v-m: Scrape all metrics components

We are now getting metrics from *vmstorage*, *vminsert*, *vmselect*,
*vmalert*, *alertmanaer*, and *blackbox-exporter*, in addition to
*vmagent*.

victoria-metrics/scrape.yml

@@ -2,15 +2,23 @@ global:
   scrape_interval: 1m
 
 scrape_configs:
-- job_name: vmagent
+- job_name: victoria-metrics
   kubernetes_sd_configs:
   - role: pod
     namespaces:
       own_namespace: true
-    selectors:
-    - role: pod
-      label: app.kubernetes.io/name=vmagent
   relabel_configs:
+  - source_labels:
+    - __meta_kubernetes_pod_container_name
+    - __meta_kubernetes_pod_container_port_name
+    separator: ':'
+    regex: 'vmstorage:(vminsert|vmselect)'
+    action: drop
+  - source_labels:
+    - __meta_kubernetes_pod_container_name
+    regex: vmalert
+    target_label: __metrics_path__
+    replacement: /vmalert/metrics
   - target_label: instance
     source_labels:
     - __meta_kubernetes_pod_name