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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1 @@ | ||
| kill_process kill_thread trap errno user_notif trace log allow |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,218 @@ | ||
| // Copyright 2022 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" | ||
| "strconv" | ||
| "strings" | ||
|
|
||
| "github.com/go-kit/log" | ||
| "github.com/prometheus/client_golang/prometheus" | ||
| "github.com/prometheus/procfs" | ||
| "gopkg.in/alecthomas/kingpin.v2" | ||
| ) | ||
|
|
||
| var ( | ||
| sysctlInclude = kingpin.Flag("collector.sysctl.include", "Select sysctl metrics to include").Strings() | ||
| sysctlIncludeInfo = kingpin.Flag("collector.sysctl.include-info", "Select sysctl metrics to include as info metrics").Strings() | ||
|
|
||
| sysctlInfoDesc = prometheus.NewDesc(prometheus.BuildFQName(namespace, "sysctl", "info"), "sysctl info", []string{"name", "value", "index"}, nil) | ||
| ) | ||
|
|
||
| type sysctlCollector struct { | ||
| fs procfs.FS | ||
| logger log.Logger | ||
| sysctls []*Sysctl | ||
| } | ||
|
|
||
| func init() { | ||
| registerCollector("sysctl", defaultEnabled, NewSysctlCollector) | ||
| } | ||
|
|
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| func NewSysctlCollector(logger log.Logger) (Collector, error) { | ||
| fs, err := procfs.NewFS(*procPath) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("failed to open sysfs: %w", err) | ||
| } | ||
| c := &sysctlCollector{ | ||
| logger: logger, | ||
| fs: fs, | ||
| sysctls: []*Sysctl{}, | ||
| } | ||
|
|
||
| for _, include := range *sysctlInclude { | ||
| sysctl, err := NewSysctl(include, true) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| c.sysctls = append(c.sysctls, sysctl) | ||
| } | ||
|
|
||
| for _, include := range *sysctlIncludeInfo { | ||
| sysctl, err := NewSysctl(include, false) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| c.sysctls = append(c.sysctls, sysctl) | ||
| } | ||
| return c, nil | ||
| } | ||
|
|
||
| func (c *sysctlCollector) Update(ch chan<- prometheus.Metric) error { | ||
| for _, sysctl := range c.sysctls { | ||
| metrics, err := c.NewMetrics(sysctl) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| for _, metric := range metrics { | ||
| ch <- metric | ||
| } | ||
| } | ||
| return nil | ||
| } | ||
|
|
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| func (c *sysctlCollector) NewMetrics(sysctl *Sysctl) ([]prometheus.Metric, error) { | ||
| var ( | ||
| values interface{} | ||
| length int | ||
| err error | ||
| ) | ||
|
|
||
| if sysctl.numeric { | ||
| values, err = c.fs.SysctlInts(sysctl.name) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("error obtaining sysctl info: %w", err) | ||
| } | ||
| length = len(values.([]int)) | ||
| } else { | ||
| values, err = c.fs.SysctlStrings(sysctl.name) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("error obtaining sysctl info: %w", err) | ||
| } | ||
| length = len(values.([]string)) | ||
| } | ||
|
|
||
| switch length { | ||
| case 0: | ||
| return nil, fmt.Errorf("sysctl %s has no values", sysctl.name) | ||
| case 1: | ||
| if len(sysctl.keys) > 0 { | ||
| return nil, fmt.Errorf("sysctl %s has only one value, but expected %v", sysctl.name, sysctl.keys) | ||
| } | ||
| return []prometheus.Metric{sysctl.NewConstMetric(values)}, nil | ||
|
|
||
| default: | ||
|
|
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| if len(sysctl.keys) == 0 { | ||
| return sysctl.NewIndexedMetrics(values), nil | ||
| } | ||
|
|
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| if length != len(sysctl.keys) { | ||
| return nil, fmt.Errorf("sysctl %s has %d keys but only %d defined in f lag", sysctl.name, length, len(sysctl.keys)) | ||
| } | ||
|
|
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| return sysctl.NewMappedMetrics(values) | ||
| } | ||
| } | ||
|
|
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| type Sysctl struct { | ||
| numeric bool | ||
| name string | ||
| keys []string | ||
| } | ||
|
|
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| func NewSysctl(include string, numeric bool) (*Sysctl, error) { | ||
| parts := strings.SplitN(include, ":", 2) | ||
| s := &Sysctl{ | ||
| numeric: numeric, | ||
| name: parts[0], | ||
| } | ||
| if len(parts) == 2 { | ||
| s.keys = strings.Split(parts[1], ",") | ||
| s.name = parts[0] | ||
| } | ||
| return s, nil | ||
| } | ||
|
|
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| func (sysctl *Sysctl) MetricName() string { | ||
| return SanitizeMetricName(sysctl.name) | ||
| } | ||
|
|
||
| func (sysctl *Sysctl) NewConstMetric(v interface{}) prometheus.Metric { | ||
| if sysctl.numeric { | ||
| return prometheus.MustNewConstMetric( | ||
| prometheus.NewDesc( | ||
| prometheus.BuildFQName(namespace, "sysctl", sysctl.MetricName()), | ||
| fmt.Sprintf("sysctl %s", sysctl.name), | ||
| nil, nil), | ||
| prometheus.UntypedValue, | ||
| float64(v.([]int)[0])) | ||
| } | ||
| return prometheus.MustNewConstMetric( | ||
| sysctlInfoDesc, | ||
| prometheus.UntypedValue, | ||
| 1.0, | ||
| sysctl.name, | ||
| v.([]string)[0], | ||
| "0", | ||
| ) | ||
| } | ||
|
|
||
| func (sysctl *Sysctl) NewIndexedMetrics(v interface{}) []prometheus.Metric { | ||
| desc := prometheus.NewDesc( | ||
| prometheus.BuildFQName(namespace, "sysctl", sysctl.MetricName()), | ||
| fmt.Sprintf("sysctl %s", sysctl.name), | ||
| []string{"index"}, nil, | ||
| ) | ||
| switch values := v.(type) { | ||
| case []int: | ||
| metrics := make([]prometheus.Metric, len(values)) | ||
| for i, n := range values { | ||
| metrics[i] = prometheus.MustNewConstMetric(desc, prometheus.UntypedValue, float64(n), strconv.Itoa(i)) | ||
| } | ||
| return metrics | ||
| case []string: | ||
| metrics := make([]prometheus.Metric, len(values)) | ||
| for i, str := range values { | ||
| metrics[i] = prometheus.MustNewConstMetric(sysctlInfoDesc, prometheus.UntypedValue, 1.0, sysctl.name, str, strconv.Itoa(i)) | ||
| } | ||
| return metrics | ||
| default: | ||
| panic(fmt.Sprintf("unexpected type %T", values)) | ||
| } | ||
| } | ||
|
|
||
| func (sysctl *Sysctl) NewMappedMetrics(v interface{}) ([]prometheus.Metric, error) { | ||
| switch values := v.(type) { | ||
| case []int: | ||
| metrics := make([]prometheus.Metric, len(values)) | ||
| for i, n := range values { | ||
| key := sysctl.keys[i] | ||
| desc := prometheus.NewDesc( | ||
| prometheus.BuildFQName(namespace, "sysctl", sysctl.MetricName()+"_"+key), | ||
| fmt.Sprintf("sysctl %s, field %d", sysctl.name, i), | ||
| nil, | ||
| nil, | ||
| ) | ||
| metrics[i] = prometheus.MustNewConstMetric(desc, prometheus.UntypedValue, float64(n)) | ||
| } | ||
| return metrics, nil | ||
| case []string: | ||
| return nil, fmt.Errorf("mapped sysctl string values not supported") | ||
| default: | ||
| return nil, fmt.Errorf("unexpected type %T", values) | ||
| } | ||
| } |
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