debian-mirror-gitlab/lib/container_registry/client.rb
2021-06-08 01:23:25 +05:30

253 lines
8 KiB
Ruby

# frozen_string_literal: true
require 'faraday'
require 'faraday_middleware'
require 'digest'
module ContainerRegistry
class Client
include Gitlab::Utils::StrongMemoize
attr_accessor :uri
DOCKER_DISTRIBUTION_MANIFEST_V2_TYPE = 'application/vnd.docker.distribution.manifest.v2+json'
OCI_MANIFEST_V1_TYPE = 'application/vnd.oci.image.manifest.v1+json'
CONTAINER_IMAGE_V1_TYPE = 'application/vnd.docker.container.image.v1+json'
REGISTRY_VERSION_HEADER = 'gitlab-container-registry-version'
REGISTRY_FEATURES_HEADER = 'gitlab-container-registry-features'
REGISTRY_TAG_DELETE_FEATURE = 'tag_delete'
ACCEPTED_TYPES = [DOCKER_DISTRIBUTION_MANIFEST_V2_TYPE, OCI_MANIFEST_V1_TYPE].freeze
# Taken from: FaradayMiddleware::FollowRedirects
REDIRECT_CODES = Set.new [301, 302, 303, 307]
RETRY_EXCEPTIONS = [Faraday::Request::Retry::DEFAULT_EXCEPTIONS, Faraday::ConnectionFailed].flatten.freeze
RETRY_OPTIONS = {
max: 1,
interval: 5,
exceptions: RETRY_EXCEPTIONS
}.freeze
ERROR_CALLBACK_OPTIONS = {
callback: -> (env, exception) do
Gitlab::ErrorTracking.log_exception(
exception,
class: name,
url: env[:url]
)
end
}.freeze
def self.supports_tag_delete?
registry_config = Gitlab.config.registry
return false unless registry_config.enabled && registry_config.api_url.present?
token = Auth::ContainerRegistryAuthenticationService.access_token([], [])
client = new(registry_config.api_url, token: token)
client.supports_tag_delete?
end
def initialize(base_uri, options = {})
@base_uri = base_uri
@options = options
end
def registry_info
response = faraday.get("/v2/")
return {} unless response&.success?
version = response.headers[REGISTRY_VERSION_HEADER]
features = response.headers.fetch(REGISTRY_FEATURES_HEADER, '')
{
version: version,
features: features.split(',').map(&:strip),
vendor: version ? 'gitlab' : 'other'
}
end
def repository_tags(name)
response_body faraday.get("/v2/#{name}/tags/list")
end
def repository_manifest(name, reference)
response_body faraday.get("/v2/#{name}/manifests/#{reference}")
end
def repository_tag_digest(name, reference)
response = faraday.head("/v2/#{name}/manifests/#{reference}")
response.headers['docker-content-digest'] if response.success?
end
def delete_repository_tag_by_digest(name, reference)
delete_if_exists("/v2/#{name}/manifests/#{reference}")
end
def delete_repository_tag_by_name(name, reference)
delete_if_exists("/v2/#{name}/tags/reference/#{reference}")
end
# Check if the registry supports tag deletion. This is only supported by the
# GitLab registry fork. The fastest and safest way to check this is to send
# an OPTIONS request to /v2/<name>/tags/reference/<tag>, using a random
# repository name and tag (the registry won't check if they exist).
# Registries that support tag deletion will reply with a 200 OK and include
# the DELETE method in the Allow header. Others reply with an 404 Not Found.
def supports_tag_delete?
strong_memoize(:supports_tag_delete) do
registry_features = Gitlab::CurrentSettings.container_registry_features || []
next true if ::Gitlab.com? && registry_features.include?(REGISTRY_TAG_DELETE_FEATURE)
response = faraday.run_request(:options, '/v2/name/tags/reference/tag', '', {})
response.success? && response.headers['allow']&.include?('DELETE')
end
end
def upload_raw_blob(path, blob)
digest = "sha256:#{Digest::SHA256.hexdigest(blob)}"
if upload_blob(path, blob, digest).success?
[blob, digest]
end
end
def upload_blob(name, content, digest)
upload = faraday(timeout_enabled: false).post("/v2/#{name}/blobs/uploads/")
return upload unless upload.success?
location = URI(upload.headers['location'])
faraday(timeout_enabled: false).put("#{location.path}?#{location.query}") do |req|
req.params['digest'] = digest
req.headers['Content-Type'] = 'application/octet-stream'
req.body = content
end
end
def generate_empty_manifest(path)
image = {
config: {}
}
image, image_digest = upload_raw_blob(path, Gitlab::Json.pretty_generate(image))
return unless image
{
schemaVersion: 2,
mediaType: DOCKER_DISTRIBUTION_MANIFEST_V2_TYPE,
config: {
mediaType: CONTAINER_IMAGE_V1_TYPE,
size: image.size,
digest: image_digest
}
}
end
def blob(name, digest, type = nil)
type ||= 'application/octet-stream'
response_body faraday_blob.get("/v2/#{name}/blobs/#{digest}", nil, 'Accept' => type), allow_redirect: true
end
def delete_blob(name, digest)
delete_if_exists("/v2/#{name}/blobs/#{digest}")
end
def put_tag(name, reference, manifest)
response = faraday(timeout_enabled: false).put("/v2/#{name}/manifests/#{reference}") do |req|
req.headers['Content-Type'] = DOCKER_DISTRIBUTION_MANIFEST_V2_TYPE
req.body = Gitlab::Json.pretty_generate(manifest)
end
response.headers['docker-content-digest'] if response.success?
end
private
def initialize_connection(conn, options)
conn.request :json
if options[:user] && options[:password]
conn.request(:basic_auth, options[:user].to_s, options[:password].to_s)
elsif options[:token]
conn.request(:authorization, :bearer, options[:token].to_s)
end
yield(conn) if block_given?
conn.request(:retry, RETRY_OPTIONS)
conn.request(:gitlab_error_callback, ERROR_CALLBACK_OPTIONS)
conn.adapter :net_http
end
def accept_manifest(conn)
conn.headers['Accept'] = ACCEPTED_TYPES
conn.response :json, content_type: 'application/json'
conn.response :json, content_type: 'application/vnd.docker.distribution.manifest.v1+prettyjws'
conn.response :json, content_type: 'application/vnd.docker.distribution.manifest.v1+json'
conn.response :json, content_type: DOCKER_DISTRIBUTION_MANIFEST_V2_TYPE
conn.response :json, content_type: OCI_MANIFEST_V1_TYPE
end
def response_body(response, allow_redirect: false)
if allow_redirect && REDIRECT_CODES.include?(response.status)
response = redirect_response(response.headers['location'])
end
response.body if response && response.success?
end
def redirect_response(location)
return unless location
uri = URI(@base_uri).merge(location)
raise ArgumentError, "Invalid scheme for #{location}" unless %w[http https].include?(uri.scheme)
faraday_redirect.get(uri)
end
def faraday(timeout_enabled: true)
@faraday ||= faraday_base(timeout_enabled: timeout_enabled) do |conn|
initialize_connection(conn, @options, &method(:accept_manifest))
end
end
def faraday_blob
@faraday_blob ||= faraday_base do |conn|
initialize_connection(conn, @options)
end
end
# Create a new request to make sure the Authorization header is not inserted
# via the Faraday middleware
def faraday_redirect
@faraday_redirect ||= faraday_base do |conn|
conn.request :json
conn.request(:retry, RETRY_OPTIONS)
conn.request(:gitlab_error_callback, ERROR_CALLBACK_OPTIONS)
conn.adapter :net_http
end
end
def faraday_base(timeout_enabled: true, &block)
request_options = timeout_enabled ? Gitlab::HTTP::DEFAULT_TIMEOUT_OPTIONS : nil
Faraday.new(
@base_uri,
headers: { user_agent: "GitLab/#{Gitlab::VERSION}" },
request: request_options,
&block
)
end
def delete_if_exists(path)
result = faraday.delete(path)
result.success? || result.status == 404
end
end
end
ContainerRegistry::Client.prepend_mod_with('ContainerRegistry::Client')