| 1 | //go:build linux |
| 2 | |
| 3 | package host |
| 4 | |
| 5 | import ( |
| 6 | "context" |
| 7 | "log" |
| 8 | "reflect" |
| 9 | |
| 10 | "github.com/carlosframework/platform/internal/hostbox" |
| 11 | ) |
| 12 | |
| 13 | func (p *servingParkRoot) commitServingReboot(ctx context.Context, id string) error { |
| 14 | return p.prepareOrCommitServingReboot(ctx, id, true) |
| 15 | } |
| 16 | |
| 17 | // The namespace binding is durable first. An unbound record still carries its |
| 18 | // old boot and every filesystem effect refuses it, including reused mount IDs. |
| 19 | // A lost reply at either write is replayed against fresh independent evidence. |
| 20 | func (l *servingParkLedger) commitRebootLocked(ctx context.Context, saved servingParkRecord, active *servingParkRebootAuthority) error { |
| 21 | fresh, err := l.observeRebootPreparation(ctx, saved, active) |
| 22 | if err != nil { |
| 23 | return err |
| 24 | } |
| 25 | body, err := l.state.Read(servingNamespacePreparationName(saved.Authorization.ID, fresh.Observation.Topology)) |
| 26 | if err != nil { |
| 27 | return err |
| 28 | } |
| 29 | var prepared servingParkRebootPreparation |
| 30 | if servingParkDecode(body, &prepared) != nil || !reflect.DeepEqual(prepared, fresh) { |
| 31 | return hostbox.ErrChanged |
| 32 | } |
| 33 | t := fresh.Observation.Topology |
| 34 | namespace := servingParkBootBinding{Version: 1, ID: "namespace", BeforeBoot: t.Previous.BootID, BootID: t.BootID, BeforeParent: t.Previous.Parent, Parent: t.CurrentParent} |
| 35 | if err := ctx.Err(); err != nil { |
| 36 | return err |
| 37 | } |
| 38 | if err := l.write("current-namespace.json", namespace); err != nil { |
| 39 | return err |
| 40 | } |
| 41 | again, err := l.observeRebootPreparation(ctx, saved, active) |
| 42 | if err != nil { |
| 43 | return err |
| 44 | } |
| 45 | if !reflect.DeepEqual(fresh, again) { |
| 46 | return hostbox.ErrChanged |
| 47 | } |
| 48 | record := servingParkBootBinding{Version: 1, ID: "retirement-" + saved.Authorization.ID, BeforeBoot: saved.Source.BootID, BootID: t.BootID, BeforeParent: saved.Source.Parent, Parent: t.CurrentParent} |
| 49 | if err := ctx.Err(); err != nil { |
| 50 | return err |
| 51 | } |
| 52 | prior, err := servingParkReadBinding(l.state, record.ID) |
| 53 | if err != nil { |
| 54 | return err |
| 55 | } |
| 56 | if saved.Source.Volume != "" && saved.Source.Volume == t.Volume && (prior == nil || prior.Volume != "") { |
| 57 | record.Volume = t.Volume |
| 58 | } else { |
| 59 | log.Printf("Host %q: serving database retirement %q retained: %s.", saved.Authorization.Successor.Host, saved.Authorization.ID, hostbox.ErrChanged) |
| 60 | } |
| 61 | return l.write("current-"+record.ID+".json", record) |
| 62 | } |
| 63 | |
| 64 | func (f *servingParkFS) readNamespace() (servingParkNamespace, error) { |
| 65 | var n servingParkNamespace |
| 66 | body, err := f.state.Read("namespace.json") |
| 67 | if err != nil { |
| 68 | return n, err |
| 69 | } |
| 70 | if servingParkDecode(body, &n) != nil { |
| 71 | return n, hostbox.ErrChanged |
| 72 | } |
| 73 | b, err := servingParkReadBinding(f.state, "namespace") |
| 74 | if err != nil || b == nil { |
| 75 | return n, err |
| 76 | } |
| 77 | if n.BootID != b.BeforeBoot || n.Parent != b.BeforeParent { |
| 78 | return n, hostbox.ErrChanged |
| 79 | } |
| 80 | n.BootID = b.BootID |
| 81 | if err = b.directory(&n.Parent, false); err != nil { |
| 82 | return n, err |
| 83 | } |
| 84 | err = b.directory(&n.Root, false) |
| 85 | return n, err |
| 86 | } |
| 87 | |
amadan