Specify Nodes DNS Servers

Page last updated:

This topic describes how to define network profiles for Kubernetes clusters provisioned with VMware Tanzu Kubernetes Grid Integrated Edition on vSphere with NSX-T.

DNS Configuration for Kubernetes Clusters

You can specify multiple DNS entries in a Network Profile to override the Nodes DNS parameter configured in the TKGI tile. In a multi-tenant environment, for example, each tenant can have a different set of DNS servers to do a DNS lookup.

Using a network profile, you can define one or more DNS servers for use with Kubernetes clusters. Elements in the nodes_dns field of a network profile override the DNS server that is configured in the Networking section of the Tanzu Kubernetes Grid Integrated Edition tile. For more information, see Networking.

The nodes_dns field accepts an array with up to three elements. Each element must be a valid IP address of a DNS server. If you are deploying Tanzu Kubernetes Grid Integrated Edition in a multi-tenant environment with multiple Tier-0 routers and a single TKGI foundation (installation) shared across all the tenants, or if you have shared services that can be accessed by all Kubernetes clusters deployed across multiple Tier-0 routers, the first DNS server entered should be a shared DNS server. Subsequent DNS entries in the Network Profile can be specific to the tenant.

The following example network profile, nodes-dns.json, demonstrates the configuration of the nodes_dns parameter with 3 DNS servers. Each entry is the IP address of a DNS server, with the first entry being a public DNS server.

nodes-dns.json
{
    "description": "Overwrite Nodes DNS Entry",
    "name": "nodes_dns_multiple",
    "parameters": {
        "nodes_dns": [
            "8.8.8.8", "192.168.115.1", "192.168.116.1"
        ]
    }
}