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le cloud fw allow health check an ingress firewall rule applicable to the instances being load balanced that allows traffic from the load balancer and google cloud health check probe ranges this example uses the target tag allow health check to identify the backend vms to which it should apply allowing traffic from google s health check probe ranges isn t required for hybrid negs however if you re using a combination of hybrid and zonal negs in a single backend service you need to allow traffic from the google health check probe ranges for the zonal negs fw allow proxy only subnet an ingress firewall rule that allows connections from the proxy only subnet to reach the backends this example uses the target tag allow proxy only subnet to identify the backend vms to which it should apply console in the google cloud console go to the firewall policies page go to firewall policies click create firewall rule to create the rule to allow traffic from health check probes enter a name of fw allow health check under network select network under targets select specified target tags populate the target tags field with allow health check set source filter to ipv4 ranges set source ipv4 ranges to 35 191 0 0 16 under protocols and ports select specified protocols and ports select tcp and then enter 80 for the port number click create click create firewall rule again to create the rule to allow incoming connections from the proxy only subnet name fw allow ssh network network priority 1000 direction of traffic ingress action on match allow targets specified target tags target tags allow proxy only subnet source filter ipv4 ranges source ipv4 ranges proxy_only_subnet_range protocols and ports choose specified protocols and ports select tcp and then enter 80 for the port number click create gcloud create the fw allow health check and proxy rule to allow the google cloud health checks to reach the backend instances on tcp port 80 gcloud compute firewall rules create fw allow health check network network action allow direction ingress target tags allow health check source ranges 35 191 0 0 16 rules tcp 80 create an ingress allow firewall rule for the proxy only subnet to allow the load balancer to communicate with backend instances on tcp port 80 gcloud compute firewall rules create fw allow proxy only subnet network network action allow direction ingress target tags allow proxy only subnet source ranges proxy_only_subnet_range rules tcp 80 set up the zonal neg for google cloud based backends we recommend you configure multiple zonal negs in the same region where you configured hybrid connectivity for this example we set up a zonal neg with gce_vm_ip_port type endpoints in the region region first create the vms in the gcp_neg_zone zone then create a zonal neg in the same gcp_neg_zone and add the vms network endpoints to the neg create vms console go to the vm instances page in the google cloud console go to vm instances click create instance set the name to vm a1 for the region choose region and choose any zone this will be referred to as gcp_neg_zone in this procedure in the boot disk section ensure that debian gnu linux 12 bookworm is selected for the boot disk options click choose to change the image if necessary click advanced options and make the following changes click networking and add the following network tags allow ssh allow health check and allow proxy only subnet click edit edit under network interfaces and make the following changes then click done network network subnet lb_subnet_name click management in the startup script field copy and paste the following script contents the script contents are identical for all four vms bin bash apt get update apt get install apache2 y a2ensite default ssl a2enmod ssl vm_hostname curl h metadata flavor google http metadata google internal computemetadata v1 instance name echo page served from vm_hostname tee var www html index html systemctl restart apache2 click create repeat the following steps to create a second vm using the following name and zone combination name vm a2 zone gcp_neg_zone gcloud create the vms by running the following command two times using these combinations for the name of the vm and its zone the script contents are identical for both vms vm_name of vm a1 and gcp_neg_zone zone of your choice vm_name of vm a2 and the same gcp_neg_zone zone gcloud compute instances create vm_name zone gcp_neg_zone image family debian 12 image project debian cloud tags allow ssh allow health check allow proxy only subnet subnet lb_subnet_name metadata startup script bin bash apt get update apt get install apache2 y a2ensite default ssl a2enmod ssl vm_hostname curl h metadata flavor google http metadata google internal computemetadata v1 instance name echo page served from vm_hostname tee var www html index html systemctl restart apache2 create the zonal neg console to create a zonal network endpoint group go to the network endpoint groups page in the google cloud console go to the network endpoint groups page click create network endpoint group enter a name for the zonal neg referred to as gcp_neg_name in this procedure select the network endpoint group type network endpoint group zonal select the network network select the subnet lb_subnet_name select the zone gcp_neg_zone enter the default port 80 click create add endpoints to the zonal neg go to the network endpoint groups page in the google cloud console go to the network endpoint groups click the name of the network endpoint group created in the previous step gcp_neg_name you see the network endpoint group details page in the network endpoints in this group section click add network endpoint you see the add network endpoint page select a vm instance to add its internal ip addresses as network endpoints in the network interface section the name zone and subnet of the vm is displayed in the ipv4 address field enter the ipv4 address of the new network endpoint select the port type if you select default the endpoint uses the default port 80 for all endpoints in the network endpoint group this is sufficient for our example because the apache server is serving requests at port 80 if you select custom enter the port number for the endpoint to use to add more endpoints click add network endpoint and repeat the previous steps after you add all the endpoints click create gcloud create a zonal neg with gce_vm_ip_port endpoints using the gcloud compute network endpoint groups create command gcloud compute network endpoint groups create gcp_neg_name network endpoint type gce_vm_ip_port zone gcp_neg_zone network network subnet lb_subnet_name you can either specify a default port while creating the neg in this step or specify a port number for each endpoint as shown in the next step add endpoints to gcp_neg_name gcloud compute network endpoint groups update gcp_neg_name zone gcp_neg_zone add endpoint instance vm a1 port 80 add endpoint instance vm a2 port 80 set up the hybrid connectivity neg note if you re using distributed envoy health checks with hybrid connectivity neg backends supported only for envoy based load balancers make sure that you configure unique network endpoints for all the negs attached to the same backend service adding the same network endpoint to multiple negs results in undefined behavior when creating the neg use a zone that minimizes the geographic distance between google cloud and your on premises or other cloud environment for example if you are hosting a service in an on premises environment in frankfurt germany you can specify the europe west3 a google cloud zone when you create the neg moreover if you re using cloud interconnect the zone used to create the neg should be in the same region where the cloud interconnect attachment was configured for the available regions and zones see the compute engine documentation available regions and zones console to create a hybrid connectivity network endpoint group go to the network endpoint groups page in the google cloud console go to network endpoint groups click create network endpoint group enter a name for the hybrid neg referred to as on_prem_neg_name in this procedure select the network endpoint group type hybrid connectivity network endpoint group zonal select the network network select the subnet lb_subnet_name select the zone on_prem_neg_zone enter the default port click create add endpoints to the hybrid connectivity neg go to the network endpoint groups page in the google cloud console go to the network endpoint groups page click the name of the network endpoint group created in the previous step on_prem_neg_name you see the network endpoint group detail page in the network endpoints in this group section click add network endpoint you see the add network endpoint page enter the ip address of the new network endpoint select the port type if you select default the endpoint uses the default port for all endpoints in the network endpoint group if you select custom you can enter a different port number for the endpoint to use to add more endpoints click add network endpoint and repeat the previous steps after you add all the non google cloud endpoints click create gcloud create a hybrid connectivity neg using the gcloud compute network endpoint groups create command gcloud compute network endpoint groups create on_prem_neg_name network endpoint type non_gcp_private_ip_port zone on_prem_neg_zone network network add the on premises backend vm endpoint to on_prem_neg_name gcloud compute network endpoint groups update on_prem_neg_name zone on_prem_neg_zone add endpoint ip on_prem_ip_address_1 port port_1 add endpoint ip on_prem_ip_address_2 port port_2 you can use this command to add the network endpoints you previously configured on premises or in your cloud environment repeat add endpoint as many times as needed you can repeat these steps to create multiple hybrid negs if needed configure the load balancer create the load balancer with both zonal and hybrid neg backends console note you cannot use the google cloud console to create a load balancer that has mixed zonal and hybrid connectivity negs backends in a single backend service use either gcloud or the rest api instead gcloud create a health check for the backends gcloud compute health checks create http http_health_check_name region region use serving port health check probes for hybrid neg backends originate from envoy proxies in the proxy only subnet whereas probes for zonal neg backends originate from google s central probe ip ranges load balancing docs health check concepts ip ranges create a backend service you add both the zonal neg and the hybrid connectivity neg as backends to this backend service gcloud compute backend services create backend_service load balancing scheme external_managed protocol http health checks http_health_check_name health checks region region region region add the zonal neg as a backend to the backend service gcloud compute backend services add backend backend_service region region balancing mode rate max rate per endpoint max_request_rate_per_endpoint network endpoint group gcp_neg_name network endpoint group zone gcp_neg_zone for details about configuring the balancing mode see the gcloud cli documentation for the max rate per endpoint parameter add the hybrid neg as a backend to the backend service gcloud compute backend services add backend backend_service region region balancing mode rate max rate per endpoint max_request_rate_per_endpoint network endpoint group on_prem_neg_name network endpoint group zone on_prem_neg_zone for details about configuring the balancing mode see the gcloud cli documentation for the max rate per endpoint parameter create a url map to route incoming requests to the backend service gcloud compute url maps create url_map_name default service backend_service region region optional perform this step if you are using https between the client and the load balancer this step is not required for http load balancers you can create either compute engine or certificate manager certificates use any of the following methods to create certificates using certificate manager regional self managed certificates for information about creating and using regional self managed certificates see deploy a regional self managed certificate certificate maps aren t supported regional google managed certificates certificate maps aren t supported the following types of regional google managed certificates are supported by certificate manager regional google managed certificates with per project dns authorization for more information see deploy a regional google managed certificate with dns authorization regional google managed private certificates with certificate authority service for more information see deploy a regional google managed certificate with certificate authority service after you create certificates attach the certificate directly to the target proxy to create a compute engine self managed ssl certificate resource gcloud compute ssl certificates create ssl_certificate_name certificate crt_file_path private key key_file_path create a target http s proxy to route requests to your url map for an http load balancer create an http target proxy gcloud compute target http proxies create target_http_proxy_name url map url_map_name url map region region region region for an https load balancer create an https target proxy the proxy is the portion of the load balancer that holds the ssl certificate for https load balancing so you also load your certificate in this step gcloud compute target https proxies create target_https_proxy_name ssl certificates ssl_certificate_name url map url_map_name url map region region region region create a forwarding rule to route incoming requests to the proxy don t use the proxy only subnet to create the forwarding rule for an http load balancer gcloud compute forwarding rules create http_forwarding_rule_name load balancing scheme external_managed network network subnet lb_subnet_name address lb_ip_address ports 80 region region target http proxy target_http_proxy_name target http proxy region region for an https load balancer gcloud compute forwarding rules create https_forwarding_rule_name load balancing scheme external_managed network network subnet lb_subnet_name address lb_ip_address ports 443 region region target http proxy target_https_proxy_name target http proxy region region connect your domain to your load balancer after the load balancer is created note the ip address that is associated with the load balancer for example 30 90 80 100 to point your domain to your load balancer create an a record by using your domain registration service if you added multiple domains to your ssl certificate you must add an a record for each one all pointing to the load balancer s ip address for example to create a records for www example com and example com use the following name type data www a 30 90 80 100 a 30 90 80 100 if you use cloud dn...
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