Pre-installation requirements for GKE

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For details about supported platforms for CloudBees CI on modern cloud platforms, such as supported Kubernetes, Helm, and NFS versions, refer to Supported platforms for CloudBees CI on modern cloud platforms.

GKE requirements

The following items are required to install CloudBees CI on modern cloud platforms on GKE:

  • On your local computer or a bastion host:

    • A Kubernetes client with a currently supported version of Kubernetes, installed and configured (kubectl). Beta releases are not supported.

    • gcloud (See Installing Google Cloud SDK for instructions).

  • A GKE cluster running a currently supported version of Kubernetes. Beta releases are not supported.

    • With nodes that have at least 2 CPUs, 4 GiBs of memory (so nodes have 1 full CPU / 1 GiB available after running a master with default settings).

    • The cluster must have network access to container images (public Docker Hub or a private Docker Registry).

  • A namespace in the cluster (provided by your admin) with permissions to create Role and RoleBinding objects.

  • Kubernetes cluster Default Storage Class defined and ready to use.

Storage requirements

Dynamic provisioning is required to create persistent volumes. If you don’t enable dynamic provisioning, you will have to manually create a persistent volume.

Because Jenkins is highly dependent upon the filesystem, the underlying storage provider must provide minimal input/output operations per second (IOPS) and latency.

Ingress requirements

CloudBees CI creates one Ingress object for the operations center and one for each controller. If you do not use subdomains, the operations center and controllers share the same hostname by default. Therefore, you must use an Ingress controller that supports multiple Ingresses using the same hostname. GKE Ingress is not supported for this reason.

Inbound agents use WebSockets to connect to controllers, so the Ingress controller and the corresponding load balancer should support WebSockets.

If you use TCP to connect to inbound agents, the only supported Ingress controller is NGINX Ingress Controller.

Creating your GKE Cluster

To create a Google Kubernetes Engine (GKE) cluster refer to the official Google documentation Create a GKE cluster.

More information on administering a Google Kubernetes cluster is available from the Kubernetes Engine How-to Guides.

More information on Kubernetes concepts is available from the Kubernetes site, including: