|
| 1 | +package nomad |
| 2 | + |
| 3 | +import ( |
| 4 | + "encoding/json" |
| 5 | + "fmt" |
| 6 | + "strconv" |
| 7 | + |
| 8 | + "github.com/falcosecurity/plugin-sdk-go/pkg/sdk" |
| 9 | + "github.com/hashicorp/nomad/api" |
| 10 | +) |
| 11 | + |
| 12 | +// This method is mandatory the field extraction capability. |
| 13 | +// If the Extract method is defined, the framework expects an Fields method |
| 14 | +// to be specified too. |
| 15 | +func (p *Plugin) Extract(req sdk.ExtractRequest, evt sdk.EventReader) error { |
| 16 | + var event api.Event |
| 17 | + encoder := json.NewDecoder(evt.Reader()) |
| 18 | + if err := encoder.Decode(&event); err != nil { |
| 19 | + return err |
| 20 | + } |
| 21 | + |
| 22 | + switch req.Field() { |
| 23 | + case "nomad.index": |
| 24 | + req.SetValue(event.Index) |
| 25 | + case "nomad.alloc.name": |
| 26 | + alloc, err := event.Allocation() |
| 27 | + if err == nil { |
| 28 | + req.SetValue(string(alloc.Name)) |
| 29 | + } |
| 30 | + case "nomad.alloc.namespace": |
| 31 | + alloc, err := event.Allocation() |
| 32 | + if err == nil { |
| 33 | + req.SetValue(string(alloc.Namespace)) |
| 34 | + } |
| 35 | + case "nomad.alloc.jobID": |
| 36 | + alloc, err := event.Allocation() |
| 37 | + if err == nil { |
| 38 | + req.SetValue(string(alloc.JobID)) |
| 39 | + } |
| 40 | + case "nomad.alloc.clientStatus": |
| 41 | + alloc, err := event.Allocation() |
| 42 | + if err == nil { |
| 43 | + req.SetValue(string(alloc.ClientStatus)) |
| 44 | + } |
| 45 | + case "nomad.alloc.taskStates.type": |
| 46 | + var driver []string |
| 47 | + alloc, err := event.Allocation() |
| 48 | + if err == nil { |
| 49 | + for _, task := range alloc.TaskStates { |
| 50 | + for _, taskEvent := range task.Events { |
| 51 | + if taskEvent.Type == "Driver" { |
| 52 | + driver = append(driver, taskEvent.Type) |
| 53 | + } |
| 54 | + } |
| 55 | + } |
| 56 | + } |
| 57 | + req.SetValue(driver) |
| 58 | + case "nomad.alloc.res.cpu": |
| 59 | + alloc, err := event.Allocation() |
| 60 | + if err == nil { |
| 61 | + req.SetValue(uint64(*alloc.Resources.CPU)) |
| 62 | + } |
| 63 | + case "nomad.alloc.res.cores": |
| 64 | + alloc, err := event.Allocation() |
| 65 | + if err == nil { |
| 66 | + req.SetValue(uint64(*alloc.Resources.Cores)) |
| 67 | + } |
| 68 | + case "nomad.alloc.res.diskMB": |
| 69 | + alloc := event.Payload["Allocation"] |
| 70 | + valStr := fmt.Sprintf("%v", alloc.(map[string]interface{})["Resources"].(map[string]interface{})["DiskMB"]) // bug in nomad api. event.Allocation() returns <nil> for alloc.Resources.DiskMB |
| 71 | + value, _ := strconv.ParseUint(valStr, 10, 64) |
| 72 | + req.SetValue(value) |
| 73 | + case "nomad.alloc.res.iops": |
| 74 | + alloc, err := event.Allocation() |
| 75 | + if err == nil { |
| 76 | + req.SetValue(uint64(*alloc.Resources.IOPS)) |
| 77 | + } |
| 78 | + case "nomad.alloc.res.memoryMB": |
| 79 | + alloc := event.Payload["Allocation"] |
| 80 | + valStr := fmt.Sprintf("%v", alloc.(map[string]interface{})["Resources"].(map[string]interface{})["MemoryMB"]) // bug in nomad api. event.Allocation() returns <nil> for alloc.Resources.MemoryMB |
| 81 | + value, _ := strconv.ParseUint(valStr, 10, 64) |
| 82 | + req.SetValue(value) |
| 83 | + case "nomad.alloc.res.memoryMaxMB": |
| 84 | + alloc := event.Payload["Allocation"] |
| 85 | + valStr := fmt.Sprintf("%v", alloc.(map[string]interface{})["Resources"].(map[string]interface{})["MemoryMaxMB"]) // bug in nomad api. event.Allocation() returns <nil> for alloc.Resources.MemoryMaxMB |
| 86 | + value, _ := strconv.ParseUint(valStr, 10, 64) |
| 87 | + req.SetValue(value) |
| 88 | + case "nomad.alloc.images": |
| 89 | + images, err := getAllocImages(&event) |
| 90 | + if err == nil { |
| 91 | + req.SetValue(images) |
| 92 | + } |
| 93 | + case "nomad.alloc.images.tags": |
| 94 | + tags, err := getAllocTags(&event) |
| 95 | + if err == nil { |
| 96 | + req.SetValue(tags) |
| 97 | + } |
| 98 | + case "nomad.alloc.images.repositories": |
| 99 | + repos, err := getAllocRepos(&event) |
| 100 | + if err == nil { |
| 101 | + req.SetValue(repos) |
| 102 | + } |
| 103 | + case "nomad.event.topic": |
| 104 | + req.SetValue(string(event.Topic)) |
| 105 | + case "nomad.event.type": |
| 106 | + req.SetValue(event.Type) |
| 107 | + default: |
| 108 | + return fmt.Errorf("unsupported field: %s", req.Field()) |
| 109 | + } |
| 110 | + |
| 111 | + return nil |
| 112 | +} |
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