return leaderTransferee at raft status

[xiaoyulei]

return leaderTransferee when get raft status

get more detail information about raft status

[xiang90]

Can you explain your use case to justify this additional information?

[xiaoyulei]

Node A is leader, B and C is follower.
If B's logs is behind A a lot, transfer leader from A to B need more time when we set election timeout for long time. When A is transferring, it can not work. So we can know the exact state of node A if we found it not work.

[codecov-io]

Codecov Report

❗ No coverage uploaded for pull request base (master@386374a). Click here to learn what that means.
The diff coverage is 37.5%.

@@            Coverage Diff            @@
##             master    #7761   +/-   ##
=========================================
  Coverage          ?   75.59%           
=========================================
  Files             ?      336           
  Lines             ?    26393           
  Branches          ?        0           
=========================================
  Hits              ?    19953           
  Misses            ?     5000           
  Partials          ?     1440

Impacted Files	Coverage Δ
raft/status.go	27.58% <37.5%> (ø)

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[xiang90]

OK. can you also add transferee into the json marshal func?

[xiaoyulei]

@xiang90 sure, glad to do it.

[xiaoyulei]

@xiang90 I have add transferee into json marshal, PTAL

[xiang90]

@YuleiXiao Have you checked the json output is valid? can you give me an example output?

[xiaoyulei]

@xiang90

test code:

p := make(map[uint64]Progress)
	p[2] = Progress{
		Match: 3,
		Next:  4,
		State: ProgressStateReplicate,
	}
	s := Status{
		ID: uint64(1),
		HardState: pb.HardState{
			Term:   5,
			Vote:   6,
			Commit: 7,
		},
		SoftState: SoftState{
			Lead:      1,
			RaftState: StateLeader,
		},
		Applied:        100,
		Progress:       p,
		LeadTransferee: 2,
	}

	data, _ := s.MarshalJSON()

print date and check at https://jsonlint.com/:

{
	"id": "1",
	"term": 5,
	"vote": "6",
	"commit": 7,
	"lead": "1",
	"raftState": "StateLeader",
	"applied": 100,
	"progress": {
		"2": {
			"match": 3,
			"next": 4,
			"state": "ProgressStateReplicate"
		}
	},
	"leadtransferee": "2"
}

[xiang90]

lgtm