I wondered why /edx/var/log/edxapp/{lms,cms} existed empty

It was because we had a task to create those subdirs but then passed
along LOG_DIR differently.

However, LOG_DIR was wrong because it used /edx/var/logs/edx and logs
doesn't exist at all.

Luckily, we use syslog to actually log, and *that* uses
/edx/var/log/edx/{lms,cms}/edx.log

playbooks/roles/edxapp/defaults/main.yml

@@ -905,7 +905,7 @@ EDXAPP_PASSWORD_POLICY_COMPLIANCE_ROLLOUT_CONFIG:
 
 edxapp_data_dir: "{{ COMMON_DATA_DIR }}/edxapp"
 edxapp_app_dir: "{{ COMMON_APP_DIR }}/edxapp"
-edxapp_log_dir: "{{ COMMON_LOG_DIR }}/edxapp"
+edxapp_log_dir: "{{ COMMON_LOG_DIR }}/edx"
 edxapp_venvs_dir: "{{ edxapp_app_dir }}/venvs"
 edxapp_venv_dir: "{{ edxapp_venvs_dir }}/edxapp"
 edxapp_venv_bin: "{{ edxapp_venv_dir }}/bin"
@@ -1163,7 +1163,7 @@ generic_env_config:  &edxapp_generic_env
   FEATURES: "{{ EDXAPP_FEATURES }}"
   WIKI_ENABLED: true
   SYSLOG_SERVER:  "{{ EDXAPP_SYSLOG_SERVER }}"
-  LOG_DIR:  "{{ COMMON_DATA_DIR }}/logs/edx"
+  LOG_DIR:  "{{ edxapp_log_dir }}"
   JWT_ISSUER: "{{ EDXAPP_LMS_ISSUER }}"
   DEFAULT_JWT_ISSUER:
     ISSUER: "{{ EDXAPP_LMS_ISSUER }}"