95 lines
1.9 KiB
Go
95 lines
1.9 KiB
Go
package agent
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import (
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"errors"
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"fmt"
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"log"
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"path"
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"strings"
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"flashcat.cloud/categraf/config"
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"flashcat.cloud/categraf/inputs"
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"flashcat.cloud/categraf/pkg/cfg"
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"flashcat.cloud/categraf/types"
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"github.com/toolkits/pkg/file"
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)
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const inputFilePrefix = "input."
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func (a *Agent) startMetricsAgent() error {
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names, err := a.getInputsByDirs()
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if err != nil {
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return err
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}
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if len(names) == 0 {
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log.Println("I! no inputs")
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return nil
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}
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for _, name := range names {
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if len(a.InputFilters) > 0 {
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// do filter
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if _, has := a.InputFilters[name]; !has {
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continue
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}
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}
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creator, has := inputs.InputCreators[name]
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if !has {
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log.Println("E! input:", name, "not supported")
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continue
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}
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// construct input instance
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input := creator()
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// set configurations for input instance
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err = cfg.LoadConfigs(path.Join(config.Config.ConfigDir, inputFilePrefix+name), input)
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if err != nil {
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log.Println("E! failed to load configuration of plugin:", name, "error:", err)
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continue
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}
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if err = input.Init(); err != nil {
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if !errors.Is(err, types.ErrInstancesEmpty) {
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log.Println("E! failed to init input:", name, "error:", err)
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}
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continue
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}
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a.StartReader(name, input)
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log.Println("I! input:", name, "started")
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}
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return nil
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}
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// input dir should has prefix input.
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func (a *Agent) getInputsByDirs() ([]string, error) {
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dirs, err := file.DirsUnder(config.Config.ConfigDir)
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if err != nil {
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return nil, fmt.Errorf("failed to get dirs under %s : %v", config.Config.ConfigDir, err)
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}
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count := len(dirs)
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if count == 0 {
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return dirs, nil
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}
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names := make([]string, 0, count)
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for i := 0; i < count; i++ {
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if strings.HasPrefix(dirs[i], inputFilePrefix) {
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names = append(names, dirs[i][len(inputFilePrefix):])
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}
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}
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return names, nil
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}
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func (a *Agent) stopMetricsAgent() {
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for name := range a.InputReaders {
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a.InputReaders[name].Stop()
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}
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}
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