Remove all metrics ingestion into OpenObserve (gateway + bundled KSM)

Extend the agent-only change to a full "no metrics in OpenObserve" posture:
metrics and alerting live solely in kube-prometheus.

Gateway:
- Remove the `metrics` pipeline (otlp, servicegraph, prometheus -> OpenObserve)
- Remove the `prometheus` receiver (cadvisor/KSM scrapes into OpenObserve)
- Remove the `servicegraph` connector and unwire it from the traces pipeline
  (drops the OpenObserve service-map, which was the only metrics we kept)

Chart:
- Disable the bundled `kube-state-metrics` subchart; kube-prometheus already
  ships KSM, node-exporter, and kubelet/cAdvisor scraping for Prometheus

Gateway now runs logs/k8s_events + traces only; agent runs logs only.

Author: ashish1099

argocd-helm-charts/openobserve/charts/openobserve-collector/values.yaml

@@ -59,7 +59,7 @@ labels: {}
 # kube-state-metrics exposes Kubernetes object states as Prometheus metrics.
 # Set enabled: false if you already have kube-state-metrics installed in your cluster.
 kube-state-metrics:
-  enabled: true
+  enabled: false
   namespaceOverride: "kube-system"
   fullnameOverride: "kube-state-metrics"
   tolerations:
@@ -499,171 +499,6 @@ gateway:
       objects:
         - name: resourcequotas
           mode: watch
-    prometheus:
-      config:
-        scrape_configs:
-          - job_name: cadvisor
-            scheme: https
-            sample_limit: 10000
-            scrape_interval: 30s
-            scrape_timeout: 10s
-            metrics_path: /metrics/cadvisor
-            tls_config:
-              ca_file: /var/run/secrets/kubernetes.io/serviceaccount/ca.crt
-              insecure_skip_verify: true
-            authorization:
-              credentials_file: "/var/run/secrets/kubernetes.io/serviceaccount/token"
-              type: Bearer
-            kubernetes_sd_configs:
-              - role: node
-            metric_relabel_configs:
-              # Keep container filesystem read/write metrics for IOPS
-              - action: keep
-                regex: container_fs_(reads_total|writes_total|reads_bytes_total|writes_bytes_total)
-                source_labels:
-                  - __name__
-              # Drop cgroup metrics with no pod
-              - action: drop
-                regex: ".+;"
-                separator: ";"
-                source_labels:
-                  - id
-                  - pod
-            relabel_configs:
-              - action: replace
-                replacement: "kubelet"
-                target_label: job
-              - action: replace
-                source_labels:
-                  - __meta_kubernetes_node_name
-                target_label: node
-          - job_name: kube-state-metrics
-            scrape_interval: 30s
-            scrape_timeout: 10s
-            static_configs:
-              - targets: ["kube-state-metrics.kube-system.svc.cluster.local:8080"]
-            metric_relabel_configs:
-              # Keep the most useful kube-state-metrics for a Datadog-equivalent view
-              - action: keep
-                regex: "kube_(pod_info|pod_created|pod_status_phase|pod_status_ready|pod_status_reason|pod_container_info|pod_container_status_ready|pod_container_status_restarts_total|pod_container_resource_requests|pod_container_resource_limits|pod_container_status_waiting.*|pod_container_status_terminated_reason|pod_owner|pod_spec_volumes_persistentvolumeclaims_info|pod_container_security_context_privileged|pod_container_security_context_run_as_user|pod_container_security_context_run_as_non_root|deployment_status_replicas.*|deployment_spec_replicas|deployment_created|daemonset_created|daemonset_status.*|statefulset_replicas|statefulset_created|statefulset_status.*|replicaset_status.*|replicaset_spec_replicas|replicaset_created|replicaset_owner|replicaset_annotations|service_info|service_created|service_spec_type|service_status_load_balancer_ingress|endpoint_address|node_status_condition|node_status_allocatable|node_info|node_spec_taint|node_created|namespace_status_phase|namespace_created|persistentvolumeclaim_status_phase|persistentvolumeclaim_info|persistentvolumeclaim_access_mode|persistentvolumeclaim_resource_requests_storage_bytes|persistentvolumeclaim_created|persistentvolume_info|persistentvolume_created|persistentvolume_status_phase|persistentvolume_capacity_bytes|persistentvolume_access_mode|persistentvolume_reclaim_policy|horizontalpodautoscaler_info|horizontalpodautoscaler_created|horizontalpodautoscaler_status.*|horizontalpodautoscaler_spec.*|job_info|job_created|job_status.*|job_spec.*|job_complete|job_failed|job_owner|cronjob_info|cronjob_created|cronjob_status_active|cronjob_spec_suspend|cronjob_next_schedule_time|ingress_info|ingress_created|ingress_path|ingress_tls|ingress_labels|networkpolicy_created|networkpolicy_spec_ingress_rules|networkpolicy_spec_egress_rules|resourcequota|limitrange|serviceaccount_info|serviceaccount_created)"
-                source_labels: [__name__]
-          # CoreDNS metrics (DNS request rate, error rate, cache hit/miss)
-          - job_name: coredns
-            scrape_interval: 30s
-            scrape_timeout: 10s
-            kubernetes_sd_configs:
-              - role: endpoints
-                namespaces:
-                  names: [kube-system]
-            relabel_configs:
-              - source_labels: [__meta_kubernetes_service_name]
-                action: keep
-                regex: kube-dns
-              - source_labels: [__meta_kubernetes_endpoint_port_name]
-                action: keep
-                regex: metrics
-          # kube-apiserver metrics (request rate, latency, error rate, inflight requests)
-          - job_name: kube-apiserver
-            scheme: https
-            scrape_interval: 30s
-            scrape_timeout: 10s
-            tls_config:
-              ca_file: /var/run/secrets/kubernetes.io/serviceaccount/ca.crt
-            authorization:
-              credentials_file: "/var/run/secrets/kubernetes.io/serviceaccount/token"
-              type: Bearer
-            kubernetes_sd_configs:
-              - role: endpoints
-                namespaces:
-                  names: [default]
-            relabel_configs:
-              - source_labels: [__meta_kubernetes_service_name, __meta_kubernetes_endpoint_port_name]
-                action: keep
-                regex: kubernetes;https
-            metric_relabel_configs:
-              - action: keep
-                regex: "apiserver_(request_total|request_duration_seconds_bucket|request_duration_seconds_count|admission_webhook_request_total|current_inflight_requests|client_certificate_expiration_seconds.*)|process_resident_memory_bytes|process_cpu_seconds_total|kubernetes_build_info"
-                source_labels: [__name__]
-          # kube-scheduler metrics (scheduling latency, queue depth)
-          - job_name: kube-scheduler
-            scheme: https
-            scrape_interval: 30s
-            scrape_timeout: 10s
-            tls_config:
-              insecure_skip_verify: true
-            authorization:
-              credentials_file: "/var/run/secrets/kubernetes.io/serviceaccount/token"
-              type: Bearer
-            kubernetes_sd_configs:
-              - role: pod
-                namespaces:
-                  names: [kube-system]
-            relabel_configs:
-              - source_labels: [__meta_kubernetes_pod_label_component]
-                action: keep
-                regex: kube-scheduler
-              - source_labels: [__address__]
-                action: replace
-                regex: "([^:]+)(?::\\d+)?"
-                replacement: "$1:10259"
-                target_label: __address__
-              - source_labels: [__meta_kubernetes_pod_node_name]
-                target_label: node
-          # kube-controller-manager metrics (reconciliation errors, queue depth)
-          - job_name: kube-controller-manager
-            scheme: https
-            scrape_interval: 30s
-            scrape_timeout: 10s
-            tls_config:
-              insecure_skip_verify: true
-            authorization:
-              credentials_file: "/var/run/secrets/kubernetes.io/serviceaccount/token"
-              type: Bearer
-            kubernetes_sd_configs:
-              - role: pod
-                namespaces:
-                  names: [kube-system]
-            relabel_configs:
-              - source_labels: [__meta_kubernetes_pod_label_component]
-                action: keep
-                regex: kube-controller-manager
-              - source_labels: [__address__]
-                action: replace
-                regex: "([^:]+)(?::\\d+)?"
-                replacement: "$1:10257"
-                target_label: __address__
-              - source_labels: [__meta_kubernetes_pod_node_name]
-                target_label: node
-          # Prometheus auto-discovery: scrapes any pod annotated with prometheus.io/scrape=true
-          - job_name: prometheus-autodiscovery
-            scrape_interval: 30s
-            kubernetes_sd_configs:
-              - role: pod
-            relabel_configs:
-              - source_labels: [__meta_kubernetes_pod_annotation_prometheus_io_scrape]
-                action: keep
-                regex: "true"
-              - source_labels: [__meta_kubernetes_pod_annotation_prometheus_io_path]
-                action: replace
-                target_label: __metrics_path__
-                regex: (.+)
-              - source_labels: [__address__, __meta_kubernetes_pod_annotation_prometheus_io_port]
-                action: replace
-                regex: "([^:]+)(?::\\d+)?;(\\d+)"
-                replacement: "$1:$2"
-                target_label: __address__
-              - source_labels: [__meta_kubernetes_pod_annotation_prometheus_io_scheme]
-                action: replace
-                regex: (https?)
-                target_label: __scheme__
-              - source_labels: [__meta_kubernetes_namespace]
-                target_label: namespace
-              - source_labels: [__meta_kubernetes_pod_name]
-                target_label: pod
-              - source_labels: [__meta_kubernetes_pod_label_app_kubernetes_io_name]
-                target_label: service
-            sample_limit: 10000
-
   processors:
     # Strip large CRD spec/status before export.
     # The openAPIV3Schema inside spec.versions[*].schema is 100KB-2MB per CRD.
@@ -760,32 +595,7 @@ gateway:
     # memory_ballast:
     #   # Memory Ballast size should be max 1/3 to 1/2 of memory. It's a large buffer that is pre-allocated in the memory to help stabilize and reduce the garbage collection (GC) pressure on the Go runtime.
     #   size_mib: 512
-  connectors:
-    servicegraph:
-      latency_histogram_buckets:
-        [
-          2ms,
-          4ms,
-          6ms,
-          8ms,
-          10ms,
-          50ms,
-          100ms,
-          200ms,
-          400ms,
-          800ms,
-          1s,
-          1400ms,
-          2s,
-          5s,
-          10s,
-          15s,
-        ]
-      dimensions:
-        - http.method
-      store:
-        ttl: 30s
-        max_items: 10000
+  connectors: {}
   service:
     extensions: [health_check, zpages]
     pipelines:
@@ -794,13 +604,8 @@ gateway:
         processors:
           [memory_limiter, resourcedetection, attributes, k8sattributes, transform/strip_crd_spec, batch]
         exporters: [otlphttp/openobserve_k8s_events]
-      metrics:
-        receivers: [otlp, servicegraph, prometheus]
-        processors:
-          [memory_limiter, resourcedetection, attributes, k8sattributes, batch]
-        exporters: [otlphttp/openobserve]
       traces:
         receivers: [otlp]
         processors:
           [memory_limiter, resourcedetection, attributes, k8sattributes, batch]
-        exporters: [otlphttp/openobserve, servicegraph] 
+        exporters: [otlphttp/openobserve]