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incluster_config.rs
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/
incluster_config.rs
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use thiserror::Error;
// Mounted credential files
const SERVICE_TOKENFILE: &str = "/var/run/secrets/kubernetes.io/serviceaccount/token";
const SERVICE_CERTFILE: &str = "/var/run/secrets/kubernetes.io/serviceaccount/ca.crt";
const SERVICE_DEFAULT_NS: &str = "/var/run/secrets/kubernetes.io/serviceaccount/namespace";
/// Errors from loading in-cluster config
#[derive(Error, Debug)]
pub enum Error {
/// Failed to read the default namespace for the service account
#[error("failed to read the default namespace: {0}")]
ReadDefaultNamespace(#[source] std::io::Error),
/// Failed to read a certificate bundle
#[error("failed to read a certificate bundle: {0}")]
ReadCertificateBundle(#[source] std::io::Error),
/// Failed to parse cluster url
#[error("failed to parse cluster url: {0}")]
ParseClusterUrl(#[source] http::uri::InvalidUri),
/// Failed to parse PEM-encoded certificates
#[error("failed to parse PEM-encoded certificates: {0}")]
ParseCertificates(#[source] pem::PemError),
}
pub fn kube_dns() -> http::Uri {
http::Uri::from_static("https://kubernetes.default.svc/")
}
pub fn token_file() -> String {
SERVICE_TOKENFILE.to_owned()
}
/// Returns certification from specified path in cluster.
pub fn load_cert() -> Result<Vec<Vec<u8>>, Error> {
let certs = std::fs::read(&SERVICE_CERTFILE).map_err(Error::ReadCertificateBundle)?;
super::certs(&certs).map_err(Error::ParseCertificates)
}
/// Returns the default namespace from specified path in cluster.
pub fn load_default_ns() -> Result<String, Error> {
std::fs::read_to_string(&SERVICE_DEFAULT_NS).map_err(Error::ReadDefaultNamespace)
}