perf: use fasthttp for health checks; upgrade go to 1.25.3

This commit is contained in:
yusing
2025-10-17 22:50:13 +08:00
parent 3e73be60a1
commit 5a91db8d10
12 changed files with 172 additions and 144 deletions

View File

@@ -1,6 +1,6 @@
module github.com/yusing/godoxy/agent
go 1.25.2
go 1.25.3
replace github.com/yusing/godoxy => ..
@@ -19,15 +19,17 @@ require (
github.com/puzpuzpuz/xsync/v4 v4.2.0
github.com/rs/zerolog v1.34.0
github.com/stretchr/testify v1.11.1
github.com/yusing/godoxy v0.18.6
github.com/valyala/fasthttp v1.67.0
github.com/yusing/godoxy v0.19.2
github.com/yusing/godoxy/socketproxy v0.0.0-00010101000000-000000000000
github.com/yusing/goutils v0.6.1
github.com/yusing/goutils v0.7.0
)
require (
github.com/Azure/go-ansiterm v0.0.0-20250102033503-faa5f7b0171c // indirect
github.com/Microsoft/go-winio v0.6.2 // indirect
github.com/PuerkitoBio/goquery v1.10.3 // indirect
github.com/andybalholm/brotli v1.2.0 // indirect
github.com/andybalholm/cascadia v1.3.3 // indirect
github.com/bytedance/gopkg v0.1.3 // indirect
github.com/bytedance/sonic/loader v0.3.0 // indirect
@@ -55,12 +57,13 @@ require (
github.com/goccy/go-yaml v1.18.0 // indirect
github.com/gorilla/mux v1.8.1 // indirect
github.com/gotify/server/v2 v2.7.3 // indirect
github.com/grpc-ecosystem/grpc-gateway/v2 v2.27.2 // indirect
github.com/grpc-ecosystem/grpc-gateway/v2 v2.27.3 // indirect
github.com/json-iterator/go v1.1.13-0.20220915233716-71ac16282d12 // indirect
github.com/klauspost/compress v1.18.0 // indirect
github.com/klauspost/cpuid/v2 v2.3.0 // indirect
github.com/leodido/go-urn v1.4.0 // indirect
github.com/lithammer/fuzzysearch v1.1.8 // indirect
github.com/lufia/plan9stats v0.0.0-20250827001030-24949be3fa54 // indirect
github.com/lufia/plan9stats v0.0.0-20251013123823-9fd1530e3ec3 // indirect
github.com/mattn/go-colorable v0.1.14 // indirect
github.com/mattn/go-isatty v0.0.20 // indirect
github.com/moby/docker-image-spec v1.3.1 // indirect
@@ -85,6 +88,7 @@ require (
github.com/tklauser/numcpus v0.10.0 // indirect
github.com/twitchyliquid64/golang-asm v0.15.1 // indirect
github.com/ugorji/go/codec v1.3.0 // indirect
github.com/valyala/bytebufferpool v1.0.0 // indirect
github.com/vincent-petithory/dataurl v1.0.0 // indirect
github.com/yusing/ds v0.2.0 // indirect
github.com/yusing/gointernals v0.1.16 // indirect
@@ -92,10 +96,10 @@ require (
go.opentelemetry.io/auto/sdk v1.2.1 // indirect
go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.63.0 // indirect
go.opentelemetry.io/otel v1.38.0 // indirect
go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.37.0 // indirect
go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.38.0 // indirect
go.opentelemetry.io/otel/metric v1.38.0 // indirect
go.opentelemetry.io/otel/trace v1.38.0 // indirect
go.opentelemetry.io/proto/otlp v1.7.1 // indirect
go.opentelemetry.io/proto/otlp v1.8.0 // indirect
go.uber.org/atomic v1.11.0 // indirect
golang.org/x/arch v0.22.0 // indirect
golang.org/x/crypto v0.43.0 // indirect

View File

@@ -4,6 +4,8 @@ github.com/Microsoft/go-winio v0.6.2 h1:F2VQgta7ecxGYO8k3ZZz3RS8fVIXVxONVUPlNERo
github.com/Microsoft/go-winio v0.6.2/go.mod h1:yd8OoFMLzJbo9gZq8j5qaps8bJ9aShtEA8Ipt1oGCvU=
github.com/PuerkitoBio/goquery v1.10.3 h1:pFYcNSqHxBD06Fpj/KsbStFRsgRATgnf3LeXiUkhzPo=
github.com/PuerkitoBio/goquery v1.10.3/go.mod h1:tMUX0zDMHXYlAQk6p35XxQMqMweEKB7iK7iLNd4RH4Y=
github.com/andybalholm/brotli v1.2.0 h1:ukwgCxwYrmACq68yiUqwIWnGY0cTPox/M94sVwToPjQ=
github.com/andybalholm/brotli v1.2.0/go.mod h1:rzTDkvFWvIrjDXZHkuS16NPggd91W3kUSvPlQ1pLaKY=
github.com/andybalholm/cascadia v1.3.3 h1:AG2YHrzJIm4BZ19iwJ/DAua6Btl3IwJX+VI4kktS1LM=
github.com/andybalholm/cascadia v1.3.3/go.mod h1:xNd9bqTn98Ln4DwST8/nG+H0yuB8Hmgu1YHNnWw0GeA=
github.com/buger/goterm v1.0.4 h1:Z9YvGmOih81P0FbVtEYTFF6YsSgxSUKEhf/f9bTMXbY=
@@ -100,12 +102,14 @@ github.com/gorilla/websocket v1.5.3 h1:saDtZ6Pbx/0u+bgYQ3q96pZgCzfhKXGPqt7kZ72aN
github.com/gorilla/websocket v1.5.3/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
github.com/gotify/server/v2 v2.7.3 h1:nro/ZnxdlZFvxFcw9LREGA8zdk6CK744azwhuhX/A4g=
github.com/gotify/server/v2 v2.7.3/go.mod h1:VAtE1RIc/2j886PYs9WPQbMjqbFsoyQ0G8IdFtnAxU0=
github.com/grpc-ecosystem/grpc-gateway/v2 v2.27.2 h1:8Tjv8EJ+pM1xP8mK6egEbD1OgnVTyacbefKhmbLhIhU=
github.com/grpc-ecosystem/grpc-gateway/v2 v2.27.2/go.mod h1:pkJQ2tZHJ0aFOVEEot6oZmaVEZcRme73eIFmhiVuRWs=
github.com/grpc-ecosystem/grpc-gateway/v2 v2.27.3 h1:NmZ1PKzSTQbuGHw9DGPFomqkkLWMC+vZCkfs+FHv1Vg=
github.com/grpc-ecosystem/grpc-gateway/v2 v2.27.3/go.mod h1:zQrxl1YP88HQlA6i9c63DSVPFklWpGX4OWAc9bFuaH4=
github.com/jinzhu/copier v0.4.0 h1:w3ciUoD19shMCRargcpm0cm91ytaBhDvuRpz1ODO/U8=
github.com/jinzhu/copier v0.4.0/go.mod h1:DfbEm0FYsaqBcKcFuvmOZb218JkPGtvSHsKg8S8hyyg=
github.com/json-iterator/go v1.1.13-0.20220915233716-71ac16282d12 h1:9Nu54bhS/H/Kgo2/7xNSUuC5G28VR8ljfrLKU2G4IjU=
github.com/json-iterator/go v1.1.13-0.20220915233716-71ac16282d12/go.mod h1:TBzl5BIHNXfS9+C35ZyJaklL7mLDbgUkcgXzSLa8Tk0=
github.com/klauspost/compress v1.18.0 h1:c/Cqfb0r+Yi+JtIEq73FWXVkRonBlf0CRNYc8Zttxdo=
github.com/klauspost/compress v1.18.0/go.mod h1:2Pp+KzxcywXVXMr50+X0Q/Lsb43OQHYWRCY2AiWywWQ=
github.com/klauspost/cpuid/v2 v2.3.0 h1:S4CRMLnYUhGeDFDqkGriYKdfoFlDnMtqTiI/sFzhA9Y=
github.com/klauspost/cpuid/v2 v2.3.0/go.mod h1:hqwkgyIinND0mEev00jJYCxPNVRVXFQeu1XKlok6oO0=
github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
@@ -116,8 +120,8 @@ github.com/leodido/go-urn v1.4.0 h1:WT9HwE9SGECu3lg4d/dIA+jxlljEa1/ffXKmRjqdmIQ=
github.com/leodido/go-urn v1.4.0/go.mod h1:bvxc+MVxLKB4z00jd1z+Dvzr47oO32F/QSNjSBOlFxI=
github.com/lithammer/fuzzysearch v1.1.8 h1:/HIuJnjHuXS8bKaiTMeeDlW2/AyIWk2brx1V8LFgLN4=
github.com/lithammer/fuzzysearch v1.1.8/go.mod h1:IdqeyBClc3FFqSzYq/MXESsS4S0FsZ5ajtkr5xPLts4=
github.com/lufia/plan9stats v0.0.0-20250827001030-24949be3fa54 h1:mFWunSatvkQQDhpdyuFAYwyAan3hzCuma+Pz8sqvOfg=
github.com/lufia/plan9stats v0.0.0-20250827001030-24949be3fa54/go.mod h1:autxFIvghDt3jPTLoqZ9OZ7s9qTGNAWmYCjVFWPX/zg=
github.com/lufia/plan9stats v0.0.0-20251013123823-9fd1530e3ec3 h1:PwQumkgq4/acIiZhtifTV5OUqqiP82UAl0h87xj/l9k=
github.com/lufia/plan9stats v0.0.0-20251013123823-9fd1530e3ec3/go.mod h1:autxFIvghDt3jPTLoqZ9OZ7s9qTGNAWmYCjVFWPX/zg=
github.com/luthermonson/go-proxmox v0.2.3 h1:NAjUJ5Jd1ynIK6UHMGd/VLGgNZWpGXhfL+DBmAVSEaA=
github.com/luthermonson/go-proxmox v0.2.3/go.mod h1:oyFgg2WwTEIF0rP6ppjiixOHa5ebK1p8OaRiFhvICBQ=
github.com/magefile/mage v1.15.0 h1:BvGheCMAsG3bWUDbZ8AyXXpCNwU9u5CB6sM+HNb9HYg=
@@ -201,8 +205,14 @@ github.com/twitchyliquid64/golang-asm v0.15.1 h1:SU5vSMR7hnwNxj24w34ZyCi/FmDZTkS
github.com/twitchyliquid64/golang-asm v0.15.1/go.mod h1:a1lVb/DtPvCB8fslRZhAngC2+aY1QWCk3Cedj/Gdt08=
github.com/ugorji/go/codec v1.3.0 h1:Qd2W2sQawAfG8XSvzwhBeoGq71zXOC/Q1E9y/wUcsUA=
github.com/ugorji/go/codec v1.3.0/go.mod h1:pRBVtBSKl77K30Bv8R2P+cLSGaTtex6fsA2Wjqmfxj4=
github.com/valyala/bytebufferpool v1.0.0 h1:GqA5TC/0021Y/b9FG4Oi9Mr3q7XYx6KllzawFIhcdPw=
github.com/valyala/bytebufferpool v1.0.0/go.mod h1:6bBcMArwyJ5K/AmCkWv1jt77kVWyCJ6HpOuEn7z0Csc=
github.com/valyala/fasthttp v1.67.0 h1:tqKlJMUP6iuNG8hGjK/s9J4kadH7HLV4ijEcPGsezac=
github.com/valyala/fasthttp v1.67.0/go.mod h1:qYSIpqt/0XNmShgo/8Aq8E3UYWVVwNS2QYmzd8WIEPM=
github.com/vincent-petithory/dataurl v1.0.0 h1:cXw+kPto8NLuJtlMsI152irrVw9fRDX8AbShPRpg2CI=
github.com/vincent-petithory/dataurl v1.0.0/go.mod h1:FHafX5vmDzyP+1CQATJn7WFKc9CvnvxyvZy6I1MrG/U=
github.com/xyproto/randomstring v1.0.5 h1:YtlWPoRdgMu3NZtP45drfy1GKoojuR7hmRcnhZqKjWU=
github.com/xyproto/randomstring v1.0.5/go.mod h1:rgmS5DeNXLivK7YprL0pY+lTuhNQW3iGxZ18UQApw/E=
github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
github.com/yusing/ds v0.2.0 h1:lPhDU5eA2uvquVrBrzLCrQXRJJgSXlUYA53TbuK2sQY=
github.com/yusing/ds v0.2.0/go.mod h1:XhKV4l7cZwBbbl7lRzNC9zX27zvCM0frIwiuD40ULRk=
@@ -216,8 +226,8 @@ go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.63.0 h1:RbKq8BG
go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.63.0/go.mod h1:h06DGIukJOevXaj/xrNjhi/2098RZzcLTbc0jDAUbsg=
go.opentelemetry.io/otel v1.38.0 h1:RkfdswUDRimDg0m2Az18RKOsnI8UDzppJAtj01/Ymk8=
go.opentelemetry.io/otel v1.38.0/go.mod h1:zcmtmQ1+YmQM9wrNsTGV/q/uyusom3P8RxwExxkZhjM=
go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.37.0 h1:Ahq7pZmv87yiyn3jeFz/LekZmPLLdKejuO3NcK9MssM=
go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.37.0/go.mod h1:MJTqhM0im3mRLw1i8uGHnCvUEeS7VwRyxlLC78PA18M=
go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.38.0 h1:GqRJVj7UmLjCVyVJ3ZFLdPRmhDUp2zFmQe3RHIOsw24=
go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.38.0/go.mod h1:ri3aaHSmCTVYu2AWv44YMauwAQc0aqI9gHKIcSbI1pU=
go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.37.0 h1:bDMKF3RUSxshZ5OjOTi8rsHGaPKsAt76FaqgvIUySLc=
go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.37.0/go.mod h1:dDT67G/IkA46Mr2l9Uj7HsQVwsjASyV9SjGofsiUZDA=
go.opentelemetry.io/otel/metric v1.38.0 h1:Kl6lzIYGAh5M159u9NgiRkmoMKjvbsKtYRwgfrA6WpA=
@@ -228,8 +238,8 @@ go.opentelemetry.io/otel/sdk/metric v1.38.0 h1:aSH66iL0aZqo//xXzQLYozmWrXxyFkBJ6
go.opentelemetry.io/otel/sdk/metric v1.38.0/go.mod h1:dg9PBnW9XdQ1Hd6ZnRz689CbtrUp0wMMs9iPcgT9EZA=
go.opentelemetry.io/otel/trace v1.38.0 h1:Fxk5bKrDZJUH+AMyyIXGcFAPah0oRcT+LuNtJrmcNLE=
go.opentelemetry.io/otel/trace v1.38.0/go.mod h1:j1P9ivuFsTceSWe1oY+EeW3sc+Pp42sO++GHkg4wwhs=
go.opentelemetry.io/proto/otlp v1.7.1 h1:gTOMpGDb0WTBOP8JaO72iL3auEZhVmAQg4ipjOVAtj4=
go.opentelemetry.io/proto/otlp v1.7.1/go.mod h1:b2rVh6rfI/s2pHWNlB7ILJcRALpcNDzKhACevjI+ZnE=
go.opentelemetry.io/proto/otlp v1.8.0 h1:fRAZQDcAFHySxpJ1TwlA1cJ4tvcrw7nXl9xWWC8N5CE=
go.opentelemetry.io/proto/otlp v1.8.0/go.mod h1:tIeYOeNBU4cvmPqpaji1P+KbB4Oloai8wN4rWzRrFF0=
go.uber.org/atomic v1.11.0 h1:ZvwS0R+56ePWxUNi+Atn9dWONBPp/AUETXlHW0DxSjE=
go.uber.org/atomic v1.11.0/go.mod h1:LUxbIzbOniOlMKjJjyPfpl4v+PKK2cNJn91OQbhoJI0=
go.uber.org/mock v0.6.0 h1:hyF9dfmbgIX5EfOdasqLsWD6xqpNZlXblLB/Dbnwv3Y=
@@ -325,10 +335,10 @@ golang.org/x/tools v0.38.0 h1:Hx2Xv8hISq8Lm16jvBZ2VQf+RLmbd7wVUsALibYI/IQ=
golang.org/x/tools v0.38.0/go.mod h1:yEsQ/d/YK8cjh0L6rZlY8tgtlKiBNTL14pGDJPJpYQs=
golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
google.golang.org/genproto v0.0.0-20250908214217-97024824d090 h1:ywCL7vA2n3vVHyf+bx1ZV/knaTPRI8GIeKY0MEhEeOc=
google.golang.org/genproto/googleapis/api v0.0.0-20250826171959-ef028d996bc1 h1:APHvLLYBhtZvsbnpkfknDZ7NyH4z5+ub/I0u8L3Oz6g=
google.golang.org/genproto/googleapis/api v0.0.0-20250826171959-ef028d996bc1/go.mod h1:xUjFWUnWDpZ/C0Gu0qloASKFb6f8/QXiiXhSPFsD668=
google.golang.org/genproto/googleapis/rpc v0.0.0-20251007200510-49b9836ed3ff h1:A90eA31Wq6HOMIQlLfzFwzqGKBTuaVztYu/g8sn+8Zc=
google.golang.org/genproto/googleapis/rpc v0.0.0-20251007200510-49b9836ed3ff/go.mod h1:7i2o+ce6H/6BluujYR+kqX3GKH+dChPTQU19wjRPiGk=
google.golang.org/genproto/googleapis/api v0.0.0-20250929231259-57b25ae835d4 h1:8XJ4pajGwOlasW+L13MnEGA8W4115jJySQtVfS2/IBU=
google.golang.org/genproto/googleapis/api v0.0.0-20250929231259-57b25ae835d4/go.mod h1:NnuHhy+bxcg30o7FnVAZbXsPHUDQ9qKWAQKCD7VxFtk=
google.golang.org/genproto/googleapis/rpc v0.0.0-20251014184007-4626949a642f h1:1FTH6cpXFsENbPR5Bu8NQddPSaUUE6NA2XdZdDSAJK4=
google.golang.org/genproto/googleapis/rpc v0.0.0-20251014184007-4626949a642f/go.mod h1:7i2o+ce6H/6BluujYR+kqX3GKH+dChPTQU19wjRPiGk=
google.golang.org/grpc v1.76.0 h1:UnVkv1+uMLYXoIz6o7chp59WfQUYA2ex/BXQ9rHZu7A=
google.golang.org/grpc v1.76.0/go.mod h1:Ju12QI8M6iQJtbcsV+awF5a4hfJMLi4X0JLo94ULZ6c=
google.golang.org/protobuf v1.36.10 h1:AYd7cD/uASjIL6Q9LiTjz8JLcrh/88q5UObnmY3aOOE=

View File

@@ -15,6 +15,7 @@ import (
"github.com/rs/zerolog"
"github.com/rs/zerolog/log"
"github.com/valyala/fasthttp"
"github.com/yusing/godoxy/agent/pkg/certs"
"github.com/yusing/goutils/version"
)
@@ -25,10 +26,10 @@ type AgentConfig struct {
Version version.Version `json:"version"`
Runtime ContainerRuntime `json:"runtime"`
httpClient *http.Client
httpClientHealthCheck *http.Client
tlsConfig tls.Config
l zerolog.Logger
httpClient *http.Client
fasthttpClientHealthCheck *fasthttp.Client
tlsConfig tls.Config
l zerolog.Logger
} // @name Agent
const (
@@ -107,8 +108,7 @@ func (cfg *AgentConfig) StartWithCerts(ctx context.Context, ca, crt, key []byte)
cfg.httpClient = cfg.NewHTTPClient()
applyNormalTransportConfig(cfg.httpClient)
cfg.httpClientHealthCheck = cfg.NewHTTPClient()
applyHealthCheckTransportConfig(cfg.httpClientHealthCheck)
cfg.fasthttpClientHealthCheck = cfg.NewFastHTTPHealthCheckClient()
ctx, cancel := context.WithTimeout(ctx, 5*time.Second)
defer cancel()
@@ -188,6 +188,25 @@ func (cfg *AgentConfig) NewHTTPClient() *http.Client {
}
}
func (cfg *AgentConfig) NewFastHTTPHealthCheckClient() *fasthttp.Client {
return &fasthttp.Client{
Dial: func(addr string) (net.Conn, error) {
if addr != AgentHost+":443" {
return nil, &net.AddrError{Err: "invalid address", Addr: addr}
}
return net.Dial("tcp", cfg.Addr)
},
TLSConfig: &cfg.tlsConfig,
ReadTimeout: 5 * time.Second,
WriteTimeout: 3 * time.Second,
DisableHeaderNamesNormalizing: true,
DisablePathNormalizing: true,
NoDefaultUserAgentHeader: true,
ReadBufferSize: 1024,
WriteBufferSize: 1024,
}
}
func (cfg *AgentConfig) Transport() *http.Transport {
return &http.Transport{
DialContext: func(ctx context.Context, network, addr string) (net.Conn, error) {
@@ -220,13 +239,3 @@ func applyNormalTransportConfig(client *http.Client) {
transport.ReadBufferSize = 16384
transport.WriteBufferSize = 16384
}
func applyHealthCheckTransportConfig(client *http.Client) {
transport := client.Transport.(*http.Transport)
transport.DisableKeepAlives = true
transport.DisableCompression = true
transport.MaxIdleConns = 1
transport.MaxIdleConnsPerHost = 1
transport.ReadBufferSize = 1024
transport.WriteBufferSize = 1024
}

View File

@@ -2,10 +2,14 @@ package agent
import (
"context"
"fmt"
"io"
"net/http"
"time"
"github.com/bytedance/sonic"
"github.com/gorilla/websocket"
"github.com/valyala/fasthttp"
httputils "github.com/yusing/goutils/http"
"github.com/yusing/goutils/http/reverseproxy"
)
@@ -30,15 +34,44 @@ func (cfg *AgentConfig) Forward(req *http.Request, endpoint string) (*http.Respo
return resp, nil
}
func (cfg *AgentConfig) DoHealthCheck(ctx context.Context, endpoint string) (*http.Response, error) {
req, err := http.NewRequestWithContext(ctx, "GET", APIBaseURL+endpoint, nil)
if err != nil {
return nil, err
}
req.Header.Set("Accept-Encoding", "identity")
req.Header.Set("Connection", "close")
type HealthCheckResponse struct {
Healthy bool `json:"healthy"`
Detail string `json:"detail"`
Latency time.Duration `json:"latency"`
}
return cfg.httpClientHealthCheck.Do(req)
func (cfg *AgentConfig) DoHealthCheck(timeout time.Duration, query string) (ret HealthCheckResponse, err error) {
req := fasthttp.AcquireRequest()
defer fasthttp.ReleaseRequest(req)
resp := fasthttp.AcquireResponse()
defer fasthttp.ReleaseResponse(resp)
req.SetRequestURI(APIBaseURL + EndpointHealth + "?" + query)
req.Header.SetMethod(fasthttp.MethodGet)
req.Header.Set("Accept-Encoding", "identity")
req.SetConnectionClose()
start := time.Now()
err = cfg.fasthttpClientHealthCheck.DoTimeout(req, resp, timeout)
ret.Latency = time.Since(start)
if err != nil {
return ret, err
}
if status := resp.StatusCode(); status != http.StatusOK {
// clone body since fasthttp response will be released
body := resp.Body()
cloneBody := make([]byte, len(body))
copy(cloneBody, body)
return ret, fmt.Errorf("HTTP %d %s", status, cloneBody)
} else {
err = sonic.Unmarshal(resp.Body(), &ret)
if err != nil {
return ret, err
}
}
return ret, nil
}
func (cfg *AgentConfig) fetchString(ctx context.Context, endpoint string) (string, int, error) {