Merge pull request openshift#7276 from pawanpinjarkar/decompress-kernel-new

AGENT-627: Decompress kernel on ARM

Author: openshift-merge-robot

cmd/openshift-install/testdata/agent/pxe/configurations/sno-arm.txt

@@ -0,0 +1,55 @@
+# Verify a default configuration for the SNO topology for ARM architecture
+
+exec openshift-install agent create pxe-files --dir $WORK
+
+stderr 'Created iPXE script agent.aarch64.ipxe'
+
+exists $WORK/pxe/agent.aarch64-initrd.img
+exists $WORK/pxe/agent.aarch64-rootfs.img
+exists $WORK/pxe/agent.aarch64-vmlinuz
+exists $WORK/auth/kubeconfig
+exists $WORK/auth/kubeadmin-password
+
+cmp $WORK/pxe/agent.aarch64.ipxe $WORK/expected/agent.aarch64.ipxe
+
+-- install-config.yaml --
+apiVersion: v1
+baseDomain: test.metalkube.org
+controlPlane: 
+  name: master
+  replicas: 1
+  architecture: arm64
+compute: 
+- name: worker
+  replicas: 0
+  architecture: arm64
+metadata:
+  namespace: cluster0
+  name: ostest
+networking:
+  clusterNetwork:
+  - cidr: 10.128.0.0/14 
+    hostPrefix: 23 
+  networkType: OVNKubernetes
+  machineNetwork:
+  - cidr: 192.168.111.0/24
+  serviceNetwork: 
+  - 172.30.0.0/16
+platform:
+  none: {}
+sshKey: ssh-rsa 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
+pullSecret: '{"auths": {"quay.io": {"auth": "c3VwZXItc2VjcmV0Cg=="}}}'
+
+-- agent-config.yaml --
+apiVersion: v1alpha1
+metadata:
+  name: ostest
+  namespace: cluster0
+rendezvousIP: 192.168.111.20
+ipxeBaseURL: http://user-specified-pxe-infra.com
+
+-- expected/agent.aarch64.ipxe --
+#!ipxe
+initrd --name initrd http://user-specified-pxe-infra.com/agent.aarch64-initrd.img
+kernel http://user-specified-pxe-infra.com/agent.aarch64-vmlinuz initrd=initrd coreos.live.rootfs_url=http://user-specified-pxe-infra.com/agent.aarch64-rootfs.img ignition.firstboot ignition.platform.id=metal
+boot

pkg/asset/agent/image/agentpxefiles.go

@@ -1,6 +1,7 @@
 package image
 
 import (
+	"compress/gzip"
 	"encoding/json"
 	"errors"
 	"fmt"
@@ -9,11 +10,13 @@ import (
 	"path/filepath"
 	"strings"
 
+	"github.com/coreos/stream-metadata-go/arch"
 	"github.com/sirupsen/logrus"
 
 	"github.com/openshift/assisted-image-service/pkg/isoeditor"
 	"github.com/openshift/installer/pkg/asset"
 	config "github.com/openshift/installer/pkg/asset/agent/agentconfig"
+	"github.com/openshift/installer/pkg/types"
 )
 
 const (
@@ -120,9 +123,22 @@ func (a *AgentPXEFiles) PersistToFile(directory string) error {
 		return err
 	}
 	defer kernelReader.Close()
-	err = a.copy(agentVmlinuzFile, kernelReader)
-	if err != nil {
-		return err
+
+	if a.cpuArch == arch.RpmArch(types.ArchitectureARM64) {
+		gzipReader, err := gzip.NewReader(kernelReader)
+		if err != nil {
+			panic(err)
+		}
+		defer gzipReader.Close()
+		err = a.copy(agentVmlinuzFile, gzipReader)
+		if err != nil {
+			return err
+		}
+	} else {
+		err = a.copy(agentVmlinuzFile, kernelReader)
+		if err != nil {
+			return err
+		}
 	}
 
 	if a.ipxeBaseURL != "" {