var fix.

playbooks/roles/insights/defaults/main.yml

@@ -18,14 +18,14 @@ INSIGHTS_CONFIG:
   # on port 8100
   DATA_API_URL: 'http://127.0.0.1:8100/api/v0'
   DATA_API_AUTH_TOKEN: 'edx'
-  SOCIAL_AUTH_EDX_OAUTH2_KEY: !!null
-  SOCIAL_AUTH_EDX_OAUTH2_SECRET: !!null
-  SOCIAL_AUTH_EDX_OAUTH2_URL_ROOT: !!null
-  SOCIAL_AUTH_EDX_OIDC_KEY: !!null
-  SOCIAL_AUTH_EDX_OIDC_SECRET: !!null
-  SOCIAL_AUTH_EDX_OIDC_URL_ROOT: !!null
+  SOCIAL_AUTH_EDX_OAUTH2_KEY: 'key'
+  SOCIAL_AUTH_EDX_OAUTH2_SECRET: 'secret'
+  SOCIAL_AUTH_EDX_OAUTH2_URL_ROOT: 'root'
+  SOCIAL_AUTH_EDX_OIDC_KEY: 'key'
+  SOCIAL_AUTH_EDX_OIDC_SECRET: 'secret'
+  SOCIAL_AUTH_EDX_OIDC_URL_ROOT: 'root'
   # This value should be the same as SOCIAL_AUTH_EDX_OIDC_SECRET
-  SOCIAL_AUTH_EDX_OIDC_ID_TOKEN_DECRYPTION_KEY: !!null
+  SOCIAL_AUTH_EDX_OIDC_ID_TOKEN_DECRYPTION_KEY: 'root'
   PLATFORM_NAME: 'edX'
   APPLICATION_NAME: 'Insights'
   CACHES:
@@ -103,6 +103,7 @@ insights_requirements:
 #
 insights_debian_pkgs:
   - 'libmysqlclient-dev'
+  - 'build-essential'
 
 insights_redhat_pkgs:
   - 'community-mysql-devel'