progrium

#!/bin/bash

CONSUL="localhost:8500"

main() {
	case "$1" in
		info)
			curl -s "$CONSUL/v1/kv/$2" | jq -r .[]
			;;
		get)

progrium

{
  "ssl_certificate": {"$file": "/nginx/files/foobar"},
  "user": ["nobody", "nogroup"],
  "events": {
    "worker_connections": 1024,
    "accept_mutex": "on"
  },
  "http": {
    "gzip_disable": "\"MSIE [1-6]\\.\"",
    "upstream": {

progrium

#!/bin/bash

foo() {
  echo "foo: exported from file1"
}

locals() {
  bar() {
    echo "bar: local to file1"
  }

progrium

-----> Python app detected
-----> Preparing Python runtime (python-2.7.7)
Traceback (most recent call last):
  File "/tmp/buildpacks/heroku-buildpack-python/vendor/bpwatch/bpwatch", line 13, in <module>
    import bp_cli
  File "/tmp/buildpacks/heroku-buildpack-python/vendor/bpwatch/bpwatch.zip/bp_cli.py", line 26, in <module>
  File "/tmp/buildpacks/heroku-buildpack-python/vendor/bpwatch/bpwatch.zip/logplex/__init__.py", line 1, in <module>
  File "/tmp/buildpacks/heroku-buildpack-python/vendor/bpwatch/bpwatch.zip/logplex/core.py", line 8, in <module>
  File "/tmp/buildpacks/heroku-buildpack-python/vendor/bpwatch/bpwatch.zip/logplex/packages/requests/__init__.py", line 58, in <module>
  File "/tmp/buildpacks/heroku-buildpack-python/vendor/bpwatch/bpwatch.zip/logplex/packages/requests/utils.py", line 12, in <module>

progrium

destructuring_assignment_for_named_local_args() {
  declare numbers letters words
  read numbers letters words <<<"$@"
  
  echo "$numbers"
  echo "$letters"
  echo "$words"
}

destructuring_assignment_for_named_local_args 123 abc "Hello world"

progrium

FROM ubuntu:trusty
MAINTAINER Jeff Lindsay <progrium@gmail.com>

RUN apt-get -y install unzip
ADD https://dl.bintray.com/mitchellh/consul/0.2.0_linux_amd64.zip /tmp/consul.zip
RUN cd /usr/local/sbin && unzip /tmp/consul.zip && chmod +x /usr/local/sbin/consul

EXPOSE 8300 8301 8302 

ENTRYPOINT ["/usr/local/sbin/consul", "agent", "-server", "-data-dir=/tmp/consul"]

progrium

package main

import (
	"bufio"
	"crypto/sha1"
	"crypto/tls"
	"encoding/base64"
	"encoding/hex"
	"io"
	"io/ioutil"

progrium

Discoverd Leader Election API

Notes:

• cannot be used for multiple leaders/quorum
• races between leader updates in servers/clients should be handled by message queuing and/or retry

Server Patterns

Many uncoordinated active servers (no leaders)

progrium

// many servers, one master, many clients

// server
set, err := discoverd.Register("db", 9099)
<-set.BecomeLeader()

// client
set, err := discoverd.ServiceSet("db")
leader := <-set.NewLeader()

progrium

#!/bin/bash
#
# Usage:
#   $ echo "host1 host2 host3" | ./sshmany uname -a
#   $ cat myservers | ./sshmany echo Hello world
#
cmd="$@"
servers="$(cat)"
i=37
for server in $servers; do