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lawrencejones / main.jsonnet
Created February 11, 2020 20:54
Custom jsonnet library for ES cluster
local k = import 'vendor/k8s.libsonnet';
k {
_config+:: {
name: 'name',
namespace: 'namespace',
node_storage: '5Gi',
labels: { app: 'elastic-cloud' },
version: '7.5.2',
master_replicas: 3,
@lawrencejones
lawrencejones / gocardless-headers.md
Created February 6, 2020 17:59
GoCardless response header changes, from 14th February onward

(a) Request without downcasing opt-in

This is what we'll be serving until February 14th, after which we'll switch to the downcased version by default.

$ curl -v --http1.1 \
    -H "authorization: Bearer $TOKEN" \
    -H 'gocardless-version: 2015-07-06' \
    -H 'content-type: application/json' \
@lawrencejones
lawrencejones / formats.md
Last active January 10, 2020 09:06
Comparison of Postgres logs

Formats

log_min_duration_statement=0, log_statement=none

2020-01-10 09:01:07.456 UTC [9359] LOG:  duration: 0.127 ms  parse <unnamed>: select pg_sleep($1)
2020-01-10 09:01:07.457 UTC [9359] LOG:  duration: 0.078 ms  bind <unnamed>: select pg_sleep($1)
2020-01-10 09:01:07.457 UTC [9359] DETAIL:  parameters: $1 = '2'

2020-01-10 09:01:09.461 UTC [9359] LOG:  duration: 2004.025 ms  execute <unnamed>: select pg_sleep($1)
@lawrencejones
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
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
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
lawrencejones / .ruby-version
Last active July 6, 2019 16:09
Associated code for https://lawrencejones.dev/incremental-measurement/
2.6.2
@lawrencejones
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
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
lawrencejones / verify_commit.go
Created March 28, 2019 20:24
Script to verify no data loss with a HA PG cluster
package main
import (
"context"
"fmt"
"os"
"os/signal"
"sync"
"sync/atomic"
"syscall"