mirror of
https://github.com/leitbogioro/Tools.git
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49 lines
2.3 KiB
Bash
49 lines
2.3 KiB
Bash
#!/bin/bash
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#
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# Installing necessary components:
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apt update -y
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apt install axel cron kpartx mount qemu-utils xfsprogs xz-utils -y
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# get valid loop device
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loopDevice=$(echo $(losetup -f))
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loopDeviceNum=$(echo $(losetup -f) | cut -d'/' -f 3)
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linuxName="AlmaLinux"
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websiteDir="/www/wwwroot/cloud-images.a.disk.re/$linuxName"
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[[ ! -d "$websiteDir" ]] && mkdir -p "$websiteDir"
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for distNum in "9"; do
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for archType in "x86_64" "aarch64"; do
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fileName="$linuxName-$distNum-GenericCloud-latest.$archType"
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# Replace "wget" to "axel" because axel supports multithreading and improve speed of downloading.
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axel -n 16 -k -q -o /root/$fileName.qcow2 "https://repo.almalinux.org/almalinux/$distNum/cloud/$archType/images/$fileName.qcow2"
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qemu-img convert -f qcow2 -O raw /root/$fileName.qcow2 /root/$fileName.raw
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losetup $loopDevice /root/$fileName.raw
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# Add some parameters for kernel aims to "redirect name of network adapters", "disable kdump", "disable selinux".
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grub2DirDevice=$(kpartx -av $loopDevice | grep "$loopDeviceNum" | sort -rn | sed -n '2p' | awk '{print $3}')
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sysDirDevice=$(kpartx -av $loopDevice | grep "$loopDeviceNum" | sort -rn | sed -n '1p' | awk '{print $3}')
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mount /dev/mapper/$grub2DirDevice /mnt
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sed -ri 's/biosdevname=0.*/net.ifnames=0 biosdevname=0 crashkernel=0 selinux=0 "/g' /mnt/grub2/grub.cfg
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umount /mnt
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mount /dev/mapper/$sysDirDevice /mnt
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sed -ri 's/biosdevname=0.*/net.ifnames=0 biosdevname=0 crashkernel=0 selinux=0"/g' /mnt/etc/default/grub
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umount /mnt
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kpartx -dv $loopDevice
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losetup -d $loopDevice
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# Transfer file format from ".raw" to ".xz" because xz can skip sparse files of cloud images and has a very light size aims to reduce I/O of network expenses.
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xz -z -1 -T 0 /root/$fileName.raw
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mv /root/$fileName.raw.xz /root/$fileName.xz
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rm -rf $websiteDir/$fileName.xz
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mv /root/$fileName.xz $websiteDir/$fileName.xz
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rm -rf /root/$fileName.raw
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rm -rf /root/$fileName.qcow2
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done
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done
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# write crontab task
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# Crontab simulator: https://crontab.guru/
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# Schedule cronjob for the certain day in a week: https://blog.healthchecks.io/2022/09/schedule-cron-job-the-funky-way/
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if [[ ! $(grep -i "autorepackalmalinuxcloudimages" /etc/crontab) ]]; then
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sed -i '$i 0 7 */100,1-7 * SUN root bash /root/autoRepackAlmaLinuxCloudImages.sh' /etc/crontab
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crontab -l
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/etc/init.d/cron reload
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/etc/init.d/cron restart
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fi
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