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-
-How to introduce new daemons using daemon management framework
-==============================================================
-Glusterd manages GlusterFS daemons providing services like NFS, Proactive
-self-heal, Quota, User servicable snapshots etc. Following are some of the
-aspects that come under daemon management.
-
-Data members & functions of different management objects
-
-- **Connection Management**
- - unix domain sockets based channel for internal communication
- - rpc connection for the communication
- - frame timeout value for UDS
- - Methods - notify
- - init, connect, termination, disconnect APIs can be invoked using the
- connection management object
-
-- **Process Management**
- - Name of the process
- - pidfile to detect if the daemon is running
- - loggging directory, log file, volfile, volfileserver & volfileid
- - init, stop APIs can be invoked using the process management object
-
-- **Service Management**
- - connection object
- - process object
- - online status
- - Methods - manager, start, stop which can be abstracted as a common methods
- or specific to service requirements
- - init API can be invoked using the service management object
-
- The above structures defines the skeleton of the daemon management framework.
- Introduction of new daemons in GlusterFS needs to inherit these properties. Any
- requirement specific to a daemon needs to be implemented in its own service
- (for eg : snapd defines its own type glusterd_snapdsvc_t using glusterd_svc_t
- and snapd specific data). New daemons will need to have its own service specific
- code written in glusterd-<feature>-svc.h{c} and need to reuse the existing
- framework.