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contrib/raftexample: Allow nodes to be removed from a running cluster 

A node with ID n can be removed by DELETEing /n on the HTTP server.
release-2.3
Adam Wolfe Gordon 2016-02-05 13:13:16 -07:00
parent 7c0b6d9be9
commit 4a527be302
1 changed files with 17 additions and 0 deletions
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17
contrib/raftexample/httpapi.go
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@ -73,12 +73,29 @@ func (h *httpKVAPI) ServeHTTP(w http.ResponseWriter, r *http.Request) {
}
h.confChangeC <- cc
// As above, optimistic that raft will apply the conf change
w.WriteHeader(http.StatusNoContent)
case r.Method == "DELETE":
nodeId, err := strconv.ParseUint(key[1:], 0, 64)
if err != nil {
log.Printf("Failed to convert ID for conf change (%v)\n", err)
http.Error(w, "Failed on DELETE", http.StatusBadRequest)
return
}
cc := raftpb.ConfChange{
Type: raftpb.ConfChangeRemoveNode,
NodeID: nodeId,
}
h.confChangeC <- cc
// As above, optimistic that raft will apply the conf change
w.WriteHeader(http.StatusNoContent)
default:
w.Header().Set("Allow", "PUT")
w.Header().Add("Allow", "GET")
w.Header().Add("Allow", "POST")
w.Header().Add("Allow", "DELETE")
http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
}
}