kubeadm config
Beginning with v1.8.0, kubeadm uploads the configuration of your cluster to a ConfigMap called
kubeadm-config in the kube-system namespace, and later reads the ConfigMap when upgrading.
This enables correct configuration of system components, and provides a seamless user experience.
You can execute kubeadm config view to view the ConfigMap. If you initialized your cluster using
kubeadm v1.7.x or lower, you must use kubeadm config upload to create the ConfigMap before you
may use kubeadm upgrade.
kubeadm config upload from-file
Upload a configuration file to the in-cluster ConfigMap for kubeadm configuration.
Synopsis
Using this command, you can upload configuration to the ConfigMap in the cluster using the same config file you gave to ‘kubeadm init’. If you initialized your cluster using a v1.7.x or lower kubeadm client and used the –config option, you need to run this command with the same config file before upgrading to v1.8 using ‘kubeadm upgrade’.
The configuration is located in the “kube-system” namespace in the “kubeadm-config” ConfigMap.
kubeadm config upload from-file
Options
--config string Path to a kubeadm config file. WARNING: Usage of a configuration file is experimental.
Options inherited from parent commands
--kubeconfig string The KubeConfig file to use when talking to the cluster. (default "/etc/kubernetes/admin.conf")
kubeadm config upload from-flags
Create the in-cluster configuration file for the first time from using flags.
Synopsis
Using this command, you can upload configuration to the ConfigMap in the cluster using the same flags you gave to ‘kubeadm init’. If you initialized your cluster using a v1.7.x or lower kubeadm client and set certain flags, you need to run this command with the same flags before upgrading to v1.8 using ‘kubeadm upgrade’.
The configuration is located in the “kube-system” namespace in the “kubeadm-config” ConfigMap.
kubeadm config upload from-flags
Options
--apiserver-advertise-address string The IP address the API Server will advertise it's listening on. Specify '0.0.0.0' to use the address of the default network interface.
--apiserver-bind-port int32 Port for the API Server to bind to. (default 6443)
--apiserver-cert-extra-sans stringSlice Optional extra Subject Alternative Names (SANs) to use for the API Server serving certificate. Can be both IP addresses and DNS names.
--cert-dir string The path where to save and store the certificates. (default "/etc/kubernetes/pki")
--feature-gates string A set of key=value pairs that describe feature gates for various features. Options are:
CoreDNS=true|false (ALPHA - default=false)
DynamicKubeletConfig=true|false (ALPHA - default=false)
HighAvailability=true|false (ALPHA - default=false)
SelfHosting=true|false (BETA - default=false)
StoreCertsInSecrets=true|false (ALPHA - default=false)
SupportIPVSProxyMode=true|false (ALPHA - default=false)
--kubernetes-version string Choose a specific Kubernetes version for the control plane. (default "stable-1.8")
--node-name string Specify the node name.
--pod-network-cidr string Specify range of IP addresses for the pod network. If set, the control plane will automatically allocate CIDRs for every node.
--service-cidr string Use alternative range of IP address for service VIPs. (default "10.96.0.0/12")
--service-dns-domain string Use alternative domain for services, e.g. "myorg.internal". (default "cluster.local")
--token string The token to use for establishing bidirectional trust between nodes and masters.
--token-ttl duration The duration before the bootstrap token is automatically deleted. If set to '0', the token will never expire. (default 24h0m0s)
Options inherited from parent commands
--kubeconfig string The KubeConfig file to use when talking to the cluster. (default "/etc/kubernetes/admin.conf")
kubeadm config view
View the kubeadm configuration stored inside the cluster.
Synopsis
Using this command, you can view the ConfigMap in the cluster where the configuration for kubeadm is located.
The configuration is located in the “kube-system” namespace in the “kubeadm-config” ConfigMap.
kubeadm config view
Options inherited from parent commands
--kubeconfig string The KubeConfig file to use when talking to the cluster. (default "/etc/kubernetes/admin.conf")
What’s next
- kubeadm upgrade to upgrade a Kubernetes cluster to a newer version