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chore: make cslb configurable (#5451)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,117 @@ | ||
| package transformerclient | ||
|
|
||
| import ( | ||
| "context" | ||
| "net" | ||
| "net/http" | ||
| "time" | ||
|
|
||
| "github.com/bufbuild/httplb" | ||
| "github.com/bufbuild/httplb/conn" | ||
| "github.com/bufbuild/httplb/picker" | ||
| "github.com/bufbuild/httplb/resolver" | ||
|
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| "github.com/rudderlabs/rudder-server/utils/sysUtils" | ||
| ) | ||
|
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| type ClientConfig struct { | ||
| TransportConfig struct { | ||
| DisableKeepAlives bool // true | ||
| MaxConnsPerHost int // 100 | ||
| MaxIdleConnsPerHost int // 10 | ||
| IdleConnTimeout time.Duration // 30*time.Second | ||
| } | ||
|
|
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| ClientTimeout time.Duration // 600*time.Second | ||
| ClientTTL time.Duration // 10*time.Second | ||
|
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| ClientType string // stdlib(default), recycled, httplb | ||
|
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| PickerType string // power_of_two(default), round_robin, least_loaded_random, least_loaded_round_robin, random | ||
| } | ||
|
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| type Client interface { | ||
| Do(req *http.Request) (*http.Response, error) | ||
| } | ||
|
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| func NewClient(config *ClientConfig) Client { | ||
| transport := &http.Transport{ | ||
| DisableKeepAlives: true, | ||
| MaxConnsPerHost: 100, | ||
| MaxIdleConnsPerHost: 10, | ||
| IdleConnTimeout: 30 * time.Second, | ||
| } | ||
| client := &http.Client{ | ||
| Transport: transport, | ||
| Timeout: 600 * time.Second, | ||
| } | ||
| if config == nil { | ||
| return client | ||
| } | ||
|
|
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| transport.DisableKeepAlives = config.TransportConfig.DisableKeepAlives | ||
| if config.TransportConfig.MaxConnsPerHost != 0 { | ||
| transport.MaxConnsPerHost = config.TransportConfig.MaxConnsPerHost | ||
| } | ||
| if config.TransportConfig.MaxIdleConnsPerHost != 0 { | ||
| transport.MaxIdleConnsPerHost = config.TransportConfig.MaxIdleConnsPerHost | ||
| } | ||
| if config.TransportConfig.IdleConnTimeout != 0 { | ||
| transport.IdleConnTimeout = config.TransportConfig.IdleConnTimeout | ||
| } | ||
|
|
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| if config.ClientTimeout != 0 { | ||
| client.Timeout = config.ClientTimeout | ||
| } | ||
|
|
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| clientTTL := 10 * time.Second | ||
| if config.ClientTTL != 0 { | ||
| clientTTL = config.ClientTTL | ||
| } | ||
|
|
||
| switch config.ClientType { | ||
| case "stdlib": | ||
| return client | ||
| case "recycled": | ||
| return sysUtils.NewRecycledHTTPClient(func() *http.Client { | ||
| return client | ||
| }, clientTTL) | ||
| case "httplb": | ||
| return httplb.NewClient( | ||
| httplb.WithRootContext(context.TODO()), | ||
| httplb.WithPicker(getPicker(config.PickerType)), | ||
| httplb.WithIdleConnectionTimeout(transport.IdleConnTimeout), | ||
| httplb.WithRequestTimeout(client.Timeout), | ||
| httplb.WithRoundTripperMaxLifetime(transport.IdleConnTimeout), | ||
| httplb.WithIdleTransportTimeout(2*transport.IdleConnTimeout), | ||
| httplb.WithResolver(resolver.NewDNSResolver(net.DefaultResolver, resolver.PreferIPv4, clientTTL)), | ||
| ) | ||
| default: | ||
| return client | ||
| } | ||
| } | ||
|
|
||
| func getPicker(pickerType string) func(prev picker.Picker, allConns conn.Conns) picker.Picker { | ||
| switch pickerType { | ||
| case "power_of_two": | ||
| return picker.NewPowerOfTwo | ||
| case "round_robin": | ||
| return picker.NewRoundRobin | ||
| case "least_loaded_random": | ||
| return picker.NewLeastLoadedRandom | ||
| case "least_loaded_round_robin": | ||
| return picker.NewLeastLoadedRoundRobin | ||
| case "random": | ||
| return picker.NewRandom | ||
| default: | ||
| return picker.NewPowerOfTwo | ||
| } | ||
| } | ||
|
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| type HTTPLBTransport struct { | ||
| *http.Transport | ||
| } | ||
|
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| func (t *HTTPLBTransport) NewRoundTripper(scheme, target string, config httplb.TransportConfig) httplb.RoundTripperResult { | ||
| return httplb.RoundTripperResult{RoundTripper: t.Transport, Close: t.CloseIdleConnections} | ||
| } |
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