116 lines
3.0 KiB
Go
116 lines
3.0 KiB
Go
package mysql
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import (
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"context"
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"database/sql"
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"log"
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"strings"
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"sync"
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"time"
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"flashcat.cloud/categraf/inputs"
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"flashcat.cloud/categraf/pkg/conv"
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"flashcat.cloud/categraf/pkg/tagx"
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"github.com/toolkits/pkg/container/list"
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)
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func (m *MySQL) gatherCustomQueries(slist *list.SafeList, ins *Instance, db *sql.DB, globalTags map[string]string) {
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wg := new(sync.WaitGroup)
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defer wg.Wait()
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for i := 0; i < len(ins.Queries); i++ {
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wg.Add(1)
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go m.gatherOneQuery(slist, ins, db, globalTags, wg, ins.Queries[i])
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}
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}
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func (m *MySQL) gatherOneQuery(slist *list.SafeList, ins *Instance, db *sql.DB, globalTags map[string]string, wg *sync.WaitGroup, query QueryConfig) {
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defer wg.Done()
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timeout := time.Duration(query.Timeout)
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ctx, cancel := context.WithTimeout(context.Background(), timeout)
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defer cancel()
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rows, err := db.QueryContext(ctx, query.Request)
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if ctx.Err() == context.DeadlineExceeded {
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log.Println("E! query timeout, request:", query.Request)
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return
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}
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if err != nil {
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log.Println("E! failed to query:", err)
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return
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}
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defer rows.Close()
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cols, err := rows.Columns()
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if err != nil {
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log.Println("E! failed to get columns:", err)
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return
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}
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for rows.Next() {
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columns := make([]sql.RawBytes, len(cols))
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columnPointers := make([]interface{}, len(cols))
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for i := range columns {
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columnPointers[i] = &columns[i]
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}
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// Scan the result into the column pointers...
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if err := rows.Scan(columnPointers...); err != nil {
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log.Println("E! failed to scan:", err)
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return
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}
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row := make(map[string]string)
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for i, colName := range cols {
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val := columnPointers[i].(*sql.RawBytes)
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row[strings.ToLower(colName)] = string(*val)
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}
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if err = m.parseRow(row, query, slist, globalTags); err != nil {
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log.Println("E! failed to parse row:", err, "sql:", query.Request)
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}
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}
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}
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func (m *MySQL) parseRow(row map[string]string, query QueryConfig, slist *list.SafeList, globalTags map[string]string) error {
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labels := tagx.Copy(globalTags)
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for _, label := range query.LabelFields {
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labelValue, has := row[label]
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if has {
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labels[label] = strings.Replace(labelValue, " ", "_", -1)
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}
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}
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for _, column := range query.MetricFields {
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value, err := conv.ToFloat64(row[column])
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if err != nil {
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log.Println("E! failed to convert field:", column, "value:", value, "error:", err)
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return err
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}
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if query.FieldToAppend == "" {
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slist.PushFront(inputs.NewSample(query.Mesurement+"_"+column, value, labels))
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} else {
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suffix := cleanName(row[query.FieldToAppend])
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slist.PushFront(inputs.NewSample(query.Mesurement+"_"+suffix+"_"+column, value, labels))
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}
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}
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return nil
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}
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func cleanName(s string) string {
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s = strings.Replace(s, " ", "_", -1) // Remove spaces
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s = strings.Replace(s, "(", "", -1) // Remove open parenthesis
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s = strings.Replace(s, ")", "", -1) // Remove close parenthesis
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s = strings.Replace(s, "/", "", -1) // Remove forward slashes
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s = strings.Replace(s, "*", "", -1) // Remove asterisks
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s = strings.Replace(s, "%", "percent", -1)
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s = strings.ToLower(s)
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return s
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}
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