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--- fedora_coreos [2025/10/05 09:13] – herwarth
+++ fedora_coreos [2025/10/06 15:29] (current) – herwarth
@@ Line 4: / Line 4: @@
 =====Butane file=====
-Creating a butane file for automatic deployment because the installer of CoreOS is non-interactive
+Creating a butane file for automatic deployment because the installer of CoreOS is non-interactive.
+In this example I add a user core with a password hash (console access) and SSH-keys for authortized logins.
+I add a root CA certificate, set my router as NTP source for chrony install 3 additional packages: docker-compose,vim,qemu-guest-agent and make docker service enabled.
 <code - fcos.ign>
@@ Line 38: / Line 40: @@
           .
           -----END CERTIFICATE-----
-    # Set vim as default editor
-    # We use `zz-` as prefix to make sure this is processed last in order to
-    # override any previously set defaults.
-    - path: /etc/profile.d/zz-default-editor.sh
-      overwrite: true
-      contents:
-        inline: |
-          export EDITOR=vim
   links:
     - path: /etc/localtime
@@ Line 73: / Line 67: @@
         # added to the root image in a future Fedora CoreOS release as it will
         # prevent the service from failing.
-        ExecStart=/usr/bin/rpm-ostree install -y --allow-inactive docker-compose vim qemu-guest-agent
+        ExecStart=/usr/bin/rpm-ostree install -y --allow-inactive docker-compose qemu-guest-agent
         ExecStart=/bin/touch /var/lib/%N.stamp
         ExecStart=/bin/systemctl --no-block reboot
@@ Line 80: / Line 74: @@
         WantedBy=multi-user.target
 </code>
+=====Convert Butane to Ignition=====
+<code>
+podman run --interactive --rm quay.io/coreos/butane:release \
+       --pretty --strict < fcos.bu > fcos.ign
+</code>
+Upload the fcos.ign file to a webserver reachable by the installer
+=====Modify Fedora ISO to non-interactive install VM=====
+In this example I donwloaded fedora-coreos-42.20250914.3.0-live-iso.x86_64.iso from the Fedora website. It creates a custom.iso to upload to my Proxmox datastore.
+<code>
+podman run --security-opt label=disable --pull=always --rm -v .:/data -w /data quay.io/coreos/coreos-installer:release iso customize \
+    --live-karg-append "coreos.inst.install_dev=/dev/sda" \
+    --live-karg-append "coreos.inst.ignition_url=http://<URL-WEBSERVER>/fcos.ign" \
+    -o custom.iso \
+    fedora-coreos-42.20250914.3.0-live-iso.x86_64.iso
+</code>
+=====Create VM in Proxmox=====
+I create a VM in Proxmox with the following specifications:
+  * Linux 6.x - 2.6 Kernel
+  * ISO image: custom.iso (created above)
+  * Machine: q35
+  * BIOS: OVMF
+  * Select preferred datastore in EFI storage
+  * SCSI Controller: VirtIO SCSI single
+  * Check Qemu Agent
+  * Disk size 16 GB
+  * Cache: Default
+  * Select Discard
+  * Sockets: 1
+  * Cores: 2
+  * Type: x86-64-v2-AES
+  * Memory: 4096
+  * Bridge: vmbr0
+  * Model: VirtIO (paravirtualized)
+After that convert this VM to a template and when creating a VM make a full-clone of this template.
+=====Modify after boot=====
+The network is DHCP enabled in this example. The following steps remain:
+  * Manually confige network with nmcli/nmtui
+  * Set hostname
+=====Resize disk in Proxmox=====
+When the template diskspace is too small. Resize it in Proxmox and do the following in the VM:
+<code>
+rescan-scsi-bus.sh
+growpart /dev/sda 4
+xfs_growfs /var
+</code>
+{{tag>linux}}

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