Update autoRepackAlmaLinuxCloudImages.sh

Linux_reinstall/RedHat/AlmaLinux/autoRepackAlmaLinuxCloudImages.sh

@@ -1 +1,45 @@
+#!/bin/bash
+#
+# Installing necessary components:
+apt update -y
+apt install axel cron kpartx mount qemu-utils xfsprogs xz-utils -y
+# get valid loop device
+loopDevice=$(echo $(losetup -f))
+loopDeviceNum=$(echo $(losetup -f) | cut -d'/' -f 3)
+linuxName="AlmaLinux"
+websiteDir="/www/wwwroot/cloud-images.a.disk.re/$linuxName"
+[[ ! -d "$websiteDir" ]] && mkdir -p "$websiteDir"
 
+for distNum in "9"; do
+  for archType in "x86_64" "aarch64"; do
+    fileName="$linuxName-$distNum-GenericCloud-latest.$archType"
+# Replace "wget" to "axel" because axel supports multithreading and improve speed of downloading.
+    axel -n 16 -k -q -o /root/$fileName.qcow2 "https://repo.almalinux.org/almalinux/$distNum/cloud/$archType/images/$fileName.qcow2"
+    qemu-img convert -f qcow2 -O raw /root/$fileName.qcow2 /root/$fileName.raw
+    losetup $loopDevice /root/$fileName.raw
+# Add some parameters for kernel aims to "redirect name of network adapters", "disable kdump", "disable selinux".
+    grub2DirDevice=$(kpartx -av $loopDevice | grep "$loopDeviceNum" | sort -rn | sed -n '2p' | awk '{print $3}')
+    sysDirDevice=$(kpartx -av $loopDevice | grep "$loopDeviceNum" | sort -rn | sed -n '1p' | awk '{print $3}')
+    mount /dev/mapper/$grub2DirDevice /mnt
+    sed -ri 's/biosdevname=0.*/net.ifnames=0 biosdevname=0 crashkernel=0 selinux=0 "/g' /mnt/grub2/grub.cfg
+    umount /mnt
+    mount /dev/mapper/$sysDirDevice /mnt
+    sed -ri 's/biosdevname=0.*/net.ifnames=0 biosdevname=0 crashkernel=0 selinux=0"/g' /mnt/etc/default/grub
+    umount /mnt
+    kpartx -dv $loopDevice
+    losetup -d $loopDevice
+# Transfer file format from ".raw" to ".xz" because xz can skip sparse files of cloud images and has a very light size aims to reduce I/O of network expenses.
+    xz -z -1 -T 0 /root/$fileName.raw
+    mv /root/$fileName.raw.xz /root/$fileName.xz
+    rm -rf $websiteDir/$fileName.xz
+    mv /root/$fileName.xz $websiteDir/$fileName.xz
+    rm -rf /root/$fileName.raw
+    rm -rf /root/$fileName.qcow2
+  done
+done
+
+# write crontab task
+if [[ ! `grep -i "autorepackalmalinuxcloudimages" /etc/crontab` ]]; then
+  sed -i '$i 0 6 1-7 * 7   root    bash /root/autoRepackAlmaLinuxCloudImages.sh' /etc/crontab
+  /etc/init.d/cron restart
+fi