Created
October 26, 2016 18:10
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prints the Docker Image Labels for ECR images matching a given tag expression
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#!/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 | |
region = 'us-east-1' | |
# get all images for repo (<= 100) | |
ecr = Aws::ECR::Client.new(region: region) | |
STDERR.printf "Fetching all images from Repo %s in %s...\n", repo, region | |
all_imgs = ecr.describe_images(repository_name: repo).image_details | |
# filter images by tag_match | |
img_info = all_imgs.select{|i| !(i.image_tags.select {|t| t =~ tag_match}).empty?} | |
# get image details with another API call | |
STDERR.printf "Fetching image details for %d matching images...\n", img_info.count | |
details = ecr.batch_get_image( | |
repository_name: repo, | |
image_ids: img_info.map{|i| { image_digest: i.image_digest}}).images | |
# extract Docker Labels, excluding label_filter, and parsing DateTime fields | |
STDERR.printf "Extracting image manifests...\n" | |
manifests = details.map{|d| JSON.parse(JSON.parse( | |
d.image_manifest)['history'].first['v1Compatibility'])} | |
labels = manifests.map{|m| m['config']['Labels'].select{|k,v| k !~ label_filter}} | |
# sort as needed | |
if (! sort_field.empty?) && (labels.first.has_key?(sort_field)) | |
labels.sort! do |a,b| | |
if a =~ date_fields | |
DateTime.parse(a[sort_field]) <=> DateTime.parse(b[sort_field]) | |
else | |
a[sort_field] <=> b[sort_field] | |
end | |
end | |
end | |
labels.reverse! if reverse_sort | |
puts JSON.pretty_generate(labels) # output |
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