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[NETOBSERV-44] Consumming goflow2 as a library. #6
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| @@ -1,15 +1,20 @@ | ||
| FROM registry.access.redhat.com/ubi8/go-toolset:1.15.14-10 as builder | ||
| ARG VERSION="" | ||
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| WORKDIR /opt/app-root/src | ||
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| COPY go.mod ./ | ||
| COPY go.sum ./ | ||
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| RUN go mod download | ||
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There was a problem hiding this comment. this will surely change in the future if we want to include vendors in sources as Mario did for the loki client. But we can do that as a follow-up. |
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| COPY . . | ||
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| RUN go build -ldflags "-X main.version=${VERSION}" -o kube-enricher cmd/kube-enricher/main.go | ||
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| FROM registry.access.redhat.com/ubi8/ubi-minimal:8.4-210 | ||
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| COPY --from=builder /opt/app-root/src/kube-enricher ./ | ||
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| ENTRYPOINT ["./kube-enricher"] | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,48 @@ | ||
| package netflow | ||
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| import ( | ||
| "context" | ||
| "log" | ||
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| goflow2Format "github.com/netsampler/goflow2/format" | ||
| _ "github.com/netsampler/goflow2/format/protobuf" | ||
| "github.com/netsampler/goflow2/utils" | ||
| "github.com/sirupsen/logrus" | ||
| ) | ||
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| const channelSize = 5 | ||
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| type Driver struct { | ||
| in chan map[string]interface{} | ||
| } | ||
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| // Start a new go routine to handle netflow connections | ||
| func StartDriver(ctx context.Context, hostname string, port int) *Driver { | ||
| gf := Driver{} | ||
| gf.in = make(chan map[string]interface{}, channelSize) | ||
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| go func() { | ||
| transporter := NewWrapper(gf.in) | ||
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| formatter, err := goflow2Format.FindFormat(ctx, "pb") | ||
| if err != nil { | ||
| log.Fatal(err) | ||
| } | ||
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| sNF := &utils.StateNetFlow{ | ||
| Format: formatter, | ||
| Transport: transporter, | ||
| Logger: logrus.StandardLogger(), | ||
| } | ||
| err = sNF.FlowRoutine(1, hostname, port, false) | ||
| log.Fatal(err) | ||
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| }() | ||
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| return &gf | ||
| } | ||
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| func (gf *Driver) Next() (map[string]interface{}, error) { | ||
| msg := <-gf.in | ||
| return msg, nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,30 @@ | ||
| package netflow | ||
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| import ( | ||
| pbFormat "github.com/netobserv/goflow2-kube-enricher/pkg/format/pb" | ||
| goflowpb "github.com/netsampler/goflow2/pb" | ||
| "google.golang.org/protobuf/proto" | ||
| ) | ||
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| // This is en implementation of the goflow2 transport interface | ||
| type TransportWrapper struct { | ||
| c chan map[string]interface{} | ||
| } | ||
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| func NewWrapper(c chan map[string]interface{}) *TransportWrapper { | ||
| tw := TransportWrapper{c: c} | ||
| return &tw | ||
| } | ||
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| func (w *TransportWrapper) Send(key, data []byte) error { | ||
| message := goflowpb.FlowMessage{} | ||
| err := proto.Unmarshal(data, &message) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| renderedMsg, err := pbFormat.RenderMessage(&message) | ||
| if err == nil { | ||
| w.c <- renderedMsg | ||
| } | ||
| return err | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,44 @@ | ||
| package netflow | ||
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| import ( | ||
| "testing" | ||
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| "github.com/stretchr/testify/assert" | ||
| ) | ||
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| func TestWrapperSingleMessage(t *testing.T) { | ||
| assert := assert.New(t) | ||
| c := make(chan map[string]interface{}, 5) | ||
| wrapper := NewWrapper(c) | ||
| data := []byte{ | ||
| 0x08, 0x04, 0x10, 0xa6, 0x87, 0x91, 0x8b, 0x06, 0x20, 0x02, 0x32, 0x04, | ||
| 0x0a, 0xf4, 0x02, 0x03, 0x3a, 0x04, 0x0a, 0xf4, 0x02, 0x02, 0x48, 0xc0, | ||
| 0xa2, 0x01, 0x50, 0x90, 0x03, 0x5a, 0x04, 0x64, 0x40, 0x00, 0x03, 0x90, | ||
| 0x01, 0x07, 0xa0, 0x01, 0x06, 0xa8, 0x01, 0xf5, 0x3f, 0xb0, 0x01, 0xb6, | ||
| 0xda, 0x02, 0xd8, 0x01, 0x83, 0x84, 0xd0, 0xd7, 0x80, 0xcb, 0x02, 0xe0, | ||
| 0x01, 0x8a, 0xf2, 0xac, 0xec, 0xae, 0xd9, 0x30, 0xf0, 0x01, 0x80, 0x10, | ||
| 0x0a, 0x08, 0x04, 0x10, 0xe7, 0x87, 0x91, 0x8b, 0x06, 0x20, | ||
| } | ||
| err := wrapper.Send(nil, data) | ||
| assert.Nil(err) | ||
| message := <-c | ||
| assert.Contains(message, "SrcMac") | ||
| assert.Equal(message["SrcMac"], "0a:58:0a:f4:02:03") | ||
| assert.Contains(message, "SrcAddr") | ||
| assert.Equal(message["SrcAddr"], "10.244.2.3") | ||
| assert.Contains(message, "DstMac") | ||
| assert.Equal(message["DstMac"], "c2:ca:ed:8b:39:0a") | ||
| assert.Contains(message, "DstAddr") | ||
| assert.Equal(message["DstAddr"], "10.244.2.2") | ||
| } | ||
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| func TestWrapperError(t *testing.T) { | ||
| assert := assert.New(t) | ||
| c := make(chan map[string]interface{}, 5) | ||
| wrapper := NewWrapper(c) | ||
| data := []byte{ | ||
| 0xff, 0xab, 0xcd, 0xef, | ||
| } | ||
| err := wrapper.Send(nil, data) | ||
| assert.Error(err) | ||
| } |
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Just noting / realizing that if we stick to the redhat-supported tool chain we have to use this older version of go. Generics will wait :)