diff --git a/Dockerfile b/Dockerfile new file mode 100644 index 0000000..98af550 --- /dev/null +++ b/Dockerfile @@ -0,0 +1,13 @@ +FROM golang:1.14 as builder + +COPY . /opt +WORKDIR /opt + +RUN CGO_ENABLED=0 go build -o /opt/bin/app github.com/certusone/near_exporter/cmd/near_exporter + +FROM scratch + +COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/ca-certificates.crt +COPY --from=builder /opt/bin/app / + +CMD ["/app"] diff --git a/README.md b/README.md index 35f8ce8..ce365bb 100644 --- a/README.md +++ b/README.md @@ -1 +1,3 @@ -# near_exporter \ No newline at end of file +# near_exporter + +Docker images are available on [Docker Hub](https://hub.docker.com/r/certusone/near_exporter). diff --git a/cmd/near_exporter/exporter.go b/cmd/near_exporter/exporter.go new file mode 100644 index 0000000..daae47f --- /dev/null +++ b/cmd/near_exporter/exporter.go @@ -0,0 +1,213 @@ +package main + +import ( + "bytes" + "encoding/json" + "fmt" + "github.com/prometheus/client_golang/prometheus" + "github.com/prometheus/client_golang/prometheus/promhttp" + "io/ioutil" + "log" + "net/http" + "os" + "strconv" + "time" +) + +type ValidatorsResponse struct { + ID int `json:"id"` + Jsonrpc string `json:"jsonrpc"` + Result Result `json:"result"` + Error Error `json:"error"` +} + +type Error struct { + Code int `json:"code"` + Data string `json:"data"` + Message string `json:"message"` +} + +type CurrentProposals struct { + AccountID string `json:"account_id"` + PublicKey string `json:"public_key"` + Stake string `json:"stake"` +} + +type CurrentValidator struct { + AccountID string `json:"account_id"` + IsSlashed bool `json:"is_slashed"` + NumExpectedBlocks int `json:"num_expected_blocks"` + NumProducedBlocks int `json:"num_produced_blocks"` + PublicKey string `json:"public_key"` + Shards []int `json:"shards"` + Stake string `json:"stake"` +} + +type NextValidator struct { + AccountID string `json:"account_id"` + PublicKey string `json:"public_key"` + Shards []int `json:"shards"` + Stake string `json:"stake"` +} + +type Result struct { + CurrentFishermen []interface{} `json:"current_fishermen"` + CurrentProposals []CurrentProposals `json:"current_proposals"` + CurrentValidators []CurrentValidator `json:"current_validators"` + EpochStartHeight int `json:"epoch_start_height"` + NextFishermen []interface{} `json:"next_fishermen"` + NextValidators []NextValidator `json:"next_validators"` + PrevEpochKickout []interface{} `json:"prev_epoch_kickout"` +} + +const ( + httpTimeout = 2 * time.Second +) + +var ( + listenAddr = os.Getenv("LISTEN_ADDR") + nearRPCAddr = os.Getenv("NEAR_RPC_ADDR") +) + +func init() { + if nearRPCAddr == "" { + log.Fatal("Please specify NEAR_RPC_ADDR") + } + + if listenAddr == "" { + listenAddr = ":8080" + } +} + +type nearExporter struct { + client *http.Client + rpcAddr string + + totalValidatorsDesc *prometheus.Desc + epochStartHeight *prometheus.Desc + validatorStake *prometheus.Desc + validatorExpectedBlocks *prometheus.Desc + validatorProducedBlocks *prometheus.Desc + validatorIsSlashed *prometheus.Desc +} + +func NewSolanaCollector(rpcAddr string) prometheus.Collector { + return &nearExporter{ + client: &http.Client{Timeout: httpTimeout}, + rpcAddr: rpcAddr, + totalValidatorsDesc: prometheus.NewDesc( + "near_active_validators", + "Total number of active validators", + nil, nil), + epochStartHeight: prometheus.NewDesc( + "near_epoch_start_height", + "Current epoch's start height", + nil, nil), + validatorStake: prometheus.NewDesc( + "near_validator_stake", + "Validator's stake", + []string{"account_id"}, nil), + validatorExpectedBlocks: prometheus.NewDesc( + "near_validator_expected_blocks", + "Validators's expected blocks", + []string{"account_id"}, nil), + validatorProducedBlocks: prometheus.NewDesc( + "near_validator_produced_blocks", + "Validator's actual produced blocks", + []string{"account_id"}, nil), + validatorIsSlashed: prometheus.NewDesc( + "near_validator_is_slashed", + "Whether the validator is slashed", + []string{"account_id"}, nil), + } +} + +func (collector nearExporter) Describe(ch chan<- *prometheus.Desc) { + ch <- collector.totalValidatorsDesc +} + +func (collector nearExporter) mustEmitMetrics(ch chan<- prometheus.Metric, response *ValidatorsResponse) { + ch <- prometheus.MustNewConstMetric(collector.totalValidatorsDesc, prometheus.GaugeValue, + float64(len(response.Result.CurrentValidators))) + ch <- prometheus.MustNewConstMetric(collector.epochStartHeight, prometheus.GaugeValue, + float64(response.Result.EpochStartHeight)) + + for _, validator := range response.Result.CurrentValidators { + stake, err := strconv.ParseFloat(validator.Stake, 64) + if err != nil { + ch <- prometheus.NewInvalidMetric(collector.validatorStake, fmt.Errorf("invalid stake: %s", validator.Stake)) + } else { + ch <- prometheus.MustNewConstMetric(collector.validatorStake, prometheus.GaugeValue, + stake, validator.AccountID) + } + + ch <- prometheus.MustNewConstMetric(collector.validatorExpectedBlocks, prometheus.GaugeValue, + float64(validator.NumExpectedBlocks), validator.AccountID) + ch <- prometheus.MustNewConstMetric(collector.validatorProducedBlocks, prometheus.GaugeValue, + float64(validator.NumProducedBlocks), validator.AccountID) + + if validator.IsSlashed { + ch <- prometheus.MustNewConstMetric(collector.validatorIsSlashed, prometheus.GaugeValue, 1, validator.AccountID) + } else { + ch <- prometheus.MustNewConstMetric(collector.validatorIsSlashed, prometheus.GaugeValue, 0, validator.AccountID) + } + } +} + +func (collector nearExporter) Collect(ch chan<- prometheus.Metric) { + var ( + validatorResponse ValidatorsResponse + body []byte + err error + ) + + req, err := http.NewRequest("POST", collector.rpcAddr, + bytes.NewBufferString(`{"jsonrpc":"2.0","id":1, "method":"validators", "params":[null]}`)) + if err != nil { + panic(err) + } + req.Header.Set("content-type", "application/json") + + resp, err := collector.client.Do(req) + if err != nil { + goto error + } + defer resp.Body.Close() + + body, err = ioutil.ReadAll(resp.Body) + if err != nil { + goto error + } + + if resp.StatusCode != 200 { + err = fmt.Errorf("status code %d, response: %s", resp.StatusCode, body) + goto error + } + + if err = json.Unmarshal(body, &validatorResponse); err != nil { + goto error + } + + if validatorResponse.Error.Code != 0 { + err = fmt.Errorf("JSONRPC error: %s", body) + goto error + } + + collector.mustEmitMetrics(ch, &validatorResponse) + return + +error: + ch <- prometheus.NewInvalidMetric(collector.totalValidatorsDesc, err) + ch <- prometheus.NewInvalidMetric(collector.epochStartHeight, err) + ch <- prometheus.NewInvalidMetric(collector.validatorStake, err) + ch <- prometheus.NewInvalidMetric(collector.validatorExpectedBlocks, err) + ch <- prometheus.NewInvalidMetric(collector.validatorProducedBlocks, err) + ch <- prometheus.NewInvalidMetric(collector.validatorIsSlashed, err) +} + +func main() { + collector := NewSolanaCollector(nearRPCAddr) + prometheus.MustRegister(collector) + http.Handle("/metrics", promhttp.Handler()) + panic(http.ListenAndServe(listenAddr, nil)) +} diff --git a/go.mod b/go.mod new file mode 100644 index 0000000..86813a5 --- /dev/null +++ b/go.mod @@ -0,0 +1,5 @@ +module github.com/certusone/near_exporter + +go 1.14 + +require github.com/prometheus/client_golang v1.7.1 diff --git a/go.sum b/go.sum new file mode 100644 index 0000000..1754cb7 --- /dev/null +++ b/go.sum @@ -0,0 +1,102 @@ +github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc= +github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc= +github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0= +github.com/alecthomas/units v0.0.0-20190717042225-c3de453c63f4/go.mod 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