say_response():

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#!/bin/bash

START_DATE=$(git --no-pager log $(git rev-list --max-parents=0 HEAD) --format="%at")
END_DATE=$(git --no-pager log -n 1 $(git rev-list HEAD^..HEAD) --format="%at")

DURATION=$(( $(($END_DATE - $START_DATE)) / 86400 ))

pluralize() {
    echo $1s
}

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Regex cheatsheet

• Match any character that is not repeated consecutively.

r"(.)(?!\1)"

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FROM nginx

RUN rm /etc/nginx/conf.d/default.conf

COPY nginx.conf /etc/nginx/nginx.conf
ADD sites-enabled/ /etc/nginx/sites-enabled

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upstream web-app {
   server canvas-web:9000;
}


server {
    listen 80 default_server;
    server_name _;

    root /var/www/html/canvas/public;

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FROM php:7.0-fpm

ENV WWW_HOME /var/www/html
ENV APP_HOME $WWW_HOME/canvas
ENV COMPOSER_HOME $WWW_HOME/.composer

COPY ./composer.json $APP_HOME/composer.json
COPY ./composer.lock $APP_HOME/composer.lock
WORKDIR $APP_HOME