Lawrence Jones lawrencejones

Working on building reliable infrastructure and tooling for GoCardless, a fast-growing fintech based in London.

lawrencejones / manifest.go

Created November 16, 2019 13:53

Example of validated manifest

	package manifest

	import (
	"fmt"

	"github.com/stretchr/objx"
	)

	// Manifest describes a single Kubernetes manifest. Manifests should only ever be
	// constructed using the NewManifest method, to ensure the resource is well-formed.

lawrencejones / config.libsonnet

Last active November 12, 2019 17:25

external-dsn jsonnet module

	{
	_images+:: {
	external_dns: "registry.opensource.zalan.do/teapot/external-dns:v0.5.17",
	},
	_config+:: {
	external_dns: {
	namespace: "external-dns",
	domain_filter: [
	"lawrjone.xyz",
	],

lawrencejones / logger.rb

Created September 6, 2019 10:26

Simple logfmt logger in Ruby

	# frozen_string_literal: true

	require "logger"
	require "values"

	module App
	module Logger
	class ContextualLogger < Value.new(:logger, :context)
	def log(**kwargs)
	logger.info(context.merge(kwargs))

lawrencejones / 11

Last active May 17, 2019 10:46

Stolon sentinel locking up due to etcd

	λ (lab) ~> kl stolon-main-sentinel-backend-stolon-main-sentinel-78d4d597c2lsv -f
	2019-05-16T02:57:57.750Z INFO cmd/sentinel.go:1962 sentinel uid {"uid": "f3e6c1b3"}
	2019-05-16T02:57:57.850Z INFO cmd/sentinel.go:80 Trying to acquire sentinels leadership
	2019-05-16T07:19:41.806Z ERROR cmd/sentinel.go:100 election loop error {"error": "lost watcher waiting for delete"}
	2019-05-16T07:19:51.806Z INFO cmd/sentinel.go:80 Trying to acquire sentinels leadership
	2019-05-16T07:25:43.371Z ERROR cmd/sentinel.go:1815 error retrieving cluster data {"error": "context deadline exceeded"}


	SIGQUIT: quit
	PC=0x45ae01 m=0 sigcode=0

lawrencejones / 01-disable.bash

Last active May 2, 2019 15:23

Upgrade process for PG9.4 -> 11

	#!/usr/bin/env bash

	all-databases() {
	cd /tmp && sudo -u postgres psql -U pgbouncer pgbouncer -c 'show databases;' -p 6432 \| grep -Po '^ gc_\S+'
	}

	disable-databases() {
	xargs -n1 -I _DATABASE_ sudo -u postgres psql -U pgbouncer pgbouncer -p 6432 -c 'disable _DATABASE_;'
	}

lawrencejones / .ruby-version

Last active July 6, 2019 16:09

Associated code for https://lawrencejones.dev/incremental-measurement/

2.6.2

lawrencejones / verify_commit.go

Created March 28, 2019 20:24

Script to verify no data loss with a HA PG cluster

lawrencejones / create-database

Created January 18, 2019 08:45

Create a MySQL replica from external host in GCP

	#!/usr/bin/env bash

	ACCESS_TOKEN="$(gcloud auth print-access-token)"
	PROJECT="gc-prd-effc"

	# Parameters
	REGION="europe-west1" # "europe-west4"
	DATABASE_VERSION="MYSQL_5_6"
	DATABASE_TIER="D2" # "db-n1-standard-2"
	CERTIFICATE_FILE="rds-ca-2015-root.pem"

lawrencejones / output

Last active January 14, 2019 17:15

Example of exporting Route53

	λ (lab) ~> aws route53 list-resource-record-sets --hosted-zone-id Z1B93ASNBC3G25
	{
	"ResourceRecordSets": [
	...,
	{
	"Name": "something.directli.co.uk.",
	"Type": "A",
	"TTL": 300,
	"ResourceRecords": [
	{

lawrencejones / main.go

Created January 9, 2019 16:48

Annotate configmaps with author

	package main

	import (
	"context"
	"net/http"
	"os"

	kitlog "github.com/go-kit/kit/log"
	"github.com/lawrencejones/theatre/pkg/signals"