Move cloud metadata packages and kubernetes resources marshaling to internal

Decouples cloud provider metadata packages from kubernetes related code

Signed-off-by: Malte Poll <mp@edgeless.systems>

internal/cloud/azure/logger.go

@@ -0,0 +1,65 @@
+package azure
+
+import (
+	"context"
+	"errors"
+
+	"github.com/Azure/azure-sdk-for-go/sdk/resourcemanager/applicationinsights/armapplicationinsights"
+	"github.com/edgelesssys/constellation/internal/azureshared"
+	"github.com/microsoft/ApplicationInsights-Go/appinsights"
+)
+
+type Logger struct {
+	client appinsights.TelemetryClient
+}
+
+// NewLogger creates a new client to store information in Azure Application Insights
+// https://github.com/Microsoft/ApplicationInsights-go
+func NewLogger(ctx context.Context, metadata *Metadata) (*Logger, error) {
+	providerID, err := metadata.providerID(ctx)
+	if err != nil {
+		return nil, err
+	}
+
+	_, resourceGroup, err := azureshared.BasicsFromProviderID(providerID)
+	if err != nil {
+		return nil, err
+	}
+
+	uid, err := azureshared.UIDFromProviderID(providerID)
+	if err != nil {
+		return nil, err
+	}
+
+	resourceName := "constellation-insights-" + uid
+	resp, err := metadata.applicationInsightsAPI.Get(ctx, resourceGroup, resourceName, &armapplicationinsights.ComponentsClientGetOptions{})
+	if err != nil {
+		return nil, err
+	}
+	if resp.Properties == nil || resp.Properties.InstrumentationKey == nil {
+		return nil, errors.New("unable to get instrumentation key")
+	}
+	client := appinsights.NewTelemetryClient(*resp.Properties.InstrumentationKey)
+
+	instance, err := metadata.GetInstance(ctx, providerID)
+	if err != nil {
+		return nil, err
+	}
+	client.Context().CommonProperties["instance-name"] = instance.Name
+
+	return &Logger{
+		client: client,
+	}, nil
+}
+
+// Disclose stores log information in Azure Application Insights!
+// Do **NOT** log sensitive information!
+func (l *Logger) Disclose(msg string) {
+	l.client.Track(appinsights.NewTraceTelemetry(msg, appinsights.Information))
+}
+
+// Close blocks until all information are written to cloud API.
+func (l *Logger) Close() error {
+	<-l.client.Channel().Close()
+	return nil
+}