You are viewing documentation for Kubernetes version: v1.21
Kubernetes v1.21 documentation is no longer actively maintained. The version you are currently viewing is a static snapshot. For up-to-date documentation, see the latest version.
kubeadm upgrade phase
In v1.15.0, kubeadm introduced preliminary support for kubeadm upgrade node phases.
Phases for other kubeadm upgrade sub-commands such as apply, could be added in the
following releases.
kubeadm upgrade node phase
Using this phase you can choose to execute the separate steps of the upgrade of
secondary control-plane or worker nodes. Please note that kubeadm upgrade apply still has to
be called on a primary control-plane node.
Use this command to invoke single phase of the node workflow
Synopsis
Use this command to invoke single phase of the node workflow
Options
| -h, --help | |
help for phase | |
Options inherited from parent commands
| --rootfs string | |
[EXPERIMENTAL] The path to the 'real' host root filesystem. | |
Run upgrade node pre-flight checks
Synopsis
Run pre-flight checks for kubeadm upgrade node.
kubeadm upgrade node phase preflight [flags]
Options
| -h, --help | |
help for preflight | |
| --ignore-preflight-errors strings | |
A list of checks whose errors will be shown as warnings. Example: 'IsPrivilegedUser,Swap'. Value 'all' ignores errors from all checks. | |
Options inherited from parent commands
| --rootfs string | |
[EXPERIMENTAL] The path to the 'real' host root filesystem. | |
Upgrade the control plane instance deployed on this node, if any
Synopsis
Upgrade the control plane instance deployed on this node, if any
kubeadm upgrade node phase control-plane [flags]
Options
| --certificate-renewal Default: true | |
Perform the renewal of certificates used by component changed during upgrades. | |
| --dry-run | |
Do not change any state, just output the actions that would be performed. | |
| --etcd-upgrade Default: true | |
Perform the upgrade of etcd. | |
| --experimental-patches string | |
Path to a directory that contains files named "target[suffix][+patchtype].extension". For example, "kube-apiserver0+merge.yaml" or just "etcd.json". "patchtype" can be one of "strategic", "merge" or "json" and they match the patch formats supported by kubectl. The default "patchtype" is "strategic". "extension" must be either "json" or "yaml". "suffix" is an optional string that can be used to determine which patches are applied first alpha-numerically. | |
| -h, --help | |
help for control-plane | |
| --kubeconfig string Default: "/etc/kubernetes/admin.conf" | |
The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file. | |
Options inherited from parent commands
| --rootfs string | |
[EXPERIMENTAL] The path to the 'real' host root filesystem. | |
Upgrade the kubelet configuration for this node
Synopsis
Download the kubelet configuration from a ConfigMap of the form "kubelet-config-1.X" in the cluster, where X is the minor version of the kubelet. kubeadm uses the KuberneteVersion field in the kubeadm-config ConfigMap to determine what the desired kubelet version is.
kubeadm upgrade node phase kubelet-config [flags]
Options
| --dry-run | |
Do not change any state, just output the actions that would be performed. | |
| -h, --help | |
help for kubelet-config | |
| --kubeconfig string Default: "/etc/kubernetes/admin.conf" | |
The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file. | |
Options inherited from parent commands
| --rootfs string | |
[EXPERIMENTAL] The path to the 'real' host root filesystem. | |
What's next
- kubeadm init to bootstrap a Kubernetes control-plane node
- kubeadm join to connect a node to the cluster
- kubeadm reset to revert any changes made to this host by
kubeadm initorkubeadm join - kubeadm upgrade to upgrade a kubeadm node
- kubeadm alpha to try experimental functionality