| 1 | package hostbox |
| 2 | |
| 3 | import ( |
| 4 | "context" |
| 5 | "crypto/rand" |
| 6 | "crypto/sha256" |
| 7 | "encoding/hex" |
| 8 | "errors" |
| 9 | "fmt" |
| 10 | |
| 11 | "github.com/carlosframework/platform/internal/hostclaim" |
| 12 | "github.com/carlosframework/platform/internal/hostguard" |
| 13 | "github.com/carlosframework/platform/internal/hostwrite" |
| 14 | "github.com/carlosframework/platform/internal/provision" |
| 15 | "github.com/carlosframework/platform/internal/registry" |
| 16 | ) |
| 17 | |
| 18 | func (a ReconcileAdapter) CaptureInventory(ctx context.Context, s RecordSelection, c hostguard.Captured, revision uint64) (InventoryExpectation, error) { |
| 19 | obs, err := hostclaim.Read(ctx, a.Reconciler.Claims, s.Host) |
| 20 | if err != nil { |
| 21 | return InventoryExpectation{}, err |
| 22 | } |
| 23 | if obs.Absent || obs.Claim == nil || obs.Claim.Holder == nil { |
| 24 | return InventoryExpectation{}, ErrChanged |
| 25 | } |
| 26 | h := obs.Claim.Holder |
| 27 | if h.Incarnation != c.Incarnation || h.Stamp != c.Stamp || h.Key != s.Key { |
| 28 | return InventoryExpectation{}, ErrChanged |
| 29 | } |
| 30 | _, etag, err := a.Reconciler.Claims.Get(ctx, s.Key) |
| 31 | if err != nil { |
| 32 | return InventoryExpectation{}, err |
| 33 | } |
| 34 | if etag != s.ETag { |
| 35 | return InventoryExpectation{}, ErrChanged |
| 36 | } |
| 37 | if revision != 0 { |
| 38 | if err := a.inventoryRevision(ctx, s.Host, c, revision); err != nil { |
| 39 | return InventoryExpectation{}, err |
| 40 | } |
| 41 | } |
| 42 | return InventoryExpectation{Revision: revision, RecordKey: s.Key, RecordETag: etag, Target: hostguard.FenceTarget{Host: s.Host, Incarnation: c.Incarnation, Stamp: c.Stamp, Session: h.Session, Box: a.Box, Enrollment: a.Enrollment, ClaimETag: obs.ETag, Op: obs.Claim.Op.ID, Phase: obs.Claim.Op.Phase}}, nil |
| 43 | } |
| 44 | func (a ReconcileAdapter) inventoryRevision(ctx context.Context, host string, c hostguard.Captured, revision uint64) error { |
| 45 | if a.Reconciler.Guard.FenceView == nil { |
| 46 | return ErrUnsupported |
| 47 | } |
| 48 | view, err := a.Reconciler.Guard.FenceView(ctx, host, c) |
| 49 | if err != nil { |
| 50 | return err |
| 51 | } |
| 52 | if view.Schema != 1 || view.Host != host || view.Captured != c || view.Installation.InventoryRevision != revision { |
| 53 | return ErrChanged |
| 54 | } |
| 55 | return nil |
| 56 | } |
| 57 | func (a ReconcileAdapter) RevalidateInventory(ctx context.Context, s RecordSelection, c hostguard.Captured, e InventoryExpectation, revision uint64) error { |
| 58 | fresh, err := a.CaptureInventory(ctx, s, c, revision) |
| 59 | if err != nil { |
| 60 | return err |
| 61 | } |
| 62 | if fresh.Target != e.Target { |
| 63 | return ErrChanged |
| 64 | } |
| 65 | return nil |
| 66 | } |
| 67 | func (a ReconcileAdapter) prepareRemoteInventory(ctx context.Context, s RecordSelection, c hostguard.Captured) error { |
| 68 | _, revision, err := a.Inventory.Snapshot(ctx, s.Host, c) |
| 69 | if err != nil { |
| 70 | return err |
| 71 | } |
| 72 | if revision != 0 { |
| 73 | return nil |
| 74 | } |
| 75 | var expected InventoryExpectation |
| 76 | err = a.Reconciler.Guard.WithLocal(ctx, s.Host, func() error { var err error; expected, err = a.CaptureInventory(ctx, s, c, 0); return err }) |
| 77 | if err != nil { |
| 78 | return err |
| 79 | } |
| 80 | in := StopInventory{Complete: true, Host: s.Host, Incarnation: c.Incarnation, InstallationStamp: c.Stamp, Box: a.Box, Enrollment: a.Enrollment, DirectoryRevision: a.DirectoryRevision} |
| 81 | revision, err = a.Inventory.WriteExpected(ctx, in, expected) |
| 82 | if err != nil { |
| 83 | return err |
| 84 | } |
| 85 | return a.Reconciler.Guard.WithLocal(ctx, s.Host, func() error { return a.RevalidateInventory(ctx, s, c, expected, revision) }) |
| 86 | } |
| 87 | func (a ReconcileAdapter) installRemote(ctx context.Context, rec provision.ClaimRecord, s RecordSelection, r Reconciler, write func(registry.ClaimOwnership) error) error { |
| 88 | if a.Census != nil { |
| 89 | row, err := a.Registry.Get(s.Host) |
| 90 | if err != nil { |
| 91 | return err |
| 92 | } |
| 93 | if row != nil && row.ClaimOwnership.Valid() { |
| 94 | captured := hostguard.Captured{Incarnation: row.ClaimIncarnation, Stamp: row.ClaimStamp} |
| 95 | in, revision, err := a.Inventory.Snapshot(ctx, s.Host, captured) |
| 96 | if err != nil { |
| 97 | return err |
| 98 | } |
| 99 | r.CheckHeld = func(ctx context.Context, obs hostclaim.Observed, selected RecordSelection) error { |
| 100 | if obs.Claim == nil || obs.Claim.Holder == nil || obs.Host != selected.Host || obs.Claim.Holder.Incarnation != selected.Incarnation { |
| 101 | return ErrChanged |
| 102 | } |
| 103 | current, err := a.Registry.Get(selected.Host) |
| 104 | if err != nil { |
| 105 | return err |
| 106 | } |
| 107 | if current == nil || current.ClaimOwnership != row.ClaimOwnership { |
| 108 | return ErrChanged |
| 109 | } |
| 110 | if err := a.inventoryRevision(ctx, selected.Host, captured, revision); err != nil { |
| 111 | return err |
| 112 | } |
| 113 | return a.Census.checkHeldInventory(selected, row.ClaimOwnership, in) |
| 114 | } |
| 115 | } else { |
| 116 | r.CheckHeld = func(context.Context, hostclaim.Observed, RecordSelection) error { return ErrTypedInventory } |
| 117 | } |
| 118 | } |
| 119 | r.CheckLocal = func(context.Context, hostclaim.Observed, RecordSelection) error { return nil } |
| 120 | r.PrepareInventory = a.prepareRemoteInventory |
| 121 | return r.installWithWork(ctx, s, func(work hostwrite.Work) error { |
| 122 | captured, err := r.Guard.Capture(s.Host) |
| 123 | if err != nil { |
| 124 | return err |
| 125 | } |
| 126 | for attempt := 0; attempt < 3; attempt++ { |
| 127 | err = a.registerRemote(ctx, s, captured, work, write) |
| 128 | if !errors.Is(err, ErrChanged) { |
| 129 | return err |
| 130 | } |
| 131 | } |
| 132 | return ErrChanged |
| 133 | }) |
| 134 | } |
| 135 | func (a ReconcileAdapter) registerRemote(ctx context.Context, s RecordSelection, c hostguard.Captured, work hostwrite.Work, write func(registry.ClaimOwnership) error) error { |
| 136 | in, revision, err := a.Inventory.Snapshot(ctx, s.Host, c) |
| 137 | if err != nil { |
| 138 | return err |
| 139 | } |
| 140 | if !in.Complete || in.Host != s.Host || in.Incarnation != c.Incarnation || in.InstallationStamp != c.Stamp || in.Box != a.Box || in.Enrollment != a.Enrollment || in.DirectoryRevision != a.DirectoryRevision { |
| 141 | return ErrTypedInventory |
| 142 | } |
| 143 | sum := sha256.Sum256([]byte(fmt.Sprintf("%s\x00%s\x00%d\x00%s", s.Host, c.Incarnation, c.Stamp, a.Box))) |
| 144 | owner := registry.ClaimOwnership{ClaimIncarnation: c.Incarnation, ClaimStamp: c.Stamp, ClaimOwner: hex.EncodeToString(sum[:])} |
| 145 | index := -1 |
| 146 | for i, e := range in.Entries { |
| 147 | if e.Kind == "route" && e.RelativePath == s.Host { |
| 148 | if index != -1 || e.Ownership != owner.ClaimOwner || e.RowIdentity == "" { |
| 149 | return ErrTypedInventory |
| 150 | } |
| 151 | index = i |
| 152 | owner.ClaimRowID = e.RowIdentity |
| 153 | } |
| 154 | } |
| 155 | if index < 0 { |
| 156 | var id [16]byte |
| 157 | if _, err := rand.Read(id[:]); err != nil { |
| 158 | return err |
| 159 | } |
| 160 | owner.ClaimRowID = hex.EncodeToString(id[:]) |
| 161 | index = len(in.Entries) |
| 162 | in.Entries = append(in.Entries, StopInventoryEntry{Kind: "route", ArtifactID: owner.ClaimRowID, ManagedRoot: "registry", RelativePath: s.Host, RowIdentity: owner.ClaimRowID, Ownership: owner.ClaimOwner, Materialization: "intended"}) |
| 163 | var expected InventoryExpectation |
| 164 | err = work.With(ctx, hostwrite.Identity{}, func() error { var err error; expected, err = a.CaptureInventory(ctx, s, c, revision); return err }) |
| 165 | if err != nil { |
| 166 | return err |
| 167 | } |
| 168 | revision, err = a.Inventory.WriteExpected(ctx, in, expected) |
| 169 | if err != nil { |
| 170 | return err |
| 171 | } |
| 172 | if err = work.With(ctx, hostwrite.Identity{}, func() error { return a.RevalidateInventory(ctx, s, c, expected, revision) }); err != nil { |
| 173 | return err |
| 174 | } |
| 175 | } |
| 176 | var expected InventoryExpectation |
| 177 | err = work.With(ctx, hostwrite.Identity{}, func() error { |
| 178 | var err error |
| 179 | expected, err = a.CaptureInventory(ctx, s, c, revision) |
| 180 | if err != nil { |
| 181 | return err |
| 182 | } |
| 183 | row, err := a.Registry.Get(s.Host) |
| 184 | if err != nil { |
| 185 | return err |
| 186 | } |
| 187 | if row == nil && in.Entries[index].Materialization == "materialized" { |
| 188 | return ErrTypedInventory |
| 189 | } |
| 190 | if row != nil && row.ClaimOwnership != owner { |
| 191 | return registry.ErrClaimOwnership |
| 192 | } |
| 193 | if err = write(owner); err != nil { |
| 194 | return err |
| 195 | } |
| 196 | row, err = a.Registry.Get(s.Host) |
| 197 | if err != nil { |
| 198 | return err |
| 199 | } |
| 200 | if row == nil || row.ClaimOwnership != owner { |
| 201 | return registry.ErrClaimOwnership |
| 202 | } |
| 203 | return nil |
| 204 | }) |
| 205 | if err != nil { |
| 206 | return err |
| 207 | } |
| 208 | if in.Entries[index].Materialization == "materialized" { |
| 209 | return nil |
| 210 | } |
| 211 | in.Entries[index].Materialization = "materialized" |
| 212 | revision, err = a.Inventory.WriteExpected(ctx, in, expected) |
| 213 | if err != nil { |
| 214 | return err |
| 215 | } |
| 216 | return work.With(ctx, hostwrite.Identity{}, func() error { return a.RevalidateInventory(ctx, s, c, expected, revision) }) |
| 217 | } |
| 218 | |
| 219 | func (a ReconcileAdapter) PrepareInstallation(ctx context.Context, s RecordSelection, captured hostguard.Captured) error { |
| 220 | if !a.Inventory.Remote() { |
| 221 | return nil |
| 222 | } |
| 223 | return a.prepareRemoteInventory(ctx, s, captured) |
| 224 | } |
| 225 | |
| 226 | func (a ReconcileAdapter) RegisterLanding(ctx context.Context, observed hostclaim.Observed) error { |
| 227 | if !a.Inventory.Remote() || observed.Claim == nil || observed.Claim.Holder == nil { |
| 228 | return ErrUnsupported |
| 229 | } |
| 230 | c := observed.Claim |
| 231 | if c.Op.Kind != hostclaim.KindLanding || c.Op.Exec != a.Box || c.Op.Intent["target"] != a.Box || (c.Op.Phase != provision.LandChecking && c.Op.Phase != provision.LandConfigured) { |
| 232 | return ErrChanged |
| 233 | } |
| 234 | h := c.Holder |
| 235 | _, etag, err := a.Reconciler.Claims.Get(ctx, h.Key) |
| 236 | if err != nil { |
| 237 | return err |
| 238 | } |
| 239 | s := RecordSelection{Host: c.Host, Key: h.Key, ETag: etag, Incarnation: h.Incarnation, Family: h.Family, Layout: "flat"} |
| 240 | captured := hostguard.Captured{Incarnation: h.Incarnation, Stamp: h.Stamp} |
| 241 | in, rev, err := a.Inventory.Snapshot(ctx, c.Host, captured) |
| 242 | if err != nil { |
| 243 | return err |
| 244 | } |
| 245 | if rev == 0 { |
| 246 | if c.Op.Phase != provision.LandChecking { |
| 247 | return ErrChanged |
| 248 | } |
| 249 | in = StopInventory{Complete: true, Host: c.Host, Incarnation: h.Incarnation, InstallationStamp: h.Stamp, Box: a.Box, Enrollment: a.Enrollment, DirectoryRevision: a.DirectoryRevision} |
| 250 | } |
| 251 | var expected InventoryExpectation |
| 252 | if err = a.Reconciler.Guard.WithLocal(ctx, c.Host, func() error { var e error; expected, e = a.CaptureInventory(ctx, s, captured, rev); return e }); err != nil { |
| 253 | return err |
| 254 | } |
| 255 | rev, err = a.Inventory.WriteExpected(ctx, in, expected) |
| 256 | if err != nil { |
| 257 | return err |
| 258 | } |
| 259 | if err = a.Reconciler.Guard.WithLocal(ctx, c.Host, func() error { return a.RevalidateInventory(ctx, s, captured, expected, rev) }); err != nil { |
| 260 | return err |
| 261 | } |
| 262 | |
| 263 | return nil |
| 264 | } |
| 265 | |
amadan