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-New logging framework in glusterfs is targeted for end users like
-customers, community members, testers etc. This aims to bring clear,
-understandable logs called user logs whereas the current logging are
-considered as developer logs. The new framework brings with following
-* Each message is logged with proper well defined error code and each
- error code has well known error message.
-* A logbook has defined error code and error messages. It helps to
- keep track of possible causes and remedies
-* Log are sent to syslog. The syslog application can be configured to
- pass them to centralized logging system
-* It brings
- - Remove repeated log messages
- - Send alerts to users on certain events
- - Run a program on events
- - Call home service on events
-Log book:
-A log book is a JSON formatted file error-codes.json located in top
-level of glusterfs source repository. At compile time,
-generates libglusterfs/src/gf-error-codes.h using the log book and
-gf-error-codes.h.template file. libglusterfs/src/gf-error-codes.h
-consists of header definitions and helper functions to get message by
-code for given locale. Currently it has _gf_get_message() function
-returns message for locale 'en'.
-New entry to log book is added like
- "IO_ERROR": {"code": 2233,
- "message": {"en": "I/O error occurred"}},
- "SETUP_ERROR": {"code": 2240,
- "message": {"en": "Setup error"}},
-The framework provides two functions
-void gf_openlog (const char *ident, int option, int facility);
-void gf_syslog (int error_code, int facility_priority, char *format, ...);
-Consumers need to call gf_openlog() prior to gf_syslog() like the way
-traditional syslog function calls. error_code is mandatory when using
-gf_syslog(). For example,
-gf_openlog (NULL, -1, -1);
-gf_syslog (GF_ERR_DEV, LOG_ERR, "error reading configuration file");
-The logs are sent in CEE format ( to syslog.
-Its targeted to rsyslog syslog server.
-This log framework is enabled at compile time by default. This can be
-disabled by passing '--disable-syslog' to ./configure or '--without
-syslog' to rpmbuild
-Even though its enabled at compile time, its required to have
-/etc/glusterfs/logger.conf file to make it into effect before starting
-gluster services
-Currently all gluster logs are sent with error code GF_ERR_DEV.