debian-mirror-gitlab/app/services/projects/update_pages_service.rb
2021-09-30 23:02:18 +05:30

268 lines
7.8 KiB
Ruby

# frozen_string_literal: true
module Projects
class UpdatePagesService < BaseService
InvalidStateError = Class.new(StandardError)
FailedToExtractError = Class.new(StandardError)
ExclusiveLeaseTaken = Class.new(StandardError)
include ::Pages::LegacyStorageLease
BLOCK_SIZE = 32.kilobytes
PUBLIC_DIR = 'public'
# this has to be invalid group name,
# as it shares the namespace with groups
TMP_EXTRACT_PATH = '@pages.tmp'
# old deployment can be cached by pages daemon
# so we need to give pages daemon some time update cache
# 10 minutes is enough, but 30 feels safer
OLD_DEPLOYMENTS_DESTRUCTION_DELAY = 30.minutes.freeze
attr_reader :build
def initialize(project, build)
@project = project
@build = build
end
def execute
register_attempt
# Create status notifying the deployment of pages
@status = build_commit_status
::Ci::Pipelines::AddJobService.new(@build.pipeline).execute!(@status) do |job|
job.enqueue!
job.run!
end
raise InvalidStateError, 'missing pages artifacts' unless build.artifacts?
raise InvalidStateError, 'build SHA is outdated for this ref' unless latest?
build.artifacts_file.use_file do |artifacts_path|
deploy_to_legacy_storage(artifacts_path)
create_pages_deployment(artifacts_path, build)
success
end
rescue InvalidStateError => e
error(e.message)
rescue StandardError => e
error(e.message)
raise e
end
private
def success
@status.success
@project.mark_pages_as_deployed(artifacts_archive: build.job_artifacts_archive)
super
end
def error(message)
register_failure
log_error("Projects::UpdatePagesService: #{message}")
@status.allow_failure = !latest?
@status.description = message
@status.drop(:script_failure)
super
end
def build_commit_status
GenericCommitStatus.new(
user: build.user,
stage: 'deploy',
name: 'pages:deploy'
)
end
def deploy_to_legacy_storage(artifacts_path)
# path today used by one project can later be used by another
# so we can't really scope this feature flag by project or group
return unless ::Settings.pages.local_store.enabled
return if Feature.enabled?(:skip_pages_deploy_to_legacy_storage, project, default_enabled: :yaml)
# Create temporary directory in which we will extract the artifacts
make_secure_tmp_dir(tmp_path) do |tmp_path|
extract_archive!(artifacts_path, tmp_path)
# Check if we did extract public directory
archive_public_path = File.join(tmp_path, PUBLIC_DIR)
raise InvalidStateError, 'pages miss the public folder' unless Dir.exist?(archive_public_path)
raise InvalidStateError, 'build SHA is outdated for this ref' unless latest?
deploy_page!(archive_public_path)
end
end
def extract_archive!(artifacts_path, temp_path)
if artifacts.ends_with?('.zip')
extract_zip_archive!(artifacts_path, temp_path)
else
raise InvalidStateError, 'unsupported artifacts format'
end
end
def extract_zip_archive!(artifacts_path, temp_path)
raise InvalidStateError, 'missing artifacts metadata' unless build.artifacts_metadata?
# Calculate page size after extract
public_entry = build.artifacts_metadata_entry(PUBLIC_DIR + '/', recursive: true)
if public_entry.total_size > max_size
raise InvalidStateError, "artifacts for pages are too large: #{public_entry.total_size}"
end
SafeZip::Extract.new(artifacts_path)
.extract(directories: [PUBLIC_DIR], to: temp_path)
rescue SafeZip::Extract::Error => e
raise FailedToExtractError, e.message
end
def deploy_page!(archive_public_path)
deployed = try_obtain_lease do
deploy_page_unsafe!(archive_public_path)
true
end
unless deployed
raise ExclusiveLeaseTaken, "Failed to deploy pages - other deployment is in progress"
end
end
def deploy_page_unsafe!(archive_public_path)
# Do atomic move of pages
# Move and removal may not be atomic, but they are significantly faster then extracting and removal
# 1. We move deployed public to previous public path (file removal is slow)
# 2. We move temporary public to be deployed public
# 3. We remove previous public path
FileUtils.mkdir_p(pages_path)
begin
FileUtils.move(public_path, previous_public_path)
rescue StandardError
end
FileUtils.move(archive_public_path, public_path)
ensure
FileUtils.rm_r(previous_public_path, force: true)
end
def create_pages_deployment(artifacts_path, build)
# we're using the full archive and pages daemon needs to read it
# so we want the total count from entries, not only "public/" directory
# because it better approximates work we need to do before we can serve the site
entries_count = build.artifacts_metadata_entry("", recursive: true).entries.count
sha256 = build.job_artifacts_archive.file_sha256
deployment = nil
File.open(artifacts_path) do |file|
deployment = project.pages_deployments.create!(file: file,
file_count: entries_count,
file_sha256: sha256)
raise InvalidStateError, 'build SHA is outdated for this ref' unless latest?
project.update_pages_deployment!(deployment)
end
DestroyPagesDeploymentsWorker.perform_in(
OLD_DEPLOYMENTS_DESTRUCTION_DELAY,
project.id,
deployment.id
)
end
def latest?
# check if sha for the ref is still the most recent one
# this helps in case when multiple deployments happens
sha == latest_sha
end
def blocks
# Calculate dd parameters: we limit the size of pages
1 + max_size / BLOCK_SIZE
end
def max_size_from_settings
Gitlab::CurrentSettings.max_pages_size.megabytes
end
def max_size
max_pages_size = max_size_from_settings
return ::Gitlab::Pages::MAX_SIZE if max_pages_size == 0
max_pages_size
end
def tmp_path
@tmp_path ||= File.join(::Settings.pages.path, TMP_EXTRACT_PATH)
end
def pages_path
@pages_path ||= project.pages_path
end
def public_path
@public_path ||= File.join(pages_path, PUBLIC_DIR)
end
def previous_public_path
@previous_public_path ||= File.join(pages_path, "#{PUBLIC_DIR}.#{SecureRandom.hex}")
end
def ref
build.ref
end
def artifacts
build.artifacts_file.path
end
def latest_sha
project.commit(build.ref).try(:sha).to_s
ensure
# Close any file descriptors that were opened and free libgit2 buffers
project.cleanup
end
def sha
build.sha
end
def register_attempt
pages_deployments_total_counter.increment
end
def register_failure
pages_deployments_failed_total_counter.increment
end
def pages_deployments_total_counter
@pages_deployments_total_counter ||= Gitlab::Metrics.counter(:pages_deployments_total, "Counter of GitLab Pages deployments triggered")
end
def pages_deployments_failed_total_counter
@pages_deployments_failed_total_counter ||= Gitlab::Metrics.counter(:pages_deployments_failed_total, "Counter of GitLab Pages deployments which failed")
end
def make_secure_tmp_dir(tmp_path)
FileUtils.mkdir_p(tmp_path)
path = Dir.mktmpdir(tmp_dir_prefix, tmp_path)
begin
yield(path)
ensure
FileUtils.remove_entry_secure(path)
end
end
def tmp_dir_prefix
"project-#{project.id}-build-#{build.id}-"
end
end
end
Projects::UpdatePagesService.prepend_mod_with('Projects::UpdatePagesService')