mirror of
https://github.com/ClusterCockpit/cc-metric-collector.git
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117 lines
3.6 KiB
Markdown
117 lines
3.6 KiB
Markdown
# CCMetric collectors
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This folder contains the collectors for the cc-metric-collector.
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# Configuration
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```json
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{
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"collector_type" : {
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<collector specific configuration>
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}
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}
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```
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In contrast to the configuration files for sinks and receivers, the collectors configuration is not a list but a set of dicts. This is required because we didn't manage to partially read the type before loading the remaining configuration. We are eager to change this to the same format.
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# Available collectors
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* [`cpustat`](./cpustatMetric.md)
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* [`memstat`](./memstatMetric.md)
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* [`diskstat`](./diskstatMetric.md)
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* [`loadavg`](./loadavgMetric.md)
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* [`netstat`](./netstatMetric.md)
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* [`ibstat`](./infinibandMetric.md)
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* [`tempstat`](./tempMetric.md)
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* [`lustre`](./lustreMetric.md)
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* [`likwid`](./likwidMetric.md)
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* [`nvidia`](./nvidiaMetric.md)
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* [`customcmd`](./customCmdMetric.md)
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* [`ipmistat`](./ipmiMetric.md)
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* [`topprocs`](./topprocsMetric.md)
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## Todos
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* [ ] Exclude devices for `diskstat` collector
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* [ ] Aggreate metrics to higher topology entity (sum hwthread metrics to socket metric, ...). Needs to be configurable
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# Contributing own collectors
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A collector reads data from any source, parses it to metrics and submits these metrics to the `metric-collector`. A collector provides three function:
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* `Name() string`: Return the name of the collector
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* `Init(config json.RawMessage) error`: Initializes the collector using the given collector-specific config in JSON. Check if needed files/commands exists, ...
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* `Initialized() bool`: Check if a collector is successfully initialized
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* `Read(duration time.Duration, output chan ccMetric.CCMetric)`: Read, parse and submit data to the `output` channel as [`CCMetric`](../internal/ccMetric/README.md). If the collector has to measure anything for some duration, use the provided function argument `duration`.
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* `Close()`: Closes down the collector.
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It is recommanded to call `setup()` in the `Init()` function.
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Finally, the collector needs to be registered in the `collectorManager.go`. There is a list of collectors called `AvailableCollectors` which is a map (`collector_type_string` -> `pointer to MetricCollector interface`). Add a new entry with a descriptive name and the new collector.
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## Sample collector
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```go
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package collectors
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import (
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"encoding/json"
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"time"
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lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
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)
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// Struct for the collector-specific JSON config
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type SampleCollectorConfig struct {
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ExcludeMetrics []string `json:"exclude_metrics"`
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}
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type SampleCollector struct {
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metricCollector
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config SampleCollectorConfig
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}
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func (m *SampleCollector) 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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m.name = "SampleCollector"
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m.setup()
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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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return err
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}
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}
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m.meta = map[string]string{"source": m.name, "group": "Sample"}
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m.init = true
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return nil
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}
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func (m *SampleCollector) Read(interval time.Duration, output chan lp.CCMetric) {
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if !m.init {
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return
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}
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// tags for the metric, if type != node use proper type and type-id
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tags := map[string]string{"type" : "node"}
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x, err := GetMetric()
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if err != nil {
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cclog.ComponentError(m.name, fmt.Sprintf("Read(): %v", err))
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}
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// Each metric has exactly one field: value !
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value := map[string]interface{}{"value": int64(x)}
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if y, err := lp.New("sample_metric", tags, m.meta, value, time.Now()); err == nil {
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output <- y
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}
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}
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func (m *SampleCollector) Close() {
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m.init = false
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return
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}
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```
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