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8e728afa62
--endpoints is comma separated but gRPC blocks forever on comma separated lists. Instead, round-robin select endpoints when creating new connections.
53 lines
1.3 KiB
Go
53 lines
1.3 KiB
Go
// Copyright 2015 CoreOS, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package cmd
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import (
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"crypto/rand"
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"fmt"
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"os"
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"strings"
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"github.com/coreos/etcd/Godeps/_workspace/src/google.golang.org/grpc"
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)
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var (
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// dialTotal counts the number of mustCreateConn calls so that endpoint
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// connections can be handed out in round-robin order
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dialTotal int
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)
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func mustCreateConn() *grpc.ClientConn {
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eps := strings.Split(endpoints, ",")
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endpoint := eps[dialTotal%len(eps)]
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dialTotal++
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conn, err := grpc.Dial(endpoint)
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if err != nil {
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fmt.Fprintf(os.Stderr, "dial error: %v\n", err)
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os.Exit(1)
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}
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return conn
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}
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func mustRandBytes(n int) []byte {
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rb := make([]byte, n)
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_, err := rand.Read(rb)
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if err != nil {
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fmt.Fprintf(os.Stderr, "failed to generate value: %v\n", err)
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os.Exit(1)
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}
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return rb
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}
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