Mode: Default value: Docker, Service operation mode. Docker: Container mode; Native: Progress model 
Grace: Default value: 30s, Time-out period of graceful service exit 
server: Master program API Server configuration item 
  address: Environmental variable may be read by default: OPENEDGE_MASTER_API, Master program API Server address 
  timeout: Default value: 30s, Master program API Server request time-out period 
logger: Log configuration item 
  path: It is empty by default, i.e., no file is printed; if a file is appointed, it will be output to file. 
  level: Default value: Info, log level, supporting debug, info, warn and error. 
  format: Default value: Text, log print format, supporting text and json 
  age: 
    max: Default value: 15, Maximum number of days a log file is retained 
  size: 
    max: Default value: 50, Log file size limit, unit MB 
  backup: 
    max: Default value: 15, Maximum number of log files retained.