observability: migrate VictoriaMetrics to operator CRDs + Consul SD (#234)

## Why The k8s au-syd1 VictoriaMetrics stack ran as two helm charts and only scraped in-cluster targets. The victoria-metrics-operator already runs in vm-system, so this moves the stack onto operator-managed CRDs. That unlocks VMServiceScrape/VMPodScrape (auto-converted from Prometheus ServiceMonitors, used by a follow-up PR) and adds Consul service discovery so the cluster scrapes the **same puppet-prod targets** as the puppet vmagent. Also shrinks vmstorage 3 → 2 (Ceph-backed, replicationFactor 2). ## Changes - Add **VMCluster `main`**: vmstorage 2 replicas (cephrbd-fast-delete 200Gi, 180d retention, replicationFactor 2), vminsert/vmselect 2 replicas + HPA (2–10, 60% cpu). - Add **VMAgent `main`**: retains the kubernetes SD jobs (apiservers/nodes/cadvisor), `selectAllByDefault` for VMServiceScrape/VMPodScrape, and a **Consul SD job** against `consul.service.consul` (resolves to the puppet Consul from pods) replicating the puppet vmagent relabels — keep tag `metrics`, `__scheme__` from `metrics_scheme`, `job` from `metrics_job`. TLS is **verified against the reflected `vault-ca-cert`** (no insecure skip-verify). - Expose vmselect/vminsert/vmagent via **Gateway API** (traefik-internal Gateway + HTTPRoute, http→https redirect), same hostnames. - Remove the two helm charts, their values files, and vendored charts. ## Notes - Data wipe on cutover is acceptable (confirmed) — old helm PVCs can be deleted. - Verify at rollout: pods resolve `*.main.unkin.net` node FQDNs (needed for CA SAN match on scrape targets); `/targets` shows `job=consul`. Reviewed-on: #234 Co-authored-by: Ben Vincent <ben@unkin.net> Co-committed-by: Ben Vincent <ben@unkin.net>
2026-07-05 22:17:32 +10:00
parent 53b55419a7
commit 5f8f2b1c70
8 changed files with 523 additions and 301 deletions
@@ -0,0 +1,117 @@
+---
+apiVersion: gateway.networking.k8s.io/v1
+kind: Gateway
+metadata:
+  name: vmselect
+  namespace: observability
+  labels:
+    app.kubernetes.io/name: vmselect
+    app.kubernetes.io/instance: victoria-metrics
+    traefik.io/instance: internal
+  annotations:
+    cert-manager.io/cluster-issuer: vault-issuer
+    cert-manager.io/common-name: vmselect.k8s.syd1.au.unkin.net
+    cert-manager.io/private-key-size: "4096"
+    external-dns.alpha.kubernetes.io/hostname: vmselect.k8s.syd1.au.unkin.net
+    external-dns.alpha.kubernetes.io/target: 198.18.200.4
+spec:
+  gatewayClassName: traefik-internal
+  listeners:
+    - name: http
+      port: 80
+      protocol: HTTP
+      hostname: vmselect.k8s.syd1.au.unkin.net
+      allowedRoutes:
+        namespaces:
+          from: Same
+    - name: https
+      port: 443
+      protocol: HTTPS
+      hostname: vmselect.k8s.syd1.au.unkin.net
+      allowedRoutes:
+        namespaces:
+          from: Same
+      tls:
+        mode: Terminate
+        certificateRefs:
+          - group: ""
+            kind: Secret
+            name: vmselect-tls
+---
+apiVersion: gateway.networking.k8s.io/v1
+kind: Gateway
+metadata:
+  name: vminsert
+  namespace: observability
+  labels:
+    app.kubernetes.io/name: vminsert
+    app.kubernetes.io/instance: victoria-metrics
+    traefik.io/instance: internal
+  annotations:
+    cert-manager.io/cluster-issuer: vault-issuer
+    cert-manager.io/common-name: vminsert.k8s.syd1.au.unkin.net
+    cert-manager.io/private-key-size: "4096"
+    external-dns.alpha.kubernetes.io/hostname: vminsert.k8s.syd1.au.unkin.net
+    external-dns.alpha.kubernetes.io/target: 198.18.200.4
+spec:
+  gatewayClassName: traefik-internal
+  listeners:
+    - name: http
+      port: 80
+      protocol: HTTP
+      hostname: vminsert.k8s.syd1.au.unkin.net
+      allowedRoutes:
+        namespaces:
+          from: Same
+    - name: https
+      port: 443
+      protocol: HTTPS
+      hostname: vminsert.k8s.syd1.au.unkin.net
+      allowedRoutes:
+        namespaces:
+          from: Same
+      tls:
+        mode: Terminate
+        certificateRefs:
+          - group: ""
+            kind: Secret
+            name: vminsert-tls
+---
+apiVersion: gateway.networking.k8s.io/v1
+kind: Gateway
+metadata:
+  name: vmagent
+  namespace: observability
+  labels:
+    app.kubernetes.io/name: vmagent
+    app.kubernetes.io/instance: victoria-metrics
+    traefik.io/instance: internal
+  annotations:
+    cert-manager.io/cluster-issuer: vault-issuer
+    cert-manager.io/common-name: vmagent.k8s.syd1.au.unkin.net
+    cert-manager.io/private-key-size: "4096"
+    external-dns.alpha.kubernetes.io/hostname: vmagent.k8s.syd1.au.unkin.net
+    external-dns.alpha.kubernetes.io/target: 198.18.200.4
+spec:
+  gatewayClassName: traefik-internal
+  listeners:
+    - name: http
+      port: 80
+      protocol: HTTP
+      hostname: vmagent.k8s.syd1.au.unkin.net
+      allowedRoutes:
+        namespaces:
+          from: Same
+    - name: https
+      port: 443
+      protocol: HTTPS
+      hostname: vmagent.k8s.syd1.au.unkin.net
+      allowedRoutes:
+        namespaces:
+          from: Same
+      tls:
+        mode: Terminate
+        certificateRefs:
+          - group: ""
+            kind: Secret
+            name: vmagent-tls
@@ -0,0 +1,165 @@
+---
+apiVersion: gateway.networking.k8s.io/v1
+kind: HTTPRoute
+metadata:
+  name: vmselect-http-redirect
+  namespace: observability
+  labels:
+    app.kubernetes.io/name: vmselect
+    app.kubernetes.io/instance: victoria-metrics
+spec:
+  hostnames:
+    - vmselect.k8s.syd1.au.unkin.net
+  parentRefs:
+    - group: gateway.networking.k8s.io
+      kind: Gateway
+      name: vmselect
+      sectionName: http
+  rules:
+    - filters:
+        - type: RequestRedirect
+          requestRedirect:
+            scheme: https
+            statusCode: 301
+      matches:
+        - path:
+            type: PathPrefix
+            value: /
+---
+apiVersion: gateway.networking.k8s.io/v1
+kind: HTTPRoute
+metadata:
+  name: vmselect
+  namespace: observability
+  labels:
+    app.kubernetes.io/name: vmselect
+    app.kubernetes.io/instance: victoria-metrics
+spec:
+  hostnames:
+    - vmselect.k8s.syd1.au.unkin.net
+  parentRefs:
+    - group: gateway.networking.k8s.io
+      kind: Gateway
+      name: vmselect
+      sectionName: https
+  rules:
+    - backendRefs:
+        - group: ""
+          kind: Service
+          name: vmselect-main
+          port: 8481
+          weight: 1
+      matches:
+        - path:
+            type: PathPrefix
+            value: /
+---
+apiVersion: gateway.networking.k8s.io/v1
+kind: HTTPRoute
+metadata:
+  name: vminsert-http-redirect
+  namespace: observability
+  labels:
+    app.kubernetes.io/name: vminsert
+    app.kubernetes.io/instance: victoria-metrics
+spec:
+  hostnames:
+    - vminsert.k8s.syd1.au.unkin.net
+  parentRefs:
+    - group: gateway.networking.k8s.io
+      kind: Gateway
+      name: vminsert
+      sectionName: http
+  rules:
+    - filters:
+        - type: RequestRedirect
+          requestRedirect:
+            scheme: https
+            statusCode: 301
+      matches:
+        - path:
+            type: PathPrefix
+            value: /
+---
+apiVersion: gateway.networking.k8s.io/v1
+kind: HTTPRoute
+metadata:
+  name: vminsert
+  namespace: observability
+  labels:
+    app.kubernetes.io/name: vminsert
+    app.kubernetes.io/instance: victoria-metrics
+spec:
+  hostnames:
+    - vminsert.k8s.syd1.au.unkin.net
+  parentRefs:
+    - group: gateway.networking.k8s.io
+      kind: Gateway
+      name: vminsert
+      sectionName: https
+  rules:
+    - backendRefs:
+        - group: ""
+          kind: Service
+          name: vminsert-main
+          port: 8480
+          weight: 1
+      matches:
+        - path:
+            type: PathPrefix
+            value: /
+---
+apiVersion: gateway.networking.k8s.io/v1
+kind: HTTPRoute
+metadata:
+  name: vmagent-http-redirect
+  namespace: observability
+  labels:
+    app.kubernetes.io/name: vmagent
+    app.kubernetes.io/instance: victoria-metrics
+spec:
+  hostnames:
+    - vmagent.k8s.syd1.au.unkin.net
+  parentRefs:
+    - group: gateway.networking.k8s.io
+      kind: Gateway
+      name: vmagent
+      sectionName: http
+  rules:
+    - filters:
+        - type: RequestRedirect
+          requestRedirect:
+            scheme: https
+            statusCode: 301
+      matches:
+        - path:
+            type: PathPrefix
+            value: /
+---
+apiVersion: gateway.networking.k8s.io/v1
+kind: HTTPRoute
+metadata:
+  name: vmagent
+  namespace: observability
+  labels:
+    app.kubernetes.io/name: vmagent
+    app.kubernetes.io/instance: victoria-metrics
+spec:
+  hostnames:
+    - vmagent.k8s.syd1.au.unkin.net
+  parentRefs:
+    - group: gateway.networking.k8s.io
+      kind: Gateway
+      name: vmagent
+      sectionName: https
+  rules:
+    - backendRefs:
+        - group: ""
+          kind: Service
+          name: vmagent-main
+          port: 8429
+          weight: 1
+      matches:
+        - path:
+            type: PathPrefix
+            value: /
@@ -4,3 +4,7 @@ kind: Kustomization

 resources:
  - namespace.yaml
+  - vmcluster.yaml
+  - vmagent.yaml
+  - gateway.yaml
+  - httproute.yaml
@@ -0,0 +1,122 @@
+---
+apiVersion: operator.victoriametrics.com/v1beta1
+kind: VMAgent
+metadata:
+  name: main
+  namespace: observability
+spec:
+  replicaCount: 2
+  scrapeInterval: 15s
+  # Also consume VMServiceScrape / VMPodScrape / VMNodeScrape from every namespace
+  # (the operator auto-converts Prometheus ServiceMonitors -> VMServiceScrape).
+  selectAllByDefault: true
+  extraArgs:
+    loggerFormat: json
+  remoteWrite:
+    - url: http://vminsert-main.observability.svc.cluster.local:8480/insert/0/prometheus/
+  resources:
+    requests:
+      cpu: 500m
+      memory: 512Mi
+    limits:
+      cpu: "1"
+      memory: 2Gi
+  # Reflected Vault intermediate CA (unkin.net) for verifying puppet Consul + metrics targets.
+  volumes:
+    - name: vault-ca
+      secret:
+        secretName: vault-ca-cert
+  volumeMounts:
+    - name: vault-ca
+      mountPath: /etc/vmagent-tls
+      readOnly: true
+  inlineScrapeConfig: |
+    - job_name: vmagent
+      static_configs:
+        - targets: ["localhost:8429"]
+    - job_name: "kubernetes-apiservers"
+      kubernetes_sd_configs:
+        - role: endpoints
+      scheme: https
+      tls_config:
+        ca_file: /var/run/secrets/kubernetes.io/serviceaccount/ca.crt
+        insecure_skip_verify: true
+      bearer_token_file: /var/run/secrets/kubernetes.io/serviceaccount/token
+      relabel_configs:
+        - source_labels:
+            - __meta_kubernetes_namespace
+            - __meta_kubernetes_service_name
+            - __meta_kubernetes_endpoint_port_name
+          action: keep
+          regex: default;kubernetes;https
+    - job_name: "kubernetes-nodes"
+      scheme: https
+      tls_config:
+        ca_file: /var/run/secrets/kubernetes.io/serviceaccount/ca.crt
+        insecure_skip_verify: true
+      bearer_token_file: /var/run/secrets/kubernetes.io/serviceaccount/token
+      kubernetes_sd_configs:
+        - role: node
+      relabel_configs:
+        - action: labelmap
+          regex: __meta_kubernetes_node_label_(.+)
+    - job_name: "kubernetes-nodes-cadvisor"
+      scheme: https
+      tls_config:
+        ca_file: /var/run/secrets/kubernetes.io/serviceaccount/ca.crt
+        insecure_skip_verify: true
+      bearer_token_file: /var/run/secrets/kubernetes.io/serviceaccount/token
+      kubernetes_sd_configs:
+        - role: node
+      metrics_path: /metrics/cadvisor
+      relabel_configs:
+        - action: labelmap
+          regex: __meta_kubernetes_node_label_(.+)
+        - source_labels: [__metrics_path__]
+          target_label: metrics_path
+      metric_relabel_configs:
+        - action: replace
+          source_labels: [pod]
+          regex: '(.+)'
+          target_label: pod_name
+          replacement: '${1}'
+        - action: replace
+          source_labels: [container]
+          regex: '(.+)'
+          target_label: container_name
+          replacement: '${1}'
+        - action: replace
+          target_label: name
+          replacement: k8s_stub
+        - action: replace
+          source_labels: [id]
+          regex: '^/system\.slice/(.+)\.service$'
+          target_label: systemd_service_name
+          replacement: '${1}'
+    # puppet-prod Consul service discovery (same targets as the puppet vmagent).
+    # consul.service.consul resolves to the puppet Consul from in-cluster pods.
+    - job_name: consul
+      consul_sd_configs:
+        - server: consul.service.consul:443
+          scheme: https
+          tls_config:
+            ca_file: /etc/vmagent-tls/ca.crt
+      relabel_configs:
+        - source_labels: [__meta_consul_tagpresent_metrics]
+          regex: "true"
+          action: keep
+        - source_labels: [__meta_consul_node, __meta_consul_service_port]
+          separator: ":"
+          target_label: __address__
+          replacement: "${1}:${2}"
+          action: replace
+        - source_labels: [__meta_consul_tag_metrics_scheme]
+          target_label: __scheme__
+          action: replace
+        - target_label: __metrics_path__
+          replacement: /metrics
+        - source_labels: [__meta_consul_tag_metrics_job]
+          target_label: job
+          action: replace
+      tls_config:
+        ca_file: /etc/vmagent-tls/ca.crt
@@ -0,0 +1,115 @@
+---
+apiVersion: operator.victoriametrics.com/v1beta1
+kind: VMCluster
+metadata:
+  name: main
+  namespace: observability
+spec:
+  retentionPeriod: "180d"
+  replicationFactor: 2
+  vmstorage:
+    replicaCount: 2
+    extraArgs:
+      dedup.minScrapeInterval: 15s
+      loggerFormat: json
+    storage:
+      volumeClaimTemplate:
+        spec:
+          storageClassName: cephrbd-fast-delete
+          accessModes:
+            - ReadWriteOnce
+          resources:
+            requests:
+              storage: 200Gi
+    resources:
+      requests:
+        cpu: "1"
+        memory: 2Gi
+      limits:
+        cpu: "2"
+        memory: 8Gi
+  vmselect:
+    replicaCount: 2
+    extraArgs:
+      dedup.minScrapeInterval: 15s
+      loggerFormat: json
+    resources:
+      requests:
+        cpu: 50m
+        memory: 128Mi
+      limits:
+        cpu: 500m
+        memory: 1024Mi
+    hpa:
+      minReplicas: 2
+      maxReplicas: 10
+      metrics:
+        - type: Resource
+          resource:
+            name: cpu
+            target:
+              type: Utilization
+              averageUtilization: 60
+      behavior:
+        scaleUp:
+          stabilizationWindowSeconds: 0
+          selectPolicy: Max
+          policies:
+            - type: Percent
+              value: 100
+              periodSeconds: 30
+            - type: Pods
+              value: 4
+              periodSeconds: 30
+        scaleDown:
+          stabilizationWindowSeconds: 300
+          selectPolicy: Min
+          policies:
+            - type: Percent
+              value: 10
+              periodSeconds: 60
+            - type: Pods
+              value: 2
+              periodSeconds: 60
+  vminsert:
+    replicaCount: 2
+    extraArgs:
+      loggerFormat: json
+    resources:
+      requests:
+        cpu: 50m
+        memory: 128Mi
+      limits:
+        cpu: 500m
+        memory: 1024Mi
+    hpa:
+      minReplicas: 2
+      maxReplicas: 10
+      metrics:
+        - type: Resource
+          resource:
+            name: cpu
+            target:
+              type: Utilization
+              averageUtilization: 60
+      behavior:
+        scaleUp:
+          stabilizationWindowSeconds: 0
+          selectPolicy: Max
+          policies:
+            - type: Percent
+              value: 100
+              periodSeconds: 30
+            - type: Pods
+              value: 4
+              periodSeconds: 30
+        scaleDown:
+          stabilizationWindowSeconds: 300
+          selectPolicy: Min
+          policies:
+            - type: Percent
+              value: 10
+              periodSeconds: 60
+            - type: Pods
+              value: 2
+              periodSeconds: 60