Removed the GTID field from the GaleraState struct

As we're still not sure what to do on the operator side with the GTID we decided to not export it in the `GaleraState`. It would also force us to import the `GaleraState` struct to the operator repository so we chose to just not export it for the moment instead.

https://mariadb-operator.slack.com/archives/C056RAECH0W/p1699990598511999?thread_ts=1699350363.009529&cid=C056RAECH0W

Author: Matthieu`

pkg/galera/galera.go

@@ -36,7 +36,6 @@ type GaleraState struct {
 	Version         string `json:"version"`
 	UUID            string `json:"uuid"`
 	Seqno           int    `json:"seqno"`
-	GTID            *GTID  `json:"gtid"`
 	SafeToBootstrap bool   `json:"safeToBootstrap"`
 }
 
@@ -74,14 +73,13 @@ func (g *GaleraState) MarshalText() ([]byte, error) {
 	}
 	tpl := createTpl("grastate.dat", `version: {{ .Version }}
 uuid: {{ .UUID }}
-seqno: {{ .Seqno }}{{ if .GTID }},{{ .GTID }}{{ end }}
+seqno: {{ .Seqno }}
 safe_to_bootstrap: {{ .SafeToBootstrap }}`)
 	buf := new(bytes.Buffer)
 	err := tpl.Execute(buf, tplOpts{
 		Version: g.Version,
 		UUID:    g.UUID,
 		Seqno:   g.Seqno,
-		GTID:    g.GTID,
 		SafeToBootstrap: func() int {
 			if g.SafeToBootstrap {
 				return 1
@@ -125,15 +123,17 @@ func (g *GaleraState) UnmarshalText(text []byte) error {
 			uuid = &value
 		case "seqno":
 			// When the `wsrep_gtid_mode` is set to `ON`, the `seqno` is
-			// actually a string of the form `seqno,gtid`.
+			// actually a string of the form `<seqno>,<gtid>`.
+			//
+			// For the moment we only care about the `seqno` part as we're
+			// still not sure about what to do with the `gtid`.
 			seqnoStr, gtidStr, found := strings.Cut(value, ",")
 			if found {
 				gtid = &GTID{}
 				err := gtid.UnmarshalText([]byte(gtidStr))
 				if err != nil {
 					return fmt.Errorf("error parsing gtid: %v", err)
 				}
-
 			}
 			i, err := strconv.Atoi(seqnoStr)
 			if err != nil {
@@ -158,10 +158,6 @@ func (g *GaleraState) UnmarshalText(text []byte) error {
 	g.Version = *version
 	g.UUID = *uuid
 	g.Seqno = *seqno
-	// Only set the GTID if it was found in the file.
-	if gtid != nil {
-		g.GTID = gtid
-	}
 	g.SafeToBootstrap = *safeToBootstrap
 	return nil
 }

pkg/galera/galera_test.go

@@ -71,7 +71,6 @@ safe_to_bootstrap: 0`,
 				Version:         "2.1",
 				UUID:            "05f061bd-02a3-11ee-857c-aa370ff6666b",
 				Seqno:           1,
-				GTID:            &GTID{DomainID: 0, ServerID: 1, SequenceNumber: 2},
 				SafeToBootstrap: true,
 			},
 			want: `version: 2.1
@@ -242,7 +241,6 @@ safe_to_bootstrap: 1`),
 				Version:         "2.1",
 				UUID:            "05f061bd-02a3-11ee-857c-aa370ff6666b",
 				Seqno:           1,
-				GTID:            &GTID{DomainID: 0, ServerID: 1, SequenceNumber: 2},
 				SafeToBootstrap: true,
 			},
 		},