kubeadm alpha
Caution:kubeadm alphaprovides a preview of a set of features made available for gathering feedback from the community. Please try it out and give us feedback!
kubeadm alpha certs renew
You can renew all Kubernetes certificates using the all subcommand or renew them selectively.
For more details about certificate expiration and renewal see the certificate management documentation.
- renew
- all
- admin.conf
- apiserver-etcd-client
- apiserver-kubelet-client
- apiserver
- controller-manager.conf
- etcd-healthcheck-client
- etcd-peer
- etcd-server
- front-proxy-client
- scheduler.conf
Synopsis
This command is not meant to be run on its own. See list of available subcommands.
kubeadm alpha certs renew [flags]
Options
| -h, --help | |
| help for renew | |
Options inherited from parent commands
| --rootfs string | |
| [EXPERIMENTAL] The path to the 'real' host root filesystem. | |
Synopsis
Renew all known certificates necessary to run the control plane. Renewals are run unconditionally, regardless of expiration date. Renewals can also be run individually for more control.
kubeadm alpha certs renew all [flags]
Options
| --cert-dir string Default: "/etc/kubernetes/pki" | |
| The path where to save the certificates | |
| --config string | |
| Path to a kubeadm configuration file. | |
| --csr-dir string | |
| The path to output the CSRs and private keys to | |
| --csr-only | |
| Create CSRs instead of generating certificates | |
| -h, --help | |
| help for all | |
| --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. | |
| --use-api | |
| Use the Kubernetes certificate API to renew certificates | |
Options inherited from parent commands
| --rootfs string | |
| [EXPERIMENTAL] The path to the 'real' host root filesystem. | |
Synopsis
Renew the certificate embedded in the kubeconfig file for the admin to use and for kubeadm itself.
Renewals run unconditionally, regardless of certificate expiration date; extra attributes such as SANs will be based on the existing file/certificates, there is no need to resupply them.
Renewal by default tries to use the certificate authority in the local PKI managed by kubeadm; as alternative it is possible to use K8s certificate API for certificate renewal, or as a last option, to generate a CSR request.
After renewal, in order to make changes effective, is required to restart control-plane components and eventually re-distribute the renewed certificate in case the file is used elsewhere.
kubeadm alpha certs renew admin.conf [flags]
Options
| --cert-dir string Default: "/etc/kubernetes/pki" | |
| The path where to save the certificates | |
| --config string | |
| Path to a kubeadm configuration file. | |
| --csr-dir string | |
| The path to output the CSRs and private keys to | |
| --csr-only | |
| Create CSRs instead of generating certificates | |
| -h, --help | |
| help for admin.conf | |
| --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. | |
| --use-api | |
| Use the Kubernetes certificate API to renew certificates | |
Options inherited from parent commands
| --rootfs string | |
| [EXPERIMENTAL] The path to the 'real' host root filesystem. | |
Synopsis
Renew the certificate the apiserver uses to access etcd.
Renewals run unconditionally, regardless of certificate expiration date; extra attributes such as SANs will be based on the existing file/certificates, there is no need to resupply them.
Renewal by default tries to use the certificate authority in the local PKI managed by kubeadm; as alternative it is possible to use K8s certificate API for certificate renewal, or as a last option, to generate a CSR request.
After renewal, in order to make changes effective, is required to restart control-plane components and eventually re-distribute the renewed certificate in case the file is used elsewhere.
kubeadm alpha certs renew apiserver-etcd-client [flags]
Options
| --cert-dir string Default: "/etc/kubernetes/pki" | |
| The path where to save the certificates | |
| --config string | |
| Path to a kubeadm configuration file. | |
| --csr-dir string | |
| The path to output the CSRs and private keys to | |
| --csr-only | |
| Create CSRs instead of generating certificates | |
| -h, --help | |
| help for apiserver-etcd-client | |
| --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. | |
| --use-api | |
| Use the Kubernetes certificate API to renew certificates | |
Options inherited from parent commands
| --rootfs string | |
| [EXPERIMENTAL] The path to the 'real' host root filesystem. | |
Synopsis
Renew the certificate for the API server to connect to kubelet.
Renewals run unconditionally, regardless of certificate expiration date; extra attributes such as SANs will be based on the existing file/certificates, there is no need to resupply them.
Renewal by default tries to use the certificate authority in the local PKI managed by kubeadm; as alternative it is possible to use K8s certificate API for certificate renewal, or as a last option, to generate a CSR request.
After renewal, in order to make changes effective, is required to restart control-plane components and eventually re-distribute the renewed certificate in case the file is used elsewhere.
kubeadm alpha certs renew apiserver-kubelet-client [flags]
Options
| --cert-dir string Default: "/etc/kubernetes/pki" | |
| The path where to save the certificates | |
| --config string | |
| Path to a kubeadm configuration file. | |
| --csr-dir string | |
| The path to output the CSRs and private keys to | |
| --csr-only | |
| Create CSRs instead of generating certificates | |
| -h, --help | |
| help for apiserver-kubelet-client | |
| --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. | |
| --use-api | |
| Use the Kubernetes certificate API to renew certificates | |
Options inherited from parent commands
| --rootfs string | |
| [EXPERIMENTAL] The path to the 'real' host root filesystem. | |
Synopsis
Renew the certificate for serving the Kubernetes API.
Renewals run unconditionally, regardless of certificate expiration date; extra attributes such as SANs will be based on the existing file/certificates, there is no need to resupply them.
Renewal by default tries to use the certificate authority in the local PKI managed by kubeadm; as alternative it is possible to use K8s certificate API for certificate renewal, or as a last option, to generate a CSR request.
After renewal, in order to make changes effective, is required to restart control-plane components and eventually re-distribute the renewed certificate in case the file is used elsewhere.
kubeadm alpha certs renew apiserver [flags]
Options
| --cert-dir string Default: "/etc/kubernetes/pki" | |
| The path where to save the certificates | |
| --config string | |
| Path to a kubeadm configuration file. | |
| --csr-dir string | |
| The path to output the CSRs and private keys to | |
| --csr-only | |
| Create CSRs instead of generating certificates | |
| -h, --help | |
| help for apiserver | |
| --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. | |
| --use-api | |
| Use the Kubernetes certificate API to renew certificates | |
Options inherited from parent commands
| --rootfs string | |
| [EXPERIMENTAL] The path to the 'real' host root filesystem. | |
Synopsis
Renew the certificate embedded in the kubeconfig file for the controller manager to use.
Renewals run unconditionally, regardless of certificate expiration date; extra attributes such as SANs will be based on the existing file/certificates, there is no need to resupply them.
Renewal by default tries to use the certificate authority in the local PKI managed by kubeadm; as alternative it is possible to use K8s certificate API for certificate renewal, or as a last option, to generate a CSR request.
After renewal, in order to make changes effective, is required to restart control-plane components and eventually re-distribute the renewed certificate in case the file is used elsewhere.
kubeadm alpha certs renew controller-manager.conf [flags]
Options
| --cert-dir string Default: "/etc/kubernetes/pki" | |
| The path where to save the certificates | |
| --config string | |
| Path to a kubeadm configuration file. | |
| --csr-dir string | |
| The path to output the CSRs and private keys to | |
| --csr-only | |
| Create CSRs instead of generating certificates | |
| -h, --help | |
| help for controller-manager.conf | |
| --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. | |
| --use-api | |
| Use the Kubernetes certificate API to renew certificates | |
Options inherited from parent commands
| --rootfs string | |
| [EXPERIMENTAL] The path to the 'real' host root filesystem. | |
Synopsis
Renew the certificate for liveness probes to healthcheck etcd.
Renewals run unconditionally, regardless of certificate expiration date; extra attributes such as SANs will be based on the existing file/certificates, there is no need to resupply them.
Renewal by default tries to use the certificate authority in the local PKI managed by kubeadm; as alternative it is possible to use K8s certificate API for certificate renewal, or as a last option, to generate a CSR request.
After renewal, in order to make changes effective, is required to restart control-plane components and eventually re-distribute the renewed certificate in case the file is used elsewhere.
kubeadm alpha certs renew etcd-healthcheck-client [flags]
Options
| --cert-dir string Default: "/etc/kubernetes/pki" | |
| The path where to save the certificates | |
| --config string | |
| Path to a kubeadm configuration file. | |
| --csr-dir string | |
| The path to output the CSRs and private keys to | |
| --csr-only | |
| Create CSRs instead of generating certificates | |
| -h, --help | |
| help for etcd-healthcheck-client | |
| --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. | |
| --use-api | |
| Use the Kubernetes certificate API to renew certificates | |
Options inherited from parent commands
| --rootfs string | |
| [EXPERIMENTAL] The path to the 'real' host root filesystem. | |
Synopsis
Renew the certificate for etcd nodes to communicate with each other.
Renewals run unconditionally, regardless of certificate expiration date; extra attributes such as SANs will be based on the existing file/certificates, there is no need to resupply them.
Renewal by default tries to use the certificate authority in the local PKI managed by kubeadm; as alternative it is possible to use K8s certificate API for certificate renewal, or as a last option, to generate a CSR request.
After renewal, in order to make changes effective, is required to restart control-plane components and eventually re-distribute the renewed certificate in case the file is used elsewhere.
kubeadm alpha certs renew etcd-peer [flags]
Options
| --cert-dir string Default: "/etc/kubernetes/pki" | |
| The path where to save the certificates | |
| --config string | |
| Path to a kubeadm configuration file. | |
| --csr-dir string | |
| The path to output the CSRs and private keys to | |
| --csr-only | |
| Create CSRs instead of generating certificates | |
| -h, --help | |
| help for etcd-peer | |
| --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. | |
| --use-api | |
| Use the Kubernetes certificate API to renew certificates | |
Options inherited from parent commands
| --rootfs string | |
| [EXPERIMENTAL] The path to the 'real' host root filesystem. | |
Synopsis
Renew the certificate for serving etcd.
Renewals run unconditionally, regardless of certificate expiration date; extra attributes such as SANs will be based on the existing file/certificates, there is no need to resupply them.
Renewal by default tries to use the certificate authority in the local PKI managed by kubeadm; as alternative it is possible to use K8s certificate API for certificate renewal, or as a last option, to generate a CSR request.
After renewal, in order to make changes effective, is required to restart control-plane components and eventually re-distribute the renewed certificate in case the file is used elsewhere.
kubeadm alpha certs renew etcd-server [flags]
Options
| --cert-dir string Default: "/etc/kubernetes/pki" | |
| The path where to save the certificates | |
| --config string | |
| Path to a kubeadm configuration file. | |
| --csr-dir string | |
| The path to output the CSRs and private keys to | |
| --csr-only | |
| Create CSRs instead of generating certificates | |
| -h, --help | |
| help for etcd-server | |
| --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. | |
| --use-api | |
| Use the Kubernetes certificate API to renew certificates | |
Options inherited from parent commands
| --rootfs string | |
| [EXPERIMENTAL] The path to the 'real' host root filesystem. | |
Synopsis
Renew the certificate for the front proxy client.
Renewals run unconditionally, regardless of certificate expiration date; extra attributes such as SANs will be based on the existing file/certificates, there is no need to resupply them.
Renewal by default tries to use the certificate authority in the local PKI managed by kubeadm; as alternative it is possible to use K8s certificate API for certificate renewal, or as a last option, to generate a CSR request.
After renewal, in order to make changes effective, is required to restart control-plane components and eventually re-distribute the renewed certificate in case the file is used elsewhere.
kubeadm alpha certs renew front-proxy-client [flags]
Options
| --cert-dir string Default: "/etc/kubernetes/pki" | |
| The path where to save the certificates | |
| --config string | |
| Path to a kubeadm configuration file. | |
| --csr-dir string | |
| The path to output the CSRs and private keys to | |
| --csr-only | |
| Create CSRs instead of generating certificates | |
| -h, --help | |
| help for front-proxy-client | |
| --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. | |
| --use-api | |
| Use the Kubernetes certificate API to renew certificates | |
Options inherited from parent commands
| --rootfs string | |
| [EXPERIMENTAL] The path to the 'real' host root filesystem. | |
Synopsis
Renew the certificate embedded in the kubeconfig file for the scheduler manager to use.
Renewals run unconditionally, regardless of certificate expiration date; extra attributes such as SANs will be based on the existing file/certificates, there is no need to resupply them.
Renewal by default tries to use the certificate authority in the local PKI managed by kubeadm; as alternative it is possible to use K8s certificate API for certificate renewal, or as a last option, to generate a CSR request.
After renewal, in order to make changes effective, is required to restart control-plane components and eventually re-distribute the renewed certificate in case the file is used elsewhere.
kubeadm alpha certs renew scheduler.conf [flags]
Options
| --cert-dir string Default: "/etc/kubernetes/pki" | |
| The path where to save the certificates | |
| --config string | |
| Path to a kubeadm configuration file. | |
| --csr-dir string | |
| The path to output the CSRs and private keys to | |
| --csr-only | |
| Create CSRs instead of generating certificates | |
| -h, --help | |
| help for scheduler.conf | |
| --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. | |
| --use-api | |
| Use the Kubernetes certificate API to renew certificates | |
Options inherited from parent commands
| --rootfs string | |
| [EXPERIMENTAL] The path to the 'real' host root filesystem. | |
kubeadm alpha certs certificate-key
This command can be used to generate a new control-plane certificate key.
The key can be passed as --certificate-key to kubeadm init and kubeadm join
to enable the automatic copy of certificates when joining additional control-plane nodes.
Synopsis
This command will print out a secure randomly-generated certificate key that can be used with the “init” command.
You can also use “kubeadm init –upload-certs” without specifying a certificate key and it will generate and print one for you.
kubeadm alpha certs certificate-key [flags]
Options
| -h, --help | |
| help for certificate-key | |
Options inherited from parent commands
| --rootfs string | |
| [EXPERIMENTAL] The path to the 'real' host root filesystem. | |
kubeadm alpha certs check-expiration
This command checks expiration for the certificates in the local PKI managed by kubeadm. For more details about certificate expiration and renewal see the certificate management documentation.
Synopsis
Checks expiration for the certificates in the local PKI managed by kubeadm.
kubeadm alpha certs check-expiration [flags]
Options
| --cert-dir string Default: "/etc/kubernetes/pki" | |
| The path where to save the certificates | |
| --config string | |
| Path to a kubeadm configuration file. | |
| -h, --help | |
| help for check-expiration | |
| --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. | |
kubeadm alpha kubeconfig user
The user subcommand can be used for the creation of kubeconfig files for additional users.
Synopsis
Kubeconfig file utilities.
Alpha Disclaimer: this command is currently alpha.
Options
| -h, --help | |
| help for kubeconfig | |
Options inherited from parent commands
| --rootfs string | |
| [EXPERIMENTAL] The path to the 'real' host root filesystem. | |
Synopsis
Output a kubeconfig file for an additional user.
Alpha Disclaimer: this command is currently alpha.
kubeadm alpha kubeconfig user [flags]
Examples
# Output a kubeconfig file for an additional user named foo
kubeadm alpha kubeconfig user --client-name=foo
Options
| --apiserver-advertise-address string | |
| The IP address the API server is accessible on | |
| --apiserver-bind-port int32 Default: 6443 | |
| The port the API server is accessible on | |
| --cert-dir string Default: "/etc/kubernetes/pki" | |
| The path where certificates are stored | |
| --client-name string | |
| The name of user. It will be used as the CN if client certificates are created | |
| -h, --help | |
| help for user | |
| --org stringSlice | |
| The orgnizations of the client certificate. It will be used as the O if client certificates are created | |
| --token string | |
| The token that should be used as the authentication mechanism for this kubeconfig, instead of client certificates | |
Options inherited from parent commands
| --rootfs string | |
| [EXPERIMENTAL] The path to the 'real' host root filesystem. | |
kubeadm alpha kubelet config
Use the following commands to either download the kubelet configuration from the cluster or to enable the DynamicKubeletConfiguration feature.
Synopsis
This command is not meant to be run on its own. See list of available subcommands.
Options
| -h, --help | |
| help for kubelet | |
Options inherited from parent commands
| --rootfs string | |
| [EXPERIMENTAL] The path to the 'real' host root filesystem. | |
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. Either kubeadm autodetects the kubelet version by exec-ing “kubelet –version” or respects the –kubelet-version parameter.
Alpha Disclaimer: this command is currently alpha.
kubeadm alpha kubelet config download [flags]
Examples
# Download the kubelet configuration from the ConfigMap in the cluster. Autodetect the kubelet version.
kubeadm alpha phase kubelet config download
# Download the kubelet configuration from the ConfigMap in the cluster. Use a specific desired kubelet version.
kubeadm alpha phase kubelet config download --kubelet-version 1.17.0
Options
| -h, --help | |
| help for download | |
| --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. | |
| --kubelet-version string | |
| The desired version for the kubelet. Defaults to being autodetected from 'kubelet --version'. | |
Options inherited from parent commands
| --rootfs string | |
| [EXPERIMENTAL] The path to the 'real' host root filesystem. | |
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. Either kubeadm autodetects the kubelet version by exec-ing “kubelet –version” or respects the –kubelet-version parameter.
Alpha Disclaimer: this command is currently alpha.
kubeadm alpha kubelet config download [flags]
Examples
# Download the kubelet configuration from the ConfigMap in the cluster. Autodetect the kubelet version.
kubeadm alpha phase kubelet config download
# Download the kubelet configuration from the ConfigMap in the cluster. Use a specific desired kubelet version.
kubeadm alpha phase kubelet config download --kubelet-version 1.17.0
Options
| -h, --help | |
| help for download | |
| --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. | |
| --kubelet-version string | |
| The desired version for the kubelet. Defaults to being autodetected from 'kubelet --version'. | |
Options inherited from parent commands
| --rootfs string | |
| [EXPERIMENTAL] The path to the 'real' host root filesystem. | |
kubeadm alpha selfhosting pivot
The subcommand pivot can be used to convert a static Pod-hosted control plane into a self-hosted one.
Synopsis
This command is not meant to be run on its own. See list of available subcommands.
Options
| -h, --help | |
| help for selfhosting | |
Options inherited from parent commands
| --rootfs string | |
| [EXPERIMENTAL] The path to the 'real' host root filesystem. | |
Synopsis
Convert static Pod files for control plane components into self-hosted DaemonSets configured via the Kubernetes API.
See the documentation for self-hosting limitations.
Alpha Disclaimer: this command is currently alpha.
kubeadm alpha selfhosting pivot [flags]
Examples
# Convert a static Pod-hosted control plane into a self-hosted one.
kubeadm alpha phase self-hosting convert-from-staticpods
Options
| --cert-dir string Default: "/etc/kubernetes/pki" | |
| The path where certificates are stored | |
| --config string | |
| Path to a kubeadm configuration file. | |
| -f, --force | |
| Pivot the cluster without prompting for confirmation | |
| -h, --help | |
| help for pivot | |
| --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. | |
| -s, --store-certs-in-secrets | |
| Enable storing certs in secrets | |
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
Feedback
Was this page helpful?
Thanks for the feedback. If you have a specific, answerable question about how to use Kubernetes, ask it on Stack Overflow. Open an issue in the GitHub repo if you want to report a problem or suggest an improvement.
Page last modified on October 09, 2019 at 1:09 PM PST by
remove myself from some reviewers lists (#16753) (Page History)