---
title: kubefed join
notitle: true
weight: 40
---

## kubefed join

Join a cluster to a federation

### Synopsis


Join adds a cluster to a federation. 

    Current context is assumed to be a federation API
    server. Please use the --context flag otherwise.

```
kubefed join CLUSTER_NAME --host-cluster-context=HOST_CONTEXT [flags]
```

### Examples

```
  # Join a cluster to a federation by specifying the
  # cluster name and the context name of the federation
  # control plane's host cluster. Cluster name must be
  # a valid RFC 1123 subdomain name. Cluster context
  # must be specified if the cluster name is different
  # than the cluster's context in the local kubeconfig.
  kubefed join foo --host-cluster-context=bar
```

### Options

```
      --allow-missing-template-keys          If true, ignore any errors in templates when a field or map key is missing in the template. Only applies to golang and jsonpath output formats. (default true)
      --cluster-context string               Name of the cluster's context in the local kubeconfig. Defaults to cluster name if unspecified.
      --credentials-kubeconfig string        Kubeconfig file path on local file system, which should be used to authenticate with host cluster or the joining cluster (instead of the default kubeconfig).This can be used to override the RBAC based authentication while initialising the federation control plane or joining a cluster to one, even when the cluster exposes the RBAC API.
      --dry-run                              If true, only print the object that would be sent, without sending it.
      --federation-system-namespace string   Namespace in the host cluster where the federation system components are installed (default "federation-system")
      --generator string                     The name of the API generator to use. (default "cluster/v1beta1")
  -h, --help                                 help for join
      --host-cluster-context string          Host cluster context
      --no-headers                           When using the default or custom-column output format, don't print headers (default print headers).
  -o, --output string                        Output format. One of: json|yaml|wide|name|custom-columns=...|custom-columns-file=...|go-template=...|go-template-file=...|jsonpath=...|jsonpath-file=... See custom columns [http://kubernetes.io/docs/user-guide/kubectl-overview/#custom-columns], golang template [http://golang.org/pkg/text/template/#pkg-overview] and jsonpath template [http://kubernetes.io/docs/user-guide/jsonpath].
      --save-config                          If true, the configuration of current object will be saved in its annotation. Otherwise, the annotation will be unchanged. This flag is useful when you want to perform kubectl apply on this object in the future.
  -a, --show-all                             When printing, show all resources (default hide terminated pods.)
      --show-labels                          When printing, show all labels as the last column (default hide labels column)
      --sort-by string                       If non-empty, sort list types using this field specification.  The field specification is expressed as a JSONPath expression (e.g. '{.metadata.name}'). The field in the API resource specified by this JSONPath expression must be an integer or a string.
      --template string                      Template string or path to template file to use when -o=go-template, -o=go-template-file. The template format is golang templates [http://golang.org/pkg/text/template/#pkg-overview].
      --validate                             If true, use a schema to validate the input before sending it (default true)
```

### Options inherited from parent commands

```
      --alsologtostderr                              log to standard error as well as files
      --as string                                    Username to impersonate for the operation
      --as-group stringArray                         Group to impersonate for the operation, this flag can be repeated to specify multiple groups.
      --cache-dir string                             Default HTTP cache directory (default "/Users/tim/.kube/http-cache")
      --certificate-authority string                 Path to a cert file for the certificate authority
      --client-certificate string                    Path to a client certificate file for TLS
      --client-key string                            Path to a client key file for TLS
      --cloud-provider-gce-lb-src-cidrs cidrs        CIDRs opened in GCE firewall for LB traffic proxy & health checks (default 130.211.0.0/22,209.85.152.0/22,209.85.204.0/22,35.191.0.0/16)
      --cluster string                               The name of the kubeconfig cluster to use
      --context string                               The name of the kubeconfig context to use
      --default-not-ready-toleration-seconds int     Indicates the tolerationSeconds of the toleration for notReady:NoExecute that is added by default to every pod that does not already have such a toleration. (default 300)
      --default-unreachable-toleration-seconds int   Indicates the tolerationSeconds of the toleration for unreachable:NoExecute that is added by default to every pod that does not already have such a toleration. (default 300)
      --insecure-skip-tls-verify                     If true, the server's certificate will not be checked for validity. This will make your HTTPS connections insecure
      --ir-data-source string                        Data source used by InitialResources. Supported options: influxdb, gcm. (default "influxdb")
      --ir-dbname string                             InfluxDB database name which contains metrics required by InitialResources (default "k8s")
      --ir-hawkular string                           Hawkular configuration URL
      --ir-influxdb-host string                      Address of InfluxDB which contains metrics required by InitialResources (default "localhost:8080/api/v1/namespaces/kube-system/services/monitoring-influxdb:api/proxy")
      --ir-namespace-only                            Whether the estimation should be made only based on data from the same namespace.
      --ir-password string                           Password used for connecting to InfluxDB (default "root")
      --ir-percentile int                            Which percentile of samples should InitialResources use when estimating resources. For experiment purposes. (default 90)
      --ir-user string                               User used for connecting to InfluxDB (default "root")
      --kubeconfig string                            Path to the kubeconfig file to use for CLI requests.
      --log-backtrace-at traceLocation               when logging hits line file:N, emit a stack trace (default :0)
      --log-dir string                               If non-empty, write log files in this directory
      --log-flush-frequency duration                 Maximum number of seconds between log flushes (default 5s)
      --logtostderr                                  log to standard error instead of files (default true)
      --match-server-version                         Require server version to match client version
  -n, --namespace string                             If present, the namespace scope for this CLI request
      --password string                              Password for basic authentication to the API server
      --request-timeout string                       The length of time to wait before giving up on a single server request. Non-zero values should contain a corresponding time unit (e.g. 1s, 2m, 3h). A value of zero means don't timeout requests. (default "0")
  -s, --server string                                The address and port of the Kubernetes API server
      --stderrthreshold severity                     logs at or above this threshold go to stderr (default 2)
      --token string                                 Bearer token for authentication to the API server
      --user string                                  The name of the kubeconfig user to use
      --username string                              Username for basic authentication to the API server
  -v, --v Level                                      log level for V logs
      --vmodule moduleSpec                           comma-separated list of pattern=N settings for file-filtered logging
```

### SEE ALSO
* [kubefed](kubefed.md)	 - kubefed controls a Kubernetes Cluster Federation

###### Auto generated by spf13/cobra on 1-Dec-2018
