Issue #5 - Add EFK logging install template for OCP 4.1

[themoosman]

Add template to install EFK stack on OCP 4.1.

Fully tested on a 4.1.8 cluster.

Resolves issue #5

[themoosman]

Template construction based off this OCP documentation. https://docs.openshift.com/container-platform/4.1/logging/efk-logging-deploying.html

[raffaelespazzoli]

I was working on a similar template. I think the logging stack should probably run on separate nodes. Using taints and toleration we should make sure only the logging stack ends up on those nodes. This would work similarly to how masters are kept isolated for normal workloads.
here is my recipe: https://github.com/raffaelespazzoli/openshift-enablement-exam/tree/master/misc4.0/logging

[etsauer]

@raffaelespazzoli that makes sense. how do we want to proceed? @themoosman do you have time/desire to enhance your template to add MachineSets like @raffaelespazzoli's example?

[themoosman]

Sure, I can probably get to it in the next week or so. @etsauer

[etsauer]

@themoosman cool. Just so you know, we have standard variables already in place in automation for building out the MachineSets. take a look at https://github.com/redhat-cop/operationalizing-openshift-lab/blob/master/templates/machineautoscaler.yaml#L17-L23

[themoosman]

Added support for node selectors. I made this very generic as to work with the OOTB cluster as well as any custom MachineSets.

[etsauer]

@themoosman when I try to run this, I get an error on one of the resources:

$ oc process -f templates/install-efk.yaml | oc apply -f -
namespace/openshift-logging created
namespace/openshift-operators-redhat created
operatorgroup.operators.coreos.com/openshift-operators-redhat created
operatorgroup.operators.coreos.com/openshift-logging-ogog created
catalogsourceconfig.operators.coreos.com/elasticsearch created
catalogsourceconfig.operators.coreos.com/installed-community-openshift-logging created
subscription.operators.coreos.com/elasticsearch-operator created
role.rbac.authorization.k8s.io/prometheus-k8s created
rolebinding.rbac.authorization.k8s.io/prometheus-k8s created
subscription.operators.coreos.com/cluster-logging created
error: unable to recognize no matches for kind "ClusterLogging" in version "logging.openshift.io/v1"

[themoosman]

Circling back on this. Where did we land on splitting this into 2 templates?

[etsauer]

@themoosman I think we agreed that split into two is better.