Proxmox VE System Administrator Cheatsheet (TL;DR)

Node Stats & Health

• Cluster Status: pvecm status (Check quorum details and node math)
• Cluster Members: pvecm nodes
• Resource Usage: pvesh get /nodes/{nodename}/status
• Storage Status: pvesm status
• System Logs: journalctl -f -u pvedaemon -u pveproxy

Corosync & Quorum Essentials

• Check Quorum Status: corosync-cmapctl | grep quorum (Verifies node voting power)
• Detailed Ring Status: corosync-cfgtool -s (Checks if communication rings/links are healthy)
• Emergency Vote Override: pvecm expected 1 (Forces quorum to 1 to bypass multi-node requirements)
• Reload Corosync Config: corosync-cfgtool -R (Applies changes to corosync.conf without a reboot)
• View Ring Members: corosync-cmapctl runtime.totem.pg.mrp.srp.members

VM Basics (QEMU/KVM)

• List VMs: qm list
• Start VM: qm start <vmid>
• Shutdown VM: qm shutdown <vmid>
• Force Stop VM: qm stop <vmid>
• VM Configuration: qm config <vmid>
• Migrate VM: qm migrate <vmid> <target-node> --online

Container Basics (LXC)

• List Containers: pct list
• Start Container: pct start <vmid>
• Shutdown Container: pct shutdown <vmid>
• Force Stop Container: pct stop <vmid>
• Enter CT Shell: pct enter <vmid>
• CT Configuration: pct config <vmid>

DRBD & LINBIT SDS

• DRBD Status Overview: drbdadm status (Check replication state and connection)
• Detailed Core Stats: drbdsetup status --verbose --statistics
• Linstor Cluster Status: linstor node list
• Linstor Storage Pools: linstor storage-pool list
• Linstor Resource List: linstor resource list
• Force DRBD Primary: drbdadm primary <resource> --force