cadvisor (#1449)

* cadvisor

* more docs

Author: skudasov

book/src/framework/observability/metrics.md

@@ -2,10 +2,18 @@
 
 We use Prometheus to collect metrics of Chainlink nodes and other services.
 
+Check [Prometheus UI](http://localhost:9090/query).
+
 Check [Grafana](http://localhost:3000/explore?panes=%7B%22gGs%22:%7B%22datasource%22:%22PBFA97CFB590B2093%22,%22queries%22:%5B%7B%22refId%22:%22A%22,%22expr%22:%22%7Bjob%3D%5C%22ctf%5C%22%7D%22,%22range%22:true,%22instant%22:true,%22datasource%22:%7B%22type%22:%22prometheus%22,%22uid%22:%22PBFA97CFB590B2093%22%7D,%22editorMode%22:%22code%22,%22legendFormat%22:%22__auto%22%7D%5D,%22range%22:%7B%22from%22:%22now-5m%22,%22to%22:%22now%22%7D%7D%7D&schemaVersion=1&orgId=1) example query.
 
 Queries:
 - All metrics of all containers
 ```json
 {job="ctf"}
-```
+```
+
+## Docker Resources
+
+We are using [cadvisor](https://github.com/google/cadvisor) to monitor resources of test [containers](http://localhost:3000/d/pMEd7m0Mz/cadvisor-exporter?orgId=1).
+
+Cadvisor UI can be found [here](http://localhost:8085/containers/)

framework/.changeset/v0.3.5.md

@@ -0,0 +1,2 @@
+- Add cadvisor support to "ctf obs up"
+- Add cadvisor dashboard

framework/cmd/observability/compose/conf/prometheus.yml

@@ -11,3 +11,8 @@ scrape_configs:
       - source_labels: [ __meta_docker_port_private ]
         regex: '6688'
         action: keep
+  - job_name: cadvisor
+    scrape_interval: 10s
+    static_configs:
+      - targets:
+          - cadvisor:8080