Merge branch 'fix/sm/fix_pages_worker' into 'master'

app/services/projects/update_pages_service.rb

 module Projects
   class UpdatePagesService < BaseService
+    InvaildStateError = Class.new(StandardError)
+    FailedToExtractError = Class.new(StandardError)
+
     BLOCK_SIZE = 32.kilobytes
     MAX_SIZE = 1.terabyte
     SITE_PATH = 'public/'.freeze
@@ -11,13 +14,15 @@ module Projects
     end
 
     def execute
+      register_attempt
+
       # Create status notifying the deployment of pages
       @status = create_status
       @status.enqueue!
       @status.run!
 
-      raise 'missing pages artifacts' unless build.artifacts?
-      raise 'pages are outdated' unless latest?
+      raise InvaildStateError, 'missing pages artifacts' unless build.artifacts?
+      raise InvaildStateError, 'pages are outdated' unless latest?
 
       # Create temporary directory in which we will extract the artifacts
       FileUtils.mkdir_p(tmp_path)
@@ -26,24 +31,22 @@ module Projects
 
         # Check if we did extract public directory
         archive_public_path = File.join(archive_path, 'public')
-        raise 'pages miss the public folder' unless Dir.exist?(archive_public_path)
-        raise 'pages are outdated' unless latest?
+        raise FailedToExtractError, 'pages miss the public folder' unless Dir.exist?(archive_public_path)
+        raise InvaildStateError, 'pages are outdated' unless latest?
 
         deploy_page!(archive_public_path)
         success
       end
-    rescue => e
+    rescue InvaildStateError, FailedToExtractError => e
       register_failure
       error(e.message)
-    ensure
-      register_attempt
-      build.erase_artifacts! unless build.has_expiring_artifacts?
     end
 
     private
 
     def success
       @status.success
+      delete_artifact!
       super
     end
 
@@ -52,6 +55,7 @@ module Projects
       @status.allow_failure = !latest?
       @status.description = message
       @status.drop(:script_failure)
+      delete_artifact!
       super
     end
 
@@ -72,7 +76,7 @@ module Projects
       elsif artifacts.ends_with?('.zip')
         extract_zip_archive!(temp_path)
       else
-        raise 'unsupported artifacts format'
+        raise FailedToExtractError, 'unsupported artifacts format'
       end
     end
 
@@ -81,17 +85,17 @@ module Projects
                                %W(dd bs=#{BLOCK_SIZE} count=#{blocks}),
                                %W(tar -x -C #{temp_path} #{SITE_PATH}),
                                err: '/dev/null')
-      raise 'pages failed to extract' unless results.compact.all?(&:success?)
+      raise FailedToExtractError, 'pages failed to extract' unless results.compact.all?(&:success?)
     end
 
     def extract_zip_archive!(temp_path)
-      raise 'missing artifacts metadata' unless build.artifacts_metadata?
+      raise FailedToExtractError, 'missing artifacts metadata' unless build.artifacts_metadata?
 
       # Calculate page size after extract
       public_entry = build.artifacts_metadata_entry(SITE_PATH, recursive: true)
 
       if public_entry.total_size > max_size
-        raise "artifacts for pages are too large: #{public_entry.total_size}"
+        raise FailedToExtractError, "artifacts for pages are too large: #{public_entry.total_size}"
       end
 
       # Requires UnZip at least 6.00 Info-ZIP.
@@ -100,7 +104,7 @@ module Projects
       # We add * to end of SITE_PATH, because we want to extract SITE_PATH and all subdirectories
       site_path = File.join(SITE_PATH, '*')
       unless system(*%W(unzip -qq -n #{artifacts} #{site_path} -d #{temp_path}))
-        raise 'pages failed to extract'
+        raise FailedToExtractError, 'pages failed to extract'
       end
     end
 
@@ -163,6 +167,11 @@ module Projects
       build.artifacts_file.path
     end
 
+    def delete_artifact!
+      build.reload # Reload stable object to prevent erase artifacts with old state
+      build.erase_artifacts! unless build.has_expiring_artifacts?
+    end
+
     def latest_sha
       project.commit(build.ref).try(:sha).to_s
     end

app/workers/pages_worker.rb

 class PagesWorker
   include ApplicationWorker
 
-  sidekiq_options retry: false
+  sidekiq_options retry: 3
 
   def perform(action, *arg)
     send(action, *arg) # rubocop:disable GitlabSecurity/PublicSend

changelogs/unreleased/fix-sm-fix_pages_worker.yml

+---
+title: Fix pages flaky failure by reloading stale object
+merge_request: 17522
+author:
+type: fixed

spec/services/projects/update_pages_service_spec.rb

@@ -34,6 +34,7 @@ describe Projects::UpdatePagesService do
           context 'with expiry date' do
             before do
               build.artifacts_expire_in = "2 days"
+              build.save!
             end
 
             it "doesn't delete artifacts" do
@@ -105,6 +106,7 @@ describe Projects::UpdatePagesService do
         context 'with expiry date' do
           before do
             build.artifacts_expire_in = "2 days"
+            build.save!
           end
 
           it "doesn't delete artifacts" do
@@ -159,6 +161,20 @@ describe Projects::UpdatePagesService do
 
         expect(execute).not_to eq(:success)
       end
+
+      context 'when timeout happens by DNS error' do
+        before do
+          allow_any_instance_of(described_class)
+            .to receive(:extract_zip_archive!).and_raise(SocketError)
+        end
+
+        it 'raises an error' do
+          expect { execute }.to raise_error(SocketError)
+
+          build.reload
+          expect(build.artifacts?).to eq(true)
+        end
+      end
     end
   end