Add metricbeat-kubernetes.

[danielballan]

This should report system metrics about each of the nodes and metrics about the state of the cluter itself.

Per instructions: https://www.elastic.co/guide/en/beats/metricbeat/current/running-on-kubernetes.html

I have deployed this like so:

$ kubectl create -f /keybase/team/edgi_wm_kube/elasticsearch-secrets.yaml 
secret/elasticsearch-secrets created
$ kubectl create -f templates/kube-system/metricbeat-kubernetes.yaml 
configmap/metricbeat-daemonset-config created
configmap/metricbeat-daemonset-modules created
daemonset.extensions/metricbeat created
configmap/metricbeat-deployment-config created
configmap/metricbeat-deployment-modules created
deployment.apps/metricbeat created
clusterrolebinding.rbac.authorization.k8s.io/metricbeat created
clusterrole.rbac.authorization.k8s.io/metricbeat created
serviceaccount/metricbeat created

But no corresponding elasticsearch indexes have appeared just yet, so there is more debugging to be done.

This relies on secrets from elasticsearch-secrets.yaml, which I have added to the keybase directory where other secrets are stored.

[Mr0grog]

Does this obviate the work in #11? (Also, wow, I didn’t realize that was still sitting unmerged.)

[Mr0grog]

Only had a chance for a suuuuper quick skim here; I think either @jsnshrmn or @ibuys should take a closer look, as they have been doing much more than me with the Kubernetes cluster. My expertise is pretty limited.

[danielballan]

Sounds good to me. Thanks for taking a look.

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