Drop Log Collection Backend

In containerized deployments we can't support log collection, because we
can't mount the log depot. In appliance deployments, we're trying to get
away from the application UI having anything to do with the system it's
running on to avoid the need to elevate permissions. As such, this
commit removes log collection from backend. The UI will be done
separately.

Instead, on appliances, users can manually mount an NFS server (or
really any server type - even more than our UI supports), and then use
the /var/www/miq/vmdb/tools/collect_logs tool. If the user needs
scheduling, they can schedule a cron on the appliance to run the tool.

Author: Fryguy

Gemfile

@@ -75,7 +75,6 @@ gem "rake",                             ">=12.3.3",          :require => false
 gem "rest-client",                      "~>2.1.0",           :require => false
 gem "ruby_parser",                                           :require => false # Required for i18n string extraction, and DescentdantLoader (via prism)
 gem "ruby-progressbar",                 "~>1.7.0",           :require => false
-gem "rubyzip",                          "~>2.0.0",           :require => false
 gem "rugged",                           "~>1.9",             :require => false
 gem "ruport",                           "~>1.8.0"
 gem "snmp",                             "~>1.2.0",           :require => false

app/models/file_depot.rb

@@ -5,7 +5,6 @@ class FileDepot < ApplicationRecord
   include YamlImportExportMixin
 
   has_many              :miq_schedules, :dependent => :nullify
-  has_many              :miq_servers,   :dependent => :nullify, :foreign_key => :log_file_depot_id
   has_many              :log_files
   validates_presence_of :uri
 
@@ -23,10 +22,6 @@ def self.requires_credentials?
     true
   end
 
-  def requires_support_case?
-    false
-  end
-
   def upload_file(file)
     @file = file
   end

app/models/log_file.rb

@@ -77,54 +77,6 @@ def file_exists?
     klass.new(legacy_depot_hash).exist?(log_uri)
   end
 
-  # main UI method to call to request logs from a server
-  def self.logs_from_server(*args)
-    options = args.extract_options!
-    userid  = args[0] || "system"
-
-    # If no server provided, use the MiqServer receiving this request
-    server = args[1] || MiqServer.my_server
-
-    # All server types who provide logs must implement the following instance methods:
-    #   - my_zone:     which returns the zone in which they reside
-    #   - who_am_i:    which returns a log friendly string of the server's class and id
-    [:my_zone, :who_am_i].each { |meth| raise "#{meth} not implemented for #{server.class.name}" unless server.respond_to?(meth) }
-    zone     = server.my_zone
-    resource = server.who_am_i
-
-    _log.info("Queueing the request by userid: [#{userid}] for logs from server: [#{resource}]")
-
-    begin
-      # Create the task for the UI to check
-      task = MiqTask.create(:name => "Zipped log retrieval for [#{resource}]", :userid => userid, :miq_server_id => server.id)
-
-      # callback only on exceptions.. ie, on errors... second level callback will set status to finished
-      cb = {:class_name => task.class.name, :instance_id => task.id, :method_name => :queue_callback_on_exceptions, :args => ['Finished']}
-
-      # Queue the async fetch of the logs from the server - specifying a timeout, the zone to process this request, and a callback
-      options = options.merge(:taskid => task.id, :klass => server.class.name, :id => server.id)
-
-      MiqQueue.put(
-        :class_name   => name,
-        :method_name  => "_request_logs",
-        :args         => [options],
-        :zone         => zone,
-        :miq_callback => cb,
-        :msg_timeout  => LOG_REQUEST_TIMEOUT,
-        :priority     => MiqQueue::HIGH_PRIORITY
-      )
-    rescue => err
-      task.queue_callback_on_exceptions('Finished', 'error', err.to_s, nil) if task
-      raise
-    else
-      # return task id to the UI
-      msg = "Queued the request for logs from server: [#{resource}]"
-      task.update_status("Queued", "Ok", msg)
-      _log.info("Task: [#{task.id}] #{msg}")
-      task.id
-    end
-  end
-
   def self.historical_logfile
     empty_logfile(true)
   end
@@ -139,14 +91,6 @@ def self.empty_logfile(historical)
                    :description => "Default logfile")
   end
 
-  def self.ping_timeout
-    ::Settings.log.collection.ping_depot_timeout
-  end
-
-  def self.do_ping?
-    ::Settings.log.collection.ping_depot == true
-  end
-
   def upload_log_file_ftp
     file_depot.upload_file(self)
   end
@@ -222,51 +166,4 @@ def legacy_depot_hash
       :password => file_depot.authentication_password,
     }
   end
-
-  def self._request_logs(options)
-    taskid = options[:taskid]
-    klass  = options.delete(:klass).to_s
-    id     = options.delete(:id)
-
-    log_header = "Task: [#{taskid}]"
-
-    server   = Object.const_get(klass).find(id)
-    resource = server.who_am_i
-
-    # server must implement an instance method: started_on? which returns whether the server is started
-    unless server.respond_to?(:started?)
-      raise MiqException::Error, _("started? not implemented for %{server_name}") % {:server_name => server.class.name}
-    end
-
-    unless server.started?
-      if server.respond_to?(:name)
-        raise MiqException::Error,
-              _("Log request failed since [%{resource} %{server_name}] is not started") % {:resource    => resource,
-                                                                                           :server_name => server.name}
-      else
-        raise MiqException::Error,
-              _("Log request failed since [%{resource}] is not started") % {:resource => resource}
-      end
-    end
-
-    task = MiqTask.find(taskid)
-
-    msg = "Requesting logs from server: [#{resource}]"
-    _log.info("#{log_header} #{msg}")
-    task.update_status("Active", "Ok", msg)
-
-    cb = {:class_name => task.class.name, :instance_id => task.id, :method_name => :queue_callback_on_exceptions, :args => ['Finished']}
-    unless server.respond_to?(:_post_my_logs)
-      raise MiqException::Error,
-            _("_post_my_logs not implemented for %{server_name}") % {:server_name => server.class.name}
-    end
-    options = options.merge(:callback => cb, :timeout => LOG_REQUEST_TIMEOUT)
-    server._post_my_logs(options)
-
-    msg = "Requested logs from: [#{resource}]"
-    _log.info("#{log_header} #{msg}")
-    task.update_status("Queued", "Ok", msg)
-  end
-
-  private_class_method :_request_logs
 end

app/models/miq_server.rb

@@ -5,7 +5,6 @@ class MiqServer < ApplicationRecord
   include ServerSmartProxy
   include ConfigurationManagement
   include EnvironmentManagement
-  include LogManagement
   include QueueManagement
   include RoleManagement
   include StatusManagement
@@ -323,10 +322,6 @@ def friendly_name
     _("EVM Server (%{id})") % {:id => pid}
   end
 
-  def who_am_i
-    @who_am_i ||= "#{name} #{my_zone} #{self.class.name} #{id}"
-  end
-
   def database_application_name
     "MIQ|#{Process.pid}|#{compressed_id}|-|#{zone.compressed_id}|Server|#{zone.name}".truncate(64)
   end