gcloud container clusters upgrade

NAME: gcloud container clusters upgrade - upgrade the Kubernetes version of an existing container cluster
SYNOPSIS: gcloud container clusters upgrade NAME [--async] [--cluster-version=CLUSTER_VERSION] [--image-type=IMAGE_TYPE] [--master] [--node-pool=NODE_POOL] [--location=LOCATION | --region=REGION | --zone=ZONE, -z ZONE] [GCLOUD_WIDE_FLAG …]
DESCRIPTION: Upgrades the Kubernetes version of an existing container cluster.
This command upgrades the Kubernetes version of the node pools or master of a cluster. Note that the Kubernetes version of the cluster's master is also periodically upgraded automatically as new releases are available.
If desired cluster version is omitted, node pool upgrades default to the current master version and master upgrades default to the default cluster version, which can be found in the server config.
During node pool upgrades, nodes will be deleted and recreated. While persistent Kubernetes resources, such as Pods backed by replication controllers, will be rescheduled onto new nodes, a small cluster may experience a few minutes where there are insufficient nodes available to run all of the scheduled Kubernetes resources.
Please ensure that any data you wish to keep is stored on a persistent disk before upgrading the cluster. Ephemeral Kubernetes resources--in particular, Pods without replication controllers--will be lost, while persistent Kubernetes resources will get rescheduled.
EXAMPLES: Upgrade the node pool pool-1 of sample-cluster to the Kubernetes version of the cluster's master.
gcloud container clusters upgrade sample-cluster --node-pool=pool-1

Upgrade the node pool pool-1 of sample-cluster to Kubernetes version 1.14.7-gke.14:
gcloud container clusters upgrade sample-cluster --node-pool=pool-1 --cluster-version="1.14.7-gke.14"

Upgrade the master of sample-cluster to the default cluster version:
gcloud container clusters upgrade sample-cluster --master
POSITIONAL ARGUMENTS: NAME

The name of the cluster to upgrade.
FLAGS: --async

Return immediately, without waiting for the operation in progress to complete.

--cluster-version=CLUSTER_VERSION

The GKE release version to which to upgrade the cluster's node pools or master.
If desired cluster version is omitted, node pool upgrades default to the current master version and master upgrades default to the default cluster version, which can be found in the server config.
You can find the list of allowed versions for upgrades by running:
gcloud container get-server-config

--image-type=IMAGE_TYPE

The image type to use for the cluster/node pool. Defaults to server-specified.
Image Type specifies the base OS that the nodes in the cluster/node pool will run on. If an image type is specified, that will be assigned to the cluster/node pool and all future upgrades will use the specified image type. If it is not specified the server will pick the default image type.
The default image type and the list of valid image types are available using the following command.
gcloud container get-server-config

--master

Upgrade the cluster's master. Node pools cannot be upgraded at the same time as the master.

--node-pool=NODE_POOL

The node pool to upgrade.

At most one of these can be specified:

--location=LOCATION

Compute zone or region (e.g. us-central1-a or us-central1) for the cluster. Overrides the default compute/region or compute/zone value for this command invocation. Prefer using this flag over the --region or --zone flags.

--region=REGION

Compute region (e.g. us-central1) for a regional cluster. Overrides the default compute/region property value for this command invocation.

--zone=ZONE, -z ZONE

Compute zone (e.g. us-central1-a) for a zonal cluster. Overrides the default compute/zone property value for this command invocation.
GCLOUD WIDE FLAGS: These flags are available to all commands: --access-token-file, --account, --billing-project, --configuration, --flags-file, --flatten, --format, --help, --impersonate-service-account, --log-http, --project, --quiet, --trace-token, --user-output-enabled, --verbosity.
Run $ gcloud help for details.
NOTES: These variants are also available:
gcloud alpha container clusters upgrade

gcloud beta container clusters upgrade