Update README.md

README.md

@@ -10,6 +10,49 @@
 ## misc
 https://dannyda.com/2020/05/10/how-to-delete-remove-local-lvm-from-proxmox-ve-pve-and-some-lvm-basics-commands/
 
+## Quorum and qdevice
+Required if cluster with two nodes
+
+```
+#check quorum status
+pvecm status
+
+# output example:
+# Votequorum information
+# ----------------------
+# Expected votes:   2
+# Highest expected: 2
+# Total votes:      2
+# Quorum:           2  
+
+
+# install on all promox servers
+apt update && apt install corosync-qdevice
+
+# install on qdevice
+# tested on a raspberry Pi 4
+
+apt update
+apt install corosync-qnetd 
+apt install corosync-qdevice
+
+# execute on one of proxmox servers
+# change <QDEVICE_IP> with qdevice ip address
+pvecm qdevice setup  <QDEVICE_IP> -f
+
+#check quorum status again
+pvecm status
+
+# output example:
+# Votequorum information
+# ----------------------
+# Expected votes:   3
+# Highest expected: 3
+# Total votes:      3
+# Quorum:           2  
+
+```
+
 ### Power Management
 ```bash
 #disable