forked from TrueCloudLab/frostfs-http-gw
connections: normalize weights, make config a bit more human-oriented
Current scheme requires people to calculate exact percentages for their nodes. People are bad with pecentage calculations and it's really inconvenient if you have more than 3-4 nodes. What I'd like to have is ability to specify weights like weights, not percentages: .._0_WEIGHT=3 .._1_WEIGHT=1 .._2_WEIGHT=1 and let the gateway calculate things for me.
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3 changed files with 4 additions and 5 deletions
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@ -80,5 +80,5 @@ HTTP_GW_WEB_MAX_REQUEST_BODY_SIZE=4194304 - maximum request body size, server r
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Peers preset:
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HTTP_GW_PEERS_<N>_ADDRESS = string
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HTTP_GW_PEERS_<N>_WEIGHT = 0..1 (float)
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HTTP_GW_PEERS_<N>_WEIGHT = float
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```
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@ -3,7 +3,6 @@ package connections
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import (
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"context"
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"crypto/ecdsa"
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"math"
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"math/rand"
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"sync"
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"time"
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@ -40,8 +39,8 @@ func (pb *PoolBuilder) Build(ctx context.Context, options *PoolBuilderOptions) (
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for _, w := range pb.weights {
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totalWeight += w
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}
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if math.Abs(totalWeight-1.0) >= 1e-4 {
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return nil, errors.New("total weight must be equal to unity")
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for i, w := range pb.weights {
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pb.weights[i] = w / totalWeight
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}
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var cons = make([]*grpc.ClientConn, len(pb.addresses))
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for i, address := range pb.addresses {
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@ -183,7 +183,7 @@ func settings() *viper.Viper {
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fmt.Println()
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fmt.Printf("%s_%s_[N]_ADDRESS = string\n", Prefix, strings.ToUpper(cfgPeers))
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fmt.Printf("%s_%s_[N]_WEIGHT = 0..1 (float)\n", Prefix, strings.ToUpper(cfgPeers))
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fmt.Printf("%s_%s_[N]_WEIGHT = float\n", Prefix, strings.ToUpper(cfgPeers))
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os.Exit(0)
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case version != nil && *version:
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