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Kubernetes Commands

Helper setup to edit .yaml files with Vim:

VIM Setup for Yaml files

List of general purpose commands for Kubernetes management:

PODS
Create Deployments

Django Migrations without Downtime

The following instructions describe a set of processes allowing you to run Django database migrations against a production database without having to bring the web service down.

Note that in the below instructions, migrations are all run manually at explicit points, and are not an automatic part of the deployment process.

Adding Fields or Tables

Adding a (nullable) field or a new table

Make the model or column addition in your code.

Download docker-compose.yml to dir named sentry
Change SENTRY_SECRET_KEY to random 32 char string
Run docker-compose up -d
Run docker-compose exec sentry sentry upgrade to setup database and create admin user
(Optional) Run docker-compose exec sentry pip install sentry-slack if you want slack plugin, it can be done later
Run docker-compose restart sentry
Sentry is now running on public port 9000

https://docs.docker.com/compose/compose-file/#env_file

Optimizing postgresql table for more than 100K inserts per second

Create UNLOGGED table. This reduces the amount of data written to persistent storage by up to 2x.
Set WITH (autovacuum_enabled=false) on the table. This saves CPU time and IO bandwidth on useless vacuuming of the table (since we never DELETE or UPDATE the table).
Insert rows with COPY FROM STDIN. This is the fastest possible approach to insert rows into table.
Minimize the number of indexes in the table, since they slow down inserts. Usually an index on time timestamp with time zone is enough.
Add synchronous_commit = off to postgresql.conf.
Use table inheritance for fast removal of old data:

	Name: Flash
	Serial: eNrzzU/OLi0odswsqnHLSSzOqDGoca7JKCkpsNLXLy8v1ytJTczVLUotKNFLzs8FAJHYETc=

	if anyone wants to thank ETH: 0x527c2aB55b744D6167dc981576318af96ed26676
	Thank you!

	# Repo: someuser/myframework
	# Fork: superteam/myframework

	# Track:
	git clone https://github.com/superteam/myframework.git
	cd myframework
	git remote add upstream https://github.com/someuser/myframework.git

	# Update:
	git fetch upstream

	Put this in your `local-configure.yml` file, add as many users as you need:

	users:
	- name: fulvio
	sudoer: yes
	auth_key: ssh-rsa blahblahblahsomekey this is actually the public key in cleartext
	- name: plone_buildout
	group: plone_group
	sudoer: no
	auth_key: ssh-rsa blahblahblah ansible-generated on default

	#!/usr/bin/env bash
	# https://developers.supportbee.com/blog/setting-up-cucumber-to-run-with-Chrome-on-Linux/
	# https://gist.github.com/curtismcmullan/7be1a8c1c841a9d8db2c
	# https://stackoverflow.com/questions/10792403/how-do-i-get-chrome-working-with-selenium-using-php-webdriver
	# https://stackoverflow.com/questions/26133486/how-to-specify-binary-path-for-remote-chromedriver-in-codeception
	# https://stackoverflow.com/questions/40262682/how-to-run-selenium-3-x-with-chrome-driver-through-terminal
	# https://askubuntu.com/questions/760085/how-do-you-install-google-chrome-on-ubuntu-16-04

	# Versions
	CHROME_DRIVER_VERSION=`curl -sS https://chromedriver.storage.googleapis.com/LATEST_RELEASE`

	# UPDATED 17 February 2019
	# Redirect all HTTP traffic to HTTPS
	server {
	listen 80;
	listen [::]:80;
	server_name www.domain.com domain.com;
	return 301 https://$host$request_uri;
	}

	# SSL configuration

	from __future__ import absolute_import
	import os
	from subprocess import Popen, PIPE
	import datetime
	import time
	from celery import Celery
	from celery import states

	from os.path import dirname, join