Handle parsing OpenBSD ps output properly to display sidekiq

app/controllers/admin/background_jobs_controller.rb

 class Admin::BackgroundJobsController < Admin::ApplicationController
   def show
     ps_output, _ = Gitlab::Popen.popen(%W(ps ww -U #{Gitlab.config.gitlab.user} -o pid,pcpu,pmem,stat,start,command))
-    @sidekiq_processes = ps_output.split("\n").grep(/sidekiq/)
+    @sidekiq_processes = ps_output.split("\n").grep(/sidekiq \d+\.\d+\.\d+/)
     @concurrency = Sidekiq.options[:concurrency]
   end
 end

app/helpers/sidekiq_helper.rb

@@ -3,9 +3,9 @@ module SidekiqHelper
     (?<pid>\d+)\s+
     (?<cpu>[\d\.,]+)\s+
     (?<mem>[\d\.,]+)\s+
-    (?<state>[DRSTWXZNLsl\+<]+)\s+
-    (?<start>.+)\s+
-    (?<command>sidekiq.*\])
+    (?<state>[DIEKNRSTVWXZNLpsl\+<>\/\d]+)\s+
+    (?<start>.+?)\s+
+    (?<command>(?:ruby\d+:\s+)?sidekiq.*\].*)
     \z/x
 
   def parse_sidekiq_ps(line)

changelogs/unreleased/fix_admin_monitoring_background.yml

+---
+title: Handle parsing OpenBSD ps output properly to display sidekiq infos on admin->monitoring->background
+merge_request: 10303
+author: Sebastian Reitenbach

spec/helpers/sidekiq_helper_spec.rb

@@ -53,6 +53,14 @@ describe SidekiqHelper do
       expect(parts).to eq(['17725', '1.0', '12.1', 'Ssl', '19:20:15', 'sidekiq 4.2.1 gitlab-rails [0 of 25 busy]'])
     end
 
+    it 'parses OpenBSD output' do
+      # OpenBSD 6.1
+      line = '49258  0.5  2.3 R/0   Fri10PM  ruby23: sidekiq 4.2.7 gitlab [0 of 25 busy] (ruby23)'
+      parts = helper.parse_sidekiq_ps(line)
+
+      expect(parts).to eq(['49258', '0.5', '2.3', 'R/0', 'Fri10PM', 'ruby23: sidekiq 4.2.7 gitlab [0 of 25 busy] (ruby23)'])
+    end
+
     it 'does fail gracefully on line not matching the format' do
       line = '55137	10.0	2.1	S+	2:30pm	something'
       parts = helper.parse_sidekiq_ps(line)