Merge pull request #1 from appuio/init

Initial implementation

Author: corvus-ch

CHANGELOG.md

@@ -7,6 +7,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [Unreleased]
 ### Added
 
-- …
+- Initial implementation ([#1])
 
-[Unreleased]: https://github.com/appuio/component-openshift4-scheduling/compare/v0.1.0...HEAD
+[Unreleased]: https://github.com/appuio/component-openshift4-scheduling/compare/98c8d825204617f3b65ee72f3611c8142773acf2...HEAD
+
+[#1]: https://github.com/appuio/component-openshift4-scheduling/pull/1

README.md

@@ -1,6 +1,6 @@
 # Commodore Component: OpenShift4 Scheduler
 
-This is a [Commodore][commodore] Component for OpenShift4 Scheduler.
+This is a [Commodore][commodore] Component to configure OpenShift4 schedulers.
 
 This repository is part of Project Syn.
 For documentation on Project Syn and this component, see https://syn.tools.

class/defaults.yml

@@ -1,3 +1,7 @@
 parameters:
   openshift4_scheduling:
-    namespace: syn-openshift4-scheduling
+    namespace: openshift-kube-scheduler
+    schedulers:
+      cluster:
+        mastersSchedulable: false
+        defaultNodeSelector: node-role.kubernetes.io/app=

component/app.jsonnet

@@ -3,7 +3,7 @@ local inv = kap.inventory();
 local params = inv.parameters.openshift4_scheduling;
 local argocd = import 'lib/argocd.libjsonnet';
 
-local app = argocd.App('openshift4-scheduling', params.namespace);
+local app = argocd.App('openshift4-scheduling', params.namespace, secrets=false);
 
 {
   'openshift4-scheduling': app,

component/main.jsonnet

@@ -1,10 +1,19 @@
-// main template for openshift4-scheduling
 local kap = import 'lib/kapitan.libjsonnet';
 local kube = import 'lib/kube.libjsonnet';
 local inv = kap.inventory();
-// The hiera parameters for the component
 local params = inv.parameters.openshift4_scheduling;
 
-// Define outputs below
+local schedulers =
+  if params.schedulers != null
+  then std.objectFields(params.schedulers)
+  else [];
+
 {
+  [name]:
+    kube._Object('config.openshift.io/v1', 'Scheduler', name) {
+      spec: params.schedulers[name],
+    }
+  for name in schedulers
+} + {
+  [if std.length(schedulers) == 0 then '.gitkeep']: {},
 }

docs/modules/ROOT/pages/index.adoc

@@ -1,3 +1,15 @@
-= OpenShift4 Scheduler: A Commodore component to manage OpenShift4 Scheduler
+= OpenShift4 Scheduling: A Commodore component to manage OpenShift4 cluster schedulers
 
-{doctitle} is a Commodore component for Managing OpenShift4 Scheduler.
+{doctitle} is a Commodore component for Managing https://docs.openshift.com/container-platform/4.5/nodes/scheduling/nodes-scheduler-about.html[OpenShift4 cluster schedulers].
+
+== Default Node Selector
+
+This components assumes dedicated infra nodes are used.
+The component further assumes the existence of an _app_ node role.
+This is required to prevent regular workload from being scheduled on those infra nodes.
+
+[IMPORTANT]
+====
+Ensure that the target cluster does have nodes with the _app_ role label set.
+See the components defaults for the exact value.
+====

docs/modules/ROOT/pages/references/.gitkeep

@@ -0,0 +1,30 @@
+= Parameters
+
+The parent key for all of the following parameters is `openshift4_scheduling`.
+
+
+== `schedulers`
+
+[horizontal]
+type:: dictionary
+default:: Default `cluster` scheduler.
+
+A dictionary holding the `.spec` for schedulers.
+The keys of the dict are used as names for the schedulers.
+
+See the https://docs.openshift.com/container-platform/latest/nodes/scheduling/nodes-scheduler-default.html#nodes-scheduler-default[OpenShift docs] for available parameters.
+
+To unset all scheduling configurations, set to `null`.
+
+NOTE: This will make the scheduling unmanaged but will not reset them to OpenShift defaults.
+
+
+== Example
+
+[source,yaml]
+----
+schedulers:
+  cluster:
+    mastersSchedulable: true
+    defaultNodeSelector: node-role.kubernetes.io/worker=''
+----

docs/modules/ROOT/pages/references/parameters.adoc

@@ -1 +1,2 @@
 * xref:index.adoc[Home]
+* xref:references/parameters.adoc[Parameters]