Make sure Ansible notices migration errors.

playbooks/roles/edxapp/templates/edx/bin/edxapp-migrate-cms.j2

 {% include "edxapp_common.j2" %}
 
-if [[ -z "$NO_EDXAPP_SUDO" ]]; then
+if [[ -z "${NO_EDXAPP_SUDO:-}" ]]; then
     SUDO='sudo -E -u {{ edxapp_user }} env "PATH=$PATH"'
 fi
 
 {% for db in cms_auth_config.DATABASES.keys() %}
   {%- if db != 'read_replica' %}
-$SUDO {{ edxapp_venv_bin}}/python manage.py cms migrate --database {{ db }} --noinput --settings $EDX_PLATFORM_SETTINGS $@
+${SUDO:-} {{ edxapp_venv_bin }}/python manage.py cms migrate --database {{ db }} --noinput --settings $EDX_PLATFORM_SETTINGS $@
   {% endif %}
 {% endfor %}

playbooks/roles/edxapp/templates/edx/bin/edxapp-migrate-lms.j2

 {% include "edxapp_common.j2" %}
 
-if [[ -z "$NO_EDXAPP_SUDO" ]]; then
+if [[ -z "${NO_EDXAPP_SUDO:-}" ]]; then
     SUDO='sudo -E -u {{ edxapp_user }} env "PATH=$PATH"'
 fi
 
 {% for db in lms_auth_config.DATABASES.keys() %}
   {%- if db != 'read_replica' %}
-$SUDO {{ edxapp_venv_bin}}/python manage.py lms migrate --database {{ db }} --noinput --settings $EDX_PLATFORM_SETTINGS $@
+${SUDO:-} {{ edxapp_venv_bin }}/python manage.py lms migrate --database {{ db }} --noinput --settings $EDX_PLATFORM_SETTINGS $@
   {% endif %}
 {% endfor %}

playbooks/roles/edxapp/templates/edx/bin/edxapp_common.j2

 #!/bin/bash
+
+# Error out when any command fails.  For the migration scripts migrating multiple
+# databases this ensure migration errors for any database will be seen by Ansible.
+set -euo pipefail
+
 cd {{ edxapp_code_dir }}
 source {{ edxapp_app_dir }}/edxapp_env
 
 # The default settings set in edxapp_env can be overridden
 # using the var $EDX_PLATFORM_SETTINGS_OVERRIDE
 
-if [[ -n "$EDX_PLATFORM_SETTINGS_OVERRIDE" ]]; then
+if [[ -n "${EDX_PLATFORM_SETTINGS_OVERRIDE:-}" ]]; then
     export EDX_PLATFORM_SETTINGS="$EDX_PLATFORM_SETTINGS_OVERRIDE"
 fi
-