第 4 章 Installing on GCP
4.1. Configuring a GCP project
Before you can install OpenShift Container Platform, you must configure a Google Cloud Platform (GCP) project to host it.
4.1.1. Creating a GCP project
To install OpenShift Container Platform, you must create a project in your Google Cloud Platform (GCP) account to host the cluster.
Procedure
Create a project to host your OpenShift Container Platform cluster. See Creating and Managing Projects in the GCP documentation.
重要Your GCP project must use the Premium Network Service Tier if you are using installer-provisioned infrastructure. The Standard Network Service Tier is not supported for clusters installed using the installation program. The installation program configures internal load balancing for the
api-int.<cluster_name>.<base_domain>URL; the Premium Tier is required for internal load balancing.
4.1.2. Enabling API services in GCP
Your Google Cloud Platform (GCP) project requires access to several API services to complete OpenShift Container Platform installation.
Prerequisites
- You created a project to host your cluster.
Procedure
Enable the following required API services in the project that hosts your cluster. See Enabling services in the GCP documentation.
表 4.1. Required API services API service Console service name Compute Engine API
compute.googleapis.comGoogle Cloud APIs
cloudapis.googleapis.comCloud Resource Manager API
cloudresourcemanager.googleapis.comGoogle DNS API
dns.googleapis.comIAM Service Account Credentials API
iamcredentials.googleapis.comIdentity and Access Management (IAM) API
iam.googleapis.comService Management API
servicemanagement.googleapis.comService Usage API
serviceusage.googleapis.comGoogle Cloud Storage JSON API
storage-api.googleapis.comCloud Storage
storage-component.googleapis.com
4.1.3. Configuring DNS for GCP
To install OpenShift Container Platform, the Google Cloud Platform (GCP) account you use must have a dedicated public hosted zone in the same project that you host the OpenShift Container Platform cluster. This zone must be authoritative for the domain. The DNS service provides cluster DNS resolution and name lookup for external connections to the cluster.
Procedure
Identify your domain, or subdomain, and registrar. You can transfer an existing domain and registrar or obtain a new one through GCP or another source.
注意If you purchase a new domain, it can take time for the relevant DNS changes to propagate. For more information about purchasing domains through Google, see Google Domains.
Create a public hosted zone for your domain or subdomain in your GCP project. See Creating public zones in the GCP documentation.
Use an appropriate root domain, such as
openshiftcorp.com, or subdomain, such asclusters.openshiftcorp.com.Extract the new authoritative name servers from the hosted zone records. See Look up your Cloud DNS name servers in the GCP documentation.
You typically have four name servers.
- Update the registrar records for the name servers that your domain uses. For example, if you registered your domain to Google Domains, see the following topic in the Google Domains Help: How to switch to custom name servers.
- If you migrated your root domain to Google Cloud DNS, migrate your DNS records. See Migrating to Cloud DNS in the GCP documentation.
- If you use a subdomain, follow your company’s procedures to add its delegation records to the parent domain. This process might include a request to your company’s IT department or the division that controls the root domain and DNS services for your company.
4.1.4. GCP account limits
The OpenShift Container Platform cluster uses a number of Google Cloud Platform (GCP) components, but the default Quotas do not affect your ability to install a default OpenShift Container Platform cluster.
A default cluster, which contains three compute and three control plane machines, uses the following resources. Note that some resources are required only during the bootstrap process and are removed after the cluster deploys.
| Service | Component | Location | Total resources required | Resources removed after bootstrap |
|---|---|---|---|---|
| Service account | IAM | Global | 5 | 0 |
| Firewall rules | Compute | Global | 11 | 1 |
| Forwarding rules | Compute | Global | 2 | 0 |
| In-use global IP addresses | Compute | Global | 4 | 1 |
| Health checks | Compute | Global | 3 | 0 |
| Images | Compute | Global | 1 | 0 |
| Networks | Compute | Global | 2 | 0 |
| Static IP addresses | Compute | Region | 4 | 1 |
| Routers | Compute | Global | 1 | 0 |
| Routes | Compute | Global | 2 | 0 |
| Subnetworks | Compute | Global | 2 | 0 |
| Target pools | Compute | Global | 3 | 0 |
| CPUs | Compute | Region | 28 | 4 |
| Persistent disk SSD (GB) | Compute | Region | 896 | 128 |
If any of the quotas are insufficient during installation, the installation program displays an error that states both which quota was exceeded and the region.
Be sure to consider your actual cluster size, planned cluster growth, and any usage from other clusters that are associated with your account. The CPU, static IP addresses, and persistent disk SSD (storage) quotas are the ones that are most likely to be insufficient.
If you plan to deploy your cluster in one of the following regions, you will exceed the maximum storage quota and are likely to exceed the CPU quota limit:
-
asia-east2 -
asia-northeast2 -
asia-south1 -
australia-southeast1 -
europe-north1 -
europe-west2 -
europe-west3 -
europe-west6 -
northamerica-northeast1 -
southamerica-east1 -
us-west2
You can increase resource quotas from the GCP console, but you might need to file a support ticket. Be sure to plan your cluster size early so that you can allow time to resolve the support ticket before you install your OpenShift Container Platform cluster.
4.1.5. Creating a service account in GCP
OpenShift Container Platform requires a Google Cloud Platform (GCP) service account that provides authentication and authorization to access data in the Google APIs. If you do not have an existing IAM service account that contains the required roles in your project, you must create one.
Prerequisites
- You created a project to host your cluster.
Procedure
- Create a service account in the project that you use to host your OpenShift Container Platform cluster. See Creating a service account in the GCP documentation.
Grant the service account the appropriate permissions. You can either grant the individual permissions that follow or assign the
Ownerrole to it. See Granting roles to a service account for specific resources.注意While making the service account an owner of the project is the easiest way to gain the required permissions, it means that service account has complete control over the project. You must determine if the risk that comes from offering that power is acceptable.
Create the service account key in JSON format. See Creating service account keys in the GCP documentation.
The service account key is required to create a cluster.
4.1.5.1. Required GCP permissions
When you attach the Owner role to the service account that you create, you grant that service account all permissions, including those that are required to install OpenShift Container Platform. To deploy an OpenShift Container Platform cluster, the service account requires the following permissions. If you deploy your cluster into an existing VPC, the service account does not require certain networking permissions, which are noted in the following lists:
Required roles for the installation program
- Compute Admin
- Security Admin
- Service Account Admin
- Service Account User
- Storage Admin
Required roles for creating network resources during installation
- DNS Administrator
Optional roles
For the cluster to create new limited credentials for its Operators, add the following role:
- Service Account Key Admin
The roles are applied to the service accounts that the control plane and compute machines use:
| Account | Roles |
|---|---|
| Control Plane |
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| Compute |
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4.1.6. Supported GCP regions
You can deploy an OpenShift Container Platform cluster to the following Google Cloud Platform (GCP) regions:
-
asia-east1(Changhua County, Taiwan) -
asia-east2(Hong Kong) -
asia-northeast1(Tokyo, Japan) -
asia-northeast2(Osaka, Japan) -
asia-south1(Mumbai, India) -
asia-southeast1(Jurong West, Singapore) -
australia-southeast1(Sydney, Australia) -
europe-north1(Hamina, Finland) -
europe-west1(St. Ghislain, Belgium) -
europe-west2(London, England, UK) -
europe-west3(Frankfurt, Germany) -
europe-west4(Eemshaven, Netherlands) -
europe-west6(Zürich, Switzerland) -
northamerica-northeast1(Montréal, Québec, Canada) -
southamerica-east1(São Paulo, Brazil) -
us-central1(Council Bluffs, Iowa, USA) -
us-east1(Moncks Corner, South Carolina, USA) -
us-east4(Ashburn, Northern Virginia, USA) -
us-west1(The Dalles, Oregon, USA) -
us-west2(Los Angeles, California, USA)
4.1.7. Next steps
- Install an OpenShift Container Platform cluster on GCP. You can install a customized cluster or quickly install a cluster with default options.
