Promethus operator fails to start Promethus pods after upgrading from pelorus-operator.v0.0.8 to pelorus-operator.v0.0.9

[achdmbp]

OpenShift version

4.13

Problem description

After upgrading from pelorus-operator.v0.0.8 to pelorus-operator.v0.0.9, Promethus operator pod shows below error and fails to start Promethus pods:

level=info ts=2024-07-01T15:26:40.289390758Z caller=operator.go:1163 component=prometheusoperator msg="sync prometheus" key=pelorus-operator/prometheus-pelorus
level=error ts=2024-07-01T15:26:40.322958155Z caller=klog.go:116 component=k8s_client_runtime func=ErrorDepth msg="Sync \"pelorus-operator/prometheus-pelorus\" failed: creating config failed: generating config failed: unmarshalling additional scrape configs failed: yaml: line 7: did not find expected '-' indicator"

Steps to reproduce

• install Pelorus operator pelorus-operator.v0.0.9
• create a new instance of Pelorus with following yaml:

kind: Pelorus
apiVersion: charts.pelorus.dora-metrics.io/v1alpha1
metadata:
  name: pelorus-devspaces
spec:
  federate_openshift_monitoring:
    enabled: true
    metrics_filter:
      # pull devspaces metrics we're interested in
      - "{namespace=~'.*-devspaces',pod=~'workspace.+'}"
  exporters:
    instances: []
  prometheus_storage: true
  prometheus_storage_pvc_capacity: 3Gi
  prometheus_storage_pvc_storageclass: gp2
  prometheus_retention_size: 2GB

Current behavior

Promethus operator pod shows below error and fails to start Promethus pods:

level=info ts=2024-07-01T15:26:40.289390758Z caller=operator.go:1163 component=prometheusoperator msg="sync prometheus" key=pelorus-operator/prometheus-pelorus
level=error ts=2024-07-01T15:26:40.322958155Z caller=klog.go:116 component=k8s_client_runtime func=ErrorDepth msg="Sync \"pelorus-operator/prometheus-pelorus\" failed: creating config failed: generating config failed: unmarshalling additional scrape configs failed: yaml: line 7: did not find expected '-' indicator"

Expected behavior

Promethus server starts up without errors

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