Fix: Prevent Ubuntu autoinstall from hanging and enable proper apt repos

- Disable security/updates repos during installation to prevent unattended-upgrades from running
- Configure APT to disable automatic updates during installation
- Add DEBIAN_FRONTEND=noninteractive for 22.04 to prevent kexec-tools prompts
- Recreate proper apt sources in runcmd with all repos enabled (main, updates, security, backports)
- Use generic archive.ubuntu.com mirror for global users
- Fixes installation hangs and package dependency issues in Ubuntu golden images

Author: Muthukumar-Subramaniam

ks-manage/ks-templates/ubuntu-lts-latest-ks/user-data

@@ -5,6 +5,9 @@ autoinstall:
 
   apt:
     disable_suites: [security, updates]
+    conf: |
+      APT::Periodic::Enable "0";
+      Unattended-Upgrade::Automatic-Reboot "false";
 
   early-commands:
     - echo "ttyS0" >> /etc/securetty
@@ -25,6 +28,18 @@ autoinstall:
       list:
         - root:get_shadow_password_super_mgmt_user
     runcmd:
+      - "echo 'Types: deb' > /etc/apt/sources.list.d/ubuntu.sources"
+      - "echo 'URIs: http://archive.ubuntu.com/ubuntu/' >> /etc/apt/sources.list.d/ubuntu.sources"
+      - "echo 'Suites: noble noble-updates noble-backports' >> /etc/apt/sources.list.d/ubuntu.sources"
+      - "echo 'Components: main restricted universe multiverse' >> /etc/apt/sources.list.d/ubuntu.sources"
+      - "echo 'Signed-By: /usr/share/keyrings/ubuntu-archive-keyring.gpg' >> /etc/apt/sources.list.d/ubuntu.sources"
+      - "echo '' >> /etc/apt/sources.list.d/ubuntu.sources"
+      - "echo 'Types: deb' >> /etc/apt/sources.list.d/ubuntu.sources"
+      - "echo 'URIs: http://security.ubuntu.com/ubuntu/' >> /etc/apt/sources.list.d/ubuntu.sources"
+      - "echo 'Suites: noble-security' >> /etc/apt/sources.list.d/ubuntu.sources"
+      - "echo 'Components: main restricted universe multiverse' >> /etc/apt/sources.list.d/ubuntu.sources"
+      - "echo 'Signed-By: /usr/share/keyrings/ubuntu-archive-keyring.gpg' >> /etc/apt/sources.list.d/ubuntu.sources"
+      - apt-get update
       - apt-get install -y kexec-tools chrony vim less bash-completion nfs-common tmux net-tools sysstat zip tcpdump traceroute wget tar inetutils-ping dnsutils rsync netcat-openbsd nmap lsof autofs
       - apt-get remove -y lvm2 && apt-get autoremove -y 
       - /usr/bin/echo -e "HISTSIZE=-1\nHISTFILESIZE=-1" | tee -a /home/get_mgmt_super_user/.bashrc /root/.bashrc

ks-manage/ks-templates/ubuntu-lts-previous-ks/user-data

@@ -5,6 +5,9 @@ autoinstall:
 
   apt:
     disable_suites: [security, updates]
+    conf: |
+      APT::Periodic::Enable "0";
+      Unattended-Upgrade::Automatic-Reboot "false";
 
   early-commands:
     - echo "ttyS0" >> /etc/securetty
@@ -25,7 +28,18 @@ autoinstall:
       list:
         - root:get_shadow_password_super_mgmt_user
     runcmd:
-      - apt-get install -y kexec-tools chrony vim less bash-completion nfs-common tmux net-tools sysstat zip tcpdump traceroute wget tar inetutils-ping dnsutils rsync netcat-openbsd nmap lsof autofs
+      - echo 'deb http://archive.ubuntu.com/ubuntu/ jammy main restricted' > /etc/apt/sources.list
+      - echo 'deb http://archive.ubuntu.com/ubuntu/ jammy-updates main restricted' >> /etc/apt/sources.list
+      - echo 'deb http://archive.ubuntu.com/ubuntu/ jammy universe' >> /etc/apt/sources.list
+      - echo 'deb http://archive.ubuntu.com/ubuntu/ jammy-updates universe' >> /etc/apt/sources.list
+      - echo 'deb http://archive.ubuntu.com/ubuntu/ jammy multiverse' >> /etc/apt/sources.list
+      - echo 'deb http://archive.ubuntu.com/ubuntu/ jammy-updates multiverse' >> /etc/apt/sources.list
+      - echo 'deb http://archive.ubuntu.com/ubuntu/ jammy-backports main restricted universe multiverse' >> /etc/apt/sources.list
+      - echo 'deb http://security.ubuntu.com/ubuntu/ jammy-security main restricted' >> /etc/apt/sources.list
+      - echo 'deb http://security.ubuntu.com/ubuntu/ jammy-security universe' >> /etc/apt/sources.list
+      - echo 'deb http://security.ubuntu.com/ubuntu/ jammy-security multiverse' >> /etc/apt/sources.list
+      - apt-get update
+      - DEBIAN_FRONTEND=noninteractive apt-get install -y kexec-tools chrony vim less bash-completion nfs-common tmux net-tools sysstat zip tcpdump traceroute wget tar inetutils-ping dnsutils rsync netcat-openbsd nmap lsof autofs
       - apt-get remove -y lvm2 && apt-get autoremove -y 
       - /usr/bin/echo -e "HISTSIZE=-1\nHISTFILESIZE=-1" | tee -a /home/get_mgmt_super_user/.bashrc /root/.bashrc
       - var_PS1_variable_get_mgmt_super_user=$(curl -s -L http://get_web_server_name.get_ipv4_domain/ksmanager-hub/addons-for-kickstarts/PS1-env-variable-normal-user)