Struct Client

Source

pub struct Client { /* private fields */ }

Expand description

Client for connecting with a Kubernetes cluster.

The easiest way to instantiate the client is either by inferring the configuration from the environment using Client::try_default or with an existing Config using Client::try_from.

Implementations§

Source §

impl Client

Constructors and low-level api interfaces.

Most users only need Client::try_default or Client::new from this block.

The many various lower level interfaces here are for more advanced use-cases with specific requirements.

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pub fn new<S, B, T>(service: S, default_namespace: T) -> Self
where S: Service<Request<Body>, Response = Response> + Send + 'static, S::Future: Send + 'static, S::Error: Into<BoxError>, B: Body<Data = Bytes> + Send + 'static, B::Error: Into<BoxError>, T: Into<String>,

Create a Client using a custom Service stack.

ConfigExt provides extensions for building a custom stack.

To create with the default stack with a Config, use Client::try_from.

To create with the default stack with an inferred Config, use Client::try_default.

§Example

use kube::{client::ConfigExt, Client, Config};
use tower::ServiceBuilder;
use hyper_util::rt::TokioExecutor;

let config = Config::infer().await?;
let service = ServiceBuilder::new()
    .layer(config.base_uri_layer())
    .option_layer(config.auth_layer()?)
    .service(hyper_util::client::legacy::Client::builder(TokioExecutor::new()).build_http());
let client = Client::new(service, config.default_namespace);

Source

pub async fn try_default() -> Result<Self>

Create and initialize a Client using the inferred configuration.

Will use Config::infer which attempts to load the local kubeconfig first, and then if that fails, trying the in-cluster environment variables.

Will fail if neither configuration could be loaded.

let client = Client::try_default().await?;

If you already have a Config then use Client::try_from instead.

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pub fn default_namespace(&self) -> &str

Get the default namespace for the client

The namespace is either configured on context in the kubeconfig, falls back to default when running locally, or uses the service account’s namespace when deployed in-cluster.

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pub async fn send(&self, request: Request<Body>) -> Result<Response<Body>>

Perform a raw HTTP request against the API and return the raw response back. This method can be used to get raw access to the API which may be used to, for example, create a proxy server or application-level gateway between localhost and the API server.

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pub async fn connect( &self, request: Request<Vec<u8>>, ) -> Result<WebSocketStream<TokioIo<Upgraded>>>

Make WebSocket connection.

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pub async fn request<T>(&self, request: Request<Vec<u8>>) -> Result<T>
where T: DeserializeOwned,

Perform a raw HTTP request against the API and deserialize the response as JSON to some known type.

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pub async fn request_text(&self, request: Request<Vec<u8>>) -> Result<String>

Perform a raw HTTP request against the API and get back the response as a string

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pub async fn request_stream( &self, request: Request<Vec<u8>>, ) -> Result<impl AsyncBufRead>

Perform a raw HTTP request against the API and stream the response body.

The response can be processed using AsyncReadExt and AsyncBufReadExt.

Source

pub async fn request_status<T>( &self, request: Request<Vec<u8>>, ) -> Result<Either<T, Status>>
where T: DeserializeOwned,

Perform a raw HTTP request against the API and get back either an object deserialized as JSON or a Status Object.

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pub async fn request_events<T>( &self, request: Request<Vec<u8>>, ) -> Result<impl TryStream<Item = Result<WatchEvent<T>>>>
where T: Clone + DeserializeOwned,

Perform a raw request and get back a stream of WatchEvent objects

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impl Client

Low level discovery methods using k8s_openapi types.

Consider using the discovery module for easier-to-use variants of this functionality. The following methods might be deprecated to avoid confusion between similarly named types within discovery.

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pub async fn apiserver_version(&self) -> Result<Info>

Returns apiserver version.

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pub async fn list_api_groups(&self) -> Result<APIGroupList>

Lists api groups that apiserver serves.

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pub async fn list_api_group_resources( &self, apiversion: &str, ) -> Result<APIResourceList>

Lists resources served in given API group.

§Example usage:

let apigroups = client.list_api_groups().await?;
for g in apigroups.groups {
    let ver = g
        .preferred_version
        .as_ref()
        .or_else(|| g.versions.first())
        .expect("preferred or versions exists");
    let apis = client.list_api_group_resources(&ver.group_version).await?;
    dbg!(apis);
}