Node_Exporter/collector/nfs_linux.go

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// Copyright 2016 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 collector
import (
"fmt"
"os"
"reflect"
"strings"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/common/log"
"github.com/prometheus/procfs"
"github.com/prometheus/procfs/nfs"
)
const (
nfsSubsystem = "nfs"
)
type nfsCollector struct {
fs procfs.FS
nfsNetReadsDesc *prometheus.Desc
nfsNetConnectionsDesc *prometheus.Desc
nfsRPCOperationsDesc *prometheus.Desc
nfsRPCRetransmissionsDesc *prometheus.Desc
nfsRPCAuthenticationRefreshesDesc *prometheus.Desc
nfsProceduresDesc *prometheus.Desc
}
func init() {
registerCollector("nfs", defaultDisabled, NewNfsCollector)
}
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// NewNfsCollector returns a new Collector exposing NFS statistics.
func NewNfsCollector() (Collector, error) {
fs, err := procfs.NewFS(*procPath)
if err != nil {
return nil, fmt.Errorf("failed to open procfs: %v", err)
}
return &nfsCollector{
fs: fs,
nfsNetReadsDesc: prometheus.NewDesc(
prometheus.BuildFQName(namespace, nfsSubsystem, "net_reads_total"),
"Number of reads at the network layer.",
[]string{"protocol"},
nil,
),
nfsNetConnectionsDesc: prometheus.NewDesc(
prometheus.BuildFQName(namespace, nfsSubsystem, "net_connections_total"),
"Number of connections at the network layer.",
[]string{"protocol"},
nil,
),
nfsRPCOperationsDesc: prometheus.NewDesc(
prometheus.BuildFQName(namespace, nfsSubsystem, "rpc_operations_total"),
"Number of RPCs performed.",
nil,
nil,
),
nfsRPCRetransmissionsDesc: prometheus.NewDesc(
prometheus.BuildFQName(namespace, nfsSubsystem, "rpc_retransmissions_total"),
"Number of RPC transmissions performed.",
nil,
nil,
),
nfsRPCAuthenticationRefreshesDesc: prometheus.NewDesc(
prometheus.BuildFQName(namespace, nfsSubsystem, "rpc_authentication_refreshes_total"),
"Number of RPC authentication refreshes performed.",
nil,
nil,
),
nfsProceduresDesc: prometheus.NewDesc(
prometheus.BuildFQName(namespace, "nfs", "procedures_total"),
"Number of NFS procedures invoked.",
[]string{"version", "procedure"},
nil,
),
}, nil
}
func (c *nfsCollector) Update(ch chan<- prometheus.Metric) error {
stats, err := c.fs.NFSClientRPCStats()
if err != nil {
if os.IsNotExist(err) {
log.Debugf("Not collecting NFS metrics: %s", err)
return nil
}
return fmt.Errorf("failed to retrieve nfs stats: %v", err)
}
c.updateNFSNetworkStats(ch, &stats.Network)
c.updateNFSClientRPCStats(ch, &stats.ClientRPC)
c.updateNFSRequestsv2Stats(ch, &stats.V2Stats)
c.updateNFSRequestsv3Stats(ch, &stats.V3Stats)
c.updateNFSRequestsv4Stats(ch, &stats.ClientV4Stats)
return nil
}
// updateNFSNetworkStats collects statistics for network packets/connections.
func (c *nfsCollector) updateNFSNetworkStats(ch chan<- prometheus.Metric, s *nfs.Network) {
ch <- prometheus.MustNewConstMetric(c.nfsNetReadsDesc, prometheus.CounterValue,
float64(s.UDPCount), "udp")
ch <- prometheus.MustNewConstMetric(c.nfsNetReadsDesc, prometheus.CounterValue,
float64(s.TCPCount), "tcp")
ch <- prometheus.MustNewConstMetric(c.nfsNetConnectionsDesc, prometheus.CounterValue,
float64(s.TCPConnect), "tcp")
}
// updateNFSClientRPCStats collects statistics for kernel server RPCs.
func (c *nfsCollector) updateNFSClientRPCStats(ch chan<- prometheus.Metric, s *nfs.ClientRPC) {
ch <- prometheus.MustNewConstMetric(c.nfsRPCOperationsDesc, prometheus.CounterValue,
float64(s.RPCCount))
ch <- prometheus.MustNewConstMetric(c.nfsRPCRetransmissionsDesc, prometheus.CounterValue,
float64(s.Retransmissions))
ch <- prometheus.MustNewConstMetric(c.nfsRPCAuthenticationRefreshesDesc, prometheus.CounterValue,
float64(s.AuthRefreshes))
}
// updateNFSRequestsv2Stats collects statistics for NFSv2 requests.
func (c *nfsCollector) updateNFSRequestsv2Stats(ch chan<- prometheus.Metric, s *nfs.V2Stats) {
const proto = "2"
v := reflect.ValueOf(s).Elem()
for i := 0; i < v.NumField(); i++ {
field := v.Field(i)
name := strings.ToLower(v.Type().Field(i).Name)
switch name {
case "wrcache":
name = "writecache"
case "fsstat":
name = "statfs"
}
ch <- prometheus.MustNewConstMetric(c.nfsProceduresDesc, prometheus.CounterValue,
float64(field.Uint()), proto, name)
}
}
// updateNFSRequestsv3Stats collects statistics for NFSv3 requests.
func (c *nfsCollector) updateNFSRequestsv3Stats(ch chan<- prometheus.Metric, s *nfs.V3Stats) {
const proto = "3"
v := reflect.ValueOf(s).Elem()
for i := 0; i < v.NumField(); i++ {
field := v.Field(i)
name := strings.ToLower(v.Type().Field(i).Name)
ch <- prometheus.MustNewConstMetric(c.nfsProceduresDesc, prometheus.CounterValue,
float64(field.Uint()), proto, name)
}
}
// updateNFSRequestsv4Stats collects statistics for NFSv4 requests.
func (c *nfsCollector) updateNFSRequestsv4Stats(ch chan<- prometheus.Metric, s *nfs.ClientV4Stats) {
const proto = "4"
v := reflect.ValueOf(s).Elem()
for i := 0; i < v.NumField(); i++ {
field := v.Field(i)
name := strings.ToLower(v.Type().Field(i).Name)
switch name {
case "openconfirm":
name = "open_confirm"
case "opendowngrade":
name = "open_downgrade"
case "opennoattr":
name = "open_noattr"
case "setclientidconfirm":
name = "setclientid_confirm"
case "lookuproot":
name = "lookup_root"
case "servercaps":
name = "server_caps"
case "fslocations":
name = "fs_locations"
case "releaselockowner":
name = "release_lockowner"
case "fsidpresent":
name = "fsid_present"
case "exchangeid":
name = "exchange_id"
case "createsession":
name = "create_session"
case "destroysession":
name = "destroy_session"
case "getleasetime":
name = "get_lease_time"
case "reclaimcomplete":
name = "reclaim_complete"
// TODO: Enable these metrics
case "secinfononame", "teststateid", "freestateid", "getdevicelist", "bindconntosession", "destroyclientid", "seek", "allocate", "deallocate", "layoutstats", "clone":
continue
}
ch <- prometheus.MustNewConstMetric(c.nfsProceduresDesc, prometheus.CounterValue,
float64(field.Uint()), proto, name)
}
}