Fix IP issues in AlmaLinux (#381)

IP configuration kept getting overridden on Alma by cloud init, causing AzNHC to fail. This was working fine during build, but creating a new VM from the image would revert the configuration. Added config to the SKU Customization service to change it on boot.

alma/common/disable_cloudinit.sh

@@ -7,6 +7,5 @@ network: {config: disabled}
 EOF
 
 # Remove Hardware Mac Address and DHCP Name
-cp /etc/sysconfig/network-scripts/ifcfg-eth0 tempFile
-grep -v -E "HWADDR=|DHCP_HOSTNAME=" /etc/sysconfig/network-scripts/ifcfg-eth0 > tempFile
-mv tempFile /etc/sysconfig/network-scripts/ifcfg-eth0
+sed -i '/^HWADDR=.*$/d' /etc/sysconfig/network-scripts/ifcfg-eth0 
+sed -i '/^DHCP_HOSTNAME=.*$/d' /etc/sysconfig/network-scripts/ifcfg-eth0 

common/setup_sku_customizations.sh

@@ -14,6 +14,8 @@ if [ "$GPU" = "NVIDIA" ]; then
 cat <<EOF >/usr/sbin/setup_sku_customizations.sh
 #!/bin/bash
 
+/opt/azurehpc/customizations/alma_disable_cloudinit.sh
+
 metadata_endpoint="http://169.254.169.254/metadata/instance?api-version=2019-06-04"
 vmSize=\$(curl -H Metadata:true \$metadata_endpoint | jq -r ".compute.vmSize")
 

customizations/alma_disable_cloudinit.sh

@@ -0,0 +1,12 @@
+#!/bin/bash
+set -ex
+
+# TEMP add to fix changed behavior in AlmaLinux 8.7. 
+# Cloud init keeps reverting the changes /etc/sysconfig/network-scripts/ifcfg-eth0 even though it is disabled
+os=$(cat /etc/os-release | awk 'match($0, /^NAME="(.*)"/, result) { print result[1] }')
+if [[ $os == "AlmaLinux" ]]
+then
+    # Remove Hardware Mac Address and DHCP Name
+    sed -i '/^HWADDR=.*$/d' /etc/sysconfig/network-scripts/ifcfg-eth0 
+    sed -i '/^DHCP_HOSTNAME=.*$/d' /etc/sysconfig/network-scripts/ifcfg-eth0 
+fi

tests/test-definitions.sh

@@ -45,6 +45,10 @@ function verify_ib_device_status {
     # verify ifconfig
     ifconfig | grep "ib[[:digit:]]:\|ibP"
     check_exit_code "IB device is configured" "IB device not configured"
+
+    #verify hostname -i returns IP address only
+    hostname -i | grep -E "^([[:digit:]]{1,3}[\.]){3}[[:digit:]]{1,3}$"
+    check_exit_code "Hostname -i returns IP address" "Hostname -i does not return IP address"
 }
 
 function verify_hpcx_installation {