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description= Set the host maintenance policy in a Compute Engine instance to determine its behavior during host events.;
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in place upgrade of windows server run windows server failover clustering ibm spectrum symphony integrate ibm spectrum symphony with google cloud install the compute engine symphony provider install the google kubernetes symphony provider troubleshoot ibm spectrum symphony others load testing distributed load testing using kubernetes ssh port forwarding and load testing analytics monte carlo methods using apache spark machine learning run tensorflow inference workloads with tensorrt5 and nvidia t4 gpu monitor monitor logs view audit logs view usage reports view compute engine operations migrate from activity logs to audit logs view activity logs monitor resources monitor vm and sole tenant node usage observe and monitor vms monitor gpu performance monitor gpu performance on linux vms monitor gpu performance on windows vms monitor disks monitor disk health monitor the replica states of regional disks monitor disks list of metrics for pools monitor pools monitor reservations organize resources using labels scale autoscale groups of vms about autoscaling groups of vms create and manage autoscalers scale based on cpu utilization scale based on predictions scale based on load balancing serving capacity scale based on monitoring metrics scale based on schedules use an autoscaling policy with multiple signals manage autoscalers understand autoscaler decisions view autoscaler logs autoscale node groups reserve vm capacity choose a reservation type sharing reservations best practices for shared reservations allow a project to share reservations on demand reservations about on demand reservations create an on demand reservation for a single project for multiple projects combine an on demand reservation with a cud modify an on demand reservation delete an on demand reservation future reservations about future reservations create a reservation request for a single project for multiple projects modify a reservation request delete a reservation request future reservations in calendar mode about future reservations in calendar mode create a reservation request in calendar mode delete a reservation request in calendar mode view reservations or reservation requests consume a reservation prevent vms from consuming reservations load balancing about load balancing and scaling add an instance group to a load balancer request routing to a multi region external https load balancer cross region load balancing for microsoft iis backends set up internal tcp udp load balancing build reliable and scalable applications use autohealing for highly available applications use load balancing for highly available applications use autoscaling for highly scalable applications globally autoscale a web service on compute engine patterns for scalable and resilient applications patterns for using floating ip addresses on compute engine optimize resource utilization use recommendations to manage resources apply machine type recommendations to vms configure machine type recommendations apply machine type recommendations to migs view and apply idle resources recommendations view and understand vm insights view and understand mig insights manage idle vm recommendations idle vm recommendations overview view and apply idle vm recommendations configure idle vm recommendations manage reservation recommendations reservation recommendations overview view and apply idle reservation recommendations view and apply underutilized reservation recommendations configure idle reservation recommendations configure underutilized reservation recommendations overcommit cpus on sole tenant vms manual live migration about manual live migration manually live migrate vms share sole tenant node groups next generation dynamic resource management cost savings get discounts for committed usage about commitments and committed use discounts cuds resource based cuds purchase resource based commitments without attached reservations with attached reservations for os licenses manage resource based commitments renew commitments automatically extend commitment terms merge and split commitments upgrade commitments share resource based cuds across projects get discounts for sustained usage disk performance optimize hyperdisk performance optimize persistent disk performance optimize local ssd performance workload performance set the number of threads per core customize the number of visible cpu cores analyze the cpu performance using the pmu pmu overview enable the pmu in vms manage the pmu in vms network performance network bandwidth use google virtual nic use irdma network driver use idpf network interface configure a vm with higher bandwidth reduce latency by using compact placement policies optimize tcp network communication optimize tcp network performance optimize tcp network resiliency benchmark higher bandwidth vms optimize app latency with load balancing use dpdk to improve network performance network performance and gpu vms networking and gpu machines use higher network bandwidth patterns for using multiple host nics troubleshoot general tips troubleshoot connectivity troubleshoot rdp troubleshoot ssh troubleshoot os login troubleshoot vms troubleshoot vm operations troubleshoot vm creation troubleshoot resource availability errors troubleshoot bulk api vm creation troubleshoot vm reboots and shutdowns troubleshoot vm suspension troubleshoot vm updates troubleshoot unresponsive vms troubleshoot vm startup troubleshoot fstab errors troubleshoot kernel panic collecting core dumps rescue an inaccessible vm troubleshoot cpu bus locks troubleshoot cpu soft lockups troubleshoot vm configurations troubleshoot arm vms troubleshoot gpu vms troubleshoot nvidia gpu errors generate a nvidia bug report for blackwell gpus troubleshoot nested virtualization troubleshoot using vm screenshots troubleshoot sole tenant nodes troubleshoot vm performance issues troubleshoot sudoers files troubleshoot windows vms troubleshoot windows vms collecting diagnostic information troubleshoot using the serial console troubleshoot using the serial console viewing serial port output troubleshoot instance groups troubleshoot managed instance groups migs troubleshoot os management troubleshoot licenses troubleshoot image import and export troubleshooting sles pay as you go registration troubleshooting ubuntu pro registration troubleshoot metadata server troubleshoot metadata server troubleshoot networking issues troubleshoot common networking issues troubleshoot network drivers troubleshoot vm performance issues troubleshoot storage troubleshoot disk creation troubleshoot full disks and disk resizing troubleshoot disk encryption troubleshoot nvme disks troubleshoot instant snapshots troubleshoot standard snapshots troubleshoot reservations and commitments troubleshoot reservation creation troubleshoot reservation consumption troubleshooting reservation monitoring troubleshoot reservation updates troubleshoot future reservation creation and updates troubleshoot automatic commitment renewal troubleshoot quota errors troubleshoot concurrent operation quota errors troubleshoot workload authentication troubleshoot default service accounts troubleshoot workload to workload authentication ai and ml application development application hosting compute data analytics and pipelines databases distributed hybrid and multicloud industry solutions migration networking observability and monitoring security storage access and resources management costs and usage management infrastructure as code sdk languages frameworks and tools home documentation compute compute engine guides send feedback set the host maintenance policy for a compute instance stay organized with collections save and categorize content based on your preferences linux windows this document explains how to set the host maintenance policy for a compute engine instance to determine its behavior during host events to learn more about host maintenance policies see host maintenance policy a host maintenance policy determines how your instance responds when the host on which the instance is running requires maintenance or encounters an error configuring the host maintenance policy for an instance helps you do the following minimize downtime prevent data loss limitations for host maintenance policies the following limitations apply virtual machine instances using e2 machine types can only live migrate during host maintenance events unless they re spot vms or preemptible vms the following instances can only stop during host maintenance events instances that don t support live migration such as h4d instances z3 instances with more than 18 tib of attached titanium ssd bare metal instances or vms that have gpus attached spot vms or preemptible vms spot vms and preemptible vms can t automatically restart after host errors or programmed stops before you begin if you haven t already set up authentication authentication verifies your identity for access to google cloud services and apis to run code or samples from a local development environment you can authenticate to compute engine by selecting one of the following options select the tab for how you plan to use the samples on this page console when you use the google cloud console to access google cloud services and apis you don t need to set up authentication gcloud install the google cloud cli after installation initialize the google cloud cli by running the following command gcloud init if you re using an external identity provider idp you must first sign in to the gcloud cli with your federated identity note if you installed the gcloud cli previously make sure you have the latest version by running gcloud components update set a default region and zone rest to use the rest api samples on this page in a local development environment you use the credentials you provide to the gcloud cli install the google cloud cli if you re using an external identity provider idp you must first sign in to the gcloud cli with your federated identity for more information see authenticate for using rest in the google cloud authentication documentation required roles to get the permissions that you need to set the host maintenance policy for a compute instance ask your administrator to grant you the compute instance admin v1 roles compute instanceadmin v1 iam role on your project for more information about granting roles see manage access to projects folders and organizations this predefined role contains the permissions required to set the host maintenance policy for a compute instance to see the exact permissions that are required expand the required permissions section required permissions the following permissions are required to set the host maintenance policy for a compute instance to create an instance compute instances create on the project to use a custom image to create the vm colon compute images usereadonly on the image to use a snapshot to create the vm colon compute snapshots usereadonly on the snapshot to use an instance template to create the vm colon compute instancetemplates usereadonly on the instance template to assign a legacy network to the vm colon compute networks use on the project to specify a static ip address for the vm colon compute addresses use on the project to assign an external ip address to the vm when using a legacy network colon compute networks useexternalip on the project to specify a subnet for the vm colon compute subnetworks use on the project or on the chosen subnet to assign an external ip address to the vm when using a vpc network colon compute subnetworks useexternalip on the project or on the chosen subnet to set vm instance metadata for the vm colon compute instances setmetadata on the project to set tags for the vm colon compute instances settags on the vm to set labels for the vm colon compute instances setlabels on the vm to set a service account for the vm to use colon compute instances setserviceaccount on the vm to create a new disk for the vm colon compute disks create on the project to attach an existing disk in read only or read write mode colon compute disks use on the disk to attach an existing disk in read only mode colon compute disks usereadonly on the disk to create an instance template compute instancetemplates create on the project to update the host maintenance policy for an instance compute instances setscheduling on the instance you might also be able to get these permissions with custom roles or other predefined roles available host maintenance properties you can customize how your compute instance behaves during scheduled maintenance or unexpected host events unless you specify otherwise compute engine uses default settings when you create an instance instances in bulk or an instance template you can configure the following host maintenance properties maintenance behavior onhostmaintenance what happens to your instance during a maintenance event on its host that might cause the instance to restart you can set this property to one of the following migrate compute engine automatically live migrates your instance to another host this is the default setting for all types of instances except spot vms and preemptible vms important you must configure instances that don t support live migration to stop terminate during maintenance events otherwise you encounter errors terminate compute engine stops your instance this is the default setting for spot vms or preemptible vms and it s the only supported setting for h4d instances z3 instances with more than 18 tib of attached titanium ssd bare metal instances and instances with gpus or tpus attached automatic restart automaticrestart whether your instance restarts if it crashes or compute engine stops it for a programmed stop such as a maintenance event you can set this property to one of the following on compute engine automatically restarts the instance this is the default setting for all types of instances except for spot vms and preemptible vms you specify this setting as follows for the google cloud console in the advanced pane in the automatic restart list select on recommended for the google cloud cli use the restart on failure flag for rest set the automaticrestart field to true off compute engine doesn t restart the instance this is the default setting for spot vms or preemptible vms you specify this setting as follows for the google cloud console in the advanced pane in the automatic restart list select off for the gcloud cli use the no restart on failure flag for rest set the automaticrestart field to false local ssd data recovery timeout localssdrecoverytimeout this setting applies only to instances that have local ssd disks attached it determines how long compute engine waits to recover data from your local ssd disks after host errors by default this property is unset important the time spent attempting to recover local ssd data doesn t count towards instance availability sla downtime while the instance is in this recovery phase ...
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