Cloud administrators can leverage the Google Cloud Platform (GCP) plug-in to create load balancers to support custom solutions, including high availability.
You can configure several aspects of load balancer configuration to support specific requirements. These features can support provisioning infrastructure for SAP NetWeaver and SAP Hana, for example. This configuration enables you to deploy different load balancer instances in different availability zones.
- Create a GCP cloud account if you do not have one.
- Set up flavor and image mappings.
- Create a default network profile.
- Create compute availability zones and tag them appropriately. These tags enable you to provision instances and instance groups to specific availability zones in a template.
- The template should model the appropriate load balancer configuration with specifications for health checks, instances, instance groups, backend services, forwarding rules, and firewalls.
- The template should specify the virtual machines and availability zones in which they should be deployed.
Setting up an internal TCP load balancer
This example template uses allocation helpers to provide allocation logic for several resources. The template contains two instances, instance groups, a health check resource, a firewall resource, a backend service resource, and a forwarding rule resource.
After deploying this template, you can log in to your Google Cloud Console to filter and choose the instances you want to add to your instance group. Only instances in the same zone as the instance group will be shown as options. See Instance groups in your Google Cloud Console.
formatVersion: 1 inputs: suffix: type: string title: '' resources: Allocations_Image_1: type: Allocations.Image properties: image: ubuntu Allocations_Compute_1: type: Allocations.Compute properties: accountType: gcp constraints: - tag: zone-a Allocations_Compute_2: type: Allocations.Compute properties: constraints: - tag: zone-b Allocations_Flavor_1: type: Allocations.Flavor properties: flavor: medium Idem_GCP_COMPUTE_NETWORK_1: type: Idem.GCP.COMPUTE.NETWORK properties: name: network-doc-1-${input.suffix} account: ${resource.Allocations_Compute_1.selectedCloudAccount.name} auto_create_subnetworks: false Idem_GCP_COMPUTE_SUBNETWORK_1: type: Idem.GCP.COMPUTE.SUBNETWORK properties: name: subnetwork-doc-1-${input.suffix} account: ${resource.Allocations_Compute_1.selectedCloudAccount.name} network: ${Idem_GCP_COMPUTE_NETWORK_1.resource_id} region: ${resource.Allocations_Compute_1.selectedRegion.name} ip_cidr_range: '10.0.10.0/24' Idem_GCP_COMPUTE_INSTANCE_1: type: Idem.GCP.COMPUTE.INSTANCE properties: name: vm-doc-1-${input.suffix} zone: ${resource.Allocations_Compute_1.selectedPlacementCompute.id} account: ${resource.Allocations_Compute_1.selectedCloudAccount.name} can_ip_forward: false project: ${resource.Allocations_Compute_1.selectedCloudAccount.additionalProperties.gcp.project} network_interfaces: - name: nic0 stack_type: IPV4_ONLY subnetwork: ${Idem_GCP_COMPUTE_SUBNETWORK_1.resource_id} disks: - initialize_params: disk_name: disk-doc-boot-1-${input.suffix} source_image: ${resource.Allocations_Image_1.selectedImageId} disk_size_gb: 12 disk_type: ${'/projects/' + resource.Allocations_Flavor_1.selectedCloudAccount.additionalProperties.gcp.project + '/zones/' + resource.Allocations_Compute_1.selectedPlacementCompute.id + '/diskTypes/pd-standard'} boot: true auto_delete: true machine_type: ${'/projects/' + resource.Allocations_Flavor_1.selectedCloudAccount.additionalProperties.gcp.project + '/zones/' + resource.Allocations_Compute_1.selectedPlacementCompute.id + '/machineTypes/' + resource.Allocations_Flavor_1.selectedInstanceTypeName} tags: items: - net-tag-1 - net-tag-2 Idem_GCP_COMPUTE_INSTANCE_2: type: Idem.GCP.COMPUTE.INSTANCE properties: name: vm-doc-2-${input.suffix} zone: ${resource.Allocations_Compute_2.selectedPlacementCompute.id} account: ${resource.Allocations_Compute_1.selectedCloudAccount.name} can_ip_forward: false project: ${resource.Allocations_Compute_1.selectedCloudAccount.additionalProperties.gcp.project} network_interfaces: - name: nic0 stack_type: IPV4_ONLY subnetwork: ${Idem_GCP_COMPUTE_SUBNETWORK_1.resource_id} disks: - initialize_params: disk_name: disk-doc-boot-2-${input.suffix} source_image: ${resource.Allocations_Image_1.selectedImageId} disk_size_gb: 12 disk_type: ${'/projects/' + resource.Allocations_Flavor_1.selectedCloudAccount.additionalProperties.gcp.project + '/zones/' + resource.Allocations_Compute_1.selectedPlacementCompute.id + '/diskTypes/pd-standard'} boot: true auto_delete: true machine_type: ${'/projects/' + resource.Allocations_Flavor_1.selectedCloudAccount.additionalProperties.gcp.project + '/zones/' + resource.Allocations_Compute_2.selectedPlacementCompute.id + '/machineTypes/' + resource.Allocations_Flavor_1.selectedInstanceTypeName} tags: items: - net-tag-1 - net-tag-2 Idem_GCP_COMPUTE_INSTANCE_GROUP_1: type: Idem.GCP.COMPUTE.INSTANCE_GROUP properties: name: ig-doc-1-${input.suffix} account: ${resource.Allocations_Compute_1.selectedCloudAccount.name} zone: ${resource.Allocations_Compute_1.selectedPlacementCompute.id} network: ${Idem_GCP_COMPUTE_NETWORK_1.resource_id} Idem_GCP_COMPUTE_INSTANCE_GROUP_2: type: Idem.GCP.COMPUTE.INSTANCE_GROUP properties: name: ig-doc-2-${input.suffix} account: ${resource.Allocations_Compute_1.selectedCloudAccount.name} zone: ${resource.Allocations_Compute_2.selectedPlacementCompute.id} network: ${Idem_GCP_COMPUTE_NETWORK_1.resource_id} Idem_GCP_COMPUTE_HEALTH_CHECK_1: type: Idem.GCP.COMPUTE.HEALTH_CHECK properties: name: hc-doc-1-${input.suffix} account: ${resource.Allocations_Compute_1.selectedCloudAccount.name} type_: TCP check_interval_sec: 10 timeout_sec: 10 unhealthy_threshold: 2 healthy_threshold: 2 tcp_health_check: port: 80 proxy_header: NONE Idem_GCP_COMPUTE_FIREWALL_1: type: Idem.GCP.COMPUTE.FIREWALL properties: name: f-doc-1-${input.suffix} account: ${resource.Allocations_Compute_1.selectedCloudAccount.name} network: ${Idem_GCP_COMPUTE_NETWORK_1.resource_id} direction: INGRESS target_tags: - net-tag-1 - net-tag-2 allowed: - ip_protocol: tcp ports: - ${resource.Idem_GCP_COMPUTE_HEALTH_CHECK_1.tcp_health_check.port} Idem_GCP_COMPUTE_BACKEND_SERVICE_1: type: Idem.GCP.COMPUTE.BACKEND_SERVICE properties: name: bs-doc-1-${input.suffix} account: ${resource.Allocations_Compute_1.selectedCloudAccount.name} health_checks: - ${resource.Idem_GCP_COMPUTE_HEALTH_CHECK_1.resource_id} load_balancing_scheme: INTERNAL region: ${resource.Allocations_Compute_1.selectedRegion.id} network: ${Idem_GCP_COMPUTE_NETWORK_1.resource_id} failover_policy: drop_traffic_if_unhealthy: true disable_connection_drain_on_failover: true failover_ratio: 1 backends: - group: ${resource.Idem_GCP_COMPUTE_INSTANCE_GROUP_1.resource_id} - group: ${resource.Idem_GCP_COMPUTE_INSTANCE_GROUP_2.resource_id} failover: true Idem_GCP_COMPUTE_FORWARDING_RULE_1: type: Idem.GCP.COMPUTE.FORWARDING_RULE properties: ip_protocol: TCP name: fr-doc-1-${input.suffix} account: ${resource.Allocations_Compute_1.selectedCloudAccount.name} load_balancing_scheme: INTERNAL backend_service: ${resource.Idem_GCP_COMPUTE_BACKEND_SERVICE_1.resource_id} all_ports: true region: ${resource.Allocations_Compute_1.selectedRegion.id} subnetwork: ${Idem_GCP_COMPUTE_SUBNETWORK_1.resource_id} ip_address: '10.0.10.102'