Fix rollover bug in mountstats collector (#1364)

* Update procfs vendor to pull in github.com/prometheus/procfs/pull/165
* Update mountstats collector to use new types.
* Rollover counter automatically to avoid float64 accuracy issues.
* Update e2e test.

Signed-off-by: Ben Kochie <superq@gmail.com>

21 files changed, 771 insertions, 76 deletions

diff --git a/collector/fixtures/e2e-64k-page-output.txt b/collector/fixtures/e2e-64k-page-output.txt
index 47e8f9a..4653cd6 100644
--- a/collector/fixtures/e2e-64k-page-output.txt
+++ b/collector/fixtures/e2e-64k-page-output.txt
@@ -1577,6 +1577,7 @@ node_mountstats_nfs_event_write_extension_total{export="192.168.1.1:/srv/test",p
 node_mountstats_nfs_event_write_extension_total{export="192.168.1.1:/srv/test",protocol="udp"} 0
 # HELP node_mountstats_nfs_operations_major_timeouts_total Number of times a request has had a major timeout for a given operation.
 # TYPE node_mountstats_nfs_operations_major_timeouts_total counter
+node_mountstats_nfs_operations_major_timeouts_total{export="192.168.1.1:/srv/test",operation="ACCESS",protocol="udp"} 0
 node_mountstats_nfs_operations_major_timeouts_total{export="192.168.1.1:/srv/test",operation="NULL",protocol="tcp"} 0
 node_mountstats_nfs_operations_major_timeouts_total{export="192.168.1.1:/srv/test",operation="NULL",protocol="udp"} 0
 node_mountstats_nfs_operations_major_timeouts_total{export="192.168.1.1:/srv/test",operation="READ",protocol="tcp"} 0
@@ -1585,6 +1586,7 @@ node_mountstats_nfs_operations_major_timeouts_total{export="192.168.1.1:/srv/tes
 node_mountstats_nfs_operations_major_timeouts_total{export="192.168.1.1:/srv/test",operation="WRITE",protocol="udp"} 0
 # HELP node_mountstats_nfs_operations_queue_time_seconds_total Duration all requests spent queued for transmission for a given operation before they were sent, in seconds.
 # TYPE node_mountstats_nfs_operations_queue_time_seconds_total counter
+node_mountstats_nfs_operations_queue_time_seconds_total{export="192.168.1.1:/srv/test",operation="ACCESS",protocol="udp"} 9.007044786793922e+12
 node_mountstats_nfs_operations_queue_time_seconds_total{export="192.168.1.1:/srv/test",operation="NULL",protocol="tcp"} 0
 node_mountstats_nfs_operations_queue_time_seconds_total{export="192.168.1.1:/srv/test",operation="NULL",protocol="udp"} 0
 node_mountstats_nfs_operations_queue_time_seconds_total{export="192.168.1.1:/srv/test",operation="READ",protocol="tcp"} 0.006
@@ -1593,6 +1595,7 @@ node_mountstats_nfs_operations_queue_time_seconds_total{export="192.168.1.1:/srv
 node_mountstats_nfs_operations_queue_time_seconds_total{export="192.168.1.1:/srv/test",operation="WRITE",protocol="udp"} 0
 # HELP node_mountstats_nfs_operations_received_bytes_total Number of bytes received for a given operation, including RPC headers and payload.
 # TYPE node_mountstats_nfs_operations_received_bytes_total counter
+node_mountstats_nfs_operations_received_bytes_total{export="192.168.1.1:/srv/test",operation="ACCESS",protocol="udp"} 3.62996810236e+11
 node_mountstats_nfs_operations_received_bytes_total{export="192.168.1.1:/srv/test",operation="NULL",protocol="tcp"} 0
 node_mountstats_nfs_operations_received_bytes_total{export="192.168.1.1:/srv/test",operation="NULL",protocol="udp"} 0
 node_mountstats_nfs_operations_received_bytes_total{export="192.168.1.1:/srv/test",operation="READ",protocol="tcp"} 1.210292152e+09
@@ -1601,6 +1604,7 @@ node_mountstats_nfs_operations_received_bytes_total{export="192.168.1.1:/srv/tes
 node_mountstats_nfs_operations_received_bytes_total{export="192.168.1.1:/srv/test",operation="WRITE",protocol="udp"} 0
 # HELP node_mountstats_nfs_operations_request_time_seconds_total Duration all requests took from when a request was enqueued to when it was completely handled for a given operation, in seconds.
 # TYPE node_mountstats_nfs_operations_request_time_seconds_total counter
+node_mountstats_nfs_operations_request_time_seconds_total{export="192.168.1.1:/srv/test",operation="ACCESS",protocol="udp"} 1.953587717e+06
 node_mountstats_nfs_operations_request_time_seconds_total{export="192.168.1.1:/srv/test",operation="NULL",protocol="tcp"} 0
 node_mountstats_nfs_operations_request_time_seconds_total{export="192.168.1.1:/srv/test",operation="NULL",protocol="udp"} 0
 node_mountstats_nfs_operations_request_time_seconds_total{export="192.168.1.1:/srv/test",operation="READ",protocol="tcp"} 79.407
@@ -1609,6 +1613,7 @@ node_mountstats_nfs_operations_request_time_seconds_total{export="192.168.1.1:/s
 node_mountstats_nfs_operations_request_time_seconds_total{export="192.168.1.1:/srv/test",operation="WRITE",protocol="udp"} 0
 # HELP node_mountstats_nfs_operations_requests_total Number of requests performed for a given operation.
 # TYPE node_mountstats_nfs_operations_requests_total counter
+node_mountstats_nfs_operations_requests_total{export="192.168.1.1:/srv/test",operation="ACCESS",protocol="udp"} 2.927395007e+09
 node_mountstats_nfs_operations_requests_total{export="192.168.1.1:/srv/test",operation="NULL",protocol="tcp"} 0
 node_mountstats_nfs_operations_requests_total{export="192.168.1.1:/srv/test",operation="NULL",protocol="udp"} 0
 node_mountstats_nfs_operations_requests_total{export="192.168.1.1:/srv/test",operation="READ",protocol="tcp"} 1298
@@ -1617,6 +1622,7 @@ node_mountstats_nfs_operations_requests_total{export="192.168.1.1:/srv/test",ope
 node_mountstats_nfs_operations_requests_total{export="192.168.1.1:/srv/test",operation="WRITE",protocol="udp"} 0
 # HELP node_mountstats_nfs_operations_response_time_seconds_total Duration all requests took to get a reply back after a request for a given operation was transmitted, in seconds.
 # TYPE node_mountstats_nfs_operations_response_time_seconds_total counter
+node_mountstats_nfs_operations_response_time_seconds_total{export="192.168.1.1:/srv/test",operation="ACCESS",protocol="udp"} 1.667369447e+06
 node_mountstats_nfs_operations_response_time_seconds_total{export="192.168.1.1:/srv/test",operation="NULL",protocol="tcp"} 0
 node_mountstats_nfs_operations_response_time_seconds_total{export="192.168.1.1:/srv/test",operation="NULL",protocol="udp"} 0
 node_mountstats_nfs_operations_response_time_seconds_total{export="192.168.1.1:/srv/test",operation="READ",protocol="tcp"} 79.386
@@ -1625,6 +1631,7 @@ node_mountstats_nfs_operations_response_time_seconds_total{export="192.168.1.1:/
 node_mountstats_nfs_operations_response_time_seconds_total{export="192.168.1.1:/srv/test",operation="WRITE",protocol="udp"} 0
 # HELP node_mountstats_nfs_operations_sent_bytes_total Number of bytes sent for a given operation, including RPC headers and payload.
 # TYPE node_mountstats_nfs_operations_sent_bytes_total counter
+node_mountstats_nfs_operations_sent_bytes_total{export="192.168.1.1:/srv/test",operation="ACCESS",protocol="udp"} 5.26931094212e+11
 node_mountstats_nfs_operations_sent_bytes_total{export="192.168.1.1:/srv/test",operation="NULL",protocol="tcp"} 0
 node_mountstats_nfs_operations_sent_bytes_total{export="192.168.1.1:/srv/test",operation="NULL",protocol="udp"} 0
 node_mountstats_nfs_operations_sent_bytes_total{export="192.168.1.1:/srv/test",operation="READ",protocol="tcp"} 207680
@@ -1633,6 +1640,7 @@ node_mountstats_nfs_operations_sent_bytes_total{export="192.168.1.1:/srv/test",o
 node_mountstats_nfs_operations_sent_bytes_total{export="192.168.1.1:/srv/test",operation="WRITE",protocol="udp"} 0
 # HELP node_mountstats_nfs_operations_transmissions_total Number of times an actual RPC request has been transmitted for a given operation.
 # TYPE node_mountstats_nfs_operations_transmissions_total counter
+node_mountstats_nfs_operations_transmissions_total{export="192.168.1.1:/srv/test",operation="ACCESS",protocol="udp"} 2.927394995e+09
 node_mountstats_nfs_operations_transmissions_total{export="192.168.1.1:/srv/test",operation="NULL",protocol="tcp"} 0
 node_mountstats_nfs_operations_transmissions_total{export="192.168.1.1:/srv/test",operation="NULL",protocol="udp"} 0
 node_mountstats_nfs_operations_transmissions_total{export="192.168.1.1:/srv/test",operation="READ",protocol="tcp"} 1298
diff --git a/collector/fixtures/e2e-output.txt b/collector/fixtures/e2e-output.txt
index 147113e..baef224 100644
--- a/collector/fixtures/e2e-output.txt
+++ b/collector/fixtures/e2e-output.txt
@@ -1577,6 +1577,7 @@ node_mountstats_nfs_event_write_extension_total{export="192.168.1.1:/srv/test",p
 node_mountstats_nfs_event_write_extension_total{export="192.168.1.1:/srv/test",protocol="udp"} 0
 # HELP node_mountstats_nfs_operations_major_timeouts_total Number of times a request has had a major timeout for a given operation.
 # TYPE node_mountstats_nfs_operations_major_timeouts_total counter
+node_mountstats_nfs_operations_major_timeouts_total{export="192.168.1.1:/srv/test",operation="ACCESS",protocol="udp"} 0
 node_mountstats_nfs_operations_major_timeouts_total{export="192.168.1.1:/srv/test",operation="NULL",protocol="tcp"} 0
 node_mountstats_nfs_operations_major_timeouts_total{export="192.168.1.1:/srv/test",operation="NULL",protocol="udp"} 0
 node_mountstats_nfs_operations_major_timeouts_total{export="192.168.1.1:/srv/test",operation="READ",protocol="tcp"} 0
@@ -1585,6 +1586,7 @@ node_mountstats_nfs_operations_major_timeouts_total{export="192.168.1.1:/srv/tes
 node_mountstats_nfs_operations_major_timeouts_total{export="192.168.1.1:/srv/test",operation="WRITE",protocol="udp"} 0
 # HELP node_mountstats_nfs_operations_queue_time_seconds_total Duration all requests spent queued for transmission for a given operation before they were sent, in seconds.
 # TYPE node_mountstats_nfs_operations_queue_time_seconds_total counter
+node_mountstats_nfs_operations_queue_time_seconds_total{export="192.168.1.1:/srv/test",operation="ACCESS",protocol="udp"} 9.007044786793922e+12
 node_mountstats_nfs_operations_queue_time_seconds_total{export="192.168.1.1:/srv/test",operation="NULL",protocol="tcp"} 0
 node_mountstats_nfs_operations_queue_time_seconds_total{export="192.168.1.1:/srv/test",operation="NULL",protocol="udp"} 0
 node_mountstats_nfs_operations_queue_time_seconds_total{export="192.168.1.1:/srv/test",operation="READ",protocol="tcp"} 0.006
@@ -1593,6 +1595,7 @@ node_mountstats_nfs_operations_queue_time_seconds_total{export="192.168.1.1:/srv
 node_mountstats_nfs_operations_queue_time_seconds_total{export="192.168.1.1:/srv/test",operation="WRITE",protocol="udp"} 0
 # HELP node_mountstats_nfs_operations_received_bytes_total Number of bytes received for a given operation, including RPC headers and payload.
 # TYPE node_mountstats_nfs_operations_received_bytes_total counter
+node_mountstats_nfs_operations_received_bytes_total{export="192.168.1.1:/srv/test",operation="ACCESS",protocol="udp"} 3.62996810236e+11
 node_mountstats_nfs_operations_received_bytes_total{export="192.168.1.1:/srv/test",operation="NULL",protocol="tcp"} 0
 node_mountstats_nfs_operations_received_bytes_total{export="192.168.1.1:/srv/test",operation="NULL",protocol="udp"} 0
 node_mountstats_nfs_operations_received_bytes_total{export="192.168.1.1:/srv/test",operation="READ",protocol="tcp"} 1.210292152e+09
@@ -1601,6 +1604,7 @@ node_mountstats_nfs_operations_received_bytes_total{export="192.168.1.1:/srv/tes
 node_mountstats_nfs_operations_received_bytes_total{export="192.168.1.1:/srv/test",operation="WRITE",protocol="udp"} 0
 # HELP node_mountstats_nfs_operations_request_time_seconds_total Duration all requests took from when a request was enqueued to when it was completely handled for a given operation, in seconds.
 # TYPE node_mountstats_nfs_operations_request_time_seconds_total counter
+node_mountstats_nfs_operations_request_time_seconds_total{export="192.168.1.1:/srv/test",operation="ACCESS",protocol="udp"} 1.953587717e+06
 node_mountstats_nfs_operations_request_time_seconds_total{export="192.168.1.1:/srv/test",operation="NULL",protocol="tcp"} 0
 node_mountstats_nfs_operations_request_time_seconds_total{export="192.168.1.1:/srv/test",operation="NULL",protocol="udp"} 0
 node_mountstats_nfs_operations_request_time_seconds_total{export="192.168.1.1:/srv/test",operation="READ",protocol="tcp"} 79.407
@@ -1609,6 +1613,7 @@ node_mountstats_nfs_operations_request_time_seconds_total{export="192.168.1.1:/s
 node_mountstats_nfs_operations_request_time_seconds_total{export="192.168.1.1:/srv/test",operation="WRITE",protocol="udp"} 0
 # HELP node_mountstats_nfs_operations_requests_total Number of requests performed for a given operation.
 # TYPE node_mountstats_nfs_operations_requests_total counter
+node_mountstats_nfs_operations_requests_total{export="192.168.1.1:/srv/test",operation="ACCESS",protocol="udp"} 2.927395007e+09
 node_mountstats_nfs_operations_requests_total{export="192.168.1.1:/srv/test",operation="NULL",protocol="tcp"} 0
 node_mountstats_nfs_operations_requests_total{export="192.168.1.1:/srv/test",operation="NULL",protocol="udp"} 0
 node_mountstats_nfs_operations_requests_total{export="192.168.1.1:/srv/test",operation="READ",protocol="tcp"} 1298
@@ -1617,6 +1622,7 @@ node_mountstats_nfs_operations_requests_total{export="192.168.1.1:/srv/test",ope
 node_mountstats_nfs_operations_requests_total{export="192.168.1.1:/srv/test",operation="WRITE",protocol="udp"} 0
 # HELP node_mountstats_nfs_operations_response_time_seconds_total Duration all requests took to get a reply back after a request for a given operation was transmitted, in seconds.
 # TYPE node_mountstats_nfs_operations_response_time_seconds_total counter
+node_mountstats_nfs_operations_response_time_seconds_total{export="192.168.1.1:/srv/test",operation="ACCESS",protocol="udp"} 1.667369447e+06
 node_mountstats_nfs_operations_response_time_seconds_total{export="192.168.1.1:/srv/test",operation="NULL",protocol="tcp"} 0
 node_mountstats_nfs_operations_response_time_seconds_total{export="192.168.1.1:/srv/test",operation="NULL",protocol="udp"} 0
 node_mountstats_nfs_operations_response_time_seconds_total{export="192.168.1.1:/srv/test",operation="READ",protocol="tcp"} 79.386
@@ -1625,6 +1631,7 @@ node_mountstats_nfs_operations_response_time_seconds_total{export="192.168.1.1:/
 node_mountstats_nfs_operations_response_time_seconds_total{export="192.168.1.1:/srv/test",operation="WRITE",protocol="udp"} 0
 # HELP node_mountstats_nfs_operations_sent_bytes_total Number of bytes sent for a given operation, including RPC headers and payload.
 # TYPE node_mountstats_nfs_operations_sent_bytes_total counter
+node_mountstats_nfs_operations_sent_bytes_total{export="192.168.1.1:/srv/test",operation="ACCESS",protocol="udp"} 5.26931094212e+11
 node_mountstats_nfs_operations_sent_bytes_total{export="192.168.1.1:/srv/test",operation="NULL",protocol="tcp"} 0
 node_mountstats_nfs_operations_sent_bytes_total{export="192.168.1.1:/srv/test",operation="NULL",protocol="udp"} 0
 node_mountstats_nfs_operations_sent_bytes_total{export="192.168.1.1:/srv/test",operation="READ",protocol="tcp"} 207680
@@ -1633,6 +1640,7 @@ node_mountstats_nfs_operations_sent_bytes_total{export="192.168.1.1:/srv/test",o
 node_mountstats_nfs_operations_sent_bytes_total{export="192.168.1.1:/srv/test",operation="WRITE",protocol="udp"} 0
 # HELP node_mountstats_nfs_operations_transmissions_total Number of times an actual RPC request has been transmitted for a given operation.
 # TYPE node_mountstats_nfs_operations_transmissions_total counter
+node_mountstats_nfs_operations_transmissions_total{export="192.168.1.1:/srv/test",operation="ACCESS",protocol="udp"} 2.927394995e+09
 node_mountstats_nfs_operations_transmissions_total{export="192.168.1.1:/srv/test",operation="NULL",protocol="tcp"} 0
 node_mountstats_nfs_operations_transmissions_total{export="192.168.1.1:/srv/test",operation="NULL",protocol="udp"} 0
 node_mountstats_nfs_operations_transmissions_total{export="192.168.1.1:/srv/test",operation="READ",protocol="tcp"} 1298
diff --git a/collector/fixtures/proc/10/mountstats b/collector/fixtures/proc/10/mountstats
index ddddcd3..a1f24b5 100644
--- a/collector/fixtures/proc/10/mountstats
+++ b/collector/fixtures/proc/10/mountstats
@@ -31,6 +31,7 @@ device 192.168.1.1:/srv/test mounted on /mnt/nfs/test-dupe with fstype nfs4 stat
                 NULL: 0 0 0 0 0 0 0 0
                 READ: 1298 1298 0 207680 1210292152 6 79386 79407
                WRITE: 0 0 0 0 0 0 0 0
+              ACCESS: 2927395007 2927394995 0 526931094212 362996810236 18446743919241604546 1667369447 1953587717
 
 device 192.168.1.1:/srv/test mounted on /mnt/nfs/test-dupe with fstype nfs4 statvers=1.1
         opts:   rw,vers=4.0,rsize=1048576,wsize=1048576,namlen=255,acregmin=3,acregmax=60,acdirmin=30,acdirmax=60,hard,proto=udp,port=0,timeo=600,retrans=2,sec=sys,clientaddr=192.168.1.5,local_lock=none
@@ -46,3 +47,4 @@ device 192.168.1.1:/srv/test mounted on /mnt/nfs/test-dupe with fstype nfs4 stat
                 NULL: 0 0 0 0 0 0 0 0
                 READ: 1298 1298 0 207680 1210292152 6 79386 79407
                WRITE: 0 0 0 0 0 0 0 0
+              ACCESS: 2927395007 2927394995 0 526931094212 362996810236 18446743919241604546 1667369447 1953587717
diff --git a/collector/mountstats_linux.go b/collector/mountstats_linux.go
index 561c7aa..47827dd 100644
--- a/collector/mountstats_linux.go
+++ b/collector/mountstats_linux.go
@@ -21,6 +21,11 @@ import (
         "github.com/prometheus/procfs"
 )
 
+var (
+        // 64-bit float mantissa: https://en.wikipedia.org/wiki/Double-precision_floating-point_format
+        float64Mantissa uint64 = 9007199254740992
+)
+
 type mountStatsCollector struct {
         // General statistics
         NFSAgeSecondsTotal *prometheus.Desc
@@ -618,7 +623,7 @@ func (c *mountStatsCollector) updateNFSStats(ch chan<- prometheus.Metric, export
         ch <- prometheus.MustNewConstMetric(
                 c.NFSTransportIdleTimeSeconds,
                 prometheus.GaugeValue,
-                s.Transport.IdleTime.Seconds(),
+                float64(s.Transport.IdleTimeSeconds%float64Mantissa),
                 export,
                 protocol,
         )
@@ -728,7 +733,7 @@ func (c *mountStatsCollector) updateNFSStats(ch chan<- prometheus.Metric, export
                 ch <- prometheus.MustNewConstMetric(
                         c.NFSOperationsQueueTimeSecondsTotal,
                         prometheus.CounterValue,
-                        op.CumulativeQueueTime.Seconds(),
+                        float64(op.CumulativeQueueMilliseconds%float64Mantissa)/1000.0,
                         export,
                         protocol,
                         op.Operation,
@@ -737,7 +742,7 @@ func (c *mountStatsCollector) updateNFSStats(ch chan<- prometheus.Metric, export
                 ch <- prometheus.MustNewConstMetric(
                         c.NFSOperationsResponseTimeSecondsTotal,
                         prometheus.CounterValue,
-                        op.CumulativeTotalResponseTime.Seconds(),
+                        float64(op.CumulativeTotalResponseMilliseconds%float64Mantissa)/1000.0,
                         export,
                         protocol,
                         op.Operation,
@@ -746,7 +751,7 @@ func (c *mountStatsCollector) updateNFSStats(ch chan<- prometheus.Metric, export
                 ch <- prometheus.MustNewConstMetric(
                         c.NFSOperationsRequestTimeSecondsTotal,
                         prometheus.CounterValue,
-                        op.CumulativeTotalRequestTime.Seconds(),
+                        float64(op.CumulativeTotalRequestMilliseconds%float64Mantissa)/1000.0,
                         export,
                         protocol,
                         op.Operation,
diff --git a/go.mod b/go.mod
index eb62ead..6d270b8 100644
--- a/go.mod
+++ b/go.mod
@@ -18,7 +18,7 @@ require (
         github.com/prometheus/client_golang v0.9.2
         github.com/prometheus/client_model v0.0.0-20190129233127-fd36f4220a90
         github.com/prometheus/common v0.3.0
-        github.com/prometheus/procfs v0.0.0-20190507043628-bc6930f2d510
+        github.com/prometheus/procfs v0.0.0-20190529155944-65bdadfa96ae
         github.com/siebenmann/go-kstat v0.0.0-20160321171754-d34789b79745
         github.com/sirupsen/logrus v1.4.1 // indirect
         github.com/soundcloud/go-runit v0.0.0-20150630195641-06ad41a06c4a
diff --git a/go.sum b/go.sum
index acd4a6a..7d08cbd 100644
--- a/go.sum
+++ b/go.sum
@@ -65,8 +65,8 @@ github.com/prometheus/common v0.3.0 h1:taZ4h8Tkxv2kNyoSctBvfXEHmBmxrwmIidZTIaHon
 github.com/prometheus/common v0.3.0/go.mod h1:TNfzLD0ON7rHzMJeJkieUDPYmFC7Snx/y86RQel1bk4=
 github.com/prometheus/procfs v0.0.0-20181005140218-185b4288413d/go.mod h1:c3At6R/oaqEKCNdg8wHV1ftS6bRYblBhIjjI8uT2IGk=
 github.com/prometheus/procfs v0.0.0-20181204211112-1dc9a6cbc91a/go.mod h1:c3At6R/oaqEKCNdg8wHV1ftS6bRYblBhIjjI8uT2IGk=
-github.com/prometheus/procfs v0.0.0-20190507043628-bc6930f2d510 h1:xDFyJxLucSC7yg81N/VozfnSEEB2dRj1VgR/YEzl5dA=
-github.com/prometheus/procfs v0.0.0-20190507043628-bc6930f2d510/go.mod h1:TjEm7ze935MbeOT/UhFTIMYKhuLP4wbCsTZCD3I8kEA=
+github.com/prometheus/procfs v0.0.0-20190529155944-65bdadfa96ae h1:kF6Y/ES9NQmW3t400V0XH+lO1jqvCpXBC1XoLDkvuMM=
+github.com/prometheus/procfs v0.0.0-20190529155944-65bdadfa96ae/go.mod h1:TjEm7ze935MbeOT/UhFTIMYKhuLP4wbCsTZCD3I8kEA=
 github.com/siebenmann/go-kstat v0.0.0-20160321171754-d34789b79745 h1:IuH7WumZNax0D+rEqmy2TyhKCzrtMGqbZO0b8rO00JA=
 github.com/siebenmann/go-kstat v0.0.0-20160321171754-d34789b79745/go.mod h1:G81aIFAMS9ECrwBYR9YxhlPjWgrItd+Kje78O6+uqm8=
 github.com/sirupsen/logrus v1.2.0/go.mod h1:LxeOpSwHxABJmUn/MG1IvRgCAasNZTLOkJPxbbu5VWo=
diff --git a/vendor/github.com/prometheus/procfs/MAINTAINERS.md b/vendor/github.com/prometheus/procfs/MAINTAINERS.md
index f1d3b99..56ba67d 100644
--- a/vendor/github.com/prometheus/procfs/MAINTAINERS.md
+++ b/vendor/github.com/prometheus/procfs/MAINTAINERS.md
@@ -1,2 +1,2 @@
-* Tobias Schmidt <tobidt@gmail.com> @grobie
 * Johannes 'fish' Ziemke <github@freigeist.org> @discordianfish
+* Paul Gier <pgier@redhat.com> @pgier
diff --git a/vendor/github.com/prometheus/procfs/Makefile b/vendor/github.com/prometheus/procfs/Makefile
index 314d1ba..616a0d2 100644
--- a/vendor/github.com/prometheus/procfs/Makefile
+++ b/vendor/github.com/prometheus/procfs/Makefile
@@ -14,6 +14,7 @@
 include Makefile.common
 
 %/.unpacked: %.ttar
+        @echo ">> extracting fixtures"
         ./ttar -C $(dir $*) -x -f $*.ttar
         touch $@
 
diff --git a/vendor/github.com/prometheus/procfs/Makefile.common b/vendor/github.com/prometheus/procfs/Makefile.common
index 4f18ea5..c7f9ea6 100644
--- a/vendor/github.com/prometheus/procfs/Makefile.common
+++ b/vendor/github.com/prometheus/procfs/Makefile.common
@@ -69,7 +69,7 @@ else
         GO_BUILD_PLATFORM ?= $(GOHOSTOS)-$(GOHOSTARCH)
 endif
 
-PROMU_VERSION ?= 0.3.0
+PROMU_VERSION ?= 0.4.0
 PROMU_URL     := https://github.com/prometheus/promu/releases/download/v$(PROMU_VERSION)/promu-$(PROMU_VERSION).$(GO_BUILD_PLATFORM).tar.gz
 
 GOLANGCI_LINT :=
diff --git a/vendor/github.com/prometheus/procfs/README.md b/vendor/github.com/prometheus/procfs/README.md
index 2095494..951c043 100644
--- a/vendor/github.com/prometheus/procfs/README.md
+++ b/vendor/github.com/prometheus/procfs/README.md
@@ -1,7 +1,7 @@
 # procfs
 
 This procfs package provides functions to retrieve system, kernel and process
-metrics from the pseudo-filesystem proc.
+metrics from the pseudo-filesystems /proc and /sys.
 
 *WARNING*: This package is a work in progress. Its API may still break in
 backwards-incompatible ways without warnings. Use it at your own risk.
@@ -9,3 +9,38 @@ backwards-incompatible ways without warnings. Use it at your own risk.
 [![GoDoc](https://godoc.org/github.com/prometheus/procfs?status.png)](https://godoc.org/github.com/prometheus/procfs)
 [![Build Status](https://travis-ci.org/prometheus/procfs.svg?branch=master)](https://travis-ci.org/prometheus/procfs)
 [![Go Report Card](https://goreportcard.com/badge/github.com/prometheus/procfs)](https://goreportcard.com/report/github.com/prometheus/procfs)
+
+## Usage
+
+The procfs library is organized by packages based on whether the gathered data is coming from
+/proc, /sys, or both.  Each package contains an `FS` type which represents the path to either /proc, /sys, or both.  For example, current cpu statistics are gathered from
+`/proc/stat` and are available via the root procfs package.  First, the proc filesystem mount
+point is initialized, and then the stat information is read.
+
+```go
+fs, err := procfs.NewFS("/proc")
+stats, err := fs.NewStat()
+```
+
+## Building and Testing
+
+The procfs library is normally built as part of another application.  However, when making
+changes to the library, the `make test` command can be used to run the API test suite.
+
+### Updating Test Fixtures
+
+The procfs library includes a set of test fixtures which include many example files from
+the `/proc` and `/sys` filesystems.  These fixtures are included as a ttar (text tar) file
+which is extracted automatically during testing.  To add/update the test fixtures, first
+ensure the `fixtures` directory is up to date by removing the existing directory and then
+extracting the ttar file using `make fixtures/.unpacked` or just `make test`.
+
+```bash
+rm -rf fixtures
+make test
+```
+
+Next, make the required changes to the extracted files in the `fixtures` directory.  When
+the changes are complete, run `make update_fixtures` to create a new `fixtures.ttar` file
+based on the updated `fixtures` directory.  And finally, verify the changes using
+`git diff fixtures.ttar`.
diff --git a/vendor/github.com/prometheus/procfs/fixtures.ttar b/vendor/github.com/prometheus/procfs/fixtures.ttar
index f7f84ef..951d909 100644
--- a/vendor/github.com/prometheus/procfs/fixtures.ttar
+++ b/vendor/github.com/prometheus/procfs/fixtures.ttar
@@ -75,13 +75,13 @@ Max realtime timeout      unlimited            unlimited            us
 Mode: 644
 # ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 Path: fixtures/proc/26231/mountstats
-Lines: 19
+Lines: 20
 device rootfs mounted on / with fstype rootfs
 device sysfs mounted on /sys with fstype sysfs
 device proc mounted on /proc with fstype proc
 device /dev/sda1 mounted on / with fstype ext4
 device 192.168.1.1:/srv/test mounted on /mnt/nfs/test with fstype nfs4 statvers=1.1
-        opts:   rw,vers=4.0,rsize=1048576,wsize=1048576,namlen=255,acregmin=3,acregmax=60,acdirmin=30,acdirmax=60,hard,proto=tcp,port=0,timeo=600,retrans=2,sec=sys,clientaddr=192.168.1.5,local_lock=none
+        opts:   rw,vers=4.0,rsize=1048576,wsize=1048576,namlen=255,acregmin=3,acregmax=60,acdirmin=30,acdirmax=60,hard,proto=tcp,port=0,timeo=600,retrans=2,sec=sys,mountaddr=192.168.1.1,clientaddr=192.168.1.5,local_lock=none
         age:    13968
         caps:   caps=0xfff7,wtmult=512,dtsize=32768,bsize=0,namlen=255
         nfsv4:  bm0=0xfdffafff,bm1=0xf9be3e,bm2=0x0,acl=0x0,pnfs=not configured
@@ -94,6 +94,7 @@ device 192.168.1.1:/srv/test mounted on /mnt/nfs/test with fstype nfs4 statvers=
                 NULL: 0 0 0 0 0 0 0 0
                 READ: 1298 1298 0 207680 1210292152 6 79386 79407
                WRITE: 0 0 0 0 0 0 0 0
+              ACCESS: 2927395007 2927394995 0 526931094212 362996810236 18446743919241604546 1667369447 1953587717
 
 Mode: 644
 # ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
@@ -125,6 +126,63 @@ Lines: 1
 26231 (vim) R 5392 7446 5392 34835 7446 4218880 32533 309516 26 82 1677 44 158 99 20 0 1 0 82375 56274944 1981 18446744073709551615 4194304 6294284 140736914091744 140736914087944 139965136429984 0 0 12288 1870679807 0 0 0 17 0 0 0 31 0 0 8391624 8481048 16420864 140736914093252 140736914093279 140736914093279 140736914096107 0
 Mode: 644
 # ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: fixtures/proc/26231/status
+Lines: 53
+
+Name:   prometheus
+Umask:  0022
+State:  S (sleeping)
+Tgid:   1
+Ngid:   0
+Pid:    1
+PPid:   0
+TracerPid:      0
+Uid:    0       0       0       0
+Gid:    0       0       0       0
+FDSize: 128
+Groups:
+NStgid: 1
+NSpid:  1
+NSpgid: 1
+NSsid:  1
+VmPeak:    58472 kB
+VmSize:    58440 kB
+VmLck:         0 kB
+VmPin:         0 kB
+VmHWM:      8028 kB
+VmRSS:      6716 kB
+RssAnon:            2092 kB
+RssFile:            4624 kB
+RssShmem:              0 kB
+VmData:     2580 kB
+VmStk:       136 kB
+VmExe:       948 kB
+VmLib:      6816 kB
+VmPTE:       128 kB
+VmPMD:        12 kB
+VmSwap:      660 kB
+HugetlbPages:          0 kB
+Threads:        1
+SigQ:   8/63965
+SigPnd: 0000000000000000
+ShdPnd: 0000000000000000
+SigBlk: 7be3c0fe28014a03
+SigIgn: 0000000000001000
+SigCgt: 00000001800004ec
+CapInh: 0000000000000000
+CapPrm: 0000003fffffffff
+CapEff: 0000003fffffffff
+CapBnd: 0000003fffffffff
+CapAmb: 0000000000000000
+Seccomp:        0
+Cpus_allowed:   ff
+Cpus_allowed_list:      0-7
+Mems_allowed:   00000000,00000001
+Mems_allowed_list:      0
+voluntary_ctxt_switches:        4742839
+nonvoluntary_ctxt_switches:     1727500
+Mode: 644
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 Directory: fixtures/proc/26232
 Mode: 755
 # ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
@@ -160,23 +218,23 @@ SymlinkTo: ../../symlinktargets/xyz
 # ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 Path: fixtures/proc/26232/limits
 Lines: 17
-Limit                     Soft Limit           Hard Limit           Units     
-Max cpu time              unlimited            unlimited            seconds   
-Max file size             unlimited            unlimited            bytes     
-Max data size             unlimited            unlimited            bytes     
-Max stack size            8388608              unlimited            bytes     
-Max core file size        0                    unlimited            bytes     
-Max resident set          unlimited            unlimited            bytes     
-Max processes             29436                29436                processes 
-Max open files            1024                 4096                 files     
-Max locked memory         65536                65536                bytes     
-Max address space         unlimited            unlimited            bytes     
-Max file locks            unlimited            unlimited            locks     
-Max pending signals       29436                29436                signals   
-Max msgqueue size         819200               819200               bytes     
-Max nice priority         0                    0                    
-Max realtime priority     0                    0                    
-Max realtime timeout      unlimited            unlimited            us        
+Limit                     Soft Limit           Hard Limit           Units
+Max cpu time              unlimited            unlimited            seconds
+Max file size             unlimited            unlimited            bytes
+Max data size             unlimited            unlimited            bytes
+Max stack size            8388608              unlimited            bytes
+Max core file size        0                    unlimited            bytes
+Max resident set          unlimited            unlimited            bytes
+Max processes             29436                29436                processes
+Max open files            1024                 4096                 files
+Max locked memory         65536                65536                bytes
+Max address space         unlimited            unlimited            bytes
+Max file locks            unlimited            unlimited            locks
+Max pending signals       29436                29436                signals
+Max msgqueue size         819200               819200               bytes
+Max nice priority         0                    0
+Max realtime priority     0                    0
+Max realtime timeout      unlimited            unlimited            us
 Mode: 644
 # ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 Path: fixtures/proc/26232/root
@@ -206,9 +264,9 @@ Mode: 644
 # ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 Path: fixtures/proc/buddyinfo
 Lines: 3
-Node 0, zone      DMA      1      0      1      0      2      1      1      0      1      1      3 
-Node 0, zone    DMA32    759    572    791    475    194     45     12      0      0      0      0 
-Node 0, zone   Normal   4381   1093    185   1530    567    102      4      0      0      0      0 
+Node 0, zone      DMA      1      0      1      0      2      1      1      0      1      1      3
+Node 0, zone    DMA32    759    572    791    475    194     45     12      0      0      0      0
+Node 0, zone   Normal   4381   1093    185   1530    567    102      4      0      0      0      0
 Mode: 644
 # ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 Path: fixtures/proc/diskstats
@@ -302,13 +360,13 @@ Lines: 26
 Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10]
 md3 : active raid6 sda1[8] sdh1[7] sdg1[6] sdf1[5] sde1[11] sdd1[3] sdc1[10] sdb1[9]
       5853468288 blocks super 1.2 level 6, 64k chunk, algorithm 2 [8/8] [UUUUUUUU]
-      
+
 md127 : active raid1 sdi2[0] sdj2[1]
       312319552 blocks [2/2] [UU]
-      
+
 md0 : active raid1 sdk[2](S) sdi1[0] sdj1[1]
       248896 blocks [2/2] [UU]
-      
+
 md4 : inactive raid1 sda3[0] sdb3[1]
       4883648 blocks [2/2] [UU]
 
@@ -402,6 +460,26 @@ proc4 2 2 10853
 proc4ops 72 0 0 0 1098 2 0 0 0 0 8179 5896 0 0 0 0 5900 0 0 2 0 2 0 9609 0 2 150 1272 0 0 0 1236 0 0 0 0 3 3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
 Mode: 644
 # ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: fixtures/proc/net/unix
+Lines: 6
+Num       RefCount Protocol Flags    Type St Inode Path
+0000000000000000: 00000002 00000000 00010000 0001 01 3442596 /var/run/postgresql/.s.PGSQL.5432
+0000000000000000: 0000000a 00000000 00010000 0005 01 10061 /run/udev/control
+0000000000000000: 00000007 00000000 00000000 0002 01 12392 /dev/log
+0000000000000000: 00000003 00000000 00000000 0001 03 4787297 /var/run/postgresql/.s.PGSQL.5432
+0000000000000000: 00000003 00000000 00000000 0001 03 5091797
+Mode: 644
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: fixtures/proc/net/unix_without_inode
+Lines: 6
+Num       RefCount Protocol Flags    Type St Path
+0000000000000000: 00000002 00000000 00010000 0001 01 /var/run/postgresql/.s.PGSQL.5432
+0000000000000000: 0000000a 00000000 00010000 0005 01 /run/udev/control
+0000000000000000: 00000007 00000000 00000000 0002 01 /dev/log
+0000000000000000: 00000003 00000000 00000000 0001 03 /var/run/postgresql/.s.PGSQL.5432
+0000000000000000: 00000003 00000000 00000000 0001 03
+Mode: 644
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 Path: fixtures/proc/net/xfrm_stat
 Lines: 28
 XfrmInError                     1
@@ -1107,6 +1185,22 @@ Mode: 644
 Directory: fixtures/sys/devices/system
 Mode: 775
 # ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Directory: fixtures/sys/devices/system/clocksource
+Mode: 775
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Directory: fixtures/sys/devices/system/clocksource/clocksource0
+Mode: 775
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: fixtures/sys/devices/system/clocksource/clocksource0/available_clocksource
+Lines: 1
+tsc hpet acpi_pm 
+Mode: 444
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: fixtures/sys/devices/system/clocksource/clocksource0/current_clocksource
+Lines: 1
+tsc
+Mode: 644
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 Directory: fixtures/sys/devices/system/cpu
 Mode: 775
 # ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
diff --git a/vendor/github.com/prometheus/procfs/fs.go b/vendor/github.com/prometheus/procfs/fs.go
index 9c56c83..5b4a1f0 100644
--- a/vendor/github.com/prometheus/procfs/fs.go
+++ b/vendor/github.com/prometheus/procfs/fs.go
@@ -27,7 +27,7 @@ type FS struct {
 const DefaultMountPoint = fs.DefaultProcMountPoint
 
 // NewFS returns a new proc FS mounted under the given proc mountPoint. It will error
-// if the mount point dirctory can't be read or is a file.
+// if the mount point directory can't be read or is a file.
 func NewFS(mountPoint string) (FS, error) {
         fs, err := fs.NewFS(mountPoint)
         if err != nil {
diff --git a/vendor/github.com/prometheus/procfs/mountstats.go b/vendor/github.com/prometheus/procfs/mountstats.go
index fc385af..35b2ef3 100644
--- a/vendor/github.com/prometheus/procfs/mountstats.go
+++ b/vendor/github.com/prometheus/procfs/mountstats.go
@@ -69,8 +69,8 @@ type MountStats interface {
 type MountStatsNFS struct {
         // The version of statistics provided.
         StatVersion string
-        // The optional mountaddr of the NFS mount.
-        MountAddress string
+        // The mount options of the NFS mount.
+        Opts map[string]string
         // The age of the NFS mount.
         Age time.Duration
         // Statistics related to byte counters for various operations.
@@ -181,11 +181,11 @@ type NFSOperationStats struct {
         // Number of bytes received for this operation, including RPC headers and payload.
         BytesReceived uint64
         // Duration all requests spent queued for transmission before they were sent.
-        CumulativeQueueTime time.Duration
+        CumulativeQueueMilliseconds uint64
         // Duration it took to get a reply back after the request was transmitted.
-        CumulativeTotalResponseTime time.Duration
+        CumulativeTotalResponseMilliseconds uint64
         // Duration from when a request was enqueued to when it was completely handled.
-        CumulativeTotalRequestTime time.Duration
+        CumulativeTotalRequestMilliseconds uint64
 }
 
 // A NFSTransportStats contains statistics for the NFS mount RPC requests and
@@ -204,7 +204,7 @@ type NFSTransportStats struct {
         // spent waiting for connections to the server to be established.
         ConnectIdleTime uint64
         // Duration since the NFS mount last saw any RPC traffic.
-        IdleTime time.Duration
+        IdleTimeSeconds uint64
         // Number of RPC requests for this mount sent to the NFS server.
         Sends uint64
         // Number of RPC responses for this mount received from the NFS server.
@@ -342,10 +342,15 @@ func parseMountStatsNFS(s *bufio.Scanner, statVersion string) (*MountStatsNFS, e
 
                 switch ss[0] {
                 case fieldOpts:
+                        if stats.Opts == nil {
+                                stats.Opts = map[string]string{}
+                        }
                         for _, opt := range strings.Split(ss[1], ",") {
                                 split := strings.Split(opt, "=")
-                                if len(split) == 2 && split[0] == "mountaddr" {
-                                        stats.MountAddress = split[1]
+                                if len(split) == 2 {
+                                        stats.Opts[split[0]] = split[1]
+                                } else {
+                                        stats.Opts[opt] = ""
                                 }
                         }
                 case fieldAge:
@@ -519,15 +524,15 @@ func parseNFSOperationStats(s *bufio.Scanner) ([]NFSOperationStats, error) {
                 }
 
                 ops = append(ops, NFSOperationStats{
-                        Operation:                   strings.TrimSuffix(ss[0], ":"),
-                        Requests:                    ns[0],
-                        Transmissions:               ns[1],
-                        MajorTimeouts:               ns[2],
-                        BytesSent:                   ns[3],
-                        BytesReceived:               ns[4],
-                        CumulativeQueueTime:         time.Duration(ns[5]) * time.Millisecond,
-                        CumulativeTotalResponseTime: time.Duration(ns[6]) * time.Millisecond,
-                        CumulativeTotalRequestTime:  time.Duration(ns[7]) * time.Millisecond,
+                        Operation:                           strings.TrimSuffix(ss[0], ":"),
+                        Requests:                            ns[0],
+                        Transmissions:                       ns[1],
+                        MajorTimeouts:                       ns[2],
+                        BytesSent:                           ns[3],
+                        BytesReceived:                       ns[4],
+                        CumulativeQueueMilliseconds:         ns[5],
+                        CumulativeTotalResponseMilliseconds: ns[6],
+                        CumulativeTotalRequestMilliseconds:  ns[7],
                 })
         }
 
@@ -603,7 +608,7 @@ func parseNFSTransportStats(ss []string, statVersion string) (*NFSTransportStats
                 Bind:                     ns[1],
                 Connect:                  ns[2],
                 ConnectIdleTime:          ns[3],
-                IdleTime:                 time.Duration(ns[4]) * time.Second,
+                IdleTimeSeconds:          ns[4],
                 Sends:                    ns[5],
                 Receives:                 ns[6],
                 BadTransactionIDs:        ns[7],
diff --git a/vendor/github.com/prometheus/procfs/net_dev.go b/vendor/github.com/prometheus/procfs/net_dev.go
index 0063594..8249c98 100644
--- a/vendor/github.com/prometheus/procfs/net_dev.go
+++ b/vendor/github.com/prometheus/procfs/net_dev.go
@@ -75,7 +75,7 @@ func newNetDev(file string) (NetDev, error) {
         }
         defer f.Close()
 
-        nd := NetDev{}
+        netDev := NetDev{}
         s := bufio.NewScanner(f)
         for n := 0; s.Scan(); n++ {
                 // Skip the 2 header lines.
@@ -83,20 +83,20 @@ func newNetDev(file string) (NetDev, error) {
                         continue
                 }
 
-                line, err := nd.parseLine(s.Text())
+                line, err := netDev.parseLine(s.Text())
                 if err != nil {
-                        return nd, err
+                        return netDev, err
                 }
 
-                nd[line.Name] = *line
+                netDev[line.Name] = *line
         }
 
-        return nd, s.Err()
+        return netDev, s.Err()
 }
 
 // parseLine parses a single line from the /proc/net/dev file. Header lines
 // must be filtered prior to calling this method.
-func (nd NetDev) parseLine(rawLine string) (*NetDevLine, error) {
+func (netDev NetDev) parseLine(rawLine string) (*NetDevLine, error) {
         parts := strings.SplitN(rawLine, ":", 2)
         if len(parts) != 2 {
                 return nil, errors.New("invalid net/dev line, missing colon")
@@ -185,11 +185,11 @@ func (nd NetDev) parseLine(rawLine string) (*NetDevLine, error) {
 
 // Total aggregates the values across interfaces and returns a new NetDevLine.
 // The Name field will be a sorted comma separated list of interface names.
-func (nd NetDev) Total() NetDevLine {
+func (netDev NetDev) Total() NetDevLine {
         total := NetDevLine{}
 
-        names := make([]string, 0, len(nd))
-        for _, ifc := range nd {
+        names := make([]string, 0, len(netDev))
+        for _, ifc := range netDev {
                 names = append(names, ifc.Name)
                 total.RxBytes += ifc.RxBytes
                 total.RxPackets += ifc.RxPackets
diff --git a/vendor/github.com/prometheus/procfs/net_unix.go b/vendor/github.com/prometheus/procfs/net_unix.go
new file mode 100644
index 0000000..240340a
--- /dev/null
+++ b/vendor/github.com/prometheus/procfs/net_unix.go
@@ -0,0 +1,275 @@
+// Copyright 2018 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package procfs
+
+import (
+        "bufio"
+        "errors"
+        "fmt"
+        "io"
+        "os"
+        "strconv"
+        "strings"
+)
+
+// For the proc file format details,
+// see https://elixir.bootlin.com/linux/v4.17/source/net/unix/af_unix.c#L2815
+// and https://elixir.bootlin.com/linux/latest/source/include/uapi/linux/net.h#L48.
+
+const (
+        netUnixKernelPtrIdx = iota
+        netUnixRefCountIdx
+        _
+        netUnixFlagsIdx
+        netUnixTypeIdx
+        netUnixStateIdx
+        netUnixInodeIdx
+
+        // Inode and Path are optional.
+        netUnixStaticFieldsCnt = 6
+)
+
+const (
+        netUnixTypeStream    = 1
+        netUnixTypeDgram     = 2
+        netUnixTypeSeqpacket = 5
+
+        netUnixFlagListen = 1 << 16
+
+        netUnixStateUnconnected  = 1
+        netUnixStateConnecting   = 2
+        netUnixStateConnected    = 3
+        netUnixStateDisconnected = 4
+)
+
+var errInvalidKernelPtrFmt = errors.New("Invalid Num(the kernel table slot number) format")
+
+// NetUnixType is the type of the type field.
+type NetUnixType uint64
+
+// NetUnixFlags is the type of the flags field.
+type NetUnixFlags uint64
+
+// NetUnixState is the type of the state field.
+type NetUnixState uint64
+
+// NetUnixLine represents a line of /proc/net/unix.
+type NetUnixLine struct {
+        KernelPtr string
+        RefCount  uint64
+        Protocol  uint64
+        Flags     NetUnixFlags
+        Type      NetUnixType
+        State     NetUnixState
+        Inode     uint64
+        Path      string
+}
+
+// NetUnix holds the data read from /proc/net/unix.
+type NetUnix struct {
+        Rows []*NetUnixLine
+}
+
+// NewNetUnix returns data read from /proc/net/unix.
+func NewNetUnix() (*NetUnix, error) {
+        fs, err := NewFS(DefaultMountPoint)
+        if err != nil {
+                return nil, err
+        }
+
+        return fs.NewNetUnix()
+}
+
+// NewNetUnix returns data read from /proc/net/unix.
+func (fs FS) NewNetUnix() (*NetUnix, error) {
+        return NewNetUnixByPath(fs.proc.Path("net/unix"))
+}
+
+// NewNetUnixByPath returns data read from /proc/net/unix by file path.
+// It might returns an error with partial parsed data, if an error occur after some data parsed.
+func NewNetUnixByPath(path string) (*NetUnix, error) {
+        f, err := os.Open(path)
+        if err != nil {
+                return nil, err
+        }
+        defer f.Close()
+        return NewNetUnixByReader(f)
+}
+
+// NewNetUnixByReader returns data read from /proc/net/unix by a reader.
+// It might returns an error with partial parsed data, if an error occur after some data parsed.
+func NewNetUnixByReader(reader io.Reader) (*NetUnix, error) {
+        nu := &NetUnix{
+                Rows: make([]*NetUnixLine, 0, 32),
+        }
+        scanner := bufio.NewScanner(reader)
+        // Omit the header line.
+        scanner.Scan()
+        header := scanner.Text()
+        // From the man page of proc(5), it does not contain an Inode field,
+        // but in actually it exists.
+        // This code works for both cases.
+        hasInode := strings.Contains(header, "Inode")
+
+        minFieldsCnt := netUnixStaticFieldsCnt
+        if hasInode {
+                minFieldsCnt++
+        }
+        for scanner.Scan() {
+                line := scanner.Text()
+                item, err := nu.parseLine(line, hasInode, minFieldsCnt)
+                if err != nil {
+                        return nu, err
+                }
+                nu.Rows = append(nu.Rows, item)
+        }
+
+        return nu, scanner.Err()
+}
+
+func (u *NetUnix) parseLine(line string, hasInode bool, minFieldsCnt int) (*NetUnixLine, error) {
+        fields := strings.Fields(line)
+        fieldsLen := len(fields)
+        if fieldsLen < minFieldsCnt {
+                return nil, fmt.Errorf(
+                        "Parse Unix domain failed: expect at least %d fields but got %d",
+                        minFieldsCnt, fieldsLen)
+        }
+        kernelPtr, err := u.parseKernelPtr(fields[netUnixKernelPtrIdx])
+        if err != nil {
+                return nil, fmt.Errorf("Parse Unix domain num(%s) failed: %s", fields[netUnixKernelPtrIdx], err)
+        }
+        users, err := u.parseUsers(fields[netUnixRefCountIdx])
+        if err != nil {
+                return nil, fmt.Errorf("Parse Unix domain ref count(%s) failed: %s", fields[netUnixRefCountIdx], err)
+        }
+        flags, err := u.parseFlags(fields[netUnixFlagsIdx])
+        if err != nil {
+                return nil, fmt.Errorf("Parse Unix domain flags(%s) failed: %s", fields[netUnixFlagsIdx], err)
+        }
+        typ, err := u.parseType(fields[netUnixTypeIdx])
+        if err != nil {
+                return nil, fmt.Errorf("Parse Unix domain type(%s) failed: %s", fields[netUnixTypeIdx], err)
+        }
+        state, err := u.parseState(fields[netUnixStateIdx])
+        if err != nil {
+                return nil, fmt.Errorf("Parse Unix domain state(%s) failed: %s", fields[netUnixStateIdx], err)
+        }
+        var inode uint64
+        if hasInode {
+                inodeStr := fields[netUnixInodeIdx]
+                inode, err = u.parseInode(inodeStr)
+                if err != nil {
+                        return nil, fmt.Errorf("Parse Unix domain inode(%s) failed: %s", inodeStr, err)
+                }
+        }
+
+        nuLine := &NetUnixLine{
+                KernelPtr: kernelPtr,
+                RefCount:  users,
+                Type:      typ,
+                Flags:     flags,
+                State:     state,
+                Inode:     inode,
+        }
+
+        // Path field is optional.
+        if fieldsLen > minFieldsCnt {
+                pathIdx := netUnixInodeIdx + 1
+                if !hasInode {
+                        pathIdx--
+                }
+                nuLine.Path = fields[pathIdx]
+        }
+
+        return nuLine, nil
+}
+
+func (u NetUnix) parseKernelPtr(str string) (string, error) {
+        if !strings.HasSuffix(str, ":") {
+                return "", errInvalidKernelPtrFmt
+        }
+        return str[:len(str)-1], nil
+}
+
+func (u NetUnix) parseUsers(hexStr string) (uint64, error) {
+        return strconv.ParseUint(hexStr, 16, 32)
+}
+
+func (u NetUnix) parseProtocol(hexStr string) (uint64, error) {
+        return strconv.ParseUint(hexStr, 16, 32)
+}
+
+func (u NetUnix) parseType(hexStr string) (NetUnixType, error) {
+        typ, err := strconv.ParseUint(hexStr, 16, 16)
+        if err != nil {
+                return 0, err
+        }
+        return NetUnixType(typ), nil
+}
+
+func (u NetUnix) parseFlags(hexStr string) (NetUnixFlags, error) {
+        flags, err := strconv.ParseUint(hexStr, 16, 32)
+        if err != nil {
+                return 0, err
+        }
+        return NetUnixFlags(flags), nil
+}
+
+func (u NetUnix) parseState(hexStr string) (NetUnixState, error) {
+        st, err := strconv.ParseInt(hexStr, 16, 8)
+        if err != nil {
+                return 0, err
+        }
+        return NetUnixState(st), nil
+}
+
+func (u NetUnix) parseInode(inodeStr string) (uint64, error) {
+        return strconv.ParseUint(inodeStr, 10, 64)
+}
+
+func (t NetUnixType) String() string {
+        switch t {
+        case netUnixTypeStream:
+                return "stream"
+        case netUnixTypeDgram:
+                return "dgram"
+        case netUnixTypeSeqpacket:
+                return "seqpacket"
+        }
+        return "unknown"
+}
+
+func (f NetUnixFlags) String() string {
+        switch f {
+        case netUnixFlagListen:
+                return "listen"
+        default:
+                return "default"
+        }
+}
+
+func (s NetUnixState) String() string {
+        switch s {
+        case netUnixStateUnconnected:
+                return "unconnected"
+        case netUnixStateConnecting:
+                return "connecting"
+        case netUnixStateConnected:
+                return "connected"
+        case netUnixStateDisconnected:
+                return "disconnected"
+        }
+        return "unknown"
+}
diff --git a/vendor/github.com/prometheus/procfs/nfs/parse.go b/vendor/github.com/prometheus/procfs/nfs/parse.go
index 95a83cc..5e78c54 100644
--- a/vendor/github.com/prometheus/procfs/nfs/parse.go
+++ b/vendor/github.com/prometheus/procfs/nfs/parse.go
@@ -118,7 +118,7 @@ func parseClientRPC(v []uint64) (ClientRPC, error) {
 
 func parseV2Stats(v []uint64) (V2Stats, error) {
         values := int(v[0])
-        if len(v[1:]) != values || values != 18 {
+        if len(v[1:]) != values || values < 18 {
                 return V2Stats{}, fmt.Errorf("invalid V2Stats line %q", v)
         }
 
@@ -146,7 +146,7 @@ func parseV2Stats(v []uint64) (V2Stats, error) {
 
 func parseV3Stats(v []uint64) (V3Stats, error) {
         values := int(v[0])
-        if len(v[1:]) != values || values != 22 {
+        if len(v[1:]) != values || values < 22 {
                 return V3Stats{}, fmt.Errorf("invalid V3Stats line %q", v)
         }
 
diff --git a/vendor/github.com/prometheus/procfs/proc_ns.go b/vendor/github.com/prometheus/procfs/proc_ns.go
index d06c26e..3f8d6d6 100644
--- a/vendor/github.com/prometheus/procfs/proc_ns.go
+++ b/vendor/github.com/prometheus/procfs/proc_ns.go
@@ -29,7 +29,7 @@ type Namespace struct {
 // Namespaces contains all of the namespaces that the process is contained in.
 type Namespaces map[string]Namespace
 
-// NewNamespaces reads from /proc/[pid/ns/* to get the namespaces of which the
+// NewNamespaces reads from /proc/<pid>/ns/* to get the namespaces of which the
 // process is a member.
 func (p Proc) NewNamespaces() (Namespaces, error) {
         d, err := os.Open(p.path("ns"))
diff --git a/vendor/github.com/prometheus/procfs/proc_status.go b/vendor/github.com/prometheus/procfs/proc_status.go
new file mode 100644
index 0000000..6b4b61f
--- /dev/null
+++ b/vendor/github.com/prometheus/procfs/proc_status.go
@@ -0,0 +1,162 @@
+// Copyright 2018 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package procfs
+
+import (
+        "bytes"
+        "io/ioutil"
+        "os"
+        "strconv"
+        "strings"
+)
+
+// ProcStat provides status information about the process,
+// read from /proc/[pid]/stat.
+type ProcStatus struct {
+        // The process ID.
+        PID int
+        // The process name.
+        Name string
+
+        // Peak virtual memory size.
+        VmPeak uint64
+        // Virtual memory size.
+        VmSize uint64
+        // Locked memory size.
+        VmLck uint64
+        // Pinned memory size.
+        VmPin uint64
+        // Peak resident set size.
+        VmHWM uint64
+        // Resident set size (sum of RssAnnon RssFile and RssShmem).
+        VmRSS uint64
+        // Size of resident anonymous memory.
+        RssAnon uint64
+        // Size of resident file mappings.
+        RssFile uint64
+        // Size of resident shared memory.
+        RssShmem uint64
+        // Size of data segments.
+        VmData uint64
+        // Size of stack segments.
+        VmStk uint64
+        // Size of text segments.
+        VmExe uint64
+        // Shared library code size.
+        VmLib uint64
+        // Page table entries size.
+        VmPTE uint64
+        // Size of second-level page tables.
+        VmPMD uint64
+        // Swapped-out virtual memory size by anonymous private.
+        VmSwap uint64
+        // Size of hugetlb memory portions
+        HugetlbPages uint64
+
+        // Number of voluntary context switches.
+        VoluntaryCtxtSwitches uint64
+        // Number of involuntary context switches.
+        NonVoluntaryCtxtSwitches uint64
+}
+
+// NewStatus returns the current status information of the process.
+func (p Proc) NewStatus() (ProcStatus, error) {
+        f, err := os.Open(p.path("status"))
+        if err != nil {
+                return ProcStatus{}, err
+        }
+        defer f.Close()
+
+        data, err := ioutil.ReadAll(f)
+        if err != nil {
+                return ProcStatus{}, err
+        }
+
+        s := ProcStatus{PID: p.PID}
+
+        lines := strings.Split(string(data), "\n")
+        for _, line := range lines {
+                if !bytes.Contains([]byte(line), []byte(":")) {
+                        continue
+                }
+
+                kv := strings.SplitN(line, ":", 2)
+
+                // removes spaces
+                k := string(strings.TrimSpace(kv[0]))
+                v := string(strings.TrimSpace(kv[1]))
+                // removes "kB"
+                v = string(bytes.Trim([]byte(v), " kB"))
+
+                // value to int when possible
+                // we can skip error check here, 'cause vKBytes is not used when value is a string
+                vKBytes, _ := strconv.ParseUint(v, 10, 64)
+                // convert kB to B
+                vBytes := vKBytes * 1024
+
+                s.fillStatus(k, v, vKBytes, vBytes)
+        }
+
+        return s, nil
+}
+
+func (s *ProcStatus) fillStatus(k string, vString string, vUint uint64, vUintBytes uint64) {
+        switch k {
+        case "Name":
+                s.Name = vString
+        case "VmPeak":
+                s.VmPeak = vUintBytes
+        case "VmSize":
+                s.VmSize = vUintBytes
+        case "VmLck":
+                s.VmLck = vUintBytes
+        case "VmPin":
+                s.VmPin = vUintBytes
+        case "VmHWM":
+                s.VmHWM = vUintBytes
+        case "VmRSS":
+                s.VmRSS = vUintBytes
+        case "RssAnon":
+                s.RssAnon = vUintBytes
+        case "RssFile":
+                s.RssFile = vUintBytes
+        case "RssShmem":
+                s.RssShmem = vUintBytes
+        case "VmData":
+                s.VmData = vUintBytes
+        case "VmStk":
+                s.VmStk = vUintBytes
+        case "VmExe":
+                s.VmExe = vUintBytes
+        case "VmLib":
+                s.VmLib = vUintBytes
+        case "VmPTE":
+                s.VmPTE = vUintBytes
+        case "VmPMD":
+                s.VmPMD = vUintBytes
+        case "VmSwap":
+                s.VmSwap = vUintBytes
+        case "HugetlbPages":
+                s.HugetlbPages = vUintBytes
+        case "voluntary_ctxt_switches":
+                s.VoluntaryCtxtSwitches = vUint
+        case "nonvoluntary_ctxt_switches":
+                s.NonVoluntaryCtxtSwitches = vUint
+        }
+}
+
+// TotalCtxtSwitches returns the total context switch.
+func (s ProcStatus) TotalCtxtSwitches() uint64 {
+        return s.VoluntaryCtxtSwitches + s.NonVoluntaryCtxtSwitches
+}
diff --git a/vendor/github.com/prometheus/procfs/sysfs/clocksource.go b/vendor/github.com/prometheus/procfs/sysfs/clocksource.go
new file mode 100644
index 0000000..d96c389
--- /dev/null
+++ b/vendor/github.com/prometheus/procfs/sysfs/clocksource.go
@@ -0,0 +1,76 @@
+// Copyright 2019 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// +build !windows
+
+package sysfs
+
+import (
+        "path/filepath"
+        "strings"
+
+        "github.com/prometheus/procfs/internal/util"
+)
+
+// ClockSource contains metrics related to the clock source
+type ClockSource struct {
+        Name      string
+        Available []string
+        Current   string
+}
+
+// ClockSources returns clocksource information including current and available clocksources
+// read from '/sys/devices/system/clocksource'
+func (fs FS) ClockSources() ([]ClockSource, error) {
+
+        clocksourcePaths, err := filepath.Glob(fs.sys.Path("devices/system/clocksource/clocksource[0-9]*"))
+        if err != nil {
+                return nil, err
+        }
+
+        clocksources := make([]ClockSource, len(clocksourcePaths))
+        for i, clocksourcePath := range clocksourcePaths {
+                clocksourceName := strings.TrimPrefix(filepath.Base(clocksourcePath), "clocksource")
+
+                clocksource, err := parseClocksource(clocksourcePath)
+                if err != nil {
+                        return nil, err
+                }
+                clocksource.Name = clocksourceName
+                clocksources[i] = *clocksource
+        }
+
+        return clocksources, nil
+}
+
+func parseClocksource(clocksourcePath string) (*ClockSource, error) {
+
+        stringFiles := []string{
+                "available_clocksource",
+                "current_clocksource",
+        }
+        stringOut := make([]string, len(stringFiles))
+        var err error
+
+        for i, f := range stringFiles {
+                stringOut[i], err = util.SysReadFile(filepath.Join(clocksourcePath, f))
+                if err != nil {
+                        return &ClockSource{}, err
+                }
+        }
+
+        return &ClockSource{
+                Available: strings.Fields(stringOut[0]),
+                Current:   stringOut[1],
+        }, nil
+}
diff --git a/vendor/github.com/prometheus/procfs/ttar b/vendor/github.com/prometheus/procfs/ttar
index b0171a1..19ef02b 100644
--- a/vendor/github.com/prometheus/procfs/ttar
+++ b/vendor/github.com/prometheus/procfs/ttar
@@ -86,8 +86,10 @@ Usage:   $bname [-C <DIR>] -c -f <ARCHIVE> <FILE...> (create archive)
          $bname [-C <DIR>] -x -f <ARCHIVE>           (extract archive)
 
 Options:
-         -C <DIR>                                    (change directory)
-         -v                                          (verbose)
+         -C <DIR>           (change directory)
+         -v                 (verbose)
+         --recursive-unlink (recursively delete existing directory if path
+                             collides with file or directory to extract)
 
 Example: Change to sysfs directory, create ttar file from fixtures directory
          $bname -C sysfs -c -f sysfs/fixtures.ttar fixtures/
@@ -111,8 +113,9 @@ function set_cmd {
 }
 
 unset VERBOSE
+unset RECURSIVE_UNLINK
 
-while getopts :cf:htxvC: opt; do
+while getopts :cf:-:htxvC: opt; do
     case $opt in
         c)
             set_cmd "create"
@@ -136,6 +139,18 @@ while getopts :cf:htxvC: opt; do
         C)
             CDIR=$OPTARG
             ;;
+        -)
+            case $OPTARG in
+                recursive-unlink)
+                    RECURSIVE_UNLINK="yes"
+                    ;;
+                *)
+                    echo -e "Error: invalid option -$OPTARG"
+                    echo
+                    usage 1
+                    ;;
+            esac
+            ;;
         *)
             echo >&2 "ERROR: invalid option -$OPTARG"
             echo
@@ -212,16 +227,16 @@ function extract {
         local eof_without_newline
         if [ "$size" -gt 0 ]; then
             if [[ "$line" =~ [^\\]EOF ]]; then
-                # An EOF not preceeded by a backslash indicates that the line
+                # An EOF not preceded by a backslash indicates that the line
                 # does not end with a newline
                 eof_without_newline=1
             else
                 eof_without_newline=0
             fi
             # Replace NULLBYTE with null byte if at beginning of line
-            # Replace NULLBYTE with null byte unless preceeded by backslash
+            # Replace NULLBYTE with null byte unless preceded by backslash
             # Remove one backslash in front of NULLBYTE (if any)
-            # Remove EOF unless preceeded by backslash
+            # Remove EOF unless preceded by backslash
             # Remove one backslash in front of EOF
             if [ $USE_PYTHON -eq 1 ]; then
                 echo -n "$line" | python -c "$PYTHON_EXTRACT_FILTER" >> "$path"
@@ -245,7 +260,16 @@ function extract {
         fi
         if [[ $line =~ ^Path:\ (.*)$ ]]; then
             path=${BASH_REMATCH[1]}
-            if [ -e "$path" ] || [ -L "$path" ]; then
+            if [ -L "$path" ]; then
+                rm "$path"
+            elif [ -d "$path" ]; then
+                if [ "${RECURSIVE_UNLINK:-}" == "yes" ]; then
+                    rm -r "$path"
+                else
+                    # Safe because symlinks to directories are dealt with above
+                    rmdir "$path"
+                fi
+            elif [ -e "$path" ]; then
                 rm "$path"
             fi
         elif [[ $line =~ ^Lines:\ (.*)$ ]]; then
@@ -338,8 +362,8 @@ function _create {
             else
                 < "$file" \
                     sed 's/EOF/\\EOF/g;
-                         s/NULLBYTE/\\NULLBYTE/g;
-                         s/\x0/NULLBYTE/g;
+                            s/NULLBYTE/\\NULLBYTE/g;
+                            s/\x0/NULLBYTE/g;
                     '
             fi
             if [[ "$eof_without_newline" -eq 1 ]]; then
diff --git a/vendor/modules.txt b/vendor/modules.txt
index c32c57d..9cc4173 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -45,7 +45,7 @@ github.com/prometheus/common/version
 github.com/prometheus/common/expfmt
 github.com/prometheus/common/model
 github.com/prometheus/common/internal/bitbucket.org/ww/goautoneg
-# github.com/prometheus/procfs v0.0.0-20190507043628-bc6930f2d510
+# github.com/prometheus/procfs v0.0.0-20190529155944-65bdadfa96ae
 github.com/prometheus/procfs
 github.com/prometheus/procfs/bcache
 github.com/prometheus/procfs/nfs