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====== Unattended Installation of Ubuntu Server 18.04 via PXE ======

===== Preface =====
<code bash>
export P=/ubuntu/18.04
export TFTPROOT=/var/lib/tftp
export WEBROOT=/var/lib/www/html
export HTTP_URL=http://192.168.1.1
</code>

===== Directory Structure =====
<code bash>
mkdir -p $TFTPROOT/$P
mkdir -p $WEBROOT/$P
</code>
===== Obtain necessary files =====
<code bash>
export URL=http://archive.ubuntu.com/ubuntu/dists/bionic-updates/main/installer-amd64/current/images/netboot/ubuntu-installer/amd64
wget -O $TFTPROOT/$P/initrd.gz $URL/initrd.gz
wget -O $TFTPROOT/$P/linux $URL/linux
</code>
===== Create pxelinux.cfg stanza =====
<code bash>
cat << EOF >> $TFTPROOT/pxelinux.cfg/default

LABEL ubuntu18.04
  MENU LABEL Ubuntu 18.04 Installation x64
  KERNEL $P/linux
  IPAPPEND 1
  APPEND initrd=$P/initrd.gz ksdevice=eth0 locale=en_US.UTF-8 keyboard-configuration/layoutcode=de interface=eth0 hostname=ubuntu18 url=$HTTP_URL/$P/preseed.cfg
EOF

</code>
===== Create sources.list =====
Because of the PXE installation, sources.list in the installed system is empty - thus a usable sources.list is downloaded in the final stage of the installation - see below.
<code bash>
cat << EOF > $WEBROOT/$P/sources.list
###### Ubuntu Main Repos
deb http://at.archive.ubuntu.com/ubuntu/ bionic main restricted universe multiverse 

###### Ubuntu Update Repos
deb http://at.archive.ubuntu.com/ubuntu/ bionic-security main restricted universe multiverse 
deb http://at.archive.ubuntu.com/ubuntu/ bionic-updates main restricted universe multiverse 
EOF
</code>
===== Create preseed.cfg =====
<code bash>
cat << EOF > $WEBROOT/$P/preseed.cfg
d-i debian-installer/locale string en_US
d-i console-setup/ask_detect boolean false
d-i keyboard-configuration/layoutcode string de
d-i netcfg/choose_interface select eth0
d-i netcfg/get_hostname string ubuntu18
d-i netcfg/get_domain string test.local
d-i netcfg/wireless_wep string
d-i mirror/country string manual
d-i mirror/http/hostname string at.archive.ubuntu.com
d-i mirror/http/directory string /ubuntu
d-i mirror/http/proxy string
d-i clock-setup/utc boolean true
d-i time/zone string EU/Vienna
d-i clock-setup/ntp boolean true
d-i clock-setup/ntp-server string at.pool.ntp.org
d-i partman-auto/disk string /dev/sda
d-i partman-auto/method string lvm
d-i partman-lvm/device_remove_lvm boolean true
d-i partman-lvm/device_remove_lvm_span boolean true
d-i partman-auto/purge_lvm_from_device boolean true
d-i partman-lvm/confirm boolean true
d-i partman-lvm/confirm_nooverwrite boolean true
d-i partman-auto-lvm/new_vg_name string vg00
d-i partman-auto/expert_recipe string \\
    standard ::                       \\
      1024 1026 1024 ext3             \\
        $primary{ }                   \\
        $bootable{ }                  \\
        method{ format }              \\
        format{ }                     \\
        use_filesystem{ }             \\
        filesystem{ ext3 }            \\
        mountpoint{ /boot }           \\
      .                               \\
      24576 60000 -1 ext4             \\
        $lvmok{ }                     \\
        method{ format }              \\
        format{ }                     \\
        use_filesystem{ }             \\
        filesystem{ ext4 }            \\
        mountpoint{ / }               \\
        lv_name{ lvRoot }             \\
      .                               \\
      2048 2049 300% linux-swap       \\
        $lvmok{ }                     \\
        method{ swap }                \\
        format{ }                     \\
        lv_name{ lvSwap }             \\
      .
d-i partman-auto/choose_recipe standard
d-i partman-auto-lvm/guided_size string max
d-i partman-partitioning/confirm_write_new_label boolean true
d-i partman/choose_partition select finish
d-i partman/confirm boolean true
d-i partman/confirm_nooverwrite boolean true
d-i partman-auto/confirm boolean true
#d-i passwd/root-login boolean false
#d-i passwd/make-user boolean false
#d-i passwd/root-password password r00tme
#d-i passwd/root-password-again password r00tme
d-i passwd/user-fullname string Ubuntu
d-i passwd/username string ubuntu
d-i passwd/user-password password ChangeMe!
d-i passwd/user-password-again password ChangeMe!
d-i user-setup/allow-password-weak boolean true
d-i user-setup/encrypt-home boolean false
d-i pkgsel/include string openssh-server update-motd
tasksel tasksel/first multiselect server, openssh-server
d-i pkgsel/update-policy select none
d-i grub-installer/only_debian boolean true
d-i grub-installer/with_other_os boolean true
d-i preseed/late_command string \\
wget $HTTP_URL/$P/sources.list -O /target/etc/apt/sources.list
d-i finish-install/reboot_in_progress note
EOF
</code>

Regarding Partman Priority Voodo read [[https://www.bishnet.net/tim/blog/2015/01/29/understanding-partman-autoexpert_recipe/]]
{{tag>kb linux pxe ubuntu}}