135 lines
2.0 KiB
Go
135 lines
2.0 KiB
Go
package mysql
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import (
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"database/sql"
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"strconv"
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"strings"
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_ "github.com/go-sql-driver/mysql"
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"github.com/influxdb/tivan/plugins"
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)
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type Server struct {
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Address string
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}
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type Mysql struct {
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Disabled bool
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Servers []*Server
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}
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var localhost = &Server{}
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func (m *Mysql) Gather(acc plugins.Accumulator) error {
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if m.Disabled {
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return nil
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}
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if len(m.Servers) == 0 {
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// if we can't get stats in this case, thats fine, don't report
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// an error.
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m.gatherServer(localhost, acc)
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return nil
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}
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for _, serv := range m.Servers {
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err := m.gatherServer(serv, acc)
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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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return nil
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}
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type mapping struct {
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onServer string
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inExport string
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}
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var mappings = []*mapping{
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{
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onServer: "Bytes_",
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inExport: "bytes_",
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},
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{
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onServer: "Com_",
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inExport: "commands_",
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},
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{
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onServer: "Handler_",
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inExport: "handler_",
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},
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{
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onServer: "Innodb_",
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inExport: "innodb_",
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},
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{
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onServer: "Threads_",
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inExport: "threads_",
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},
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}
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func (m *Mysql) gatherServer(serv *Server, acc plugins.Accumulator) error {
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db, err := sql.Open("mysql", serv.Address)
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if err != nil {
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return err
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}
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defer db.Close()
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rows, err := db.Query(`SHOW /*!50002 GLOBAL */ STATUS`)
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if err != nil {
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return nil
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}
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for rows.Next() {
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var name string
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var val interface{}
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err = rows.Scan(&name, &val)
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if err != nil {
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return err
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}
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var found bool
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for _, mapped := range mappings {
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if strings.HasPrefix(name, mapped.onServer) {
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i, _ := strconv.Atoi(string(val.([]byte)))
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acc.Add(mapped.inExport+name[len(mapped.onServer):], i, nil)
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found = true
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}
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}
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if found {
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continue
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}
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switch name {
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case "Queries":
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i, err := strconv.ParseInt(string(val.([]byte)), 10, 64)
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if err != nil {
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return err
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}
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acc.Add("queries", i, nil)
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case "Slow_queries":
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i, err := strconv.ParseInt(string(val.([]byte)), 10, 64)
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if err != nil {
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return err
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}
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acc.Add("slow_queries", i, nil)
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}
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}
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return nil
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}
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func init() {
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plugins.Add("mysql", func() plugins.Plugin {
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return &Mysql{}
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})
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}
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