helm upgrade --version=“25.11.0” --install --namespace=“monitoring” --values values.yaml prometheus-thanos-sidecar promethehe
us-community/prometheus

sidecarContainers:
    thanos-sidecar:
      image: quay.io/thanos/thanos:v0.31.0  
      resources:
        requests:
          memory: "512Mi"
      env:
        - name: GOOGLE_APPLICATION_CREDENTIALS
          value: /etc/secret/sa
      args:
        - "sidecar"
        - --log.level=debug
        - --tsdb.path=/data
        - --prometheus.url=http://prometheus-thanos-sidecar-server
        - --objstore.config-file=/etc/thanos/bucket_config.yml
        - --reloader.config-envsubst-file=/etc/prometheus-config/prometheus.yml
        - --reloader.config-file=/etc/prometheus-config/prometheus.yml
        - --reloader.rule-dir=/etc/prometheus-config/rules
      ports:
        - name: sidecar-http
          containerPort: 10902
        - name: grpc
          containerPort: 10901
        - name: cluster
          containerPort: 10900