fix null value parsing

metrics will not be published anymore if they are ull

Signed-off-by: Markus Blaschke <mblaschke82@gmail.com>

go.mod

@@ -12,7 +12,7 @@ require (
 	github.com/prometheus/client_golang v1.11.0
 	github.com/remeh/sizedwaitgroup v1.0.0
 	github.com/sirupsen/logrus v1.8.1
-	github.com/webdevops/azure-resourcegraph-exporter v0.0.0-20210828132045-eb367b3180dc
+	github.com/webdevops/azure-resourcegraph-exporter v0.0.0-20210830185910-36bc29b34b66
 )
 
 require (

go.sum

@@ -233,8 +233,8 @@ github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXf
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/stretchr/testify v1.4.0 h1:2E4SXV/wtOkTonXsotYi4li6zVWxYlZuYNCXe9XRJyk=
 github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
-github.com/webdevops/azure-resourcegraph-exporter v0.0.0-20210828132045-eb367b3180dc h1:/CsGASswNlj8jGYuwkxRCTCaiX3QVGXvebvjxN5A6eI=
-github.com/webdevops/azure-resourcegraph-exporter v0.0.0-20210828132045-eb367b3180dc/go.mod h1:+O/vB3cTYLvYmBI1R0dO4VHbsrXAn3HopLiJBvJIUx8=
+github.com/webdevops/azure-resourcegraph-exporter v0.0.0-20210830185910-36bc29b34b66 h1:ehYAmLktbEIKVoJ7ZbONNUDO0boPmgriB5dNO18bG4w=
+github.com/webdevops/azure-resourcegraph-exporter v0.0.0-20210830185910-36bc29b34b66/go.mod h1:+O/vB3cTYLvYmBI1R0dO4VHbsrXAn3HopLiJBvJIUx8=
 github.com/yuin/goldmark v1.1.25/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 github.com/yuin/goldmark v1.1.27/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 github.com/yuin/goldmark v1.1.32/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=

loganalytics/prober.go

@@ -194,7 +194,9 @@ func (p *LogAnalyticsProber) Run() {
 				}
 			}
 
-			gaugeVec.With(metric.Labels).Set(metric.Value)
+			if metric.Value != nil {
+				gaugeVec.With(metric.Labels).Set(*metric.Value)
+			}
 		}
 	}
 	p.logger.WithField("duration", time.Since(requestTime).String()).Debug("finished request")