| 1 | package host |
| 2 | |
| 3 | import ( |
| 4 | "context" |
| 5 | "encoding/json" |
| 6 | "errors" |
| 7 | "github.com/carlosframework/platform/internal/hostops" |
| 8 | "github.com/carlosframework/platform/internal/hostwrite" |
| 9 | "github.com/carlosframework/platform/internal/instancectl" |
| 10 | "github.com/carlosframework/platform/internal/provision" |
| 11 | "github.com/carlosframework/platform/internal/registry" |
| 12 | "github.com/carlosframework/platform/internal/release" |
| 13 | "github.com/carlosframework/platform/internal/rootstate" |
| 14 | "io/fs" |
| 15 | "os" |
| 16 | "path/filepath" |
| 17 | "slices" |
| 18 | "strings" |
| 19 | ) |
| 20 | |
| 21 | const claimNamedUnit4aComplete = false |
| 22 | |
| 23 | var openClaimActivationState = rootstate.Open |
| 24 | |
| 25 | func claimActivationPreflight(reg *registry.Registry) error { |
| 26 | if reg == nil { |
| 27 | return hostwrite.ErrUnavailable |
| 28 | } |
| 29 | if claimNamedUnit4aComplete { |
| 30 | return nil |
| 31 | } |
| 32 | routes, err := reg.List() |
| 33 | if err != nil { |
| 34 | return err |
| 35 | } |
| 36 | for _, route := range routes { |
| 37 | if route.Unit != "" || route.Backing == "unit" { |
| 38 | return hostwrite.ErrUnavailable |
| 39 | } |
| 40 | } |
| 41 | return nil |
| 42 | } |
| 43 | |
| 44 | func claimActivationVerified(ctx context.Context, store release.Store, r ClaimRuntimeResources) error { |
| 45 | if claimNamedUnit4aComplete { |
| 46 | return nil |
| 47 | } |
| 48 | apps, err := hostops.Apps(ctx, store) |
| 49 | if err != nil { |
| 50 | return err |
| 51 | } |
| 52 | cfg := provisionTickConfig(os.Getenv) |
| 53 | for _, app := range apps { |
| 54 | records, err := hostops.Records(ctx, store, app.Account, app.Name) |
| 55 | if err != nil { |
| 56 | return err |
| 57 | } |
| 58 | for _, row := range records { |
| 59 | if row.Holder.Family != "instance" { |
| 60 | continue |
| 61 | } |
| 62 | var rec provision.Record |
| 63 | if json.Unmarshal(row.Body, &rec) != nil { |
| 64 | return hostwrite.ErrUnavailable |
| 65 | } |
| 66 | if rec.Region != "" && rec.Region != cfg.Region || rec.Pool != "" && !slices.Contains(cfg.Pools, rec.Pool) { |
| 67 | continue |
| 68 | } |
| 69 | if rec.Unit != "" { |
| 70 | return hostwrite.ErrUnavailable |
| 71 | } |
| 72 | } |
| 73 | } |
| 74 | if err := claimActivationLocalUnits(r); err != nil { |
| 75 | return err |
| 76 | } |
| 77 | if r.Mode == "agent" { |
| 78 | return nil |
| 79 | } |
| 80 | shapes, err := productionClaimUnitShapes() |
| 81 | if err != nil { |
| 82 | return err |
| 83 | } |
| 84 | if len(shapes) != 0 { |
| 85 | return hostwrite.ErrUnavailable |
| 86 | } |
| 87 | for _, dir := range []string{"/var/lib/carlos-claims/unit-bindings", "/var/lib/carlos-claims/unit-materializations"} { |
| 88 | state, err := openClaimActivationState(dir, false, false) |
| 89 | if errors.Is(err, os.ErrNotExist) { |
| 90 | continue |
| 91 | } |
| 92 | if err != nil { |
| 93 | return err |
| 94 | } |
| 95 | names, err := state.Names() |
| 96 | state.Close() |
| 97 | if err != nil { |
| 98 | return err |
| 99 | } |
| 100 | for _, name := range names { |
| 101 | if !strings.HasSuffix(name, ".lock") { |
| 102 | return hostwrite.ErrUnavailable |
| 103 | } |
| 104 | } |
| 105 | } |
| 106 | return nil |
| 107 | } |
| 108 | |
| 109 | func claimActivationLocalUnits(r ClaimRuntimeResources) error { |
| 110 | if r.Mode != "agent" && os.Geteuid() == 0 { |
| 111 | for _, dir := range []string{"/var/lib/carlos-app", "/var/lib/private/carlos-app"} { |
| 112 | entries, err := os.ReadDir(dir) |
| 113 | if errors.Is(err, os.ErrNotExist) { |
| 114 | continue |
| 115 | } |
| 116 | if err != nil { |
| 117 | return err |
| 118 | } |
| 119 | if len(entries) != 0 { |
| 120 | return hostwrite.ErrUnavailable |
| 121 | } |
| 122 | } |
| 123 | } |
| 124 | for _, dir := range []string{r.UnitsDir, "/etc/systemd/system", "/run/systemd/system", "/usr/lib/systemd/system", "/lib/systemd/system", "/etc/carlos/apps"} { |
| 125 | if dir == "" { |
| 126 | continue |
| 127 | } |
| 128 | err := filepath.WalkDir(dir, func(path string, entry fs.DirEntry, err error) error { |
| 129 | if errors.Is(err, os.ErrNotExist) && path == dir { |
| 130 | return nil |
| 131 | } |
| 132 | if err != nil { |
| 133 | return err |
| 134 | } |
| 135 | name := entry.Name() |
| 136 | if strings.HasPrefix(name, "carlos-app@") && name != "carlos-app@.service" && name != "carlos-app@.socket" { |
| 137 | return hostwrite.ErrUnavailable |
| 138 | } |
| 139 | if entry.IsDir() { |
| 140 | if r.Mode == "agent" && filepath.Dir(path) == "/run/systemd/system" && strings.HasSuffix(name, ".d") { |
| 141 | role, _, ordinary := instancectl.ParseUnitName(strings.TrimSuffix(name, ".d")) |
| 142 | if ordinary && role == instancectl.RoleRun { |
| 143 | return fs.SkipDir |
| 144 | } |
| 145 | } |
| 146 | return nil |
| 147 | } |
| 148 | if dir == "/etc/carlos/apps" { |
| 149 | return hostwrite.ErrUnavailable |
| 150 | } |
| 151 | if !strings.HasSuffix(name, ".service") && !strings.HasSuffix(name, ".conf") { |
| 152 | return nil |
| 153 | } |
| 154 | if _, err := unitsFS.ReadFile("units/" + name); err == nil { |
| 155 | return nil |
| 156 | } |
| 157 | raw, err := os.ReadFile(path) |
| 158 | if err != nil { |
| 159 | return err |
| 160 | } |
| 161 | for _, marker := range []string{filepath.Join(r.OptDir, "live") + "/", "/opt/carlos/live/", "/etc/carlos/apps/", "User=carlos", "User = carlos"} { |
| 162 | if strings.Contains(string(raw), marker) { |
| 163 | return hostwrite.ErrUnavailable |
| 164 | } |
| 165 | } |
| 166 | return nil |
| 167 | }) |
| 168 | if err != nil { |
| 169 | return err |
| 170 | } |
| 171 | } |
| 172 | return nil |
| 173 | } |
| 174 | |
amadan