time: expose clock source sync (#2058)

tools/e2e-output.txt

@@ -125,7 +125,6 @@ windows_exporter_collector_success{collector="os"} 1
 windows_exporter_collector_success{collector="pagefile"} 1
 windows_exporter_collector_success{collector="performancecounter"} 1
 windows_exporter_collector_success{collector="physical_disk"} 1
-windows_exporter_collector_success{collector="printer"} 1
 windows_exporter_collector_success{collector="process"} 1
 windows_exporter_collector_success{collector="scheduled_task"} 1
 windows_exporter_collector_success{collector="service"} 1
@@ -148,7 +147,6 @@ windows_exporter_collector_timeout{collector="os"} 0
 windows_exporter_collector_timeout{collector="pagefile"} 0
 windows_exporter_collector_timeout{collector="performancecounter"} 0
 windows_exporter_collector_timeout{collector="physical_disk"} 0
-windows_exporter_collector_timeout{collector="printer"} 0
 windows_exporter_collector_timeout{collector="process"} 0
 windows_exporter_collector_timeout{collector="scheduled_task"} 0
 windows_exporter_collector_timeout{collector="service"} 0
@@ -355,10 +353,6 @@ windows_exporter_collector_timeout{collector="udp"} 0
 # TYPE windows_physical_disk_write_seconds_total counter
 # HELP windows_physical_disk_writes_total The number of write operations on the disk (PhysicalDisk.DiskWritesPerSec)
 # TYPE windows_physical_disk_writes_total counter
-# HELP windows_printer_job_count Number of jobs processed by the printer since the last reset
-# TYPE windows_printer_job_count counter
-# HELP windows_printer_status Printer status
-# TYPE windows_printer_status gauge
 # HELP windows_scheduled_task_last_result The result that was returned the last time the registered task was run
 # TYPE windows_scheduled_task_last_result gauge
 windows_scheduled_task_last_result{task="/Microsoft/Windows/PLA/GAEvents"} 0
@@ -433,13 +427,15 @@ windows_service_state{name="Themes",state="stopped"} 0
 # TYPE windows_tcp_segments_total counter
 # HELP windows_textfile_mtime_seconds Unixtime mtime of textfiles successfully read.
 # TYPE windows_textfile_mtime_seconds gauge
+# HELP windows_time_clock_sync_source This value reflects the sync source of the system clock.
+# TYPE windows_time_clock_sync_source gauge
 # HELP windows_time_clock_frequency_adjustment This value reflects the adjustment made to the local system clock frequency by W32Time in nominal clock units. This counter helps visualize the finer adjustments being made by W32time to synchronize the local clock.
 # TYPE windows_time_clock_frequency_adjustment gauge
 # HELP windows_time_clock_frequency_adjustment_ppb This value reflects the adjustment made to the local system clock frequency by W32Time in Parts Per Billion (PPB) units. 1 PPB adjustment imples the system clock was adjusted at a rate of 1 nanosecond per second. The smallest possible adjustment can vary and can be expected to be in the order of 100's of PPB. This counter helps visualize the finer actions being taken by W32time to synchronize the local clock.
 # TYPE windows_time_clock_frequency_adjustment_ppb gauge
 # HELP windows_time_computed_time_offset_seconds Absolute time offset between the system clock and the chosen time source, in seconds
 # TYPE windows_time_computed_time_offset_seconds gauge
-# HELP windows_time_current_timestamp_seconds OperatingSystem.LocalDateTime
+# HELP windows_time_current_timestamp_seconds Current time as reported by the operating system, in unix time.
 # TYPE windows_time_current_timestamp_seconds gauge
 # HELP windows_time_ntp_client_time_sources Active number of NTP Time sources being used by the client
 # TYPE windows_time_ntp_client_time_sources gauge
@@ -449,7 +445,7 @@ windows_service_state{name="Themes",state="stopped"} 0
 # TYPE windows_time_ntp_server_incoming_requests_total counter
 # HELP windows_time_ntp_server_outgoing_responses_total Total number of requests responded to by NTP server
 # TYPE windows_time_ntp_server_outgoing_responses_total counter
-# HELP windows_time_timezone OperatingSystem.LocalDateTime
+# HELP windows_time_timezone Current timezone as reported by the operating system.
 # TYPE windows_time_timezone gauge
 # HELP windows_udp_datagram_no_port_total Number of received UDP datagrams for which there was no application at the destination port
 # TYPE windows_udp_datagram_no_port_total counter

tools/end-to-end-test.ps1

@@ -25,7 +25,7 @@ $skip_re = "^(go_|windows_exporter_build_info|windows_exporter_collector_duratio
 $exporter_proc = Start-Process `
     -PassThru `
     -FilePath ..\windows_exporter.exe `
-    -ArgumentList "--log.level=debug","--web.disable-exporter-metrics","--collectors.enabled=[defaults],cpu_info,textfile,process,pagefile,performancecounter,scheduled_task,tcp,udp,time,system,service,logical_disk,printer,os,net,memory,logon,cache","--collector.process.include=explorer.exe","--collector.scheduled_task.include=.*GAEvents","--collector.service.include=Themes","--collector.textfile.directories=$($textfile_dir)",@"
+    -ArgumentList "--log.level=debug","--web.disable-exporter-metrics","--collectors.enabled=[defaults],cpu_info,textfile,process,pagefile,performancecounter,scheduled_task,tcp,udp,time,system,service,logical_disk,os,net,memory,logon,cache","--collector.process.include=explorer.exe","--collector.scheduled_task.include=.*GAEvents","--collector.service.include=Themes","--collector.textfile.directories=$($textfile_dir)",@"
 --collector.performancecounter.objects="[{\"name\":\"cpu\",\"object\":\"Processor Information\",\"instances\":[\"*\"],\"instance_label\":\"core\",\"counters\":[{\"name\":\"% Processor Time\",\"metric\":\"windows_performancecounter_processor_information_processor_time\",\"labels\":{\"state\":\"active\"}},{\"name\":\"% Idle Time\",\"metric\":\"windows_performancecounter_processor_information_processor_time\",\"labels\":{\"state\":\"idle\"}}]},{\"name\":\"memory\",\"object\":\"Memory\",\"counters\":[{\"name\":\"Cache Faults/sec\",\"type\":\"counter\"}]}]"
 "@ `
     -WindowStyle Hidden `