[Bugs] [Bug 1359613] New: [RFE] Geo-replication Logging Improvements

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1359613

            Bug ID: 1359613
           Summary: [RFE] Geo-replication Logging Improvements
           Product: Red Hat Gluster Storage
           Version: 3.1
         Component: geo-replication
          Assignee: avishwan at redhat.com
          Reporter: avishwan at redhat.com
        QA Contact: storage-qa-internal at redhat.com
                CC: bugs at gluster.org, csaba at redhat.com,
                    rhs-bugs at redhat.com
        Depends On: 1359612



+++ This bug was initially created as a clone of Bug #1359612 +++

Description of problem:

Many improvements can be made to Geo-replication logs to understand the current
status and other details.

- Session Creation/Recreation - Will help to understand when session was first
created/recreated

- Log the push-pem status(Since hook script runs in background)

- On Start,
    . Monitor Start Message
    . Number of local bricks
    . Worker Start Message with respective Slave node to which it is trying to
connect
    . Agent Start Message

- Worker State Changes
    . Change in connected Slave Node
    . Change in
Status(Initializing/Active/Passive/Faulty/Stopped/Paused/Resumed)
    . Change in Crawl(Hybrid/History/Changelog)

- Checkpoint Set and Completion Time

- Sync time logs:
  If Rsync failure, Summary of errors (CHANGELOG start-end name and error)

- When Config Changed, log CONFIG_NAME OLD_VALUE and NEW_VALUE

- On worker restart,
   Log last worker's and agents uptime (Because monitor knows about it :P)

- Performance metrics: (Optional only if enabled)
    - After each Changelog batch processed
        - Number of Changelogs processed and START and END changelog
        - Number of ENTRY, DATA and META
        - Time took to Parse Changelogs, Entry Operations, Meta and Sync


Referenced Bugs:

https://bugzilla.redhat.com/show_bug.cgi?id=1359612
[Bug 1359612] [RFE] Geo-replication Logging Improvements
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