Example #1
0
// CopyTablets will create the tablets in the destination topo
func CopyTablets(fromTS, toTS topo.Server) {
	cells, err := fromTS.GetKnownCells()
	if err != nil {
		log.Fatalf("fromTS.GetKnownCells: %v", err)
	}

	wg := sync.WaitGroup{}
	rec := concurrency.AllErrorRecorder{}
	for _, cell := range cells {
		wg.Add(1)
		go func(cell string) {
			defer wg.Done()
			tabletAliases, err := fromTS.GetTabletsByCell(cell)
			if err != nil {
				rec.RecordError(fmt.Errorf("GetTabletsByCell(%v): %v", cell, err))
			} else {
				for _, tabletAlias := range tabletAliases {
					wg.Add(1)
					go func(tabletAlias topo.TabletAlias) {
						defer wg.Done()

						// read the source tablet
						ti, err := fromTS.GetTablet(tabletAlias)
						if err != nil {
							rec.RecordError(fmt.Errorf("GetTablet(%v): %v", tabletAlias, err))
							return
						}

						// try to create the destination
						err = toTS.CreateTablet(ti.Tablet)
						if err == topo.ErrNodeExists {
							// update the destination tablet
							log.Warningf("tablet %v already exists, updating it", tabletAlias)
							err = toTS.UpdateTabletFields(ti.Alias, func(t *topo.Tablet) error {
								*t = *ti.Tablet
								return nil
							})
						}
						if err != nil {
							rec.RecordError(fmt.Errorf("CreateTablet(%v): %v", tabletAlias, err))
							return
						}
					}(tabletAlias)
				}
			}
		}(cell)
	}
	wg.Wait()
	if rec.HasErrors() {
		log.Fatalf("copyTablets failed: %v", rec.Error())
	}
}
Example #2
0
func CheckTablet(ctx context.Context, t *testing.T, ts topo.Server) {
	cell := getLocalCell(t, ts)
	tablet := &topo.Tablet{
		Alias:    topo.TabletAlias{Cell: cell, Uid: 1},
		Hostname: "localhost",
		IPAddr:   "10.11.12.13",
		Portmap: map[string]int{
			"vt":    3333,
			"mysql": 3334,
		},

		Tags:     map[string]string{"tag": "value"},
		Keyspace: "test_keyspace",
		Type:     topo.TYPE_MASTER,
		State:    topo.STATE_READ_WRITE,
		KeyRange: newKeyRange("-10"),
	}
	if err := ts.CreateTablet(tablet); err != nil {
		t.Errorf("CreateTablet: %v", err)
	}
	if err := ts.CreateTablet(tablet); err != topo.ErrNodeExists {
		t.Errorf("CreateTablet(again): %v", err)
	}

	if _, err := ts.GetTablet(topo.TabletAlias{Cell: cell, Uid: 666}); err != topo.ErrNoNode {
		t.Errorf("GetTablet(666): %v", err)
	}

	ti, err := ts.GetTablet(tablet.Alias)
	if err != nil {
		t.Errorf("GetTablet %v: %v", tablet.Alias, err)
	}
	if eq, err := tabletEqual(ti.Tablet, tablet); err != nil {
		t.Errorf("cannot compare tablets: %v", err)
	} else if !eq {
		t.Errorf("put and got tablets are not identical:\n%#v\n%#v", tablet, ti.Tablet)
	}

	if _, err := ts.GetTabletsByCell("666"); err != topo.ErrNoNode {
		t.Errorf("GetTabletsByCell(666): %v", err)
	}

	inCell, err := ts.GetTabletsByCell(cell)
	if err != nil {
		t.Errorf("GetTabletsByCell: %v", err)
	}
	if len(inCell) != 1 || inCell[0] != tablet.Alias {
		t.Errorf("GetTabletsByCell: want [%v], got %v", tablet.Alias, inCell)
	}

	ti.State = topo.STATE_READ_ONLY
	if err := topo.UpdateTablet(ctx, ts, ti); err != nil {
		t.Errorf("UpdateTablet: %v", err)
	}

	ti, err = ts.GetTablet(tablet.Alias)
	if err != nil {
		t.Errorf("GetTablet %v: %v", tablet.Alias, err)
	}
	if want := topo.STATE_READ_ONLY; ti.State != want {
		t.Errorf("ti.State: want %v, got %v", want, ti.State)
	}

	if err := ts.UpdateTabletFields(tablet.Alias, func(t *topo.Tablet) error {
		t.State = topo.STATE_READ_WRITE
		return nil
	}); err != nil {
		t.Errorf("UpdateTabletFields: %v", err)
	}
	ti, err = ts.GetTablet(tablet.Alias)
	if err != nil {
		t.Errorf("GetTablet %v: %v", tablet.Alias, err)
	}

	if want := topo.STATE_READ_WRITE; ti.State != want {
		t.Errorf("ti.State: want %v, got %v", want, ti.State)
	}

	if err := ts.DeleteTablet(tablet.Alias); err != nil {
		t.Errorf("DeleteTablet: %v", err)
	}
	if err := ts.DeleteTablet(tablet.Alias); err != topo.ErrNoNode {
		t.Errorf("DeleteTablet(again): %v", err)
	}

	if _, err := ts.GetTablet(tablet.Alias); err != topo.ErrNoNode {
		t.Errorf("GetTablet: expected error, tablet was deleted: %v", err)
	}

}