Benton Roberts benton

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How to Build Like Medistrano

By simulating Medistrano's Docker image build process on your own workstation, you get immediate feedback, plus use of the local Docker cache. This can help catch or reproduce problems much more quickly than by repeatedly committing changes to GitHub, then asking Medistrano to perform a build. Here are some instructions that should help you accomplish that.

Prerequisites

Before runnig docker build in your app's checkout directorty, you should make sure you can authenticate to any hosts that might require access during the build process.

	#!/usr/bin/env ruby
	# prints the Docker Image Labels for ECR images matching a given tag expression
	require 'aws-sdk'

	repo = 'mdsol/operationalanalytics/build'
	tag_match = /feature-sprint3\.maps/
	sort_field = 'com.mdsol.12f-buildDate'
	reverse_sort = true # reverse is nicer when date sorting
	label_filter = /\Acom\.mdsol\.12f-appDesc/ # values in these labels are ignored
	date_fields = /\Acom\.mdsol\.12f-.*Date\Z/ # these values get DateTime parsed

	(defn make-pairs
	"Creates a vector of pairs from the incoming sequence. Ignores extra elements."
	([] []) ; return an empty vector if supplied no arguments
	([seq] (make-pairs seq [])); return a vector of pairs taken from seq
	([seq pairs] ; return a vector of pairs, starting with some existing pairs
	(if (< (count seq) 2) pairs
	(make-pairs (rest (rest seq))
	(conj (vec pairs) [(first seq) (second seq)])))))

	(defn map-pairs

	require 'aws-sdk-resources'
	require 'diskcached'

	# ...

	CANONICAL_AWS_ID = '099720109477' # AWS ID for Ubuntu's publisher
	DATE_MATCHER = /(\d\d\d\d)(\d\d)(\d\d)(\.\d+)?\Z/

	# Returns the latest Canonical Ubuntu AMI for a given
	# Ubuntu version, AWS region, architecture, and root device type.

	[462/606] Compiling src/gctools/boehmGarbageCollection.cc
	[463/606] Compiling src/gctools/gc_interface.cc
	In file included from ../../src/gctools/gc_interface.cc:201:
	../../src/main/clasp_gc_cando.cc:9658:92: error: no member named '_BformatStringOutputStream' in 'GCRoots'
	{ fixed_field, SMART_PTR_OFFSET, sizeof(gctools::smart_ptr<core::StringOutputStream_O>), offsetof(SAFE_TYPE_MACRO(core::Lisp_O),_Roots._BformatStringOutputStream), "_Roots._BformatStringOutputStream" }, // public: (T T) fixable: SMART-PTR-FIX good-name: T
	^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~
	/home/app/externals-clasp/build/release/bin/../lib/clang/4.0.0/include/stddef.h:120:24: note: expanded from macro 'offsetof'
	#define offsetof(t, d) __builtin_offsetof(t, d)
	^ ~
	In file included from ../../src/gctools/gc_interface.cc:201:

	FROM ubuntu:latest
	RUN apt-get update && apt-get -y upgrade && apt-get install -y curl
	RUN echo 'deb http://apt.llvm.org/xenial/ llvm-toolchain-xenial-4.0 main' \
	>/etc/apt/sources.list.d/llvm.list
	RUN echo 'deb-src http://apt.llvm.org/xenial/ llvm-toolchain-xenial-4.0 main' \
	>>/etc/apt/sources.list.d/llvm.list
	RUN curl http://apt.llvm.org/llvm-snapshot.gpg.key \| apt-key add -
	RUN apt-get update && apt-get -y install clang-4.0

	#!/usr/bin/env bash
	# pings an IP address forever and tracks whether it is accessible
	# logs the connection's state change to $STDOUT

	ip='8.8.8.8'
	track_attempts=5
	failure_threshold=3
	delay=1

	# track state

	#!/usr/bin/env boot
	; Converts track-imcp-state.sh output into minute-by-minute CSV datapoints
	; Requirements: Java 8 and Boot
	; Use "brew install boot-clj", or see https://github.com/boot-clj/boot
	; Best used with only one day's worth of logs at a time from STDIN, like this:
	; cat [output.log] \| grep [DATE] \| ./process-track-ip-state.clj > [DATE].csv

	(set-env! :dependencies '[[clj-time "0.14.0"]])
	(require '[clj-time.core :as t])
	(require '[clj-time.format :as f])