gitlab-org--gitlab-foss/db/fixtures/development/14_pipelines.rb
Yorick Peterse 88e627cf14
Fix race conditions for AuthorizedProjectsWorker
There were two cases that could be problematic:

1. Because sometimes AuthorizedProjectsWorker would be scheduled in a
   transaction it was possible for a job to run/complete before a
   COMMIT; resulting in it either producing an error, or producing no
   new data.

2. When scheduling jobs the code would not wait until completion. This
   could lead to a user creating a project and then immediately trying
   to push to it. Usually this will work fine, but given enough load it
   might take a few seconds before a user has access.

The first one is problematic, the second one is mostly just annoying
(but annoying enough to warrant a solution).

This commit changes two things to deal with this:

1. Sidekiq scheduling now takes places after a COMMIT, this is ensured
   by scheduling using Rails' after_commit hook instead of doing so in
   an arbitrary method.

2. When scheduling jobs the calling thread now waits for all jobs to
   complete.

Solution 2 requires tracking of job completions. Sidekiq provides a way
to find a job by its ID, but this involves scanning over the entire
queue; something that is very in-efficient for large queues. As such a
more efficient solution is necessary. There are two main Gems that can
do this in a more efficient manner:

* sidekiq-status
* sidekiq_status

No, this is not a joke. Both Gems do a similar thing (but slightly
different), and the only difference in their name is a dash vs an
underscore. Both Gems however provide far more than just checking if a
job has been completed, and both have their problems. sidekiq-status
does not appear to be actively maintained, with the last release being
in 2015. It also has some issues during testing as API calls are not
stubbed in any way. sidekiq_status on the other hand does not appear to
be very popular, and introduces a similar amount of code.

Because of this I opted to write a simple home grown solution. After
all, all we need is storing a job ID somewhere so we can efficiently
look it up; we don't need extra web UIs (as provided by sidekiq-status)
or complex APIs to update progress, etc.

This is where Gitlab::SidekiqStatus comes in handy. This namespace
contains some code used for tracking, removing, and looking up job IDs;
all without having to scan over an entire queue. Data is removed
explicitly, but also expires automatically just in case.

Using this API we can now schedule jobs in a fork-join like manner: we
schedule the jobs in Sidekiq, process them in parallel, then wait for
completion. By using Sidekiq we can leverage all the benefits such as
being able to scale across multiple cores and hosts, retrying failed
jobs, etc.

The one downside is that we need to make sure we can deal with
unexpected increases in job processing timings. To deal with this the
class Gitlab::JobWaiter (used for waiting for jobs to complete) will
only wait a number of seconds (30 by default). Once this timeout is
reached it will simply return.

For GitLab.com almost all AuthorizedProjectWorker jobs complete in
seconds, only very rarely do we spike to job timings of around a minute.
These in turn seem to be the result of external factors (e.g. deploys),
in which case a user is most likely not able to use the system anyway.

In short, this new solution should ensure that jobs are processed
properly and that in almost all cases a user has access to their
resources whenever they need to have access.
2017-01-25 13:22:15 +01:00

185 lines
5.8 KiB
Ruby

require './spec/support/sidekiq'
class Gitlab::Seeder::Pipelines
STAGES = %w[build test deploy notify]
BUILDS = [
# build stage
{ name: 'build:linux', stage: 'build', status: :success,
queued_at: 10.hour.ago, started_at: 9.hour.ago, finished_at: 8.hour.ago },
{ name: 'build:osx', stage: 'build', status: :success,
queued_at: 10.hour.ago, started_at: 10.hour.ago, finished_at: 9.hour.ago },
# test stage
{ name: 'rspec:linux 0 3', stage: 'test', status: :success,
queued_at: 8.hour.ago, started_at: 8.hour.ago, finished_at: 7.hour.ago },
{ name: 'rspec:linux 1 3', stage: 'test', status: :success,
queued_at: 8.hour.ago, started_at: 8.hour.ago, finished_at: 7.hour.ago },
{ name: 'rspec:linux 2 3', stage: 'test', status: :success,
queued_at: 8.hour.ago, started_at: 8.hour.ago, finished_at: 7.hour.ago },
{ name: 'rspec:windows 0 3', stage: 'test', status: :success,
queued_at: 8.hour.ago, started_at: 8.hour.ago, finished_at: 7.hour.ago },
{ name: 'rspec:windows 1 3', stage: 'test', status: :success,
queued_at: 8.hour.ago, started_at: 8.hour.ago, finished_at: 7.hour.ago },
{ name: 'rspec:windows 2 3', stage: 'test', status: :success,
queued_at: 8.hour.ago, started_at: 8.hour.ago, finished_at: 7.hour.ago },
{ name: 'rspec:windows 2 3', stage: 'test', status: :success,
queued_at: 8.hour.ago, started_at: 8.hour.ago, finished_at: 7.hour.ago },
{ name: 'rspec:osx', stage: 'test', status_event: :success,
queued_at: 8.hour.ago, started_at: 8.hour.ago, finished_at: 7.hour.ago },
{ name: 'spinach:linux', stage: 'test', status: :success,
queued_at: 8.hour.ago, started_at: 8.hour.ago, finished_at: 7.hour.ago },
{ name: 'spinach:osx', stage: 'test', status: :failed, allow_failure: true,
queued_at: 8.hour.ago, started_at: 8.hour.ago, finished_at: 7.hour.ago },
# deploy stage
{ name: 'staging', stage: 'deploy', environment: 'staging', status_event: :success,
options: { environment: { action: 'start', on_stop: 'stop staging' } },
queued_at: 7.hour.ago, started_at: 6.hour.ago, finished_at: 4.hour.ago },
{ name: 'stop staging', stage: 'deploy', environment: 'staging',
when: 'manual', status: :skipped },
{ name: 'production', stage: 'deploy', environment: 'production',
when: 'manual', status: :skipped },
# notify stage
{ name: 'slack', stage: 'notify', when: 'manual', status: :created },
]
EXTERNAL_JOBS = [
{ name: 'jenkins', stage: 'test', status: :success,
queued_at: 7.hour.ago, started_at: 6.hour.ago, finished_at: 4.hour.ago },
]
def initialize(project)
@project = project
end
def seed!
pipelines.each do |pipeline|
begin
BUILDS.each { |opts| build_create!(pipeline, opts) }
EXTERNAL_JOBS.each { |opts| commit_status_create!(pipeline, opts) }
print '.'
rescue ActiveRecord::RecordInvalid
print 'F'
ensure
pipeline.update_duration
pipeline.update_status
end
end
end
private
def pipelines
create_master_pipelines + create_merge_request_pipelines
end
def create_master_pipelines
@project.repository.commits('master', limit: 4).map do |commit|
create_pipeline!(@project, 'master', commit)
end
rescue
[]
end
def create_merge_request_pipelines
pipelines = @project.merge_requests.first(3).map do |merge_request|
project = merge_request.source_project
branch = merge_request.source_branch
merge_request.commits.last(4).map do |commit|
create_pipeline!(project, branch, commit)
end
end
pipelines.flatten
rescue
[]
end
def create_pipeline!(project, ref, commit)
project.pipelines.create(sha: commit.id, ref: ref)
end
def build_create!(pipeline, opts = {})
attributes = job_attributes(pipeline, opts)
.merge(commands: '$ build command')
Ci::Build.create!(attributes).tap do |build|
# We need to set build trace and artifacts after saving a build
# (id required), that is why we need `#tap` method instead of passing
# block directly to `Ci::Build#create!`.
setup_artifacts(build)
setup_build_log(build)
build.save
end
end
def setup_artifacts(build)
return unless %w[build test].include?(build.stage)
artifacts_cache_file(artifacts_archive_path) do |file|
build.artifacts_file = file
end
artifacts_cache_file(artifacts_metadata_path) do |file|
build.artifacts_metadata = file
end
end
def setup_build_log(build)
if %w(running success failed).include?(build.status)
build.trace = FFaker::Lorem.paragraphs(6).join("\n\n")
end
end
def commit_status_create!(pipeline, opts = {})
attributes = job_attributes(pipeline, opts)
GenericCommitStatus.create!(attributes)
end
def job_attributes(pipeline, opts)
{ name: 'test build', stage: 'test', stage_idx: stage_index(opts[:stage]),
ref: pipeline.ref, tag: false, user: build_user, project: @project, pipeline: pipeline,
created_at: Time.now, updated_at: Time.now
}.merge(opts)
end
def build_user
@project.team.users.sample
end
def build_status
Ci::Build::AVAILABLE_STATUSES.sample
end
def stage_index(stage)
STAGES.index(stage) || 0
end
def artifacts_archive_path
Rails.root + 'spec/fixtures/ci_build_artifacts.zip'
end
def artifacts_metadata_path
Rails.root + 'spec/fixtures/ci_build_artifacts_metadata.gz'
end
def artifacts_cache_file(file_path)
cache_path = file_path.to_s.gsub('ci_', "p#{@project.id}_")
FileUtils.copy(file_path, cache_path)
File.open(cache_path) do |file|
yield file
end
end
end
Gitlab::Seeder.quiet do
Project.all.sample(5).each do |project|
project_builds = Gitlab::Seeder::Pipelines.new(project)
project_builds.seed!
end
end