debian-mirror-gitlab/lib/gitlab/ci/trace.rb

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# frozen_string_literal: true
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module Gitlab
module Ci
class Trace
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include ::Gitlab::ExclusiveLeaseHelpers
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include ::Gitlab::Utils::StrongMemoize
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include Checksummable
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LOCK_TTL = 10.minutes
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LOCK_RETRIES = 2
LOCK_SLEEP = 0.001.seconds
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WATCH_FLAG_TTL = 10.seconds
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UPDATE_FREQUENCY_DEFAULT = 60.seconds
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UPDATE_FREQUENCY_WHEN_BEING_WATCHED = 3.seconds
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LOAD_BALANCING_STICKING_NAMESPACE = 'ci/build/trace'
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ArchiveError = Class.new(StandardError)
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AlreadyArchivedError = Class.new(StandardError)
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LockedError = Class.new(StandardError)
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attr_reader :job
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delegate :can_attempt_archival_now?, :increment_archival_attempts!,
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:archival_attempts_message, :archival_attempts_available?, to: :trace_metadata
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def initialize(job)
@job = job
end
def html(last_lines: nil)
read do |stream|
stream.html(last_lines: last_lines)
end
end
def raw(last_lines: nil)
read do |stream|
stream.raw(last_lines: last_lines)
end
end
def extract_coverage(regex)
read do |stream|
stream.extract_coverage(regex)
end
end
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def extract_sections
read do |stream|
stream.extract_sections
end
end
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def set(data)
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write('w+b') do |stream|
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data = job.hide_secrets(data)
stream.set(data)
end
end
def append(data, offset)
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write('a+b') do |stream|
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current_length = stream.size
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break current_length unless current_length == offset
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data = job.hide_secrets(data)
stream.append(data, offset)
stream.size
end
end
def exist?
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archived? || live?
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end
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def archived?
trace_artifact&.stored?
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end
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def live?
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job.trace_chunks.any? || current_path.present?
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end
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def read(&block)
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read_stream(&block)
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rescue Errno::ENOENT, ChunkedIO::FailedToGetChunkError
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job.reset
read_stream(&block)
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end
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def write(mode, &blk)
in_write_lock do
unsafe_write!(mode, &blk)
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end
end
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def erase_trace_chunks!
job.trace_chunks.fast_destroy_all # Destroy chunks of a live trace
end
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def erase!
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##
# Erase the archived trace
trace_artifact&.destroy!
##
# Erase the live trace
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erase_trace_chunks!
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FileUtils.rm_f(current_path) if current_path # Remove a trace file of a live trace
ensure
@current_path = nil
end
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def archive!
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in_write_lock do
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unsafe_archive!
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end
end
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def attempt_archive_cleanup!
destroy_any_orphan_trace_data!
end
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def update_interval
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if being_watched?
UPDATE_FREQUENCY_WHEN_BEING_WATCHED
else
UPDATE_FREQUENCY_DEFAULT
end
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end
def being_watched!
Gitlab::Redis::SharedState.with do |redis|
redis.set(being_watched_cache_key, true, ex: WATCH_FLAG_TTL)
end
end
def being_watched?
Gitlab::Redis::SharedState.with do |redis|
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redis.exists?(being_watched_cache_key) # rubocop:disable CodeReuse/ActiveRecord
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end
end
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def lock(&block)
in_write_lock(&block)
rescue FailedToObtainLockError
raise LockedError, "build trace `#{job.id}` is locked"
end
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private
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def read_stream
stream = Gitlab::Ci::Trace::Stream.new do
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if archived?
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trace_artifact.open
elsif job.trace_chunks.any?
Gitlab::Ci::Trace::ChunkedIO.new(job)
elsif current_path
File.open(current_path, "rb")
end
end
yield stream
ensure
stream&.close
end
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def unsafe_write!(mode, &blk)
stream = Gitlab::Ci::Trace::Stream.new do
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if archived?
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raise AlreadyArchivedError, 'Could not write to the archived trace'
elsif current_path
File.open(current_path, mode)
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elsif Feature.enabled?(:ci_enable_live_trace, job.project)
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Gitlab::Ci::Trace::ChunkedIO.new(job)
else
File.open(ensure_path, mode)
end
end
yield(stream).tap do
job.touch if job.needs_touch?
end
ensure
stream&.close
end
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def unsafe_archive!
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raise ArchiveError, 'Job is not finished yet' unless job.complete?
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archived?.tap do |archived|
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destroy_any_orphan_trace_data!
raise AlreadyArchivedError, 'Could not archive again' if archived
end
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if job.trace_chunks.any?
Gitlab::Ci::Trace::ChunkedIO.new(job) do |stream|
archive_stream!(stream)
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destroy_stream(job) { stream.destroy! }
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end
elsif current_path
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File.open(current_path) do |stream|
archive_stream!(stream)
FileUtils.rm(current_path)
end
end
end
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def destroy_any_orphan_trace_data!
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return unless trace_artifact
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if archived?
# An archive file exists, so remove the trace chunks
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erase_trace_chunks!
else
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# A trace artifact record exists with no archive file
# but an archive was attempted, so cleanup the associated record
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trace_artifact.destroy!
end
end
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def in_write_lock(&blk)
lock_key = "trace:write:lock:#{job.id}"
in_lock(lock_key, ttl: LOCK_TTL, retries: LOCK_RETRIES, sleep_sec: LOCK_SLEEP, &blk)
end
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def archive_stream!(stream)
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::Gitlab::Ci::Trace::Archive.new(job, trace_metadata).execute!(stream)
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end
def trace_metadata
strong_memoize(:trace_metadata) do
job.ensure_trace_metadata!
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end
end
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def ensure_path
return current_path if current_path
ensure_directory
default_path
end
def ensure_directory
unless Dir.exist?(default_directory)
FileUtils.mkdir_p(default_directory)
end
end
def current_path
@current_path ||= paths.find do |trace_path|
File.exist?(trace_path)
end
end
def paths
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[default_path]
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end
def default_directory
File.join(
Settings.gitlab_ci.builds_path,
job.created_at.utc.strftime("%Y_%m"),
job.project_id.to_s
)
end
def default_path
File.join(default_directory, "#{job.id}.log")
end
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def trace_artifact
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read_trace_artifact(job) { job.job_artifacts_trace }
end
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def destroy_stream(build)
if consistent_archived_trace?(build)
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::Ci::Build
.sticking
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.stick(LOAD_BALANCING_STICKING_NAMESPACE, build.id)
end
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yield
end
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def read_trace_artifact(build)
if consistent_archived_trace?(build)
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::Ci::Build
.sticking
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.unstick_or_continue_sticking(LOAD_BALANCING_STICKING_NAMESPACE, build.id)
end
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yield
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end
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def consistent_archived_trace?(build)
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::Feature.enabled?(:gitlab_ci_archived_trace_consistent_reads, build.project)
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end
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def being_watched_cache_key
"gitlab:ci:trace:#{job.id}:watched"
end
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end
end
end