cc-backend/internal/metricdata/archive.go
2022-06-21 17:52:36 +02:00

258 lines
6.0 KiB
Go

package metricdata
import (
"bufio"
"context"
"encoding/json"
"errors"
"fmt"
"math"
"os"
"path"
"path/filepath"
"strconv"
"time"
"github.com/ClusterCockpit/cc-backend/internal/config"
"github.com/ClusterCockpit/cc-backend/pkg/schema"
)
// For a given job, return the path of the `data.json`/`meta.json` file.
// TODO: Implement Issue ClusterCockpit/ClusterCockpit#97
func getPath(job *schema.Job, file string, checkLegacy bool) (string, error) {
lvl1, lvl2 := fmt.Sprintf("%d", job.JobID/1000), fmt.Sprintf("%03d", job.JobID%1000)
if !checkLegacy {
return filepath.Join(JobArchivePath, job.Cluster, lvl1, lvl2, strconv.FormatInt(job.StartTime.Unix(), 10), file), nil
}
legacyPath := filepath.Join(JobArchivePath, job.Cluster, lvl1, lvl2, file)
if _, err := os.Stat(legacyPath); errors.Is(err, os.ErrNotExist) {
return filepath.Join(JobArchivePath, job.Cluster, lvl1, lvl2, strconv.FormatInt(job.StartTime.Unix(), 10), file), nil
}
return legacyPath, nil
}
// Assuming job is completed/archived, return the jobs metric data.
func loadFromArchive(job *schema.Job) (schema.JobData, error) {
filename, err := getPath(job, "data.json", true)
if err != nil {
return nil, err
}
data := cache.Get(filename, func() (value interface{}, ttl time.Duration, size int) {
f, err := os.Open(filename)
if err != nil {
return err, 0, 1000
}
defer f.Close()
var data schema.JobData
if err := json.NewDecoder(bufio.NewReader(f)).Decode(&data); err != nil {
return err, 0, 1000
}
return data, 1 * time.Hour, data.Size()
})
if err, ok := data.(error); ok {
return nil, err
}
return data.(schema.JobData), nil
}
func loadMetaJson(job *schema.Job) (*schema.JobMeta, error) {
filename, err := getPath(job, "meta.json", true)
if err != nil {
return nil, err
}
bytes, err := os.ReadFile(filename)
if err != nil {
return nil, err
}
var metaFile schema.JobMeta = schema.JobMeta{
BaseJob: schema.JobDefaults,
}
if err := json.Unmarshal(bytes, &metaFile); err != nil {
return nil, err
}
return &metaFile, nil
}
// If the job is archived, find its `meta.json` file and override the tags list
// in that JSON file. If the job is not archived, nothing is done.
func UpdateTags(job *schema.Job, tags []*schema.Tag) error {
if job.State == schema.JobStateRunning {
return nil
}
filename, err := getPath(job, "meta.json", true)
if err != nil {
return err
}
f, err := os.Open(filename)
if err != nil {
if os.IsNotExist(err) {
return nil
}
return err
}
var metaFile schema.JobMeta = schema.JobMeta{
BaseJob: schema.JobDefaults,
}
if err := json.NewDecoder(f).Decode(&metaFile); err != nil {
return err
}
f.Close()
metaFile.Tags = make([]*schema.Tag, 0)
for _, tag := range tags {
metaFile.Tags = append(metaFile.Tags, &schema.Tag{
Name: tag.Name,
Type: tag.Type,
})
}
bytes, err := json.Marshal(metaFile)
if err != nil {
return err
}
return os.WriteFile(filename, bytes, 0644)
}
// Helper to metricdata.LoadAverages().
func loadAveragesFromArchive(job *schema.Job, metrics []string, data [][]schema.Float) error {
metaFile, err := loadMetaJson(job)
if err != nil {
return err
}
for i, m := range metrics {
if stat, ok := metaFile.Statistics[m]; ok {
data[i] = append(data[i], schema.Float(stat.Avg))
} else {
data[i] = append(data[i], schema.NaN)
}
}
return nil
}
func GetStatistics(job *schema.Job) (map[string]schema.JobStatistics, error) {
metaFile, err := loadMetaJson(job)
if err != nil {
return nil, err
}
return metaFile.Statistics, nil
}
// Writes a running job to the job-archive
func ArchiveJob(job *schema.Job, ctx context.Context) (*schema.JobMeta, error) {
allMetrics := make([]string, 0)
metricConfigs := config.GetCluster(job.Cluster).MetricConfig
for _, mc := range metricConfigs {
allMetrics = append(allMetrics, mc.Name)
}
// TODO: Talk about this! What resolutions to store data at...
scopes := []schema.MetricScope{schema.MetricScopeNode}
if job.NumNodes <= 8 {
scopes = append(scopes, schema.MetricScopeCore)
}
jobData, err := LoadData(job, allMetrics, scopes, ctx)
if err != nil {
return nil, err
}
jobMeta := &schema.JobMeta{
BaseJob: job.BaseJob,
StartTime: job.StartTime.Unix(),
Statistics: make(map[string]schema.JobStatistics),
}
for metric, data := range jobData {
avg, min, max := 0.0, math.MaxFloat32, -math.MaxFloat32
nodeData, ok := data["node"]
if !ok {
// TODO/FIXME: Calc average for non-node metrics as well!
continue
}
for _, series := range nodeData.Series {
avg += series.Statistics.Avg
min = math.Min(min, series.Statistics.Min)
max = math.Max(max, series.Statistics.Max)
}
jobMeta.Statistics[metric] = schema.JobStatistics{
Unit: config.GetMetricConfig(job.Cluster, metric).Unit,
Avg: avg / float64(job.NumNodes),
Min: min,
Max: max,
}
}
// If the file based archive is disabled,
// only return the JobMeta structure as the
// statistics in there are needed.
if !useArchive {
return jobMeta, nil
}
dir, err := getPath(job, "", false)
if err != nil {
return nil, err
}
return jobMeta, writeFiles(dir, jobMeta, &jobData)
}
func writeFiles(dir string, jobMeta *schema.JobMeta, jobData *schema.JobData) error {
if err := os.MkdirAll(dir, 0777); err != nil {
return err
}
f, err := os.Create(path.Join(dir, "meta.json"))
if err != nil {
return err
}
if err := json.NewEncoder(f).Encode(jobMeta); err != nil {
return err
}
if err := f.Close(); err != nil {
return err
}
f, err = os.Create(path.Join(dir, "data.json"))
if err != nil {
return err
}
if err := json.NewEncoder(f).Encode(jobData); err != nil {
return err
}
return f.Close()
}
// Used to import a non-running job into the job-archive.
func ImportJob(job *schema.JobMeta, jobData *schema.JobData) error {
dir, err := getPath(&schema.Job{
BaseJob: job.BaseJob,
StartTimeUnix: job.StartTime,
StartTime: time.Unix(job.StartTime, 0),
}, "", false)
if err != nil {
return err
}
return writeFiles(dir, job, jobData)
}