| 1 | package host |
| 2 | |
| 3 | import ( |
| 4 | "context" |
| 5 | "errors" |
| 6 | "flag" |
| 7 | "io" |
| 8 | "log" |
| 9 | "os" |
| 10 | "os/signal" |
| 11 | "os/user" |
| 12 | "path/filepath" |
| 13 | "strconv" |
| 14 | "syscall" |
| 15 | "time" |
| 16 | |
| 17 | "github.com/carlosframework/platform/internal/activator" |
| 18 | "github.com/carlosframework/platform/internal/cgroup" |
| 19 | "github.com/carlosframework/platform/internal/controlsock" |
| 20 | "github.com/carlosframework/platform/internal/hostbox" |
| 21 | "github.com/carlosframework/platform/internal/hostclaim" |
| 22 | "github.com/carlosframework/platform/internal/hostwrite" |
| 23 | "github.com/carlosframework/platform/internal/release" |
| 24 | ) |
| 25 | |
| 26 | var errFilesSeedDelegation = errors.New("run through carlos-edge.service with delegation enabled; a standalone shell cannot prepare this host") |
| 27 | |
| 28 | func parseFilesSeed(args []string) (string, error) { |
| 29 | if len(args) == 0 || args[0] != "seed" { |
| 30 | return "", hostbox.ErrUnsupported |
| 31 | } |
| 32 | fs := flag.NewFlagSet("system files seed", flag.ContinueOnError) |
| 33 | fs.SetOutput(io.Discard) |
| 34 | host := fs.String("host", "", "") |
| 35 | if err := fs.Parse(args[1:]); err != nil { |
| 36 | return "", err |
| 37 | } |
| 38 | if fs.NArg() != 0 { |
| 39 | return "", hostbox.ErrUnsupported |
| 40 | } |
| 41 | if *host != "" { |
| 42 | if _, err := hostclaim.Key(*host); err != nil { |
| 43 | return "", err |
| 44 | } |
| 45 | } |
| 46 | return *host, nil |
| 47 | } |
| 48 | |
| 49 | func RunSystemFiles(args []string) { |
| 50 | signalCtx, cancel := signal.NotifyContext(context.Background(), syscall.SIGTERM, os.Interrupt) |
| 51 | defer cancel() |
| 52 | ctx, finish := activator.WithCleanupBudget(signalCtx, 30*time.Second) |
| 53 | defer finish() |
| 54 | if err := runSystemFiles(ctx, args, os.Stdout); err != nil { |
| 55 | log.Printf("Files seed failed: %s.", err) |
| 56 | os.Exit(filesSeedExitCode(err)) |
| 57 | } |
| 58 | } |
| 59 | |
| 60 | func filesSeedExitCode(err error) int { |
| 61 | if err == nil { |
| 62 | return 0 |
| 63 | } |
| 64 | var incomplete filesSeedIncompleteError |
| 65 | if errors.As(err, &incomplete) { |
| 66 | return 2 |
| 67 | } |
| 68 | return 1 |
| 69 | } |
| 70 | |
| 71 | func runSystemFiles(ctx context.Context, args []string, out io.Writer) error { |
| 72 | host, err := parseFilesSeed(args) |
| 73 | if err != nil { |
| 74 | return err |
| 75 | } |
| 76 | if !hostwrite.Enabled(os.Getenv) || os.Getenv("CARLOS_HOST_CLAIM_ORIGINS") != "1" { |
| 77 | return errors.New("CARLOS_HOST_CLAIM and CARLOS_HOST_CLAIM_ORIGINS must both be set; CARLOS_MOVES_PHASE1 is not required") |
| 78 | } |
| 79 | u, err := user.Lookup("carlos") |
| 80 | if err != nil { |
| 81 | return errFilesSeedDelegation |
| 82 | } |
| 83 | uid, err := strconv.Atoi(u.Uid) |
| 84 | if err != nil || uid == 0 || os.Geteuid() != uid { |
| 85 | return errFilesSeedDelegation |
| 86 | } |
| 87 | pid, err := filesSeedEdgePID(ctx) |
| 88 | if err != nil { |
| 89 | return errFilesSeedDelegation |
| 90 | } |
| 91 | if pid != os.Getpid() { |
| 92 | return filesSeedClient(ctx, host, out, uid) |
| 93 | } |
| 94 | manager, err := filesSeedManager(ctx) |
| 95 | if err != nil { |
| 96 | return err |
| 97 | } |
| 98 | // This capability runs root's peer and delegated-cgroup validation before |
| 99 | // registry construction, classification, stop, lease or retry mutation. |
| 100 | root := NewClaimRoleRootClient(controlsock.Path) |
| 101 | if err := root.KindCapability(ctx, "files-seed"); err != nil { |
| 102 | return errors.Join(errFilesSeedDelegation, err) |
| 103 | } |
| 104 | return runFilesSeedOneShot(ctx, host, out, manager) |
| 105 | } |
| 106 | |
| 107 | func runFilesSeedOneShot(ctx context.Context, host string, out io.Writer, manager *cgroup.Manager) (resultErr error) { |
| 108 | if manager == nil { |
| 109 | return errFilesSeedDelegation |
| 110 | } |
| 111 | ctx, err := claimEntryContext(ctx, os.Getenv, openDeployStore) |
| 112 | if err != nil { |
| 113 | return err |
| 114 | } |
| 115 | dd := dataDir() |
| 116 | reg, err := openServiceRegistry(filepath.Join(dd, "registry.db")) |
| 117 | if err != nil { |
| 118 | return err |
| 119 | } |
| 120 | safeToClose := true |
| 121 | defer func() { |
| 122 | if safeToClose { |
| 123 | resultErr = errors.Join(resultErr, reg.Close()) |
| 124 | } |
| 125 | }() |
| 126 | if err := registerProductionClaimFiles(claimEntryEnv(ctx), dd, reg); err != nil { |
| 127 | return err |
| 128 | } |
| 129 | resources := ClaimRuntimeResources{Mode: "agent", Registry: reg, Manager: manager, DataDir: dd, OptDir: release.OptDir(), UnitsDir: "/etc/systemd/system"} |
| 130 | ctx = withClaimRuntimeResources(ctx, resources) |
| 131 | ctx, err = ensureProductionClaimAssembly(ctx) |
| 132 | if err != nil { |
| 133 | return err |
| 134 | } |
| 135 | entry, _ := ctx.Value(claimEntryKey{}).(claimEntry) |
| 136 | a := entry.Assembly |
| 137 | if a == nil { |
| 138 | return hostbox.ErrUnsupported |
| 139 | } |
| 140 | var executor *filesSeedExecutor |
| 141 | defer func() { |
| 142 | cleanup, cancel := activator.CleanupContext(ctx, 30*time.Second) |
| 143 | defer cancel() |
| 144 | if executor != nil { |
| 145 | if err := executor.close(cleanup); err != nil { |
| 146 | safeToClose = false |
| 147 | resultErr = errors.Join(resultErr, err) |
| 148 | } |
| 149 | } |
| 150 | if safeToClose { |
| 151 | closeErr := a.Close(cleanup) |
| 152 | resultErr = errors.Join(resultErr, closeErr) |
| 153 | if closeErr != nil { |
| 154 | safeToClose = false |
| 155 | } |
| 156 | } |
| 157 | }() |
| 158 | if _, err := a.Build(ctx); err != nil { |
| 159 | return err |
| 160 | } |
| 161 | source, ok := productionClaimFilesSource().(*movesFilesSource) |
| 162 | if !ok { |
| 163 | return hostbox.ErrUnsupported |
| 164 | } |
| 165 | executor = &filesSeedExecutor{assembly: a, service: &activator.Service{}, registry: reg, source: source} |
| 166 | return executor.run(ctx, host, out) |
| 167 | } |
| 168 | |
amadan