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azure-resource-graph-datasource.go
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azure-resource-graph-datasource.go
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package resourcegraph
import (
"bytes"
"context"
"encoding/json"
"fmt"
"io"
"net/http"
"net/url"
"path"
"time"
"github.com/grafana/grafana-azure-sdk-go/azsettings"
"github.com/grafana/grafana-plugin-sdk-go/backend"
"github.com/grafana/grafana-plugin-sdk-go/data"
"go.opentelemetry.io/otel/attribute"
"github.com/grafana/grafana/pkg/components/simplejson"
"github.com/grafana/grafana/pkg/infra/tracing"
"github.com/grafana/grafana/pkg/setting"
"github.com/grafana/grafana/pkg/tsdb/azuremonitor/azlog"
"github.com/grafana/grafana/pkg/tsdb/azuremonitor/loganalytics"
"github.com/grafana/grafana/pkg/tsdb/azuremonitor/macros"
"github.com/grafana/grafana/pkg/tsdb/azuremonitor/types"
)
// AzureResourceGraphResponse is the json response object from the Azure Resource Graph Analytics API.
type AzureResourceGraphResponse struct {
Data types.AzureResponseTable `json:"data"`
}
// AzureResourceGraphDatasource calls the Azure Resource Graph API's
type AzureResourceGraphDatasource struct {
Proxy types.ServiceProxy
}
// AzureResourceGraphQuery is the query request that is built from the saved values for
// from the UI
type AzureResourceGraphQuery struct {
RefID string
ResultFormat string
URL string
JSON json.RawMessage
InterpolatedQuery string
TimeRange backend.TimeRange
}
const ArgAPIVersion = "2021-06-01-preview"
const argQueryProviderName = "/providers/Microsoft.ResourceGraph/resources"
func (e *AzureResourceGraphDatasource) ResourceRequest(rw http.ResponseWriter, req *http.Request, cli *http.Client) {
e.Proxy.Do(rw, req, cli)
}
// executeTimeSeriesQuery does the following:
// 1. builds the AzureMonitor url and querystring for each query
// 2. executes each query by calling the Azure Monitor API
// 3. parses the responses for each query into data frames
func (e *AzureResourceGraphDatasource) ExecuteTimeSeriesQuery(ctx context.Context, originalQueries []backend.DataQuery, dsInfo types.DatasourceInfo, client *http.Client,
url string, tracer tracing.Tracer) (*backend.QueryDataResponse, error) {
result := &backend.QueryDataResponse{
Responses: map[string]backend.DataResponse{},
}
queries, err := e.buildQueries(originalQueries, dsInfo)
if err != nil {
return nil, err
}
for _, query := range queries {
result.Responses[query.RefID] = e.executeQuery(ctx, query, dsInfo, client, url, tracer)
}
return result, nil
}
type argJSONQuery struct {
AzureResourceGraph struct {
Query string `json:"query"`
ResultFormat string `json:"resultFormat"`
} `json:"azureResourceGraph"`
}
func (e *AzureResourceGraphDatasource) buildQueries(queries []backend.DataQuery, dsInfo types.DatasourceInfo) ([]*AzureResourceGraphQuery, error) {
var azureResourceGraphQueries []*AzureResourceGraphQuery
for _, query := range queries {
queryJSONModel := argJSONQuery{}
err := json.Unmarshal(query.JSON, &queryJSONModel)
if err != nil {
return nil, fmt.Errorf("failed to decode the Azure Resource Graph query object from JSON: %w", err)
}
azureResourceGraphTarget := queryJSONModel.AzureResourceGraph
azlog.Debug("AzureResourceGraph", "target", azureResourceGraphTarget)
resultFormat := azureResourceGraphTarget.ResultFormat
if resultFormat == "" {
resultFormat = "table"
}
interpolatedQuery, err := macros.KqlInterpolate(query, dsInfo, azureResourceGraphTarget.Query)
if err != nil {
return nil, err
}
azureResourceGraphQueries = append(azureResourceGraphQueries, &AzureResourceGraphQuery{
RefID: query.RefID,
ResultFormat: resultFormat,
JSON: query.JSON,
InterpolatedQuery: interpolatedQuery,
TimeRange: query.TimeRange,
})
}
return azureResourceGraphQueries, nil
}
func (e *AzureResourceGraphDatasource) executeQuery(ctx context.Context, query *AzureResourceGraphQuery, dsInfo types.DatasourceInfo, client *http.Client,
dsURL string, tracer tracing.Tracer) backend.DataResponse {
dataResponse := backend.DataResponse{}
params := url.Values{}
params.Add("api-version", ArgAPIVersion)
dataResponseErrorWithExecuted := func(err error) backend.DataResponse {
dataResponse = backend.DataResponse{Error: err}
frames := data.Frames{
&data.Frame{
RefID: query.RefID,
Meta: &data.FrameMeta{
ExecutedQueryString: query.InterpolatedQuery,
},
},
}
dataResponse.Frames = frames
return dataResponse
}
model, err := simplejson.NewJson(query.JSON)
if err != nil {
dataResponse.Error = err
return dataResponse
}
reqBody, err := json.Marshal(map[string]interface{}{
"subscriptions": model.Get("subscriptions").MustStringArray(),
"query": query.InterpolatedQuery,
"options": map[string]string{"resultFormat": "table"},
})
if err != nil {
dataResponse.Error = err
return dataResponse
}
req, err := e.createRequest(ctx, dsInfo, reqBody, dsURL)
if err != nil {
dataResponse.Error = err
return dataResponse
}
req.URL.Path = path.Join(req.URL.Path, argQueryProviderName)
req.URL.RawQuery = params.Encode()
ctx, span := tracer.Start(ctx, "azure resource graph query")
span.SetAttributes("interpolated_query", query.InterpolatedQuery, attribute.Key("interpolated_query").String(query.InterpolatedQuery))
span.SetAttributes("from", query.TimeRange.From.UnixNano()/int64(time.Millisecond), attribute.Key("from").Int64(query.TimeRange.From.UnixNano()/int64(time.Millisecond)))
span.SetAttributes("until", query.TimeRange.To.UnixNano()/int64(time.Millisecond), attribute.Key("until").Int64(query.TimeRange.To.UnixNano()/int64(time.Millisecond)))
span.SetAttributes("datasource_id", dsInfo.DatasourceID, attribute.Key("datasource_id").Int64(dsInfo.DatasourceID))
span.SetAttributes("org_id", dsInfo.OrgID, attribute.Key("org_id").Int64(dsInfo.OrgID))
defer span.End()
tracer.Inject(ctx, req.Header, span)
azlog.Debug("AzureResourceGraph", "Request ApiURL", req.URL.String())
res, err := client.Do(req)
if err != nil {
return dataResponseErrorWithExecuted(err)
}
argResponse, err := e.unmarshalResponse(res)
if err != nil {
return dataResponseErrorWithExecuted(err)
}
frame, err := loganalytics.ResponseTableToFrame(&argResponse.Data, query.RefID, query.InterpolatedQuery)
if err != nil {
return dataResponseErrorWithExecuted(err)
}
azurePortalUrl, err := GetAzurePortalUrl(dsInfo.Cloud)
if err != nil {
return dataResponseErrorWithExecuted(err)
}
url := azurePortalUrl + "/#blade/HubsExtension/ArgQueryBlade/query/" + url.PathEscape(query.InterpolatedQuery)
frameWithLink := AddConfigLinks(*frame, url)
if frameWithLink.Meta == nil {
frameWithLink.Meta = &data.FrameMeta{}
}
frameWithLink.Meta.ExecutedQueryString = req.URL.RawQuery
dataResponse.Frames = data.Frames{&frameWithLink}
return dataResponse
}
func AddConfigLinks(frame data.Frame, dl string) data.Frame {
for i := range frame.Fields {
if frame.Fields[i].Config == nil {
frame.Fields[i].Config = &data.FieldConfig{}
}
deepLink := data.DataLink{
Title: "View in Azure Portal",
TargetBlank: true,
URL: dl,
}
frame.Fields[i].Config.Links = append(frame.Fields[i].Config.Links, deepLink)
}
return frame
}
func (e *AzureResourceGraphDatasource) createRequest(ctx context.Context, dsInfo types.DatasourceInfo, reqBody []byte, url string) (*http.Request, error) {
req, err := http.NewRequestWithContext(ctx, http.MethodPost, url, bytes.NewBuffer(reqBody))
if err != nil {
azlog.Debug("Failed to create request", "error", err)
return nil, fmt.Errorf("%v: %w", "failed to create request", err)
}
req.URL.Path = "/"
req.Header.Set("Content-Type", "application/json")
req.Header.Set("User-Agent", fmt.Sprintf("Grafana/%s", setting.BuildVersion))
return req, nil
}
func (e *AzureResourceGraphDatasource) unmarshalResponse(res *http.Response) (AzureResourceGraphResponse, error) {
body, err := io.ReadAll(res.Body)
if err != nil {
return AzureResourceGraphResponse{}, err
}
defer func() {
if err := res.Body.Close(); err != nil {
azlog.Warn("Failed to close response body", "err", err)
}
}()
if res.StatusCode/100 != 2 {
azlog.Debug("Request failed", "status", res.Status, "body", string(body))
return AzureResourceGraphResponse{}, fmt.Errorf("%s. Azure Resource Graph error: %s", res.Status, string(body))
}
var data AzureResourceGraphResponse
d := json.NewDecoder(bytes.NewReader(body))
d.UseNumber()
err = d.Decode(&data)
if err != nil {
azlog.Debug("Failed to unmarshal azure resource graph response", "error", err, "status", res.Status, "body", string(body))
return AzureResourceGraphResponse{}, err
}
return data, nil
}
func GetAzurePortalUrl(azureCloud string) (string, error) {
switch azureCloud {
case azsettings.AzurePublic:
return "https://portal.azure.com", nil
case azsettings.AzureChina:
return "https://portal.azure.cn", nil
case azsettings.AzureUSGovernment:
return "https://portal.azure.us", nil
case azsettings.AzureGermany:
return "https://portal.microsoftazure.de", nil
default:
return "", fmt.Errorf("the cloud is not supported")
}
}