mirror of
https://github.com/ClusterCockpit/cc-metric-collector.git
synced 2024-11-10 04:27:25 +01:00
335 lines
9.1 KiB
Go
335 lines
9.1 KiB
Go
package collectors
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import (
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"bufio"
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"bytes"
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"encoding/json"
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"fmt"
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"io"
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"log"
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"os/exec"
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"os/user"
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"strconv"
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"strings"
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"time"
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cclog "github.com/ClusterCockpit/cc-metric-collector/internal/ccLogger"
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lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
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)
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const DEFAULT_GPFS_CMD = "mmpmon"
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type GpfsCollectorLastState struct {
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bytesRead int64
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bytesWritten int64
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}
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type GpfsCollector struct {
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metricCollector
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tags map[string]string
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config struct {
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Mmpmon string `json:"mmpmon_path,omitempty"`
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ExcludeFilesystem []string `json:"exclude_filesystem,omitempty"`
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SendBandwidths bool `json:"send_bandwidths"`
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}
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skipFS map[string]struct{}
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lastTimestamp time.Time // Store time stamp of last tick to derive bandwidths
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lastState map[string]GpfsCollectorLastState
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}
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func (m *GpfsCollector) Init(config json.RawMessage) error {
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// Check if already initialized
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if m.init {
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return nil
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}
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var err error
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m.name = "GpfsCollector"
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m.setup()
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m.parallel = true
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// Set default mmpmon binary
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m.config.Mmpmon = DEFAULT_GPFS_CMD
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// Read JSON configuration
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if len(config) > 0 {
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err = json.Unmarshal(config, &m.config)
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if err != nil {
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log.Print(err.Error())
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return err
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}
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}
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m.meta = map[string]string{
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"source": m.name,
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"group": "GPFS",
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}
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m.tags = map[string]string{
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"type": "node",
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"filesystem": "",
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}
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m.skipFS = make(map[string]struct{})
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for _, fs := range m.config.ExcludeFilesystem {
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m.skipFS[fs] = struct{}{}
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}
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m.lastState = make(map[string]GpfsCollectorLastState)
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// GPFS / IBM Spectrum Scale file system statistics can only be queried by user root
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user, err := user.Current()
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if err != nil {
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return fmt.Errorf("failed to get current user: %v", err)
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}
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if user.Uid != "0" {
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return fmt.Errorf("GPFS file system statistics can only be queried by user root")
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}
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// Check if mmpmon is in executable search path
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p, err := exec.LookPath(m.config.Mmpmon)
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if err != nil {
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return fmt.Errorf("failed to find mmpmon binary '%s': %v", m.config.Mmpmon, err)
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}
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m.config.Mmpmon = p
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m.init = true
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return nil
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}
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func (m *GpfsCollector) Read(interval time.Duration, output chan lp.CCMetric) {
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// Check if already initialized
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if !m.init {
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return
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}
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// Current time stamp
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now := time.Now()
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// time difference to last time stamp
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timeDiff := now.Sub(m.lastTimestamp).Seconds()
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// Save current timestamp
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m.lastTimestamp = now
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// mmpmon:
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// -p: generate output that can be parsed
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// -s: suppress the prompt on input
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// fs_io_s: Displays I/O statistics per mounted file system
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cmd := exec.Command(m.config.Mmpmon, "-p", "-s")
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cmd.Stdin = strings.NewReader("once fs_io_s\n")
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cmdStdout := new(bytes.Buffer)
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cmdStderr := new(bytes.Buffer)
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cmd.Stdout = cmdStdout
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cmd.Stderr = cmdStderr
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err := cmd.Run()
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if err != nil {
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dataStdErr, _ := io.ReadAll(cmdStderr)
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dataStdOut, _ := io.ReadAll(cmdStdout)
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cclog.ComponentError(
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m.name,
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fmt.Sprintf("Read(): Failed to execute command \"%s\": %v\n", cmd.String(), err),
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fmt.Sprintf("Read(): command exit code: \"%d\"\n", cmd.ProcessState.ExitCode()),
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fmt.Sprintf("Read(): command stderr: \"%s\"\n", string(dataStdErr)),
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fmt.Sprintf("Read(): command stdout: \"%s\"\n", string(dataStdOut)),
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)
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return
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}
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// Read I/O statistics
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scanner := bufio.NewScanner(cmdStdout)
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for scanner.Scan() {
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lineSplit := strings.Fields(scanner.Text())
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// Only process lines starting with _fs_io_s_
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if lineSplit[0] != "_fs_io_s_" {
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continue
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}
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key_value := make(map[string]string)
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for i := 1; i < len(lineSplit); i += 2 {
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key_value[lineSplit[i]] = lineSplit[i+1]
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}
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// Ignore keys:
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// _n_: node IP address,
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// _nn_: node name,
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// _cl_: cluster name,
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// _d_: number of disks
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filesystem, ok := key_value["_fs_"]
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if !ok {
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cclog.ComponentError(
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m.name,
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"Read(): Failed to get filesystem name.")
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continue
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}
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// Skip excluded filesystems
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if _, skip := m.skipFS[filesystem]; skip {
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continue
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}
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// Add filesystem tag
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m.tags["filesystem"] = filesystem
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// Create initial last state
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if m.config.SendBandwidths {
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if _, ok := m.lastState[filesystem]; !ok {
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m.lastState[filesystem] = GpfsCollectorLastState{
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bytesRead: -1,
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bytesWritten: -1,
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}
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}
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}
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// return code
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rc, err := strconv.Atoi(key_value["_rc_"])
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if err != nil {
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cclog.ComponentError(
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m.name,
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fmt.Sprintf("Read(): Failed to convert return code '%s' to int: %v", key_value["_rc_"], err))
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continue
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}
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if rc != 0 {
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cclog.ComponentError(
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m.name,
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fmt.Sprintf("Read(): Filesystem '%s' is not ok.", filesystem))
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continue
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}
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sec, err := strconv.ParseInt(key_value["_t_"], 10, 64)
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if err != nil {
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cclog.ComponentError(
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m.name,
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fmt.Sprintf("Read(): Failed to convert seconds '%s' to int64: %v", key_value["_t_"], err))
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continue
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}
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msec, err := strconv.ParseInt(key_value["_tu_"], 10, 64)
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if err != nil {
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cclog.ComponentError(
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m.name,
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fmt.Sprintf("Read(): Failed to convert micro seconds '%s' to int64: %v", key_value["_tu_"], err))
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continue
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}
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timestamp := time.Unix(sec, msec*1000)
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// bytes read
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bytesRead, err := strconv.ParseInt(key_value["_br_"], 10, 64)
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if err != nil {
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cclog.ComponentError(
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m.name,
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fmt.Sprintf("Read(): Failed to convert bytes read '%s' to int64: %v", key_value["_br_"], err))
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continue
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}
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if y, err := lp.New("gpfs_bytes_read", m.tags, m.meta, map[string]interface{}{"value": bytesRead}, timestamp); err == nil {
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output <- y
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}
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if m.config.SendBandwidths {
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if lastBytesRead := m.lastState[filesystem].bytesRead; lastBytesRead >= 0 {
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bwRead := float64(bytesRead-lastBytesRead) / timeDiff
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if y, err := lp.New("gpfs_bw_read", m.tags, m.meta, map[string]interface{}{"value": bwRead}, timestamp); err == nil {
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output <- y
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}
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}
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}
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// bytes written
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bytesWritten, err := strconv.ParseInt(key_value["_bw_"], 10, 64)
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if err != nil {
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cclog.ComponentError(
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m.name,
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fmt.Sprintf("Read(): Failed to convert bytes written '%s' to int64: %v", key_value["_bw_"], err))
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continue
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}
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if y, err := lp.New("gpfs_bytes_written", m.tags, m.meta, map[string]interface{}{"value": bytesWritten}, timestamp); err == nil {
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output <- y
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}
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if m.config.SendBandwidths {
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if lastBytesWritten := m.lastState[filesystem].bytesRead; lastBytesWritten >= 0 {
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bwWrite := float64(bytesWritten-lastBytesWritten) / timeDiff
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if y, err := lp.New("gpfs_bw_write", m.tags, m.meta, map[string]interface{}{"value": bwWrite}, timestamp); err == nil {
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output <- y
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}
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}
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}
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if m.config.SendBandwidths {
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m.lastState[filesystem] = GpfsCollectorLastState{
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bytesRead: bytesRead,
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bytesWritten: bytesWritten,
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}
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}
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// number of opens
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numOpens, err := strconv.ParseInt(key_value["_oc_"], 10, 64)
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if err != nil {
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cclog.ComponentError(
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m.name,
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fmt.Sprintf("Read(): Failed to convert number of opens '%s' to int64: %v", key_value["_oc_"], err))
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continue
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}
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if y, err := lp.New("gpfs_num_opens", m.tags, m.meta, map[string]interface{}{"value": numOpens}, timestamp); err == nil {
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output <- y
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}
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// number of closes
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numCloses, err := strconv.ParseInt(key_value["_cc_"], 10, 64)
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if err != nil {
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cclog.ComponentError(
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m.name,
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fmt.Sprintf("Read(): Failed to convert number of closes: '%s' to int64: %v", key_value["_cc_"], err))
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continue
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}
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if y, err := lp.New("gpfs_num_closes", m.tags, m.meta, map[string]interface{}{"value": numCloses}, timestamp); err == nil {
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output <- y
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}
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// number of reads
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numReads, err := strconv.ParseInt(key_value["_rdc_"], 10, 64)
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if err != nil {
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cclog.ComponentError(
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m.name,
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fmt.Sprintf("Read(): Failed to convert number of reads: '%s' to int64: %v", key_value["_rdc_"], err))
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continue
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}
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if y, err := lp.New("gpfs_num_reads", m.tags, m.meta, map[string]interface{}{"value": numReads}, timestamp); err == nil {
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output <- y
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}
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// number of writes
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numWrites, err := strconv.ParseInt(key_value["_wc_"], 10, 64)
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if err != nil {
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cclog.ComponentError(
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m.name,
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fmt.Sprintf("Read(): Failed to convert number of writes: '%s' to int64: %v", key_value["_wc_"], err))
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continue
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}
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if y, err := lp.New("gpfs_num_writes", m.tags, m.meta, map[string]interface{}{"value": numWrites}, timestamp); err == nil {
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output <- y
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}
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// number of read directories
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numReaddirs, err := strconv.ParseInt(key_value["_dir_"], 10, 64)
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if err != nil {
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cclog.ComponentError(
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m.name,
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fmt.Sprintf("Read(): Failed to convert number of read directories: '%s' to int64: %v", key_value["_dir_"], err))
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continue
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}
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if y, err := lp.New("gpfs_num_readdirs", m.tags, m.meta, map[string]interface{}{"value": numReaddirs}, timestamp); err == nil {
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output <- y
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}
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// Number of inode updates
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numInodeUpdates, err := strconv.ParseInt(key_value["_iu_"], 10, 64)
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if err != nil {
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cclog.ComponentError(
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m.name,
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fmt.Sprintf("Read(): Failed to convert number of inode updates: '%s' to int: %v", key_value["_iu_"], err))
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continue
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}
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if y, err := lp.New("gpfs_num_inode_updates", m.tags, m.meta, map[string]interface{}{"value": numInodeUpdates}, timestamp); err == nil {
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output <- y
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}
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}
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}
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func (m *GpfsCollector) Close() {
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m.init = false
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}
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