added lab for removing node

README.md

@@ -2,7 +2,7 @@
 
 These labs are specific for the Operations team or any OpenShift Admin.
 
-## Lab Exercises 
+## Lab Exercises
 
 Setting up Cluster
 
@@ -27,8 +27,10 @@ Standalone Labs
 * Lab 12. [Using `oc adm top`](oc_adm_top.md)
 * Lab 13. [Idling Applications](idling_applications.md)
 * Lab 14. [Deploying Cloudforms as a container](deploying_cfme.md)
+* Lab 16. [Removing a Node from the cluster](removing_node.md)
+* Lab 17. [Reset a Node](reset_node.md)
 
-## Extended Lab Exercises 
+## Extended Lab Exercises
 
 Labs that require additional resources (e.g. storage, servers, services)
 

removing_node.md

@@ -0,0 +1,18 @@
+# Removing a node
+In this lab you will safely remove a node from the Openshift Cluster.
+
+
+$ oc get nodes
+
+## determine the node you want to remove, make it unschedulable
+$ oc adm manage-node <node>  --schedulable=false
+## ensure it is correctly labeled as unschedulable
+$ oc get nodes
+## e.g.
+## ip-172-31-21-67.us-east-2.compute.internal    Ready,SchedulingDisabled   compute   10d       v1.9.1+a0ce1bc657
+## evacuate pods
+$ oc adm drain <node> --ignore-daemonsets --delete-local-data --force
+## check that the node has no running pods
+$ oc adm manage-node <node> --list-pods
+## delete nodes
+$ oc delete node <node>