coreos

README

Runnning Heapster on CoreOS

Heapster enables cluster monitoring in a CoreOS cluster using cAdvisor.

NOTE: Some of the following steps should be handled using fleet and unit files.

Step 1: Start cAdvisor on all hosts by default

gce-cloud-config-with-cadvisor.yml contains 'cadvisor.service' which can be specified as part of your cloud config to bring up cAdvisor by default on all hosts.

Step 2: Start InfluxDB and Grafana

On a CoreOS machine start InfluxDB and grafana

$ ../../influx-grafana/influxdb/start

Follow the instructions in ../../influx-grafana/grafana/README.md to start a grafana container that will serve as a dashboard for the InfluxDB instance just started.

Step 3: Start heapster coreos buddy

Heapster does not natively support CoreOS. To help with discovering all the hosts in the cluster start a heapster buddy container that will handle discovery.

$ mkdir heapster
$ docker run --name heapster-buddy --net host -d -v $PWD/heapster:/var/run/heapster vish/heapster-buddy-coreos

Step 4: Start heapster

Figure out the host where InfluxDB is running and pass that to heapster through 'INFLUXDB_HOST' environment variable.

$ docker run --name heapster -d -e INFLUXDB_HOST=<ip>:8086 -v $PWD/heapster:/var/run/heapster vish/heapster

It will help to make InfluxDB and grafana a native CoreOS service, and modify heapster to auto discover the InfluxDB service as it is done in the case of Kubernetes.