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Proxmox VE How To Setup High Availability

In this video, we show you how to set up high availability in Proxmox VE One of the main goals of a hypervisor cluster is to minimise downtime If you have a standalone hypervisor and that fails, all of the virtual machines it was running will then be out of service But hypervisors like Proxmox VE offer a high availability service to reduce downtime Provided the servers in the cluster have access to the same shared storage and the files for the virtual machines are stored there, if a hypervisor fails then HA can automatically restart a VM on another hypervisor ============================= SUPPORT THE CHANNEL Donate through Paypal: https://paypal.me/DavidMcKone Donate through Buy Me A Coffee: https://buymeacoffee.com/dmckone Become a monthly contributor on Patreon:   / dmckone   Become a monthly contributor on YouTube:    / @techtutorialsdavidmckone   ============================== ============================== MEDIA LINKS: Website - https://www.techtutorials.tv/ Twitter -   / dsmckone1   Facebook -   / dsmckone   Linkedin -   / dmckone   Instagram -   / david.mckone   ============================== Assumptions 1) A Proxmox VE cluster already exists 2) The nodes all have access to shared storage where VMs are stored 3) The time on the hypervisors is synced - Debian uses chrony for this and the servers will need access to an NTP server Steps Taken 1) HA Groups HA needs a group of hypervisors it can use to run a VM on Navigate to Datacenter | HA | Groups then click the create button The ID should be meaningful e.g. if the group should prefer node 1 it could be called Prefer_Node1 NOTE: You cannot rename a group after it has been created Select the nodes for the group and give them a priority to set the preferences of which node a VM should run on; The higher the priority the more preferred a node is TIP: Nodes can have equal priority to allow the resource manager to decide Just bear in mind that you need to balance the resources available when setting preferences The restricted option is to only allow a VM to be migrated by HA to a node that is part of the group NOTE: This has no affect on manual migrations The default setting is unrestricted meaning HA can use other nodes in the cluster if none of the ones in the group can be used NOTE: If restricted is enabled, a VM will be placed into a stopped state if none of the nodes in the group are available, and until one of the group's nodes is back online The nofailback option is to prevent HA automatically migrating a VM to node with a higher priority This will happen if a higher preference node is offline for instance and is then brought back online For stability reasons it may be better to enable this option, because an intermittent server fault could result in it regularly rebooting leading to frequent migration attempts 2) Configure HA There are two options to enable HA for a VM Option 1 Select the VM Click More then select Manage HA from the drop down menu Option 2 Select Datacenter Click HA Click Add then select the VM from the list The Max Restart option is the maximum number of attempts to restart a VM on the existing node The Max Relocate option is the maximum number of attempts to migrate a VM to another node The Request State decides the state the VM should be in and usually the default choice of Started would be selected Other states are covered in the help section. Click the Help button for more details 3) Shutdown Policy The default shutdown policy shuts down VMs and containers when a node is shutdown from within the GUI for instance Navigate to Datacenter | Options, select HA Settings and click Edit if you'd prefer HA protected VMs to be migrated instead for instance Other options are covered in the help section. Click the Help button for more details NOTE: Rebooting a node still results in VMs being shutdown 4) Cluster Resource Scheduling Version 7.3 added a new option for resource allocation when HA migrates a VM that takes into account CPU and memory availability Navigate to Datacenter | Options, select Cluster Resource Scheduling and click Edit NOTE: This is still in a testing phase Chapters 00:00 Intro 00:48 Assumptions 02:50 Create HA Group 04:09 Setup HA For VMs 07:51 Priority 11:27 Testing HA 17:26 No Fail Back 22:08 Restricted 25:16 Shutdown Policy 28:29 Cluster Resource Scheduler Credits LoveLife | Instrumental Prod. Blue Mango | EQMUSEQ.COM by Don Da Vinci https://soundcloud.com/eqmuseq/loveli... proxmox high availability,proxmox ve,proxmox vm high availability,proxmox high availability vm,proxmox high availability shared storage,proxmox,proxmox tutorial