| 1 | package host |
| 2 | |
| 3 | import ( |
| 4 | "context" |
| 5 | "github.com/carlosframework/platform/internal/awsinv" |
| 6 | "github.com/carlosframework/platform/internal/hostactors" |
| 7 | "github.com/carlosframework/platform/internal/hostfence" |
| 8 | "github.com/carlosframework/platform/internal/hostfloor" |
| 9 | "github.com/carlosframework/platform/internal/release" |
| 10 | "log" |
| 11 | "os" |
| 12 | "strings" |
| 13 | "time" |
| 14 | ) |
| 15 | |
| 16 | func runHostFencePass(ctx context.Context) { |
| 17 | if strings.TrimSpace(os.Getenv("CARLOS_HOST_CLAIM")) == "" || os.Getenv("CARLOS_FLEET") != "" { |
| 18 | return |
| 19 | } |
| 20 | runHostFenceLoop(ctx, 10*time.Minute, hostFenceOnce) |
| 21 | } |
| 22 | func runHostFenceLoop(ctx context.Context, interval time.Duration, once func(context.Context) error) { |
| 23 | ticker := time.NewTicker(interval) |
| 24 | defer ticker.Stop() |
| 25 | for { |
| 26 | if ctx.Err() != nil { |
| 27 | return |
| 28 | } |
| 29 | pass, cancel := context.WithTimeout(ctx, 2*time.Minute) |
| 30 | err := once(pass) |
| 31 | cancel() |
| 32 | if err != nil { |
| 33 | log.Printf("host fence pass: %v", err) |
| 34 | } |
| 35 | select { |
| 36 | case <-ctx.Done(): |
| 37 | return |
| 38 | case <-ticker.C: |
| 39 | } |
| 40 | } |
| 41 | } |
| 42 | func hostFenceOnce(ctx context.Context) error { |
| 43 | fences, err := hostfence.OpenRootFenceStore(ctx, os.Getenv("CARLOS_DEPLOYMENT_BUCKET")) |
| 44 | if err != nil { |
| 45 | return err |
| 46 | } |
| 47 | store, pub, err := openSystemStore(ctx) |
| 48 | if err != nil { |
| 49 | return err |
| 50 | } |
| 51 | enrollment, err := hostfloor.ReadEnrollment("/etc/carlos/host-actor.json") |
| 52 | if err != nil { |
| 53 | return err |
| 54 | } |
| 55 | d := hostactors.Directory{Store: store, PublicKey: pub, Bucket: os.Getenv("CARLOS_DEPLOYMENT_BUCKET")} |
| 56 | worker := hostfence.TerminationWorker{Fences: fences, Enabled: true, Directory: d, Self: hostfence.Worker{Box: enrollment.Box, Enrollment: enrollment.Enrollment}, Reader: awsinv.NewEC2Reader, Now: time.Now} |
| 57 | floor, err := hostfloor.Read(ctx, store, pub, d.Bucket) |
| 58 | if err == nil { |
| 59 | local, loadErr := floorDisk(release.OptDir()) |
| 60 | if loadErr != nil { |
| 61 | err = loadErr |
| 62 | } else { |
| 63 | _, armed, e := local.Load() |
| 64 | if e != nil { |
| 65 | err = e |
| 66 | } else if armed.Digest != floor.Digest { |
| 67 | err = hostfloor.ErrFloor |
| 68 | } |
| 69 | } |
| 70 | } |
| 71 | if err == nil { |
| 72 | roster, e := d.Read(ctx) |
| 73 | err = e |
| 74 | if e == nil { |
| 75 | self := roster.Roster.Boxes[enrollment.Box] |
| 76 | for ref, box := range roster.Roster.Boxes { |
| 77 | if ref == enrollment.Box || box.Region != self.Region || box.State == "retired" { |
| 78 | continue |
| 79 | } |
| 80 | if _, fenceErr := worker.Describe(ctx, ref); fenceErr != nil { |
| 81 | log.Printf("host fence %s: awaiting verified termination: %v", ref, fenceErr) |
| 82 | } |
| 83 | } |
| 84 | } |
| 85 | } |
| 86 | return err |
| 87 | } |
| 88 | |
amadan