From 7fa934cfa86e2912244413253fdc6b526236a10c Mon Sep 17 00:00:00 2001
From: Cody Jackson <cody@rancher.com>
Date: Wed, 4 Aug 2021 12:25:53 -0700
Subject: [PATCH] Inform the users that legacy features aren't supported in k8s
 1.21+

https://github.com/rancher/dashboard/issues/3589
---
 assets/translations/en-us.yaml               |  1 +
 edit/provisioning.cattle.io.cluster/rke2.vue | 16 +++++++++++++++-
 2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/assets/translations/en-us.yaml b/assets/translations/en-us.yaml
index 324666729a..01bfac548e 100644
--- a/assets/translations/en-us.yaml
+++ b/assets/translations/en-us.yaml
@@ -994,6 +994,7 @@ cluster:
   kubernetesVersion:
     label: Kubernetes Version
   toolsTip: Use the new Cluster Tools to manage and install Monitoring, Logging and other tools
+  legacyWarning: The legacy feature flag is enabled and not all legacy features are supported in Kubernetes 1.21+.
   name:
     label: Cluster Name
     placeholder: A unique name for the cluster
diff --git a/edit/provisioning.cattle.io.cluster/rke2.vue b/edit/provisioning.cattle.io.cluster/rke2.vue
index 55d2e3a6ed..089538f200 100644
--- a/edit/provisioning.cattle.io.cluster/rke2.vue
+++ b/edit/provisioning.cattle.io.cluster/rke2.vue
@@ -37,6 +37,8 @@ import Questions from '@/components/Questions';
 
 import { normalizeName } from '@/components/form/NameNsDescription.vue';
 import ClusterMembershipEditor from '@/components/form/Members/ClusterMembershipEditor';
+import { LEGACY } from '@/store/features';
+import semver from 'semver';
 import ACE from './ACE';
 import AgentEnv from './AgentEnv';
 import DrainOptions from './DrainOptions';
@@ -239,6 +241,7 @@ export default {
 
   computed: {
     ...mapGetters({ allCharts: 'catalog/charts' }),
+    ...mapGetters({ features: 'features/get' }),
 
     rkeConfig() {
       return this.value.spec.rkeConfig;
@@ -590,6 +593,17 @@ export default {
 
       return versions.filter(x => !!x);
     },
+
+    showk8s21LegacyWarning() {
+      const isLegacyEnabled = this.features(LEGACY);
+
+      if (!isLegacyEnabled) {
+        return false;
+      }
+      const selectedVersion = semver.coerce(this.value.spec.kubernetesVersion);
+
+      return semver.satisfies(selectedVersion, '>=1.21.0');
+    }
   },
 
   watch: {
@@ -1014,7 +1028,7 @@ export default {
       <Tabbed :side-tabs="true">
         <Tab name="basic" label-key="cluster.tabs.basic" :weight="11" @active="refreshYamls">
           <Banner v-if="!haveArgInfo" color="warning" label="Configuration information is not available for the selected Kubernetes version.  The options available in this screen will be limited, you may want to use the YAML editor." />
-
+          <Banner v-if="showk8s21LegacyWarning" color="warning" :label="t('cluster.legacyWarning')" />
           <div class="row">
             <div class="col" :class="{'span-4': showCni, 'span-6': !showCni}">
               <LabeledSelect