Update 'README.md'

README.md

@@ -2,17 +2,31 @@
 
 Fedora CoreOS template for proxmox
 
+## Create FCOS VM Template
 
-### CloudInit
+### Configuration
 
-Only these parameters are supported by our cloudinit wrapper :
+* **vmsetup.sh**
 
-- User (only one default = admin)
+```
-- Passwd
+TEMPLATE_VMID="1000"                     # Template Proxmox VMID 
-- DNS domain
+TEMPLATE_VMSTORAGE="thin-ssd"           # Proxmox storage  
-- DNS Servers
+SNIPPET_STORAGE="local"                 # Snippets storage for hook and ignition file
-- SSH public key
+VMDISK_OPTIONS=",discard=on"            # Add options to vmdisk
-- IP Config (ipv4 only)
+```
+
+* **fcos-base-tmplt.yaml**
+
+The ignition file provided is only a working basis.
+For a more advanced configuration go to https://docs.fedoraproject.org/en-US/fedora-coreos/
+
+it contains :
+
+* Correct fstrim service with no fstab file
+* Install qemu-guest-agent on first boot
+* Install Geco-iT CloudInit wrapper
+* Raise console message logging level from DEBUG (7) to WARNING (4)
+* Add Geco-iT motd/issue
 
 ### Script output
 ```
@@ -52,3 +66,24 @@ update VM 900: -hookscript local:snippets/hook-fcos.sh
 Convert VM 900 in proxmox vm template... [done]
 ```
 
+## Operation
+
+Before starting an FCOS VM, we create an ignition file by merging the data from the cloudinit and the fcos-base-tmplt.yaml file.
+Then we modify the configuration of the vm to add the loading of the ignition file and we reset the start of the vm.
+
+<p align="center">
+  <img src="./screenshot/fcos_proxmox_first_start.png" alt="">
+</p>
+
+## CloudInit
+
+Only these parameters are supported by our cloudinit wrapper:
+
+* User (only one) default = admin
+* Passwd
+* DNS domain
+* DNS Servers
+* SSH public key
+* IP Configuration (ipv4 only)
+
+The settings are applied at boot