Refactoring: move all http.Transport configuration parameter parsing into one place

[GiedriusS]

These are all functions/structs for configuring the same thing:

thanos/pkg/objstore/azure/helpers.go

Line 121 in 5bda2d4

func DefaultTransport(config Config) *http.Transport {

thanos/pkg/objstore/cos/cos.go

Line 95 in 46ac4d5

func DefaultTransport(c HTTPConfig) *http.Transport {

thanos/pkg/objstore/s3/s3.go

Line 124 in bf96323

func DefaultTransport(config Config) *http.Transport {

Another place being added: #4623

Move them into one struct. This probably belongs in exthttp.

[heysujal]

@GiedriusS I would like to fix this issue. Please guide me how can I get started , I am new to this project.

[GiedriusS]

All of these functions and structs can be joined into one and we can use them everywhere consistently. Please let me know if you have any specific questions.

[4molybdenum2]

So will replacing the NewTransport() function in exhttp with something like this help?

func NewTransport(config HTTPConfig) *http.Transport {
	return &http.Transport{
		Proxy: http.ProxyFromEnvironment,
		DialContext: (&net.Dialer{
			Timeout:   30 * time.Second,
			KeepAlive: 30 * time.Second,
			DualStack: true,
		}).DialContext,

		MaxIdleConns:          config.MaxIdleConns,
		MaxIdleConnsPerHost:   config.MaxIdleConnsPerHost,
		IdleConnTimeout:       time.Duration(config.IdleConnTimeout),
		MaxConnsPerHost:       config.MaxConnsPerHost,
		TLSHandshakeTimeout:   time.Duration(config.TLSHandshakeTimeout),
		ExpectContinueTimeout: time.Duration(config.ExpectContinueTimeout),
		ResponseHeaderTimeout: time.Duration(config.ResponseHeaderTimeout),
		DisableCompression:	config.DisableCompression,
		TLSClientConfig:	&tls.Config{InsecureSkipVerify: config.InsecureSkipVerify},
	}
}

[Namanl2001]

So will replacing the NewTransport() function in exhttp with something like this help?

@4molybdenum2 I think replacing NewTransport() would not be helpful as it serves a different purpose, rather you can try creating a new func DefaultTransport() in exhttp, may be with the same return values as you proposed above, in the comment :)

[4molybdenum2]

Ok, will check this out, maybe make a PR...

[stale]

Hello 👋 Looks like there was no activity on this issue for the last two months.
Do you mind updating us on the status? Is this still reproducible or needed? If yes, just comment on this PR or push a commit. Thanks! 🤗
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[bwplotka]

AC:

• There is only single HTTPConfig struct that can be unmarshalled from YAML in the consistent way.
• There is only single reused helper for creating Transport from this HTTPConfig
• We don't break Cortex deps

[SrushtiSapkale]

I am working on this issue🙌

[NishantBansal2003]

Hey @saswatamcode,This issue can be closed with reference to the above merged PR.