kops/docs/advanced/experimental.md

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# Experimental features
Enable experimental features with:
`export KOPS_FEATURE_FLAGS=`
The following experimental features are currently available:
* `+EnableExternalDNS` - Enable external-dns with default settings (ingress sources only).
* `+VPCSkipEnableDNSSupport` - Enables creation of a VPC that does not need DNSSupport enabled.
* `+SkipTerraformFormat` - Do not `terraform fmt` the generated terraform files.
* `+EnableExternalCloudController` - Enables the use of cloud-controller-manager introduced in v1.7.
* `+EnableSeparateConfigBase` - Allow a config-base that is different from the state store.
* `+SpecOverrideFlag` - Allow setting spec values on `kops create`.
* `+ExperimentalClusterDNS` - Turns off validation of the kubelet cluster dns flag.
* `+EnableNodeAuthorization` - Enable support of Node Authorization, see [node_authorization.md](../node_authorization.md).
* `+GoogleCloudBucketAcl` - Enables setting the ACL on the state store bucket when using GCS
* `+KeepLaunchConfigurations` - Prevents garbage collection of old launch configurations
* `+Spotinst` - Enables the use of the Spot integration
* `+SpotinstOcean` - Enables the use of the Spot Ocean integration
* `+SpotinstHybrid` - Toogles between hybrid and full instance group implementations
* `-SpotinstController` - Toggles the installation of the Spot controller addon off
* `+SkipEtcdVersionCheck` - Bypasses the check that etcd-manager is using a supported etcd version
* `+TerraformJSON` - Produce kubernetes.ts.json file instead of writing HCL v1 syntax. Can be consumed by terraform 0.12