Ceph

https://docs.ceph.com/en/latest/rados/troubleshooting/log-and-debug/#confval-clog_to_syslog

only contains a small subset. See:

~/ceph/src/common/options$ git grep mon_cluster_log
global.yaml.in:  long_desc: This is useful in container environments when combined with mon_cluster_log_to_stderr.  The
global.yaml.in:  - mon_cluster_log_to_stderr
mon.yaml.in:- name: mon_cluster_log_to_stderr
mon.yaml.in:- name: mon_cluster_log_to_syslog
mon.yaml.in:- name: mon_cluster_log_to_syslog_level
mon.yaml.in:  - mon_cluster_log_to_syslog
mon.yaml.in:- name: mon_cluster_log_to_syslog_facility
mon.yaml.in:  - mon_cluster_log_to_syslog
mon.yaml.in:- name: mon_cluster_log_to_file
mon.yaml.in:  - mon_cluster_log_file
mon.yaml.in:- name: mon_cluster_log_file
mon.yaml.in:  - mon_cluster_log_to_file
mon.yaml.in:- name: mon_cluster_log_file_level
mon.yaml.in:  - mon_cluster_log_file
mon.yaml.in:- name: mon_cluster_log_to_graylog
mon.yaml.in:- name: mon_cluster_log_to_graylog_host
mon.yaml.in:  - mon_cluster_log_to_graylog
mon.yaml.in:- name: mon_cluster_log_to_graylog_port
mon.yaml.in:  - mon_cluster_log_to_graylog
mon.yaml.in:- name: mon_cluster_log_to_journald