Skip to content

Commit

Permalink
Merge pull request #18 from Alb0t/ala-breaking-change-move-to-prom-hi…
Browse files Browse the repository at this point in the history 
…stograms

- move system to using histograms
- drop % distributions since that can be figured out
- update libs
- `runtime.GOMAXPROCS(1)`. Can this be overridden by env runtime I wonder? Let's see if it causes problems.. but ideally I want this to take very little resources.
- kill unit specification and division voodoo. make the user do this at query time and just export seconds.
  • Loading branch information
@Alb0t
Alb0t authored Jul 24, 2023
2 parents 396cf01 + 36da187 commit 2b3495a
Show file tree
Hide file tree
Showing 7 changed files with 276 additions and 473 deletions.
134 changes: 33 additions & 101 deletions README.md
View file
Original file line number Diff line number Diff line change
Expand Up @@ -3,7 +3,7 @@
A prometheus exporter than scans record ttl for Aerospike and exports it.

# The problem:
tl;dr - this allows us to measure storage capacity in a situation where we store until eviction.
tl;dr - this allows us to measure storage capacity in a situation where we store data until eviction, or we want to understand the distribution of TTLs better within a system and monitor that over time.

TTL (time-to-live) on a record dictates when the record will expire, and if evicting we need to measure the lowest bucket and trends of these ttls.

Expand All @@ -15,89 +15,33 @@ The data currently exported by Aerospike histogram dumps is not accurate enough

Example output:
```
# HELP aerospike_ttl_build_info Build info
# TYPE aerospike_ttl_build_info gauge
aerospike_ttl_build_info{version="0.2.0"} 1
# HELP aerospike_ttl_percents Time in which this many records will expire. Sampled locally. Shows percentages of how many records were found in each bucket vs total records scanned.
# TYPE aerospike_ttl_percents gauge
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="140"} 1.16
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="141"} 1.902
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="142"} 1.56
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="143"} 1.812
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="144"} 1.7
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="145"} 1.624
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="146"} 1.896
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="147"} 2.14
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="148"} 1.468
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="149"} 1.894
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="150"} 2.054
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="151"} 1.86
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="152"} 1.722
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="153"} 1.758
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="154"} 1.928
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="155"} 1.99
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="156"} 1.796
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="157"} 1.898
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="158"} 1.882
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="159"} 1.918
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="160"} 2.954
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="161"} 1.93
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="162"} 2.186
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="163"} 2.112
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="164"} 2.6
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="165"} 2.544
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="166"} 3.028
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="167"} 2.942
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="168"} 4.542
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="169"} 2.988
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="170"} 2.584
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="171"} 2.744
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="172"} 3.05
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="173"} 2.206
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="174"} 2.84
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="175"} 3.866
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="176"} 3.932
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="177"} 2.54
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="178"} 2.218
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="179"} 2.154
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="180"} 0.088
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="181"} 0.052
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="182"} 0.172
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="183"} 0.248
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="184"} 0.136
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="185"} 0.09
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="186"} 0.08
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="187"} 0.112
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="188"} 0.098
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="189"} 0.142
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="190"} 0.166
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="191"} 0.178
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="192"} 0.078
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="193"} 0.09
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="194"} 0.108
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="195"} 0.124
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="196"} 0.072
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="197"} 0.204
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="198"} 0.31
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="199"} 0.118
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="200"} 0.136
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="201"} 0.156
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="202"} 0.214
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="203"} 0.228
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="204"} 0.314
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="205"} 0.21
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="206"} 0.342
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="207"} 0.31
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="208"} 0.56
aerospike_ttl_percents{exportType="days",namespace="mynamespace",set="User",ttl="209"} 2.942
aerospike_ttl_percents{exportType="totalScanned",namespace="mynamespace",set="User",ttl="total"} 50000
# HELP aerospike_ttl_scan_last_updated Epoch time that scan last finished.
# TYPE aerospike_ttl_scan_last_updated gauge
aerospike_ttl_scan_last_updated{namespace="mynamespace",set="User"} 1.573758691e+09
# HELP aerospike_ttl_scan_minutes Scan times in minutes.
# TYPE aerospike_ttl_scan_minutes gauge
aerospike_ttl_scan_minutes{namespace="mynamespace",set="User"} 0.21666666666666667
....
aerospike_expiration_ttl_counts_hist_bucket{namespace="myOtherNS",set="",le="1.79712e+08"} 70028
aerospike_expiration_ttl_counts_hist_bucket{namespace="myOtherNS",set="",le="1.80576e+08"} 70028
aerospike_expiration_ttl_counts_hist_bucket{namespace="myOtherNS",set="",le="+Inf"} 70028
aerospike_expiration_ttl_counts_hist_sum{namespace="myOtherNS",set=""} 3.68036698307e+11
aerospike_expiration_ttl_counts_hist_count{namespace="myOtherNS",set=""} 70028
aerospike_expiration_ttl_counts_hist_bucket{namespace="myNS",set="Beans",le="1.3824e+07"} 145142
aerospike_expiration_ttl_counts_hist_bucket{namespace="myNS",set="Beans",le="1.4688e+07"} 186596
aerospike_expiration_ttl_counts_hist_bucket{namespace="myNS",set="Beans",le="1.56384e+07"} 223357
aerospike_expiration_ttl_counts_hist_bucket{namespace="myNS",set="Beans",le="1.9008e+07"} 241662
aerospike_expiration_ttl_counts_hist_bucket{namespace="myNS",set="Beans",le="+Inf"} 241699
aerospike_expiration_ttl_counts_hist_sum{namespace="myNS",set="Beans"} 3.166097393414e+12
aerospike_expiration_ttl_counts_hist_count{namespace="myNS",set="Beans"} 241699
aerospike_expiration_ttl_counts_hist_bucket{namespace="myNS",set="boo",le="1.3824e+07"} 9056
aerospike_expiration_ttl_counts_hist_bucket{namespace="myNS",set="boo",le="1.4688e+07"} 11760
aerospike_expiration_ttl_counts_hist_bucket{namespace="myNS",set="boo",le="1.56384e+07"} 13648
aerospike_expiration_ttl_counts_hist_bucket{namespace="myNS",set="boo",le="1.9008e+07"} 16000
aerospike_expiration_ttl_counts_hist_bucket{namespace="myNS",set="boo",le="+Inf"} 16000
aerospike_expiration_ttl_counts_hist_sum{namespace="myNS",set="boo"} 2.1257415038e+11
aerospike_expiration_ttl_counts_hist_count{namespace="myNS",set="boo"} 16000
aerospike_ttl_build_info{version="3.0.0"} 1
aerospike_ttl_scan_last_updated{namespace="myOtherNS",set=""} 1.690219845e+09
aerospike_ttl_scan_last_updated{namespace="myNS",set="Beans"} 1.690219844e+09
aerospike_ttl_scan_last_updated{namespace="myNS",set="boo"} 1.690219848e+09
aerospike_ttl_scan_time_seconds{namespace="myOtherNS",set=""} 1
aerospike_ttl_scan_time_seconds{namespace="myNS",set="Beans"} 6
aerospike_ttl_scan_time_seconds{namespace="myNS",set="boo"} 1
```

# To use:
Expand Down Expand Up @@ -136,20 +80,8 @@ time="2021-03-23T15:16:09-06:00" level=debug msg="Setting max records to 100 bas

# Notes

These options can be used to configure smaller/larger buckets:
```
exportType string
What label should we give the bucket
exportTypeDivision int
What should we divide by the seconds to get the bucket size?
exportBucketMultiply int
Multiply the bucket value by this before exporting
```

For example, if you wanted 15 minute buckets, you could pass these as:
```
exportType: minutes
exportTypeDivision: 900
exportBucketMultiply: 15
```
This would export things in 15 minute buckets, and report them as 'minutes'
`staticBucketList` and `bucketWidth/numberOfBucketsToExport` are mutually exclusive. You must pick one or the other. Program will fail to start with a fatal log message if you try to specify both.

`staticBucketList` accepts an array of buckets you wish to define for the histogram.

Alternatively, you can use `bucketWidth` `numberOfBucketsToExport` and `bucketStart` to specify a linear histogram.
117 changes: 70 additions & 47 deletions collector.go
View file
Original file line number Diff line number Diff line change
Expand Up @@ -11,32 +11,33 @@ import (
"gopkg.in/yaml.v3"
)

var buildVersion = "2.1.1"
var expirationTTLCounts *prometheus.GaugeVec
var expirationTTLPercents *prometheus.GaugeVec

var buildVersion = "3.0.1"
var configFile = flag.String("configFile", "/etc/ttl-aerospike-exporter.yaml", "The yaml config file for the exporter")
var ns_set_to_histograms = make(map[string]map[string]*prometheus.HistogramVec)

var buildInfo = prometheus.NewGaugeVec(
prometheus.GaugeOpts{
Name: "aerospike_ttl_build_info",
Help: "Build info",
Namespace: "aerospike_ttl",
Name: "build_info",
Help: "Build info",
},
[]string{"version"},
)

var scanTimes = prometheus.NewGaugeVec(
prometheus.GaugeOpts{
Name: "aerospike_ttl_scan_minutes",
Help: "Scan times in minutes.",
Namespace: "aerospike_ttl",
Name: "scan_time_seconds",
Help: "Scan times in seconds.",
},
[]string{"namespace", "set"},
)

var scanLastUpdated = prometheus.NewGaugeVec(
prometheus.GaugeOpts{
Name: "aerospike_ttl_scan_last_updated",
Help: "Epoch time that scan last finished.",
Namespace: "aerospike_ttl",
Name: "scan_last_updated",
Help: "Epoch time that scan last finished.",
},
[]string{"namespace", "set"},
)
Expand Down Expand Up @@ -65,38 +66,36 @@ type serviceConf struct {
}

type monconf struct {
Namespace string `yaml:"namespace"`
Set string `yaml:"set"`
Recordcount int `yaml:"recordCount,omitempty"`
ScanPercent float64 `yaml:"scanPercent,omitempty"`
ExportPercentages bool `yaml:"exportPercentages,omitempty"`
ExportRecordCount bool `yaml:"exportRecordCount,omitempty"`
ExportType string `yaml:"exportType,omitempty"`
ExportTypeDivision uint32 `yaml:"exportTypeDivision,omitempty"`
ExportBucketMultiply uint32 `yaml:"exportBucketMultiply,omitempty"`
ReportCount int `yaml:"reportCount,omitempty"`
ScanTotalTimeout string `yaml:"scanTotalTimeout"`
ScanSocketTimeout string `yaml:"scanSocketTimeout"`
PolicyTotalTimeout string `yaml:"policyTotalTimeout"`
PolicySocketTimeout string `yaml:"policySocketTimeout"`
RecordsPerSecond int `yaml:"recordsPerSecond"`
Namespace string `yaml:"namespace"`
Set string `yaml:"set"`
Recordcount int `yaml:"recordCount,omitempty"`
ScanPercent float64 `yaml:"scanPercent,omitempty"`
NumberOfBucketsToExport int `yaml:"numberOfBucketsToExport,omitempty"`
BucketWidth int `yaml:"bucketWidth,omitempty"`
BucketStart int `yaml:"bucketStart,omitempty"`
StaticBucketList []float64 `yaml:"staticBucketList,omitempty"`
ReportCount int `yaml:"reportCount,omitempty"`
ScanTotalTimeout string `yaml:"scanTotalTimeout"`
ScanSocketTimeout string `yaml:"scanSocketTimeout"`
PolicyTotalTimeout string `yaml:"policyTotalTimeout"`
PolicySocketTimeout string `yaml:"policySocketTimeout"`
RecordsPerSecond int `yaml:"recordsPerSecond"`
}

func (c *conf) getConf() *conf {
func (c *conf) setConf() {
flag.Parse()
yamlFile, err := ioutil.ReadFile(*configFile)
if err != nil {
log.Fatal("Failed to read configfile: ", *configFile)
}
err = yaml.Unmarshal(yamlFile, c)
err = yaml.Unmarshal(yamlFile, c) // This actually writes it back to *conf
if err != nil {
log.Fatal("Failed to unmarshal configfile, bad format? File:", *configFile)
}
return c
}

func init() {
config.getConf()
config.setConf()
log.SetFormatter(&log.TextFormatter{
FullTimestamp: true,
})
Expand All @@ -108,27 +107,51 @@ func init() {
log.SetLevel(log.InfoLevel)
}

expirationTTLPercents = prometheus.NewGaugeVec(
prometheus.GaugeOpts{
Name: "aerospike_ttl_percents",
Help: "Time in which this many records will expire. Sampled locally. Shows percentages of how many records were found in each bucket vs total records scanned.",
},
[]string{"exportType", "ttl", "namespace", "set"},
)

expirationTTLCounts = prometheus.NewGaugeVec(
prometheus.GaugeOpts{
Name: "aerospike_ttl_counts",
Help: "Time in which this many records will expire. Sampled locally. Shows counts of how many records were found in each bucket.",
},
[]string{"exportType", "ttl", "namespace", "set"},
)
prometheus.MustRegister(buildInfo)
// We need to define a histogram for each monconf (ns/set/buckets)
for histogramConfIndex := range config.Monitor {
histogramConf := config.Monitor[histogramConfIndex]
namespace := histogramConf.Namespace
set := histogramConf.Set
var buckets []float64
number_of_buckets := histogramConf.NumberOfBucketsToExport
bucket_width := float64(histogramConf.BucketWidth)
bucket_start := float64(histogramConf.BucketStart)

// buckets definitions
if len(histogramConf.StaticBucketList) > 0 {
if number_of_buckets != 0 || bucket_width != 0 { // cant check that bucket_start is not 0 because thats a reasonable start value.
log.Fatalf("Static list of buckets chosen for %s.%s but bucket count or bucket width defined.", namespace, set)
}
// should be using static buckets if we are still here.
buckets = histogramConf.StaticBucketList
} else {
buckets = prometheus.LinearBuckets(bucket_start, bucket_width, number_of_buckets)
}

//Buckets: []float64{0.1, 0.2, 0.5, 1.0, 2.0, 5.0, 10.0}, // Custom static buckets

expirationTTLCountsHist := prometheus.NewHistogramVec(
prometheus.HistogramOpts{
Name: "aerospike_expiration_ttl_counts_hist",
Help: "h",
Buckets: buckets,
ConstLabels: prometheus.Labels{"namespace": namespace, "set": set},
}, []string{},
)
prometheus.MustRegister(expirationTTLCountsHist)

histograms := make(map[string]*prometheus.HistogramVec)
histograms["counts"] = expirationTTLCountsHist

// Add the HistogramVec to the inner map
ns_set_to_histograms[namespace+"_"+set] = histograms

//now we can call something like ns_set_to_histograms[mynamespace_myset].Observe in the future.
}
prometheus.MustRegister(scanTimes)
prometheus.MustRegister(scanLastUpdated)
prometheus.MustRegister(buildInfo)
buildInfo.WithLabelValues(buildVersion).Set(1)
prometheus.MustRegister(expirationTTLPercents)
prometheus.MustRegister(expirationTTLCounts)

// create a list of local ips to compare against and ensure we are checking the local node only
// this should only need to happen once
Expand Down
Loading

0 comments on commit 2b3495a

Please sign in to comment.