Cluster sync master changes (#1592)

* docker: add README for docker compose env

* docker: add vmalert Grafana dashboard

deployment/docker/README.md

@@ -0,0 +1,58 @@
+# Docker compose environment for VictoriaMetrics
+
+To spin-up VictoriaMetrics cluster, vmagent, vmalert, Alertmanager and Grafana run the following command:
+
+`docker-compose up`
+
+For single version check [docker compose in master branch](https://github.com/VictoriaMetrics/VictoriaMetrics/tree/master/deployment/docker).
+
+## VictoriaMetrics
+
+VictoriaMetrics cluster in this environment consists of 
+vminsert, vmstorage and vmselect components. Only vmselect
+has exposed port `:8481` and the rest of components are available
+only inside of environment. 
+The communication scheme between components is the following:
+* [vmagent](#vmagent) sends scraped metrics to vminsert;
+* vminsert forwards data to vmstorage;
+* vmselect is connected to vmstorage for querying data;
+* [grafana](#grafana) is configured with datasource pointing to vmselect;
+* [vmalert](#vmalert) is configured to query vmselect and send alerts state
+and recording rules to vminsert; 
+* [alertmanager](#alertmanager) is configured to receive notifications from vmalert.
+
+## vmagent
+
+vmagent is used for scraping and pushing timeseries to
+VictoriaMetrics instance. It accepts Prometheus-compatible
+configuration `prometheus.yml` with listed targets for scraping.
+
+[Web interface link](http://localhost:8429/).
+
+## vmalert
+
+vmalert evaluates alerting rules (`alerts.yml`) to track VictoriaMetrics
+health state. It is connected with AlertManager for firing alerts,
+and with VictoriaMetrics for executing queries and storing alert's state.
+
+[Web interface link](http://localhost:8880/).
+
+## alertmanager
+
+AlertManager accepts notifications from `vmalert` and fires alerts.
+All notifications are blackholed according to `alertmanager.yml` config.
+
+[Web interface link](http://localhost:9093/).
+
+## Grafana
+
+To access service open following [link](http://localhost:3000).
+
+Default creds:
+* login - `admin`
+* password - `admin`
+
+Grafana is provisioned by default with following entities:
+* VictoriaMetrics datasource
+* Prometheus datasource
+* VictoriaMetrics overview dashboard

deployment/docker/docker-compose.yml

@@ -28,6 +28,7 @@ services:
       - ./provisioning/:/etc/grafana/provisioning/
       - ./../../dashboards/victoriametrics.json:/var/lib/grafana/dashboards/vm.json
       - ./../../dashboards/vmagent.json:/var/lib/grafana/dashboards/vmagent.json
+      - ./../../dashboards/vmalert.json:/var/lib/grafana/dashboards/vmalert.json
 
   vmstorage:
     container_name: vmstorage