Unable to delete a host from Red Hat Satellite 6 with OpenSCAP reports

Solution Verified - Updated -

Environment

  • Red Hat Satellite v 6.2
  • Red Hat Satellite v 6.3

Issue

  • Unable to delete a host from Red Hat Satellite 6 with OpenSCAP reports
  • After upgrading Red Hat Satellite 6 server, deleting a host fails with the following error

    Error: PG::Error: ERROR: update or delete on table "hosts" violates foreign key constraint "reports_host_id_fk" on table "reports" DETAIL: Key (id)=(8) is still referenced from table "reports". : DELETE FROM "hosts" WHERE "hosts"."type" IN ('Host::Managed') AND "hosts"."id" = $1
    

Resolution

  • This issue has been fixed in Satellite version 6.4 under errata RHSA-2018:2927.

WORKAROUND

  • As a workaround for Satellite 6.2 and 6.3, follow below steps:

    • Take a backup of the file usr/share/foreman/app/models/host/managed.rb and edit it
    [root@satellite ~]# cp -p /usr/share/foreman/app/models/host/{managed.rb,managed.rb.bak}
    [root@satellite ~]# vi /usr/share/foreman/app/models/host/managed.rb
    
    • Replace below block of code in /usr/share/foreman/app/models/host/managed.rb file
        def remove_reports
            return if reports.empty?
            Log.delete_all("report_id IN (#{reports.pluck(:id).join(',')})")
            Report.delete_all("host_id = #{id}")
          end
    

    With the following lines

        def remove_reports
            host_reports = Report.where("host_id = #{id}")
            return if host_reports.count == 0
            Log.where("report_id IN (#{host_reports.pluck(:id).join(',')})").delete_all
            host_reports.delete_all
          end
    
    • Restart httpd service
        [root@satellite ~]# systemctl restart httpd
    

Root Cause

  • If Hosts with 0 config reports and at least 1 or more OpenSCAP ARF reports exists, then it will fail to delete that specific host because of a foreign key constraint set on the reports table in foreman database.

Diagnostic Steps

  • In /var/log/foreman/production.log following unsuccessful attempt to delete a problematic host would appear.

    2018-07-19 12:36:08 a50fcf41 [app] [I] Started DELETE "/hosts/client.example.com" for 192.168.X.X at 2018-07-16 07:36:08 +0200
    2018-07-19 12:36:08 a50fcf41 [app] [I] Processing by HostsController#destroy as HTML
    2018-07-19 12:36:08 a50fcf41 [app] [I]   Parameters: {"authenticity_token"=+FILTERED+ "id"=>"client.example.com"}
    2018-07-19 12:36:08 a50fcf41 [app] [I] Current user: admin (administrator)
    2018-07-19 12:36:08 a50fcf41 [app] [I] Expire fragment views/tabs_and_title_records-6 (0.1ms)
    2018-07-19 12:36:09 a50fcf41 [app] [I] Failed to save:
    2018-07-19 12:36:09 a50fcf41 [app] [I] Redirected to https://satellite.example.com/hosts
    2018-07-19 12:36:09 a50fcf41 [app] [I] Completed 302 Found in 614ms (ActiveRecord: 81.4ms)
    

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