PLT-2899 adding clustering of app servers (#3682)

* PLT-2899 adding clustering of app servers

* PLT-2899 base framework

* PLT-2899 HA backend

* PLT-2899 Fixing config file

* PLT-2899 adding config syncing

* PLT-2899 set System console to readonly when clustering enabled.

* PLT-2899 Fixing publish API

* PLT-2899 fixing strings

webapp/components/admin_console/admin_sidebar.jsx

@@ -178,6 +178,7 @@ export default class AdminSidebar extends React.Component {
         let oauthSettings = null;
         let ldapSettings = null;
         let samlSettings = null;
+        let clusterSettings = null;
         let complianceSettings = null;
 
         let license = null;
@@ -213,6 +214,20 @@ export default class AdminSidebar extends React.Component {
                 );
             }
 
+            if (global.window.mm_license.Cluster === 'true') {
+                clusterSettings = (
+                    <AdminSidebarSection
+                        name='cluster'
+                        title={
+                            <FormattedMessage
+                                id='admin.sidebar.cluster'
+                                defaultMessage='High Availability'
+                            />
+                        }
+                    />
+                );
+            }
+
             if (global.window.mm_license.SAML === 'true') {
                 samlSettings = (
                     <AdminSidebarSection
@@ -656,6 +671,7 @@ export default class AdminSidebar extends React.Component {
                                         />
                                     }
                                 />
+                                {clusterSettings}
                             </AdminSidebarSection>
                         </AdminSidebarCategory>
                         {this.renderTeams()}