mirror of
https://github.com/ClusterCockpit/cc-metric-collector.git
synced 2024-09-20 07:27:25 +02:00
Run collectors and sink periodically
This commit is contained in:
Thomas Roehl
parent
627d268d0b
commit
d49fda0820
314
clusterdaemon.go
314
clusterdaemon.go
@ -4,13 +4,15 @@ import (
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"fmt"
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"os"
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"os/exec"
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//"bytes"
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// "context"
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"encoding/json"
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"path/filepath"
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"sort"
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//"sort"
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"strings"
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"time"
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"errors"
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protocol "github.com/influxdata/line-protocol"
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)
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type GlobalConfig struct {
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@ -41,106 +43,58 @@ type GlobalConfig struct {
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type CollectorConfig struct {
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Command string `json:"command"`
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Args string `json:"arguments"`
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Provides []string `json:"provides"`
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}
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type InternalCollectorConfig struct {
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Config CollectorConfig
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Location string
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LastRun time.Time
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encoder *protocol.Encoder
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}
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//////////////////////////////////////////////////////////////////////////////
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// Load global configuration from JSON file
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//////////////////////////////////////////////////////////////////////////////
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func LoadGlobalConfiguration(file string, config *GlobalConfig) error {
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configFile, err := os.Open(file)
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defer configFile.Close()
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if err != nil {
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fmt.Println(err.Error())
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return err
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}
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jsonParser := json.NewDecoder(configFile)
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jsonParser.Decode(config)
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return err
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}
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//////////////////////////////////////////////////////////////////////////////
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// Load collector configuration from JSON file
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//////////////////////////////////////////////////////////////////////////////
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func LoadCollectorConfiguration(file string, config *CollectorConfig) error {
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configFile, err := os.Open(file)
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defer configFile.Close()
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if err != nil {
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fmt.Println(err.Error())
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return err
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}
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jsonParser := json.NewDecoder(configFile)
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jsonParser.Decode(config)
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return err
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}
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func SortStringStringMap(input map[string]string) []string {
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keys := make([]string, 0, len(input))
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output := make([]string, len(input))
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for k := range input {
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keys = append(keys, k)
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}
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sort.Strings(keys)
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for i, k := range keys {
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var s strings.Builder
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fmt.Fprintf(&s, "%s=%s", k, string(input[k]))
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output[i] = s.String()
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}
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return output
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}
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func SortStringInterfaceMap(input map[string]interface{}) []string {
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keys := make([]string, 0, len(input))
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output := make([]string, len(input))
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for k := range input {
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keys = append(keys, k)
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}
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sort.Strings(keys)
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for i, k := range keys {
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var s strings.Builder
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fmt.Fprintf(&s, "%s=%v", k, input[k])
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output[i] = s.String()
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}
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return output
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}
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func CreatePoint(metricname string, tags map[string]string, fields map[string]interface{}, timestamp int64) string {
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var s strings.Builder
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taglist := SortStringStringMap(tags)
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fieldlist := SortStringInterfaceMap(fields)
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if len(taglist) > 0 {
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fmt.Fprintf(&s, "%s,%s %s %d", metricname, strings.Join(taglist, ","), strings.Join(fieldlist, ","), timestamp)
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} else {
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fmt.Fprintf(&s, "%s %s %d", metricname, strings.Join(fieldlist, ","), timestamp)
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}
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return s.String()
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}
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func run_cmd(cmd string, cmd_opts string) string {
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//ctx, cancel := context.WithTimeout(context.Background(), 100*time.Second)
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//defer cancel()
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//command := exec.CommandContext(ctx, cmd, strings.Join(cmd_opts, " "))
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command := exec.Command(cmd, cmd_opts)
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command.Wait()
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//select {
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// case <-time.After(101 * time.Second):
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// fmt.Println("overslept")
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// case <-ctx.Done():
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// fmt.Println(ctx.Err()) // prints "context deadline exceeded"
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//}
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stdout, err := command.Output()
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if err != nil {
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fmt.Println(err.Error())
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return ""
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}
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return (string(stdout))
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}
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//////////////////////////////////////////////////////////////////////////////
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// Load collector configurations
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//////////////////////////////////////////////////////////////////////////////
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func GetSingleCollector(folders *[]string) filepath.WalkFunc {
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return func(path string, info os.FileInfo, err error) error {
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if err != nil {
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panic(err)
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}
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if info.IsDir() {
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configfile := filepath.Join(path, "config.json")
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if _, err := os.Stat(configfile); err == nil {
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*folders = append(*folders, path)
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// TODO: Validate config?
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p, err := filepath.Abs(path)
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if err == nil {
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*folders = append(*folders, p)
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}
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}
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}
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return nil
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@ -148,14 +102,176 @@ func GetSingleCollector(folders *[]string) filepath.WalkFunc {
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}
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func GetCollectorFolders(root string, folders *[]string) error {
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err := filepath.Walk(root, GetSingleCollector(folders))
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if err != nil {
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panic(err)
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err = errors.New("Cannot get collectors")
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}
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return err
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}
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//////////////////////////////////////////////////////////////////////////////
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// Setup all collectors
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//////////////////////////////////////////////////////////////////////////////
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func SetupCollectors(config GlobalConfig) ([]InternalCollectorConfig, error) {
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var folders []string
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var outconfig []InternalCollectorConfig
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//encoder := protocol.NewEncoder(buf)
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//encoder.SetMaxLineBytes(1024)
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GetCollectorFolders(config.CollectorPath, &folders)
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for _, path := range folders {
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var col_config InternalCollectorConfig
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LoadCollectorConfiguration(filepath.Join(path, "config.json"), &col_config.Config)
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col_config.LastRun = time.Now()
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col_config.Location = path
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//buf := &bytes.Buffer{}
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//col_config.Encoder := protocol.NewEncoder(buf)
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//col_config.Encoder.SetMaxLineBytes(1024)
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outconfig = append(outconfig, col_config)
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}
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return outconfig, nil
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}
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//////////////////////////////////////////////////////////////////////////////
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// Run collector
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//////////////////////////////////////////////////////////////////////////////
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func RunCollector(config InternalCollectorConfig) ([]string, error) {
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var results []string
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var err error
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cmd := config.Config.Command
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if _, err = os.Stat(cmd); err != nil {
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//fmt.Println(err.Error())
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if ! strings.HasPrefix(cmd, "/") {
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cmd = filepath.Join(config.Location, config.Config.Command)
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if _, err = os.Stat(cmd); err != nil {
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//fmt.Println(err.Error())
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cmd, err = exec.LookPath(config.Config.Command)
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}
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}
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}
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if err != nil {
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fmt.Println(err.Error())
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return results, err
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}
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// TODO: Add timeout
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command := exec.Command(cmd, config.Config.Args)
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command.Dir = config.Location
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command.Wait()
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stdout, err := command.Output()
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if err != nil {
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//log.error(err.Error())
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fmt.Println(err.Error())
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return results, err
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}
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lines := strings.Split(string(stdout), "\n")
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for _, l := range lines {
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if strings.HasPrefix(l, "#") { continue }
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results = append(results, l)
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}
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return results, err
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}
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//////////////////////////////////////////////////////////////////////////////
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// Setup sink
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//////////////////////////////////////////////////////////////////////////////
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func SetupSink(config GlobalConfig) chan string {
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c := make(chan string, 300)
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// TODO: Setup something for sending? Establish HTTP connection?
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return c
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}
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func RunSink(config GlobalConfig, queue* chan string) (*time.Ticker, chan bool) {
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var interval time.Duration
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interval = time.Duration(config.Report.Interval) * time.Second
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ticker := time.NewTicker(interval)
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done := make(chan bool)
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go func() {
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for {
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select {
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case <- done:
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return
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case t := <-ticker.C:
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fmt.Println("SinkTick at", t)
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empty := false
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var batch []string
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for empty == false {
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select {
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case metric := <- *queue:
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fmt.Println(metric)
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batch = append(batch, metric)
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default:
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// No metric available, wait for the next iteration
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empty = true
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break
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}
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}
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for _, m := range batch {
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fmt.Println(m)
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}
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}
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}
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}()
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return ticker, done
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}
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func CloseSink(config GlobalConfig, queue *chan string, ticker *time.Ticker, done chan bool) {
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ticker.Stop()
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done <- true
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close(*queue)
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}
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func MainLoop(config GlobalConfig, sink *chan string) (*time.Ticker, chan bool) {
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var intConfig []InternalCollectorConfig
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intConfig, err := SetupCollectors(config)
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if err != nil {
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panic(err)
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}
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var interval time.Duration
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interval = time.Duration(config.Schedule.Node.Frequency) * time.Second
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ticker := time.NewTicker(time.Second)
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done := make(chan bool)
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go func() {
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for {
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select {
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case <-done:
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return
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case t := <-ticker.C:
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fmt.Println("CollectorTick at", t)
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unix := time.Now()
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for i, _ := range intConfig {
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if time.Duration(unix.Sub(intConfig[i].LastRun)) > interval {
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res, err := RunCollector(intConfig[i])
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if err != nil {
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//log.error("Collector failed: ", err.Error())
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} else {
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//TODO: parse and skip in case of error, encode to []string
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for _, r := range res {
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if len(r) > 0 {
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*sink <- r
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}
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}
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}
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intConfig[i].LastRun = time.Now()
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}
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}
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}
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}
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}()
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return ticker, done
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}
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func main() {
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// fmt.Println("Hello")
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// cmd_opts := []string{"la","le","lu"}
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@ -172,25 +288,33 @@ func main() {
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var config GlobalConfig
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LoadGlobalConfiguration("config.json", &config)
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var folders []string
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GetCollectorFolders(config.CollectorPath, &folders)
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queue := SetupSink(config)
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sinkTicker, sinkDone := RunSink(config, &queue)
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collectTicker, collectDone := MainLoop(config, &queue)
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time.Sleep(1600 * time.Second)
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collectTicker.Stop()
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collectDone <- true
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CloseSink(config, &queue, sinkTicker, sinkDone)
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for _, path := range folders {
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var col_config CollectorConfig
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LoadCollectorConfiguration(filepath.Join(path, "config.json"), &col_config)
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stdout := run_cmd(filepath.Join(path, col_config.Command), col_config.Args)
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// var folders []string
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// GetCollectorFolders(config.CollectorPath, &folders)
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metrics := strings.Split(stdout, "\n")
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for _, m := range metrics {
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if len(m) > 0 {
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t := strings.Fields(m)
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if len(t) == 2 {
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var s strings.Builder
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fmt.Fprintf(&s, "%s %d", m, time.Now().UnixNano())
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m = s.String()
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}
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fmt.Println("SEND", m)
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}
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}
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}
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// for _, path := range folders {
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// var col_config CollectorConfig
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// LoadCollectorConfiguration(filepath.Join(path, "config.json"), &col_config)
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// stdout := run_cmd(filepath.Join(path, col_config.Command), col_config.Args)
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// metrics := strings.Split(stdout, "\n")
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// for _, m := range metrics {
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// if len(m) > 0 {
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// t := strings.Fields(m)
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// if len(t) == 2 {
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// var s strings.Builder
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// fmt.Fprintf(&s, "%s %d", m, time.Now().UnixNano())
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// m = s.String()
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// }
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// fmt.Println("SEND", m)
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// }
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// }
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// }
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}
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