| 1 | package host |
| 2 | |
| 3 | import ( |
| 4 | "context" |
| 5 | "log" |
| 6 | "net/http" |
| 7 | "os" |
| 8 | "path/filepath" |
| 9 | "time" |
| 10 | |
| 11 | "github.com/carlosframework/platform/internal/hostwrite" |
| 12 | "github.com/carlosframework/platform/internal/instancectl" |
| 13 | "github.com/carlosframework/platform/internal/moves" |
| 14 | "github.com/carlosframework/platform/internal/registry" |
| 15 | "github.com/carlosframework/platform/internal/release" |
| 16 | "github.com/carlosframework/platform/internal/rootparticipation" |
| 17 | ) |
| 18 | |
| 19 | func RunInstanceControl(args []string) { |
| 20 | ctx, cancel := context.WithCancel(context.Background()) |
| 21 | defer cancel() |
| 22 | if err := registerProductionLaunchVerifier(); err != nil { |
| 23 | log.Fatal(err) |
| 24 | } |
| 25 | if hostwrite.Enabled(os.Getenv) { |
| 26 | if err := claimRecoveryReady(rootparticipation.OpenForUpdate); err != nil { |
| 27 | log.Print(&ClaimDependencyError{Contracts: []string{"census", "registered verifier", "flag must stay off until Part 3 (G)"}}) |
| 28 | return |
| 29 | } |
| 30 | } |
| 31 | ctx, err := claimEntryContext(ctx, os.Getenv, openDeployStore) |
| 32 | if err != nil { |
| 33 | log.Fatal(err) |
| 34 | } |
| 35 | if !hostwrite.Enabled(claimEntryEnv(ctx)) { |
| 36 | instancectl.RunWithRegistry(args, instanceRegistryHostApp(nil)) |
| 37 | return |
| 38 | } |
| 39 | reg, err := openServiceRegistry(filepath.Join(dataDir(), "registry.db")) |
| 40 | if err != nil { |
| 41 | log.Fatal(err) |
| 42 | } |
| 43 | defer reg.Close() |
| 44 | ctx = withClaimRuntimeResources(ctx, ClaimRuntimeResources{Mode: "instance-control", Registry: reg, DataDir: dataDir(), OptDir: release.OptDir(), UnitsDir: "/etc/systemd/system"}) |
| 45 | ctx, err = ensureProductionClaimAssembly(ctx) |
| 46 | if err != nil { |
| 47 | log.Fatal(err) |
| 48 | } |
| 49 | entry, _ := ctx.Value(claimEntryKey{}).(claimEntry) |
| 50 | defer func() { |
| 51 | cleanup, cancel := context.WithTimeout(context.Background(), 30*time.Second) |
| 52 | defer cancel() |
| 53 | if err := entry.Assembly.Close(cleanup); err != nil { |
| 54 | log.Printf("instance-control: host claims shutdown: %v", err) |
| 55 | } |
| 56 | }() |
| 57 | startup, finishStartup := context.WithTimeout(ctx, 2*time.Minute) |
| 58 | defer finishStartup() |
| 59 | handler, err := NewProductionRootClaimStop(startup) |
| 60 | if err != nil { |
| 61 | log.Fatal(err) |
| 62 | } |
| 63 | execution := handler.(ClaimRootHTTP).executionRuntime |
| 64 | defer func() { |
| 65 | cleanup, cancel := context.WithTimeout(context.Background(), 30*time.Second) |
| 66 | defer cancel() |
| 67 | if err := execution.Close(cleanup); err != nil { |
| 68 | log.Printf("instance-control: host claims shutdown: %v", err) |
| 69 | } |
| 70 | }() |
| 71 | handler, err = WithProductionClaimLaunch(startup, handler) |
| 72 | if err != nil { |
| 73 | log.Fatal(err) |
| 74 | } |
| 75 | // moves Task 7b: root's held release, only with CARLOS_MOVES_PHASE1 on. |
| 76 | handler, err = WithProductionMovesHeldRelease(startup, handler, reg, claimEntryEnv(ctx)) |
| 77 | if err != nil { |
| 78 | log.Fatal(err) |
| 79 | } |
| 80 | if err := activateClaimRoot(ctx, startup, handler); err != nil { |
| 81 | log.Fatal(err) |
| 82 | } |
| 83 | finishStartup() |
| 84 | fenceDone := make(chan struct{}) |
| 85 | go func() { defer close(fenceDone); runHostFencePass(ctx) }() |
| 86 | defer func() { cancel(); <-fenceDone }() |
| 87 | instancectl.RunWithClaim(args, handler, heldReleaseRouteHandler(handler, claimEntryEnv(ctx)), rootInstallationHostApp(entry.Assembly.Guard, entry.Assembly.Claims)) |
| 88 | } |
| 89 | |
| 90 | func activateClaimRoot(ctx, startup context.Context, handler http.Handler) error { |
| 91 | recovery, ok := handler.(interface{ RecoverPending(context.Context) error }) |
| 92 | if !ok { |
| 93 | return ErrClaimStopUnavailable |
| 94 | } |
| 95 | if err := recovery.RecoverPending(startup); err != nil { |
| 96 | log.Print(err) |
| 97 | } |
| 98 | if err := claimActivationReady(startup, rootparticipation.OpenForUpdate); err != nil { |
| 99 | return err |
| 100 | } |
| 101 | lifecycle, ok := handler.(interface{ Start(context.Context) }) |
| 102 | if !ok { |
| 103 | return ErrClaimStopUnavailable |
| 104 | } |
| 105 | lifecycle.Start(ctx) |
| 106 | return nil |
| 107 | } |
| 108 | |
| 109 | // heldReleaseRouteHandler is the handler instancectl registers for the moves |
| 110 | // held-release route: the claim root (which answers the path itself, |
| 111 | // refusing while no held release is wired) only with both CARLOS_HOST_CLAIM |
| 112 | // and CARLOS_MOVES_PHASE1 on; otherwise nil, so the route is not registered |
| 113 | // and main's 404 stands (whole-branch fixes, item 6). |
| 114 | func heldReleaseRouteHandler(handler http.Handler, getenv func(string) string) http.Handler { |
| 115 | if handler == nil || getenv == nil || !hostwrite.Enabled(getenv) || !moves.Enabled(getenv) { |
| 116 | return nil |
| 117 | } |
| 118 | return handler |
| 119 | } |
| 120 | |
| 121 | func instanceRegistryHostApp(shared *registry.Registry) func(string) (string, string, error) { |
| 122 | return func(host string) (string, string, error) { |
| 123 | reg := shared |
| 124 | if reg == nil { |
| 125 | var err error |
| 126 | reg, err = openServiceRegistryReadOnly(filepath.Join(dataDir(), "registry.db")) |
| 127 | if err != nil { |
| 128 | return "", "", err |
| 129 | } |
| 130 | defer reg.Close() |
| 131 | } |
| 132 | row, err := reg.Get(host) |
| 133 | if err != nil { |
| 134 | return "", "", err |
| 135 | } |
| 136 | if row == nil { |
| 137 | return "", "", os.ErrNotExist |
| 138 | } |
| 139 | return row.Account, row.App, nil |
| 140 | } |
| 141 | } |
| 142 | |
| 143 | func claimActivationReady(ctx context.Context, open func() (rootparticipation.Ledger, bool, error)) error { |
| 144 | l, required, err := open() |
| 145 | if l.State != nil { |
| 146 | defer l.State.Close() |
| 147 | } |
| 148 | if err != nil { |
| 149 | return err |
| 150 | } |
| 151 | if !required { |
| 152 | return rootparticipation.ErrUnavailable |
| 153 | } |
| 154 | ctx, cancel := context.WithTimeout(ctx, 5*time.Second) |
| 155 | defer cancel() |
| 156 | return l.WithLaunchExclusion(ctx, l.ActivationReady) |
| 157 | } |
| 158 | |
| 159 | func claimRecoveryReady(open func() (rootparticipation.Ledger, bool, error)) error { |
| 160 | l, required, err := open() |
| 161 | if l.State != nil { |
| 162 | defer l.State.Close() |
| 163 | } |
| 164 | if err != nil { |
| 165 | return err |
| 166 | } |
| 167 | if !required { |
| 168 | return rootparticipation.ErrUnavailable |
| 169 | } |
| 170 | _, err = l.RecoveryCensus() |
| 171 | return err |
| 172 | } |
| 173 | |
amadan