Remove 32-bit architectures from build scripts and support code

.ci/packaging.groovy

@@ -328,7 +328,6 @@ def linuxPlatforms() {
   return [
             '+all',
             'linux/amd64',
-            'linux/386',
             'linux/arm64',
             // armv7 packaging isn't working, and we don't currently
             // need it for release. Do not re-enable it without
@@ -341,7 +340,6 @@ def linuxPlatforms() {
             //'linux/mips64',
             //'linux/s390x',
             'windows/amd64',
-            'windows/386',
             'darwin/amd64',
             'darwin/arm64'
           ].join(' ')

Jenkinsfile

@@ -414,7 +414,6 @@ def packagingArm(Map args = [:]) {
 def packagingLinux(Map args = [:]) {
   def PLATFORMS = [ '+all',
                 'linux/amd64',
-                'linux/386',
                 'linux/arm64',
                 // armv7 packaging isn't working, and we don't currently
                 // need it for release. Do not re-enable it without
@@ -427,7 +426,6 @@ def packagingLinux(Map args = [:]) {
                 //'linux/mips64',
                 //'linux/s390x',
                 'windows/amd64',
-                'windows/386',
                 'darwin/amd64',
                 'darwin/arm64'
               ].join(' ')

dev-tools/mage/godaemon.go

@@ -71,8 +71,6 @@ func BuildGoDaemon() error {
 	switch Platform.Name {
 	case "linux/amd64":
 		compileCmd = append(compileCmd, "-m64")
-	case "linux/386":
-		compileCmd = append(compileCmd, "-m32")
 	}
 
 	defer DockerChown(output)

dev-tools/mage/pkg.go

@@ -362,7 +362,7 @@ func TestPackages(options ...TestPackagesOption) error {
 // glibc 2.17.
 func TestLinuxForCentosGLIBC() error {
 	switch Platform.Name {
-	case "linux/amd64", "linux/386":
+	case "linux/amd64":
 		return TestBinaryGLIBCVersion(filepath.Join("build/golang-crossbuild", BeatName+"-linux-"+Platform.GOARCH), "2.17")
 	default:
 		return nil

dev-tools/mage/pkgdeps.go

@@ -39,7 +39,6 @@ type PackageDependency struct {
 }
 
 var (
-	Linux386      = PlatformDescription{Name: "linux/386", Arch: "i386", DefaultTag: "i386"}
 	LinuxAMD64    = PlatformDescription{Name: "linux/amd64", Arch: "", DefaultTag: ""} // builders run on amd64 platform
 	LinuxARM64    = PlatformDescription{Name: "linux/arm64", Arch: "arm64", DefaultTag: "arm64"}
 	LinuxARM5     = PlatformDescription{Name: "linux/arm5", Arch: "armel", DefaultTag: "armel"}

dev-tools/mage/platforms.go

@@ -32,15 +32,15 @@ var BuildPlatforms = BuildPlatformList{
 	{"android/amd64", CGOSupported},
 	{"android/arm", CGOSupported},
 	{"android/arm64", CGOSupported},
-	{"darwin/386", CGOSupported | CrossBuildSupported},
+	{"darwin/386", 0},
 	{"darwin/amd64", CGOSupported | CrossBuildSupported | Default},
 	{"darwin/arm", CGOSupported},
 	{"darwin/arm64", CGOSupported | CrossBuildSupported | Default},
 	{"dragonfly/amd64", CGOSupported},
 	{"freebsd/386", CGOSupported},
 	{"freebsd/amd64", CGOSupported},
 	{"freebsd/arm", 0},
-	{"linux/386", CGOSupported | CrossBuildSupported | Default},
+	{"linux/386", 0},
 	{"linux/amd64", CGOSupported | CrossBuildSupported | Default},
 	{"linux/armv5", CGOSupported | CrossBuildSupported},
 	{"linux/armv6", CGOSupported | CrossBuildSupported},
@@ -66,7 +66,7 @@ var BuildPlatforms = BuildPlatformList{
 	{"plan9/amd64", 0},
 	{"plan9/arm", 0},
 	{"solaris/amd64", CGOSupported},
-	{"windows/386", CGOSupported | CrossBuildSupported | Default},
+	{"windows/386", 0},
 	{"windows/amd64", CGOSupported | CrossBuildSupported | Default},
 }
 

docs/devguide/contributing.asciidoc

@@ -143,9 +143,8 @@ sudo apt-get install python3-venv
 Beats is built using the `make release` target. By default, make will select from a limited number of preset build targets:
 
 - darwin/amd64
-- linux/386
+- darwin/arm64
 - linux/amd64
-- windows/386
 - windows/amd64
 
 You can change build targets using the `PLATFORMS` environment variable. Targets set with the `PLATFORMS` variable can either be a GOOS value, or a GOOS/arch pair.

libbeat/scripts/Makefile

@@ -87,7 +87,7 @@ SYSTEM_TESTS?=false ## @testing if true, "make test" and "make testsuite" run un
 STRESS_TESTS?=false ## @testing if true, "make test" and "make testsuite" run also run the stress tests
 STRESS_TEST_OPTIONS?=-timeout=20m -race -v
 GOX_OS?=linux darwin windows freebsd netbsd openbsd ## @Building List of all OS to be supported by "make crosscompile".
-GOX_OSARCH?=!darwin/arm !darwin/arm64 !darwin/386 ## @building Space separated list of GOOS/GOARCH pairs to build by "make crosscompile".
+GOX_OSARCH?=!darwin/arm !darwin/arm64 ## @building Space separated list of GOOS/GOARCH pairs to build by "make crosscompile".
 GOX_FLAGS?= ## @building Additional flags to append to the gox command used by "make crosscompile".
 # XXX: Should be switched back to `snapshot` once the Elasticsearch
 # snapshots are working. https://github.com/elastic/beats/pull/6416

packetbeat/scripts/mage/build.go

@@ -18,8 +18,6 @@
 package mage
 
 import (
-	"strings"
-
 	devtools "github.com/elastic/beats/v7/dev-tools/mage"
 )
 
@@ -35,11 +33,6 @@ func CrossBuild() error {
 			if err != nil {
 				return "", err
 			}
-			if platform == "linux/386" {
-				// Use Debian 9 because the linux/386 build needs an older glibc
-				// to remain compatible with CentOS 7 (glibc 2.17).
-				image = strings.ReplaceAll(image, "main-debian10", "main-debian9")
-			}
 			return image, nil
 		}),
 	)

packetbeat/scripts/mage/pcap.go

@@ -54,7 +54,6 @@ const (
 )
 
 var libpcapLDFLAGS = map[string]string{
-	"linux/386":      "-L/libpcap/libpcap-1.8.1-i386 -lpcap",
 	"linux/amd64":    "-L/libpcap/libpcap-1.8.1-amd64 -lpcap",
 	"linux/arm64":    linuxPcapLDFLAGS,
 	"linux/armv5":    linuxPcapLDFLAGS,
@@ -68,11 +67,9 @@ var libpcapLDFLAGS = map[string]string{
 	"linux/s390x":    linuxPcapLDFLAGS,
 	"darwin/amd64":   "-lpcap",
 	"windows/amd64":  "-L /libpcap/win/WpdPack/Lib/x64 -lwpcap",
-	"windows/386":    "-L /libpcap/win/WpdPack/Lib -lwpcap",
 }
 
 var libpcapCFLAGS = map[string]string{
-	"linux/386":      linuxPcapCFLAGS,
 	"linux/amd64":    linuxPcapCFLAGS,
 	"linux/arm64":    linuxPcapCFLAGS,
 	"linux/armv5":    linuxPcapCFLAGS,
@@ -85,5 +82,4 @@ var libpcapCFLAGS = map[string]string{
 	"linux/ppc64le":  linuxPcapCFLAGS,
 	"linux/s390x":    linuxPcapCFLAGS,
 	"windows/amd64":  "-I /libpcap/win/WpdPack/Include",
-	"windows/386":    "-I /libpcap/win/WpdPack/Include",
 }

x-pack/packetbeat/magefile.go

@@ -98,15 +98,10 @@ func CrossBuild() error {
 			if err != nil {
 				return "", err
 			}
-			if platform == "linux/386" {
-				// Use Debian 9 because the linux/386 build needs an older glibc
-				// to remain compatible with CentOS 7 (glibc 2.17).
-				image = strings.ReplaceAll(image, "main-debian10", "main-debian9")
-			}
 			if os.Getenv("CI") != "true" && os.Getenv("NPCAP_LOCAL") != "true" {
 				return image, nil
 			}
-			if platform == "windows/amd64" || platform == "windows/386" {
+			if platform == "windows/amd64" {
 				image = strings.ReplaceAll(image, "beats-dev", "observability-ci") // Temporarily work around naming of npcap image.
 				image = strings.ReplaceAll(image, "main", "npcap-"+NpcapVersion+"-debian9")
 			}