RHCOS partition resizing

Updating the custom paritioning config:
1. Configure 600G for RHCOS sysroot
2. Create 100G partition, intended to be used as LSO storageclass for Monitoring
3. Create partition using the rest of the device, intended to be used as an OSD

README.md

@@ -24,6 +24,11 @@ macAddressList | String | List of MAC address should be set per host In the foll
 - Create the ign file from the custom-config.fcc: 
 ```
 fcct custom-config.fcc > file.ign
+```
+    **TIP:** To change the RHCOS sysroot partition size (currently set to 600G) you can use the following before creating the ign file:
+
+```
+sed -i -e "s/OFFSET=600G/OFFSET=120G/" custom-config.fcc
 ```
 
   - Upload `file.ign` to a shared location which the OpenShift nodes can access.

custom-config.fcc

@@ -54,7 +54,9 @@ storage:
           #!/bin/bash
 
           LABEL=datastore
-          OFFSET=120G
+          OFFSET=600G
+          LSO_LABEL=lsostore
+          LSO_OFFSET=100G
 
           set -euo pipefail
 
@@ -89,7 +91,8 @@ storage:
 
               # Relocate second GPT header to end of disk and create partition
               sgdisk --move-second-header \
-                  --new=0:+"${OFFSET}":0 --change-name=0:"${LABEL}" \
+                  --new=0:+"${OFFSET}":+"${LSO_OFFSET}" --change-name=0:"${LSO_LABEL}" \
+                  --new=0:0:0 --change-name=0:"${LABEL}" \
                   "${device}"
 
               # Wait for device node