Guides tagged “proxmox”
Step-by-step MdmHost guides about proxmox, sorted A-Z.
42 guides · page 2 of 3
Proxmox networking: bridges, VLANs and routed setups
Configure Proxmox VE networking: the default vmbr0 bridge, VLAN-aware bridges, private NAT networks and routed setups for hosting providers that give single IPs.
Proxmox SDN: create zones, VNets and subnets
Use Proxmox Software-Defined Networking to manage networks cluster-wide: simple zones with NAT and DHCP, VLAN and VXLAN zones, VNets, subnets and applying changes.
Proxmox security hardening checklist for the host
Harden a Proxmox VE host: restrict the web UI and SSH, use keys and 2FA, add fail2ban for port 8006, keep updates flowing, isolate management networks and secure backups.
Proxmox storage explained: add LVM-thin, ZFS, directory and NFS storage
Choose and add Proxmox VE storage: LVM-thin and ZFS for VM disks, directories for ISOs and backups, and NFS or CIFS shares, with the content types each one supports.
Proxmox templates and clones: linked clone vs full clone
Turn a prepared VM into a Proxmox template, choose between linked and full clones, clean machine IDs before cloning, and deploy new VMs in seconds.
Proxmox troubleshooting: fix common VE errors
Solve frequent Proxmox VE problems: locked VMs, web UI not loading, VMs that will not start, full storage, lost quorum, and network loss after configuration changes.
Proxmox users, permissions, API tokens and two-factor authentication
Stop using root for everything in Proxmox VE: create users and groups, grant roles on paths, add API tokens for automation and turn on TOTP two-factor login.
Proxmox VM performance tuning: CPU, disk and network settings
Speed up Proxmox VMs with the right settings: CPU type, VirtIO SCSI single with IO threads, cache and discard, multiqueue networking, ballooning and NUMA.
Remove a node from a Proxmox cluster and add a QDevice
Safely remove a node from a Proxmox cluster, clean up its leftovers, and add a QDevice so a two-node cluster keeps quorum when one node goes down.
Replace a failed disk in a Proxmox ZFS pool
Spot a degraded ZFS pool on Proxmox, identify the failed disk by serial number, replace it with zpool replace, and fix the boot partitions when it is a boot disk.
Resize a Proxmox VM disk and grow the filesystem
Increase a Proxmox VM disk in the web UI or with qm resize, then grow the partition, LVM and filesystem inside Linux or Windows so the extra space is usable.
Set up a Proxmox VE cluster and enable high availability
Join Proxmox VE nodes into a cluster, understand corosync quorum and the need for three votes, add shared storage, migrate VMs between nodes and enable HA for automatic failover.
Set up Ceph on a Proxmox cluster (hyper-converged storage)
Install Ceph from the Proxmox web UI: network planning, monitors and managers, OSDs on each node, a replicated pool for VM disks, and health checks.
Set up Proxmox Backup Server and connect it to Proxmox VE
Install Proxmox Backup Server on a separate machine, create a datastore and user, add it as storage in Proxmox VE, schedule deduplicated backups and set pruning.
Set up Proxmox email notifications for backups and alerts
Make sure Proxmox tells you when backups fail or disks degrade: configure an SMTP notification target, matchers for backup and system events, and test delivery.
Set up Proxmox repositories and update Proxmox VE safely
Switch Proxmox VE from the enterprise repository to the no-subscription repository when you have no subscription, then update hosts and clusters without surprises.
Set up Proxmox ZFS storage replication between nodes
Replicate VM disks between Proxmox nodes with ZFS so you can fail over or migrate quickly without shared storage: requirements, schedules, HA use and limits.
Set up the Proxmox VE firewall for the host and VMs
Enable the built-in Proxmox firewall safely: allow the web UI and SSH first, then add datacenter, node and per-VM rules, security groups and IP sets.
Take and roll back Proxmox snapshots for VMs and containers
Use Proxmox snapshots before risky changes: which storage supports them, how to include RAM, roll back or delete them, and why a snapshot is not a backup.
Upgrade Proxmox VE to a new major version safely
Plan a Proxmox major upgrade: back up, run the official checker script, switch repositories to the new Debian release, upgrade node by node and verify the cluster.
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