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'.

--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.

--azure-container-registry-config string

Path to the file containing Azure container registry configuration information.

--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

--cloud-provider-gce-l7lb-src-cidrs cidrs     Default: 130.211.0.0/22,35.191.0.0/16

CIDRs opened in GCE firewall for L7 LB traffic proxy & health checks

--cloud-provider-gce-lb-src-cidrs cidrs     Default: 130.211.0.0/22,209.85.152.0/22,209.85.204.0/22,35.191.0.0/16

CIDRs opened in GCE firewall for L4 LB traffic proxy & health checks

--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

See Also

  • kubectl - kubectl controls the Kubernetes cluster manager

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Last modified January 06, 2024 at 2:39 PM PST: Revise kubectl reference layout (7100b9ce32)