This page describes the fields in an IP block file, which is used in the setup of Anthos clusters on VMware (GKE on-prem).
You use an IP block file to describe a set of machines and the network that the machines are on. Here are some examples of how you would use an IP block file:
List the hostnames and static IP addresses for the nodes in your admin cluster.
List the hostnames and static IP addresses for the nodes in a user cluster.
List the hostnames and static IP addresses for the VMs that run the bundled Seesaw load balancer for your admin cluster.
List the hostnames and static IP addresses for the VMs that run the bundled Seesaw load balancer for a user cluster.
Template
Filling in the fields in an IP block file
blocks
An array of objects, each of which describes a set of hosts.
blocks[i].netmask
String. The subnet mask for the set of hosts. For example:
blocks: - netmask: "255.255.252.0"
blocks[i].gateway
String. The address of the default gateway for the set of hosts. For example:
blocks: - netmask: "255.255.252.0" gateway: "172.16.23.254"
blocks[i].ips
An array of objects. Each object has an individual IP address or a CIDR block of IP addresses. If the object has an individual IP address, it can also have a hostname.
For example:
blocks: - netmask: "255.255.252.0" gateway: "172.16.23.254" ips: - ip: 172.16.20.10 hostname: admin-host1 - ip: 172.16.20.11 hostname: admin-host2 - ip: 172.16.20.12/30
The preceding example specifies six IP addresses: two individual addresses and a CIDR block of four addresses.
If you set ip
to a CIDR block, do not specify a value for hostname
.
When you do not specify a value for hostname
, Anthos clusters on VMware uses the
VM's name from vSphere as the hostname.
Old fields
Previous versions of Anthos clusters on VMware used a hostconfig
section in the
IP block file:
hostconfig: dns: "" tod: "" otherdns: - "" ... othertod: - "" ... searchdomainsfordns: - "" ...
Do not provide a hostconfig
section in your IP block file. Instead,
fill in the network.hostConfig
section of your
admin cluster configuration file
or
user cluster configuration file.
If you fill in the network.hostConfig
section of a cluster configuration file,
Anthos clusters on VMware ignores the hostconfig
sections of all IP block files
associated with the cluster.
If you do not fill in the network.hostConfig
section of a cluster
configuration file, then for backward compatibility, Anthos clusters on VMware
reads the hostconfig
sections of the IP block files associated with
the cluster.