Detailed description of a few selected arguments

controls the CIDR which can access the admin endpoints (SSH to each node, HTTPS to the master).

If not specified, no IP level restrictions will apply (though there are still restrictions, for example you needa permitted SSH key to access the SSH service!).

Examples:

CLI:

--admin-access=18.0.0.0/8 to restrict to IPs in the 18.0.0.0/8 CIDR

--admin-access=18.0.0.0/8 --admin-access=19.0.0.0/8 to restrict to IPs in the 18.0.0.0/8 and 19.0.0.0/8 CIDR blocks

YAML:

dns-zone

dns-zone controls the Route53 hosted zone in which DNS records will be created. It can either by the nameof the hosted zone (example.com), or it can be the ID of the hosted zone (Z1GABCD1ABC2DEF)

Suppose you are creating a cluster named “dev.kubernetes.example.com`:

• You could also use

You do have to set up the DNS nameservers so your hosted zone resolves. kops used to create the hostedzone for you, but now (as you have to set up the nameservers anyway), there doesn’t seem much reason to do so!

If you don’t specify a dns-zone, kops will list all your hosted zones, and choose the longest thatis a suffix of your cluster name. So for dev.kubernetes.example.com, if you have kubernetes.example.com,example.com and somethingelse.example.com, it would choose kubernetes.example.com. example.com matchesbut is shorter; is not a suffix-match.

Examples:

--dns-zone=example.com to use the hosted zone with a name of example.com

cloud-labels specifies tags for instance groups in AWS. The supported format is a CSV list of key=value pairs.Keys and values must not contain embedded commas but they may contain equals signs (‘=’) as long as the field isquoted:

• --cloud-labels "Project=\"Name=Foo Customer=Acme\",Owner=Jane Doe" will be parsed as {Project:”Name=Foo Customer=Acme”,Owner: “Jane Doe”}

UpdatePolicy

Values:

• external updates are performed by an external system (or manually), should not be automatically applied

out determines the directory into which kubectl will write the target output. It defaults to out/terraform

API only Arguments

Certain arguments can only be passed via the API, eg, . The following documents some of the more interesting or lesser-known options.

kubeletPreferredAddressTypes

The apiserver can now select which type of kubelet-reported address to use for apiserver->node communications, using the —kubelet-preferred-address-types flag. (https://github.com/kubernetes/kubernetes/pull/35497, @liggitt)

Example: