Adapts EC lab for preflight and default updates (#363)

TL;DR
-----

Corrects the Embedded Cluster lab to address changes in Embedded
Cluster preflights and Vendor Portal defaults


Details
--------

Skip host preflights by default in the Embedded Cluster lab. This is
*required* because of an incompatibility between the check for a
wildcard DNS record and the Instruqt infrastructure. Instruqt has a
wildcard DNS entry that causes the preflight to fail, and we need to
have a lab for Embedded Cluster. Since I didn't want to teach the bad
habit of ignoring preflight failures, I had to [add an environment
variable to the Embedded Cluster
CLI](replicatedhq/embedded-cluster#2364) and use it to skip the
preflights.

While I was testing the change, I realized we had issues with
inconsistencies in the defaults in the `replicated` CLI that meant
some of our customer creation steps in lab setup were failing. This
change addresses those issues.

Also removes the KOTS CLI installation process that isn't needed any
longer.

Author: crdant

instruqt/delivering-as-an-appliance/01-specifying-the-cluster/assignment.md

@@ -19,6 +19,7 @@ tabs:
   hostname: shell
 difficulty: basic
 timelimit: 300
+enhanced_loading: null
 ---
 
 A virtual Kubernetes appliance consists of your application, a Kubernetes

instruqt/delivering-as-an-appliance/01-specifying-the-cluster/setup-shell

@@ -26,3 +26,4 @@ done
 mkdir -p ${HOME_DIR}/release
 chown replicant:replicant ${HOME_DIR}/release
 chmod 755 ${HOME_DIR}/release
+

instruqt/delivering-as-an-appliance/02-customize-for-your-app/assignment.md

@@ -19,6 +19,7 @@ tabs:
   hostname: shell
 difficulty: basic
 timelimit: 300
+enhanced_loading: null
 ---
 
 The Kubernetes appliance installation is one of the first things

instruqt/delivering-as-an-appliance/03-collecting-configuration/assignment.md

@@ -22,6 +22,7 @@ tabs:
   hostname: shell
 difficulty: basic
 timelimit: 300
+enhanced_loading: null
 ---
 
 One of the benefits of building a Kubernetes appliance is providing a guided

instruqt/delivering-as-an-appliance/04-using-the-configuration/assignment.md

@@ -20,6 +20,7 @@ tabs:
   hostname: shell
 difficulty: basic
 timelimit: 300
+enhanced_loading: null
 ---
 
 The configuration screen we built looks great, guides the customer through

instruqt/delivering-as-an-appliance/05-downloading-and-installing/assignment.md

@@ -21,6 +21,7 @@ tabs:
   new_window: true
 difficulty: basic
 timelimit: 1200
+enhanced_loading: null
 ---
 
 Now that we've prepared SlackerNews for an Embedded Cluster installation,

instruqt/delivering-as-an-appliance/05-downloading-and-installing/setup-node

@@ -18,13 +18,13 @@ fi
 # download the Replicated KOTS CLI, which plugs into the `kubectl` command
 # and provides a subcommend to reset the password for the admin console
 mkdir -p /var/lib/embedded-cluster/bin
-export REPL_INSTALL_PATH=/var/lib/embedded-cluster/bin
-curl https://kots.io/install | bash
 
 agent variable set ADMIN_CONSOLE_PASSWORD "$(get_admin_console_password)"
 agent variable set SLACKERNEWS_DOMAIN get_slackernews_domain
 agent variable set ADMIN_EMAIL "${INSTRUQT_PARTICIPANT_ID}@nitflex.tv"
 agent variable set CUSTOMER_ID $(get_customer_id Nitflex)
 agent variable set LICENSE_ID $(get_license_id Nitflex)
 
+echo "export SKIP_HOST_PREFLIGHTS=true" >> /root/.bashrc
+
 exit 0

instruqt/delivering-as-an-appliance/05-downloading-and-installing/solve-node

@@ -49,6 +49,6 @@ curl -f https://replicated.app/embedded/${app_slug}/stable \
 
 echo "The install command takes a long time and Instruqt can't handle its output..."
 
-./${app_slug} install --license license.yaml --no-prompt --skip-host-preflights --admin-console-password $(agent variable get ADMIN_CONSOLE_PASSWORD) > /dev/null
+./${app_slug} install --license license.yaml --no-prompt --admin-console-password $(agent variable get ADMIN_CONSOLE_PASSWORD) > /dev/null
 
 exit 0

instruqt/delivering-as-an-appliance/06-completing-the-install/assignment.md

@@ -22,6 +22,7 @@ tabs:
   new_window: true
 difficulty: basic
 timelimit: 1200
+enhanced_loading: null
 ---
 
 We're part way through the installation of SlackerNews as a Kubernetes

instruqt/delivering-as-an-appliance/track.yml

@@ -36,9 +36,6 @@ developers:
 idle_timeout: 700
 timelimit: 2400
 lab_config:
-  overlay: false
-  width: 25
-  position: right
   sidebar_enabled: true
   feedback_recap_enabled: true
   feedback_tab_enabled: false
@@ -47,4 +44,5 @@ lab_config:
   hideStopButton: false
   default_layout: AssignmentRight
   default_layout_sidebar_size: 25
-checksum: "10811747556592817534"
+checksum: "1997671224954465538"
+enhanced_loading: false