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Merge pull request #2678 from Shoothzj/extract-metrics-client
Extract MetricsClient and NodeMetrics to support other metrics platform
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,39 @@ | ||
| /* | ||
| Copyright 2023 The Volcano Authors. | ||
| Licensed under the Apache License, Version 2.0 (the "License"); | ||
| you may not use this file except in compliance with the License. | ||
| You may obtain a copy of the License at | ||
| http://www.apache.org/licenses/LICENSE-2.0 | ||
| Unless required by applicable law or agreed to in writing, software | ||
| distributed under the License is distributed on an "AS IS" BASIS, | ||
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| See the License for the specific language governing permissions and | ||
| limitations under the License. | ||
| */ | ||
|
|
||
| package source | ||
|
|
||
| import ( | ||
| "context" | ||
| "errors" | ||
| ) | ||
|
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| type NodeMetrics struct { | ||
| Cpu float64 | ||
| Memory float64 | ||
| } | ||
|
|
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| type MetricsClient interface { | ||
| NodeMetricsAvg(ctx context.Context, nodeName string, period string) (*NodeMetrics, error) | ||
| } | ||
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| func NewMetricsClient(metricsConf map[string]string) (MetricsClient, error) { | ||
| address := metricsConf["address"] | ||
| if len(address) == 0 { | ||
| return nil, errors.New("metrics address is empty") | ||
| } | ||
| return &PrometheusMetricsClient{address: address}, nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,88 @@ | ||
| /* | ||
| Copyright 2023 The Volcano Authors. | ||
| Licensed under the Apache License, Version 2.0 (the "License"); | ||
| you may not use this file except in compliance with the License. | ||
| You may obtain a copy of the License at | ||
| http://www.apache.org/licenses/LICENSE-2.0 | ||
| Unless required by applicable law or agreed to in writing, software | ||
| distributed under the License is distributed on an "AS IS" BASIS, | ||
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| See the License for the specific language governing permissions and | ||
| limitations under the License. | ||
| */ | ||
|
|
||
| package source | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
| "github.com/prometheus/client_golang/api" | ||
| prometheusv1 "github.com/prometheus/client_golang/api/prometheus/v1" | ||
| pmodel "github.com/prometheus/common/model" | ||
| "k8s.io/klog/v2" | ||
| "strconv" | ||
| "strings" | ||
| "time" | ||
| ) | ||
|
|
||
| const ( | ||
| // promCpuUsageAvg record name of cpu average usage defined in prometheus rules | ||
| promCpuUsageAvg = "cpu_usage_avg" | ||
| // promMemUsageAvg record name of mem average usage defined in prometheus rules | ||
| promMemUsageAvg = "mem_usage_avg" | ||
| ) | ||
|
|
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| type PrometheusMetricsClient struct { | ||
| address string | ||
| } | ||
|
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| func NewPrometheusMetricsClient(address string) (*PrometheusMetricsClient, error) { | ||
| return &PrometheusMetricsClient{address: address}, nil | ||
| } | ||
|
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| func (p *PrometheusMetricsClient) NodeMetricsAvg(ctx context.Context, nodeName string, period string) (*NodeMetrics, error) { | ||
| klog.V(4).Infof("Get node metrics from Prometheus: %s", p.address) | ||
| client, err := api.NewClient(api.Config{ | ||
| Address: p.address, | ||
| }) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| v1api := prometheusv1.NewAPI(client) | ||
| nodeMetrics := &NodeMetrics{} | ||
| for _, metric := range []string{promCpuUsageAvg, promMemUsageAvg} { | ||
| queryStr := fmt.Sprintf("%s_%s{instance=\"%s\"}", metric, period, nodeName) | ||
| klog.V(4).Infof("Query prometheus by %s", queryStr) | ||
| res, warnings, err := v1api.Query(ctx, queryStr, time.Now()) | ||
| if err != nil { | ||
| klog.Errorf("Error querying Prometheus: %v", err) | ||
| } | ||
| if len(warnings) > 0 { | ||
| klog.V(3).Infof("Warning querying Prometheus: %v", warnings) | ||
| } | ||
| if res == nil || res.String() == "" { | ||
| klog.Warningf("Warning querying Prometheus: no data found for %s", queryStr) | ||
| continue | ||
| } | ||
| // plugin.usage only need type pmodel.ValVector in Prometheus.rulues | ||
| if res.Type() != pmodel.ValVector { | ||
| continue | ||
| } | ||
| // only method res.String() can get data, dataType []pmodel.ValVector, eg: "{k1:v1, ...} => #[value] @#[timespace]\n {k2:v2, ...} => ..." | ||
| firstRowValVector := strings.Split(res.String(), "\n")[0] | ||
| rowValues := strings.Split(strings.TrimSpace(firstRowValVector), "=>") | ||
| value := strings.Split(strings.TrimSpace(rowValues[1]), " ") | ||
| switch metric { | ||
| case promCpuUsageAvg: | ||
| cpuUsage, _ := strconv.ParseFloat(value[0], 64) | ||
| nodeMetrics.Cpu = cpuUsage | ||
| case promMemUsageAvg: | ||
| memUsage, _ := strconv.ParseFloat(value[0], 64) | ||
| nodeMetrics.Memory = memUsage | ||
| } | ||
| } | ||
| return nodeMetrics, nil | ||
| } |