Class: DockerTools::Image

Inherits:
Object
  • Object
show all
Defined in:
lib/docker_tools/image.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name, registry, tag, dir = nil, lookup = true) ⇒ Image

Returns a new instance of Image.



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# File 'lib/docker_tools/image.rb', line 11

def initialize(name, registry, tag, dir=nil, lookup=true)
  @name = name
  @registry = registry
  @tag = tag
  @full_name = "#{registry}/#{name}:#{tag}" unless registry.nil?
  @full_name = "#{name}:#{tag}" if registry.nil?
  @image_name = "#{registry}/#{name}" unless registry.nil?
  @image_name = name if registry.nil?
  @dir = dir
  @dockerfile = "#{dir}/Dockerfile.template" unless dir.nil?
  @image = lookup_image if lookup
  # Set the read timeout for the connection
  Excon.defaults[:read_timeout] = DockerTools.image_timeout
end

Instance Attribute Details

#dir ⇒ Object

Returns the value of attribute dir.



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# File 'lib/docker_tools/image.rb', line 8

def dir
  @dir
end

#full_name ⇒ Object

Returns the value of attribute full_name.



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# File 'lib/docker_tools/image.rb', line 8

def full_name
  @full_name
end

#image ⇒ Object

Returns the value of attribute image.



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# File 'lib/docker_tools/image.rb', line 8

def image
  @image
end

#name ⇒ Object

Returns the value of attribute name.



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# File 'lib/docker_tools/image.rb', line 8

def name
  @name
end

#registry ⇒ Object

Returns the value of attribute registry.



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# File 'lib/docker_tools/image.rb', line 8

def registry
  @registry
end

#tag(new_tag) ⇒ Object

Returns the value of attribute tag.



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# File 'lib/docker_tools/image.rb', line 8

def tag
  @tag
end

Instance Method Details

#build(registry: @registry, tag: @tag, method: 'image', distro: 'precise', fallback_tag: DockerTools.dependency_fallback_tag, no_pull: DockerTools.no_pull, template_vars: {}, rm: false, no_cache: false) ⇒ Object 



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# File 'lib/docker_tools/image.rb', line 32

def build(registry: @registry, tag: @tag, method: 'image', distro: 'precise', fallback_tag: DockerTools.dependency_fallback_tag, no_pull: DockerTools.no_pull, template_vars: {}, rm: false, no_cache: false)
  case method
  when 'image'
    dependency_tag = dependency['tag']
    dependency_tag = DockerTools::Dependency.new(dependency['repository'], dependency['registry'], dependency['tag'], fallback_tag).run unless no_pull

    dockerfile_path = "#{@dir}/Dockerfile"
    dockerfile_contents = dockerfile(@name, registry, dependency_tag, template_vars)
    File.open(dockerfile_path, 'w') { | file | file.write(dockerfile_contents) }
    @image = Docker::Image.build_from_dir(@dir, { 'rm' => rm, 'nocache' => no_cache }) do | chunk | 
      DockerTools::Util.parse_output(chunk) do | output |
        if output.kind_of?(Hash)
          if output.has_key?('error')
            puts output['error']
            raise output['error']
          end
          puts output['stream'] if output.has_key?('stream')
        else
          puts output
        end
      end
    end
    File.delete(dockerfile_path)
  when 'debootstrap'
    debootstrap = DockerTools::Debootstrap.new(@name, distro)
    debootstrap.run
    @image = Docker::Image.import(debootstrap.archive)
    debootstrap.cleanup
  else
    raise "Invalid value for method: #{method}"
  end
  @image.tag('repo' => "#{@registry}/#{@name}", 'tag' => @tag, 'force' => true)
  @image
end

#dependency ⇒ Object 



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# File 'lib/docker_tools/image.rb', line 71

def dependency
  if @dockerfile.nil?
    return nil
  else
    template = dockerfile
    dependency = {}
    if template =~ /(FROM|from)\s+(\S+)\/(\S+):(\S+)/
      dependency['registry'] = $2
      dependency['repository'] = $3
      dependency['tag'] = $4
      return dependency
    elsif template =~ /(FROM|from)\s+(\S+):(\S+)/
      dependency['registry'] = nil
      dependency['repository'] = $2
      dependency['tag'] = $3
    elsif template =~ /(FROM|from)\s+(\S+)$/
      dependency['registry'] = nil
      dependency['repository'] = $2
      dependency['tag'] = nil
    end
    dependency
  end
end

#pull ⇒ Object 



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# File 'lib/docker_tools/image.rb', line 26

def pull
  puts "Pulling image #{@image_name}"
  Docker::Image.create('fromImage' => @image_name, 'tag' => @tag)
  @image = lookup_image
end