add rke configuration to start evicting pods at 95% instead of 80%

ansible/roles/rke_configuration/files/cluster-defaults.yml

@@ -60,6 +60,8 @@ services:
     cluster_domain: cluster.local
     extra_args:
       containerized: 'true'
+      eviction-hard: "memory.available<100Mi,nodefs.available<1Gi,imagefs.available<1Gi"
+      eviction-minimum-reclaim: "memory.available=0Mi,nodefs.available=0Mi,imagefs.available=0Gi"
     extra_binds:
     # Make local storage work with persistent volumes that use `subpath`
     # see https://open.greenhost.net/openappstack/openappstack/issues/236