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When supplying a docker image that contains a registry with a port number, such as `localhost:5000/chef/inspec:1.46.3`, the docker_image resource was unable to locate the image in question due to incorrect parsing of the repository and tag. Signed-off-by: Adam Leff <adam@leff.co>
124 lines
3.7 KiB
Ruby
124 lines
3.7 KiB
Ruby
# encoding: utf-8
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#
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# Copyright 2017, Christoph Hartmann
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#
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# author: Christoph Hartmann
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# author: Patrick Muench
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# author: Dominik Richter
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module Inspec::Resources
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class DockerImage < Inspec.resource(1)
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name 'docker_image'
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desc ''
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example "
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describe docker_image('alpine:latest') do
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it { should exist }
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its('id') { should_not eq '' }
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its('image') { should eq 'alpine:latest' }
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its('repo') { should eq 'alpine' }
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its('tag') { should eq 'latest' }
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end
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describe docker_image('alpine:latest') do
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it { should exist }
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end
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describe docker_image(id: '4a415e366388') do
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it { should exist }
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end
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"
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def initialize(opts = {})
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# do sanitizion of input values
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o = opts.dup
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o = { image: opts } if opts.is_a?(String)
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@opts = sanitize_options(o)
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end
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def exist?
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image_info.exists?
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end
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def id
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image_info.ids[0] if image_info.entries.size == 1
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end
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def image
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"#{repo}:#{tag}" if image_info.entries.size == 1
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end
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def repo
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image_info.repositories[0] if image_info.entries.size == 1
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end
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def tag
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image_info.tags[0] if image_info.entries.size == 1
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end
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def to_s
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img = @opts[:image] || @opts[:id]
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"Docker Image #{img}"
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end
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private
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def sanitize_options(opts)
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opts.merge!(parse_components_from_image(opts[:image]))
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# assume a "latest" tag if we don't have one
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opts[:tag] ||= 'latest'
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# if the ID isn't nil and doesn't contain a hash indicator (indicated by the presence
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# of a colon, which separates the indicator from the actual hash), we assume it's sha256.
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opts[:id] = 'sha256:' + opts[:id] unless opts[:id].nil? || opts[:id].include?(':')
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# Assemble/reassemble the image from the repo and tag
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opts[:image] = "#{opts[:repo]}:#{opts[:tag]}" unless opts[:repo].nil?
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# return the santized opts back to the caller
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opts
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end
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def image_info
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return @info if defined?(@info)
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opts = @opts
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@info = inspec.docker.images.where {
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(repository == opts[:repo] && tag == opts[:tag]) || (!id.nil? && !opts[:id].nil? && (id == opts[:id] || id.start_with?(opts[:id])))
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}
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end
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def parse_components_from_image(image_string)
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# if the user did not supply an image string, they likely supplied individual
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# option parameters, such as repo and tag. Return empty data back to the caller.
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return {} if image_string.nil?
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first_colon = image_string.index(':') || -1
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first_slash = image_string.index('/') || -1
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if image_string.count(':') == 2
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# If there are two colons in the image string, it contains a repo-with-port and a tag.
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# example: localhost:5000/chef/inspec:1.46.3
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partitioned_string = image_string.rpartition(':')
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repo = partitioned_string.first
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tag = partitioned_string.last
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elsif image_string.count(':') == 1 && first_colon < first_slash
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# If there's one colon in the image string, and it comes before a forward-slash,
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# it contains a repo-with-port but no tag.
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# example: localhost:5000/ubuntu
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repo = image_string
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tag = nil
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else
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# If there's one colon in the image string and it doesn't preceed a slash, or if
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# there is no colon at all, then it separates the repo from the tag, if there is a tag.
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# example: chef/inspec:1.46.3
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# example: chef/inspec
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# example: ubuntu:14.04
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repo, tag = image_string.split(':')
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end
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# return the repo and tag parsed from the string, which can be merged into
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# the rest of the user-supplied options
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{ repo: repo, tag: tag }
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end
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end
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end
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