11 posts tagged with "ha"
Upgrading a Proxmox cluster without dropping a VM. The rolling node-at-a-time procedure, live migration to drain a host, the correct Ceph upgrade order with noout, and the corosync rules that keep quorum intact throughout.
Standards-based all-active multihoming in EVPN-VXLAN fabrics. How ESI, Type-1 and Type-4 routes, aliasing, and split-horizon work on Junos QFX, and what to check when a link fails.
Operate Nexus spine/leaf fabrics without surprises. Covers vPC operational checks, port-channel hygiene, OSPF/BGP underlay verification, and failure drills before go-live.
Build a production-ready IOS-XE edge router. Covers secure management, IP SLA tracking for real failover, logging configuration, and common mistakes that break production.
Configure OSPF and BGP graceful restart on VyOS. Covers GR mechanics, helper mode, restart timers, and why graceful restart prevents traffic loss during maintenance.
Implement BFD on VyOS for sub-second failure detection. Covers BFD timers, integration with BGP and OSPF, multihop BFD, and why routing protocol keepalives are too slow.
Honest guide to VyOS high availability using VRRP and conntrack sync. Covers failover configuration, state synchronization, what actually fails over and what doesn't, testing procedures, and why HA is a set of failure scenarios, not a checkbox.
Configuring reliable multi-WAN failover on VyOS with proper health checking. Covers dual ISP setup, weighted load balancing, SLA monitoring, and why failover without tracking is false confidence.
Real talk about Ceph on Proxmox. Covers minimum requirements, network design, OSD configuration, recovery behavior, performance expectations, and why Ceph is great when you accept its costs.
Proxmox HA done right. Covers HA manager configuration, fencing requirements, groups and priorities, maintenance procedures, failure testing, and why HA without tests is just a checkbox.
Building a Proxmox cluster correctly. Covers node joining, quorum mechanics, split-brain prevention, Corosync networking, and why clustering is network discipline, not just a button.