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Pull request: AG-28771 conf upstream mode

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Squashed commit of the following:

commit afb5a0d8a499bccf7761baea40910f39c92b8a20
Merge: 09ac43c85 abf20c6de
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Mon Dec 25 12:55:45 2023 +0200

    Merge remote-tracking branch 'origin/master' into conf-ups-mode

commit 09ac43c859ef8cbd3bb0488d1a945589cd59ca19
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Fri Dec 22 14:36:07 2023 +0200

    openapi: imp docs

commit d0fbd4349e4bddde73c6e92f75854acfc481ac0d
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Fri Dec 22 11:47:10 2023 +0200

    all: changelog

commit 105f9c50738733b0736a768fb9ee09d2e7fbf42e
Merge: 62a2cf12d 4bc5c346a
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Fri Dec 22 11:27:21 2023 +0200

    Merge remote-tracking branch 'origin/master' into conf-ups-mode

    # Conflicts:
    #	openapi/CHANGELOG.md

commit 62a2cf12df694611888e840a5041a9c517cdfddb
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Fri Dec 22 10:52:59 2023 +0200

    openapi: imp docs

commit 87956c49240da44b216489920feff69996e3502b
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Thu Dec 21 12:08:07 2023 +0200

    dnsforward: imp code

commit bf74d67ad112735d557be3d8fac75964cd99e375
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Wed Dec 20 15:46:38 2023 +0200

    dnsforward: imp code

commit 3a98dee88809a25118a14a1f07eeecbfccb14cd9
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Wed Dec 20 15:41:06 2023 +0200

    dnsforward: imp code

commit 1499da1fa0319ac3ad914171e807446f2c4d2fdb
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Wed Dec 20 13:36:28 2023 +0200

    dnsforward: imp code

commit 228c61a5a0f73cc13655cef8bdaa1995b3f7fced
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Wed Dec 20 13:06:11 2023 +0200

    dnsforward: imp code

commit 069ee22c6d904db4e983135ce87a9fe8d12b7e9a
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Tue Dec 19 12:39:25 2023 +0200

    dnsforward: imp code

commit 90919f99a975862dcb07ac82fb740e4404e48bae
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Tue Dec 19 12:10:43 2023 +0200

    confmigrate: fix

commit a8c329950423b59098d1f2b16d1da7100dd54f8d
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Tue Dec 19 12:08:05 2023 +0200

    dnsforward: imp code

commit 58b53ccd97d353fab0df29f13425b5e341c8fdeb
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Mon Dec 18 15:10:01 2023 +0200

    all: conf upstream mode
This commit is contained in:
Dimitry Kolyshev
2023-12-25 14:16:48 +03:00
parent abf20c6dea
commit 1511fabeec
19 changed files with 297 additions and 51 deletions
Download Patch File Download Diff File Expand all files Collapse all files

73
internal/dnsforward/http.go
View File

@@ -70,7 +70,7 @@ type jsonDNSConfig struct {
DisableIPv6 *bool `json:"disable_ipv6"`
// UpstreamMode defines the way DNS requests are constructed.
UpstreamMode *string `json:"upstream_mode"`
UpstreamMode *jsonUpstreamMode `json:"upstream_mode"`
// BlockedResponseTTL is the TTL for blocked responses.
BlockedResponseTTL *uint32 `json:"blocked_response_ttl"`
@@ -114,6 +114,21 @@ type jsonDNSConfig struct {
DefaultLocalPTRUpstreams []string `json:"default_local_ptr_upstreams,omitempty"`
}
// jsonUpstreamMode is a enumeration of upstream modes.
type jsonUpstreamMode string
const (
// jsonUpstreamModeEmpty is the default value on frontend, it is used as
// jsonUpstreamModeLoadBalance mode.
//
// Deprecated: Use jsonUpstreamModeLoadBalance instead.
jsonUpstreamModeEmpty jsonUpstreamMode = ""
jsonUpstreamModeLoadBalance jsonUpstreamMode = "load_balance"
jsonUpstreamModeParallel jsonUpstreamMode = "parallel"
jsonUpstreamModeFastestAddr jsonUpstreamMode = "fastest_addr"
)
func (s *Server) getDNSConfig() (c *jsonDNSConfig) {
protectionEnabled, protectionDisabledUntil := s.UpdatedProtectionStatus()
@@ -145,11 +160,16 @@ func (s *Server) getDNSConfig() (c *jsonDNSConfig) {
usePrivateRDNS := s.conf.UsePrivateRDNS
localPTRUpstreams := stringutil.CloneSliceOrEmpty(s.conf.LocalPTRResolvers)
var upstreamMode string
if s.conf.FastestAddr {
upstreamMode = "fastest_addr"
} else if s.conf.AllServers {
upstreamMode = "parallel"
var upstreamMode jsonUpstreamMode
switch s.conf.UpstreamMode {
case UpstreamModeLoadBalance:
// TODO(d.kolyshev): Support jsonUpstreamModeLoadBalance on frontend instead
// of jsonUpstreamModeEmpty.
upstreamMode = jsonUpstreamModeEmpty
case UpstreamModeParallel:
upstreamMode = jsonUpstreamModeParallel
case UpstreamModeFastestAddr:
upstreamMode = jsonUpstreamModeFastestAddr
}
defPTRUps, err := s.defaultLocalPTRUpstreams()
@@ -222,18 +242,22 @@ func (req *jsonDNSConfig) checkBlockingMode() (err error) {
return validateBlockingMode(*req.BlockingMode, req.BlockingIPv4, req.BlockingIPv6)
}
// checkUpstreamsMode returns an error if the upstream mode is invalid.
func (req *jsonDNSConfig) checkUpstreamsMode() (err error) {
// checkUpstreamMode returns an error if the upstream mode is invalid.
func (req *jsonDNSConfig) checkUpstreamMode() (err error) {
if req.UpstreamMode == nil {
return nil
}
mode := *req.UpstreamMode
if ok := slices.Contains([]string{"", "fastest_addr", "parallel"}, mode); !ok {
return fmt.Errorf("upstream_mode: incorrect value %q", mode)
switch um := *req.UpstreamMode; um {
case
jsonUpstreamModeEmpty,
jsonUpstreamModeLoadBalance,
jsonUpstreamModeParallel,
jsonUpstreamModeFastestAddr:
return nil
default:
return fmt.Errorf("upstream_mode: incorrect value %q", um)
}
return nil
}
// checkBootstrap returns an error if any bootstrap address is invalid.
@@ -297,7 +321,7 @@ func (req *jsonDNSConfig) validate(privateNets netutil.SubnetSet) (err error) {
return err
}
err = req.checkUpstreamsMode()
err = req.checkUpstreamMode()
if err != nil {
// Don't wrap the error since it's informative enough as is.
return err
@@ -446,8 +470,9 @@ func (s *Server) setConfig(dc *jsonDNSConfig) (shouldRestart bool) {
}
if dc.UpstreamMode != nil {
s.conf.AllServers = *dc.UpstreamMode == "parallel"
s.conf.FastestAddr = *dc.UpstreamMode == "fastest_addr"
s.conf.UpstreamMode = mustParseUpstreamMode(*dc.UpstreamMode)
} else {
s.conf.UpstreamMode = UpstreamModeLoadBalance
}
if dc.EDNSCSUseCustom != nil && *dc.EDNSCSUseCustom {
@@ -460,6 +485,22 @@ func (s *Server) setConfig(dc *jsonDNSConfig) (shouldRestart bool) {
return s.setConfigRestartable(dc)
}
// mustParseUpstreamMode returns an upstream mode parsed from jsonUpstreamMode.
// Panics in case of invalid value.
func mustParseUpstreamMode(mode jsonUpstreamMode) (um UpstreamMode) {
switch mode {
case jsonUpstreamModeEmpty, jsonUpstreamModeLoadBalance:
return UpstreamModeLoadBalance
case jsonUpstreamModeParallel:
return UpstreamModeParallel
case jsonUpstreamModeFastestAddr:
return UpstreamModeFastestAddr
default:
// Should never happen, since the value should be validated.
panic(fmt.Errorf("unexpected upstream mode: %q", mode))
}
}
// setIfNotNil sets the value pointed at by currentPtr to the value pointed at
// by newPtr if newPtr is not nil. currentPtr must not be nil.
func setIfNotNil[T any](currentPtr, newPtr *T) (hasSet bool) {