MINOR: global: add fd-hard-limit

Author: mjuraga

config-parser/section-parsers.go

@@ -243,6 +243,7 @@ func (p *configParser) getGlobalParser() *Parsers { //nolint: maintidx
 	addParser(parser, &sequence, &simple.Number{Name: "maxsslconn"})
 	addParser(parser, &sequence, &simple.Number{Name: "maxsslrate"})
 	addParser(parser, &sequence, &simple.Number{Name: "maxzlibmem"})
+	addParser(parser, &sequence, &simple.Number{Name: "fd-hard-limit"})
 	addParser(parser, &sequence, &simple.String{Name: "pidfile"})
 	addParser(parser, &sequence, &parsers.Socket{})
 	addParser(parser, &sequence, &parsers.StatsTimeout{})

configuration/configuration_test.go

@@ -135,6 +135,7 @@ global
   maxsslconn 7
   maxsslrate 8
   maxzlibmem 9
+  fd-hard-limit 4096
   no-quic
   noepoll
   nokqueue

configuration/global.go

@@ -824,6 +824,11 @@ func ParseGlobalSection(p parser.Parser) (*models.Global, error) { //nolint:goco
 		maxzlibmem = maxzlibmemParser.Value
 	}
 
+	fdHardLimit, err := parseInt64POption(p, "fd-hard-limit")
+	if err != nil {
+		return nil, err
+	}
+
 	var noQuic bool
 	_, err = p.Get(parser.Global, parser.GlobalSectionName, "no-quic")
 	if !errors.Is(err, parser_errors.ErrFetch) {
@@ -1229,6 +1234,7 @@ func ParseGlobalSection(p parser.Parser) (*models.Global, error) { //nolint:goco
 		Maxsslconn:                             maxsslconn,
 		Maxsslrate:                             maxsslrate,
 		Maxzlibmem:                             maxzlibmem,
+		FdHardLimit:                            fdHardLimit,
 		NoQuic:                                 noQuic,
 		Noepoll:                                noepoll,
 		Nokqueue:                               nokqueue,
@@ -1855,6 +1861,10 @@ func SerializeGlobalSection(p parser.Parser, data *models.Global) error { //noli
 		return err
 	}
 
+	if err := serializeInt64POption(p, "fd-hard-limit", data.FdHardLimit); err != nil {
+		return err
+	}
+
 	noQuic := &types.Enabled{}
 	if !data.NoQuic {
 		noQuic = nil

models/global.go

@@ -1122,6 +1122,9 @@ definitions:
           external_check:
               type: boolean
               x-display-name: External Check
+          fd_hard_limit:
+              type: integer
+              x-nullable: true
           fifty_one_degrees_options:
               properties:
                   cache_size:

models/global_compare.go

@@ -144,6 +144,9 @@ global:
     maxzlibmem:
       type: integer
       x-display-name: Maximum amount of RAM in megabytes per process usable by the zlib
+    fd_hard_limit:
+      type: integer
+      x-nullable: true
     no-quic:
       type: boolean
       x-display-name: Disable the use of the QUIC protocol