kubectl expose

Synopsis

Expose a resource as a new Kubernetes service.

Looks up a deployment, service, replica set, replication controller or pod by name and uses the selector for that resource as the selector for a new service on the specified port. A deployment or replica set will be exposed as a service only if its selector is convertible to a selector that service supports, i.e. when the selector contains only the matchLabels component. Note that if no port is specified via --port and the exposed resource has multiple ports, all will be re-used by the new service. Also if no labels are specified, the new service will re-use the labels from the resource it exposes.

Possible resources include (case insensitive):

pod (po), service (svc), replicationcontroller (rc), deployment (deploy), replicaset (rs)

kubectl expose (-f FILENAME | TYPE NAME) [--port=port] [--protocol=TCP|UDP|SCTP] [--target-port=number-or-name] [--name=name] [--external-ip=external-ip-of-service] [--type=type]

Examples

  # Create a service for a replicated nginx, which serves on port 80 and connects to the containers on port 8000
  kubectl expose rc nginx --port=80 --target-port=8000
  
  # Create a service for a replication controller identified by type and name specified in "nginx-controller.yaml", which serves on port 80 and connects to the containers on port 8000
  kubectl expose -f nginx-controller.yaml --port=80 --target-port=8000
  
  # Create a service for a pod valid-pod, which serves on port 444 with the name "frontend"
  kubectl expose pod valid-pod --port=444 --name=frontend
  
  # Create a second service based on the above service, exposing the container port 8443 as port 443 with the name "nginx-https"
  kubectl expose service nginx --port=443 --target-port=8443 --name=nginx-https
  
  # Create a service for a replicated streaming application on port 4100 balancing UDP traffic and named 'video-stream'.
  kubectl expose rc streamer --port=4100 --protocol=UDP --name=video-stream
  
  # Create a service for a replicated nginx using replica set, which serves on port 80 and connects to the containers on port 8000
  kubectl expose rs nginx --port=80 --target-port=8000
  
  # Create a service for an nginx deployment, which serves on port 80 and connects to the containers on port 8000
  kubectl expose deployment nginx --port=80 --target-port=8000

Options

--allow-missing-template-keys Default: true
	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.
--cluster-ip string
	ClusterIP to be assigned to the service. Leave empty to auto-allocate, or set to 'None' to create a headless service.
--dry-run string[="unchanged"] Default: "none"
	Must be "none", "server", or "client". If client strategy, only print the object that would be sent, without sending it. If server strategy, submit server-side request without persisting the resource.
--external-ip string
	Additional external IP address (not managed by Kubernetes) to accept for the service. If this IP is routed to a node, the service can be accessed by this IP in addition to its generated service IP.
--field-manager string Default: "kubectl-expose"
	Name of the manager used to track field ownership.
-f, --filename strings
	Filename, directory, or URL to files identifying the resource to expose a service
-h, --help
	help for expose
-k, --kustomize string
	Process the kustomization directory. This flag can't be used together with -f or -R.
-l, --labels string
	Labels to apply to the service created by this call.
--load-balancer-ip string
	IP to assign to the LoadBalancer. If empty, an ephemeral IP will be created and used (cloud-provider specific).
--name string
	The name for the newly created object.
-o, --output string
	Output format. One of: (json, yaml, name, go-template, go-template-file, template, templatefile, jsonpath, jsonpath-as-json, jsonpath-file).
--override-type string Default: "merge"
	The method used to override the generated object: json, merge, or strategic.
--overrides string
	An inline JSON override for the generated object. If this is non-empty, it is used to override the generated object. Requires that the object supply a valid apiVersion field.
--port string
	The port that the service should serve on. Copied from the resource being exposed, if unspecified
--protocol string
	The network protocol for the service to be created. Default is 'TCP'.
-R, --recursive
	Process the directory used in -f, --filename recursively. Useful when you want to manage related manifests organized within the same directory.
--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.
--selector string
	A label selector to use for this service. Only equality-based selector requirements are supported. If empty (the default) infer the selector from the replication controller or replica set.)
--session-affinity string
	If non-empty, set the session affinity for the service to this; legal values: 'None', 'ClientIP'
--show-managed-fields
	If true, keep the managedFields when printing objects in JSON or YAML format.
--target-port string
	Name or number for the port on the container that the service should direct traffic to. Optional.
--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].
--type string
	Type for this service: ClusterIP, NodePort, LoadBalancer, or ExternalName. Default is 'ClusterIP'.

Options inherited from parent commands

--as string
	Username to impersonate for the operation. User could be a regular user or a service account in a namespace.
--as-group strings
	Group to impersonate for the operation, this flag can be repeated to specify multiple groups.
--as-uid string
	UID to impersonate for the operation.
--cache-dir string Default: "$HOME/.kube/cache"
	Default cache directory
--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
--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 Default: 300
	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-unreachable-toleration-seconds int Default: 300
	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.
--disable-compression
	If true, opt-out of response compression for all requests to the server
--insecure-skip-tls-verify
	If true, the server's certificate will not be checked for validity. This will make your HTTPS connections insecure
--kubeconfig string
	Path to the kubeconfig file to use for CLI requests.
--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
--profile string Default: "none"
	Name of profile to capture. One of (none\|cpu\|heap\|goroutine\|threadcreate\|block\|mutex)
--profile-output string Default: "profile.pprof"
	Name of the file to write the profile to
--request-timeout string Default: "0"
	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.
-s, --server string
	The address and port of the Kubernetes API server
--storage-driver-buffer-duration duration Default: 1m0s
	Writes in the storage driver will be buffered for this duration, and committed to the non memory backends as a single transaction
--storage-driver-db string Default: "cadvisor"
	database name
--storage-driver-host string Default: "localhost:8086"
	database host:port
--storage-driver-password string Default: "root"
	database password
--storage-driver-secure
	use secure connection with database
--storage-driver-table string Default: "stats"
	table name
--storage-driver-user string Default: "root"
	database username
--tls-server-name string
	Server name to use for server certificate validation. If it is not provided, the hostname used to contact the server is used
--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
--version version[=true]
	--version, --version=raw prints version information and quits; --version=vX.Y.Z... sets the reported version
--warnings-as-errors
	Treat warnings received from the server as errors and exit with a non-zero exit code