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admission.rs
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938 lines (816 loc) · 30.5 KB
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use super::validation;
use crate::k8s::policy::{
httproute, server::Selector, AuthorizationPolicy, AuthorizationPolicySpec, EgressNetwork,
EgressNetworkSpec, HttpLocalRateLimitPolicy, HttpRoute, HttpRouteSpec, LocalTargetRef,
MeshTLSAuthentication, MeshTLSAuthenticationSpec, NamespacedTargetRef, Network,
NetworkAuthentication, NetworkAuthenticationSpec, RateLimitPolicySpec, Server,
ServerAuthorization, ServerAuthorizationSpec, ServerSpec,
};
use anyhow::{anyhow, bail, ensure, Context, Result};
use futures::future;
use hyper::{body::Buf, http, Body, Request, Response};
use k8s_openapi::api::core::v1::{Namespace, ServiceAccount};
use kube::{core::DynamicObject, Resource, ResourceExt};
use linkerd_policy_controller_core as core;
use linkerd_policy_controller_k8s_api::gateway::{self as k8s_gateway_api, GrpcRoute};
use linkerd_policy_controller_k8s_index::{self as index, outbound::index as outbound_index};
use serde::de::DeserializeOwned;
use std::{collections::BTreeMap, task};
use thiserror::Error;
use tracing::{debug, info, trace, warn};
#[derive(Clone)]
pub struct Admission {
client: kube::Client,
}
#[derive(Debug, Error)]
pub enum Error {
#[error("failed to read request body: {0}")]
Request(#[from] hyper::Error),
#[error("failed to encode json response: {0}")]
Json(#[from] serde_json::Error),
}
type Review = kube::core::admission::AdmissionReview<DynamicObject>;
type AdmissionRequest = kube::core::admission::AdmissionRequest<DynamicObject>;
type AdmissionResponse = kube::core::admission::AdmissionResponse;
type AdmissionReview = kube::core::admission::AdmissionReview<DynamicObject>;
#[async_trait::async_trait]
trait Validate<T> {
async fn validate(
self,
ns: &str,
name: &str,
annotations: &BTreeMap<String, String>,
spec: T,
) -> Result<()>;
}
// === impl AdmissionService ===
impl hyper::service::Service<Request<Body>> for Admission {
type Response = Response<Body>;
type Error = Error;
type Future = future::BoxFuture<'static, Result<Response<Body>, Error>>;
fn poll_ready(&mut self, _cx: &mut task::Context<'_>) -> task::Poll<Result<(), Error>> {
task::Poll::Ready(Ok(()))
}
fn call(&mut self, req: Request<Body>) -> Self::Future {
trace!(?req);
if req.method() != http::Method::POST || req.uri().path() != "/" {
return Box::pin(future::ok(
Response::builder()
.status(http::StatusCode::NOT_FOUND)
.body(Body::empty())
.expect("not found response must be valid"),
));
}
let admission = self.clone();
Box::pin(async move {
use http_body::Body as _;
let bytes = req.into_body().collect().await?.aggregate();
let review: Review = match serde_json::from_reader(bytes.reader()) {
Ok(review) => review,
Err(error) => {
warn!(%error, "Failed to parse request body");
return json_response(AdmissionResponse::invalid(error).into_review());
}
};
trace!(?review);
let rsp = match review.try_into() {
Ok(req) => {
debug!(?req);
admission.admit(req).await
}
Err(error) => {
warn!(%error, "Invalid admission request");
AdmissionResponse::invalid(error)
}
};
debug!(?rsp);
json_response(rsp.into_review())
})
}
}
impl Admission {
pub fn new(client: kube::Client) -> Self {
Self { client }
}
async fn admit(self, req: AdmissionRequest) -> AdmissionResponse {
if is_kind::<AuthorizationPolicy>(&req) {
return self.admit_spec::<AuthorizationPolicySpec>(req).await;
}
if is_kind::<MeshTLSAuthentication>(&req) {
return self.admit_spec::<MeshTLSAuthenticationSpec>(req).await;
}
if is_kind::<NetworkAuthentication>(&req) {
return self.admit_spec::<NetworkAuthenticationSpec>(req).await;
}
if is_kind::<Server>(&req) {
return self.admit_spec::<ServerSpec>(req).await;
};
if is_kind::<ServerAuthorization>(&req) {
return self.admit_spec::<ServerAuthorizationSpec>(req).await;
};
if is_kind::<HttpRoute>(&req) {
return self.admit_spec::<HttpRouteSpec>(req).await;
}
if is_kind::<EgressNetwork>(&req) {
return self.admit_spec::<EgressNetworkSpec>(req).await;
}
if is_kind::<k8s_gateway_api::HttpRoute>(&req) {
return self.admit_spec::<k8s_gateway_api::HttpRouteSpec>(req).await;
}
if is_kind::<k8s_gateway_api::GrpcRoute>(&req) {
return self.admit_spec::<k8s_gateway_api::GrpcRouteSpec>(req).await;
}
if is_kind::<k8s_gateway_api::TlsRoute>(&req) {
return self.admit_spec::<k8s_gateway_api::TlsRouteSpec>(req).await;
}
if is_kind::<k8s_gateway_api::TcpRoute>(&req) {
return self.admit_spec::<k8s_gateway_api::TcpRouteSpec>(req).await;
}
if is_kind::<HttpLocalRateLimitPolicy>(&req) {
return self.admit_spec::<RateLimitPolicySpec>(req).await;
}
AdmissionResponse::invalid(format_args!(
"unsupported resource type: {}.{}.{}",
req.kind.group, req.kind.version, req.kind.kind
))
}
async fn admit_spec<T>(self, req: AdmissionRequest) -> AdmissionResponse
where
T: DeserializeOwned,
Self: Validate<T>,
{
let rsp = AdmissionResponse::from(&req);
let kind = req.kind.kind.clone();
let (obj, spec) = match parse_spec::<T>(req) {
Ok(spec) => spec,
Err(error) => {
info!(%error, "Failed to parse {} spec", kind);
return rsp.deny(error);
}
};
let ns = obj.namespace().unwrap_or_default();
let name = obj.name_any();
let annotations = obj.annotations();
if let Err(error) = self.validate(&ns, &name, annotations, spec).await {
info!(%error, %ns, %name, %kind, "Denied");
return rsp.deny(error);
}
rsp
}
}
fn is_kind<T>(req: &AdmissionRequest) -> bool
where
T: Resource,
T::DynamicType: Default,
{
let dt = Default::default();
req.kind.group.eq_ignore_ascii_case(&T::group(&dt))
&& req.kind.kind.eq_ignore_ascii_case(&T::kind(&dt))
}
fn json_response(rsp: AdmissionReview) -> Result<Response<Body>, Error> {
let bytes = serde_json::to_vec(&rsp)?;
Ok(Response::builder()
.status(http::StatusCode::OK)
.header(http::header::CONTENT_TYPE, "application/json")
.body(Body::from(bytes))
.expect("admission review response must be valid"))
}
fn parse_spec<T: DeserializeOwned>(req: AdmissionRequest) -> Result<(DynamicObject, T)> {
let obj = req
.object
.ok_or_else(|| anyhow!("admission request missing 'object"))?;
let spec = {
let data = obj
.data
.get("spec")
.cloned()
.ok_or_else(|| anyhow!("admission request missing 'spec'"))?;
serde_json::from_value(data)?
};
Ok((obj, spec))
}
/// Validates the target of an `AuthorizationPolicy`.
fn validate_policy_target(ns: &str, tgt: &LocalTargetRef) -> Result<()> {
if tgt.targets_kind::<Server>() {
return Ok(());
}
if tgt.targets_kind::<HttpRoute>() {
return Ok(());
}
if tgt.targets_kind::<GrpcRoute>() {
return Ok(());
}
if tgt.targets_kind::<Namespace>() {
if tgt.name != ns {
bail!("cannot target another namespace: {}", tgt.name);
}
return Ok(());
}
bail!("invalid targetRef kind: {}", tgt.canonical_kind());
}
#[async_trait::async_trait]
impl Validate<AuthorizationPolicySpec> for Admission {
async fn validate(
self,
ns: &str,
_name: &str,
_annotations: &BTreeMap<String, String>,
spec: AuthorizationPolicySpec,
) -> Result<()> {
validate_policy_target(ns, &spec.target_ref)?;
let mtls_authns_count = spec
.required_authentication_refs
.iter()
.filter(|authn| authn.targets_kind::<MeshTLSAuthentication>())
.count();
if mtls_authns_count > 1 {
bail!("only a single MeshTLSAuthentication may be set");
}
let sa_authns_count = spec
.required_authentication_refs
.iter()
.filter(|authn| authn.targets_kind::<ServiceAccount>())
.count();
if sa_authns_count > 1 {
bail!("only a single ServiceAccount may be set");
}
if mtls_authns_count + sa_authns_count > 1 {
bail!("a MeshTLSAuthentication and ServiceAccount may not be set together");
}
let net_authns_count = spec
.required_authentication_refs
.iter()
.filter(|authn| authn.targets_kind::<NetworkAuthentication>())
.count();
if net_authns_count > 1 {
bail!("only a single NetworkAuthentication may be set");
}
if mtls_authns_count + sa_authns_count + net_authns_count
< spec.required_authentication_refs.len()
{
let kinds = spec
.required_authentication_refs
.iter()
.filter(|authn| {
!authn.targets_kind::<MeshTLSAuthentication>()
&& !authn.targets_kind::<NetworkAuthentication>()
&& !authn.targets_kind::<ServiceAccount>()
})
.map(|authn| authn.canonical_kind())
.collect::<Vec<_>>();
bail!("unsupported authentication kind(s): {}", kinds.join(", "));
}
// Confirm that the index will be able to read this spec.
index::authorization_policy::validate(spec)?;
Ok(())
}
}
fn validate_identity_ref(id: &NamespacedTargetRef) -> Result<()> {
if id.targets_kind::<ServiceAccount>() {
return Ok(());
}
if id.targets_kind::<Namespace>() {
if id.namespace.is_some() {
bail!("Namespace identity_ref is cluster-scoped and cannot have a namespace");
}
return Ok(());
}
bail!("invalid identity target kind: {}", id.canonical_kind());
}
#[async_trait::async_trait]
impl Validate<MeshTLSAuthenticationSpec> for Admission {
async fn validate(
self,
_ns: &str,
_name: &str,
_annotations: &BTreeMap<String, String>,
spec: MeshTLSAuthenticationSpec,
) -> Result<()> {
for id in spec.identities.iter().flatten() {
if let Err(err) = validation::validate_identity(id) {
bail!("id {} is invalid: {}", id, err);
}
}
for id in spec.identity_refs.iter().flatten() {
validate_identity_ref(id)?;
}
Ok(())
}
}
#[async_trait::async_trait]
impl Validate<ServerSpec> for Admission {
/// Checks that `spec` doesn't select the same pod/ports as other existing Servers, and that
/// `accessPolicy` contains a valid value
//
// TODO(ver) this isn't rigorous about detecting servers that select the same port if one port
// specifies a numeric port and the other specifies the port's name.
async fn validate(
self,
ns: &str,
name: &str,
_annotations: &BTreeMap<String, String>,
spec: ServerSpec,
) -> Result<()> {
// Since we can't ensure that the local index is up-to-date with the API server (i.e.
// updates may be delayed), we issue an API request to get the latest state of servers in
// the namespace.
let servers = kube::Api::<Server>::namespaced(self.client, ns)
.list(&kube::api::ListParams::default())
.await?;
for server in servers.items.into_iter() {
let server_name = server.name_unchecked();
if server_name != name
&& server.spec.port == spec.port
&& Self::overlaps(&server.spec.selector, &spec.selector)
{
let server_ns = server.namespace();
let server_ns = server_ns.as_deref().unwrap_or("default");
bail!(
"Server spec '{server_ns}/{server_name}' already defines a policy \
for port {}, and selects pods that would be selected by this Server",
server.spec.port,
);
}
}
if let Some(policy) = spec.access_policy {
policy
.parse::<index::DefaultPolicy>()
.map_err(|err| anyhow!("Invalid 'accessPolicy' field: {err}"))?;
}
Ok(())
}
}
impl Admission {
/// Detects whether two pod selectors can select the same pod
//
// TODO(ver) We can probably detect overlapping selectors more effectively. For
// example, if `left` selects pods with 'foo=bar' and `right` selects pods with
// 'foo', we should indicate the selectors overlap. It's a bit tricky to work
// through all of the cases though, so we'll just punt for now.
fn overlaps(left: &Selector, right: &Selector) -> bool {
match (left, right) {
(Selector::Pod(ps_left), Selector::Pod(ps_right)) => {
if ps_left.selects_all() || ps_right.selects_all() {
return true;
}
}
(Selector::ExternalWorkload(et_left), Selector::ExternalWorkload(et_right)) => {
if et_left.selects_all() || et_right.selects_all() {
return true;
}
}
(_, _) => return false,
}
left == right
}
}
#[async_trait::async_trait]
impl Validate<NetworkAuthenticationSpec> for Admission {
async fn validate(
self,
_ns: &str,
_name: &str,
_annotations: &BTreeMap<String, String>,
spec: NetworkAuthenticationSpec,
) -> Result<()> {
if spec.networks.is_empty() {
bail!("at least one network must be specified");
}
validate_networks(spec.networks)
}
}
#[async_trait::async_trait]
impl Validate<EgressNetworkSpec> for Admission {
async fn validate(
self,
_ns: &str,
_name: &str,
_annotations: &BTreeMap<String, String>,
spec: EgressNetworkSpec,
) -> Result<()> {
if let Some(networks) = spec.networks {
if networks.is_empty() {
bail!("at least one network must be specified");
}
return validate_networks(networks);
}
Ok(())
}
}
fn validate_networks(networks: Vec<Network>) -> Result<()> {
for net in networks.into_iter() {
for except in net.except.into_iter().flatten() {
if except.contains(&net.cidr) {
bail!(
"cidr '{}' is completely negated by exception '{}'",
net.cidr,
except
);
}
if !net.cidr.contains(&except) {
bail!(
"cidr '{}' does not include exception '{}'",
net.cidr,
except
);
}
}
}
Ok(())
}
#[async_trait::async_trait]
impl Validate<ServerAuthorizationSpec> for Admission {
async fn validate(
self,
_ns: &str,
_name: &str,
_annotations: &BTreeMap<String, String>,
spec: ServerAuthorizationSpec,
) -> Result<()> {
if let Some(mtls) = spec.client.mesh_tls.as_ref() {
if spec.client.unauthenticated {
bail!("`unauthenticated` must be false if `mesh_tls` is specified");
}
if mtls.unauthenticated_tls {
let ids = mtls.identities.as_ref().map(|ids| ids.len()).unwrap_or(0);
let sas = mtls
.service_accounts
.as_ref()
.map(|sas| sas.len())
.unwrap_or(0);
if ids + sas > 0 {
bail!("`unauthenticatedTLS` be false if any `identities` or `service_accounts` is specified");
}
}
}
for net in spec.client.networks.into_iter().flatten() {
for except in net.except.into_iter().flatten() {
if except.contains(&net.cidr) {
bail!(
"cidr '{}' is completely negated by exception '{}'",
net.cidr,
except
);
}
if !net.cidr.contains(&except) {
bail!(
"cidr '{}' does not include exception '{}'",
net.cidr,
except
);
}
}
}
Ok(())
}
}
use index::routes::http as http_route;
fn validate_match(
httproute::HttpRouteMatch {
path,
headers,
query_params,
method,
}: httproute::HttpRouteMatch,
) -> Result<()> {
let _ = path.map(index::routes::http::path_match).transpose()?;
let _ = method
.as_deref()
.map(core::routes::Method::try_from)
.transpose()?;
for q in query_params.into_iter().flatten() {
index::routes::http::query_param_match(q)?;
}
for h in headers.into_iter().flatten() {
index::routes::http::header_match(h)?;
}
Ok(())
}
#[async_trait::async_trait]
impl Validate<HttpRouteSpec> for Admission {
async fn validate(
self,
_ns: &str,
_name: &str,
annotations: &BTreeMap<String, String>,
spec: HttpRouteSpec,
) -> Result<()> {
for parent in spec.inner.parent_refs.iter().flatten() {
validate_parent_ref_port_requirements(parent)?;
}
if spec
.inner
.parent_refs
.iter()
.flatten()
.any(outbound_index::is_parent_service_or_egress_network)
{
index::outbound::index::http::parse_http_retry(annotations)?;
index::outbound::index::parse_accrual_config(annotations)?;
index::outbound::index::parse_timeouts(annotations)?;
}
fn validate_filter(filter: httproute::HttpRouteFilter) -> Result<()> {
match filter {
httproute::HttpRouteFilter::RequestHeaderModifier {
request_header_modifier,
} => index::routes::http::header_modifier(request_header_modifier).map(|_| ()),
httproute::HttpRouteFilter::ResponseHeaderModifier {
response_header_modifier,
} => index::routes::http::header_modifier(response_header_modifier).map(|_| ()),
httproute::HttpRouteFilter::RequestRedirect { request_redirect } => {
index::routes::http::req_redirect(request_redirect).map(|_| ())
}
}
}
fn validate_timeouts(timeouts: httproute::HttpRouteTimeouts) -> Result<()> {
use std::time::Duration;
if let Some(t) = timeouts.backend_request {
ensure!(
!t.is_negative(),
"backendRequest timeout must not be negative"
);
}
if let Some(t) = timeouts.request {
ensure!(!t.is_negative(), "request timeout must not be negative");
}
if let (Some(req), Some(backend_req)) = (timeouts.request, timeouts.backend_request) {
ensure!(
Duration::from(req) >= Duration::from(backend_req),
"backendRequest timeout ({backend_req}) must not be greater than request timeout ({req})"
);
}
Ok(())
}
// Validate the rules in this spec.
// This is essentially equivalent to the indexer's conversion function
// from `HttpRouteSpec` to `InboundRouteBinding`, except that we don't
// actually allocate stuff in order to return an `InboundRouteBinding`.
for httproute::HttpRouteRule {
filters,
matches,
timeouts,
..
} in spec.rules.into_iter().flatten()
{
for m in matches.into_iter().flatten() {
validate_match(m)?;
}
for f in filters.into_iter().flatten() {
validate_filter(f)?;
}
if let Some(timeouts) = timeouts {
validate_timeouts(timeouts)?;
}
}
Ok(())
}
}
fn validate_backend_if_service(br: &k8s_gateway_api::BackendObjectReference) -> Result<()> {
let is_service = matches!(br.group.as_deref(), Some("core") | Some("") | None)
&& matches!(br.kind.as_deref(), Some("Service") | None);
// If the backend reference is a Service, it must have a port. If it is not
// a Service, then we have to admit it for interoperability with other
// controllers.
if is_service && matches!(br.port, None | Some(0)) {
bail!("cannot reference a Service without a port");
}
Ok(())
}
#[async_trait::async_trait]
impl Validate<k8s_gateway_api::HttpRouteSpec> for Admission {
async fn validate(
self,
_ns: &str,
_name: &str,
annotations: &BTreeMap<String, String>,
spec: k8s_gateway_api::HttpRouteSpec,
) -> Result<()> {
for parent in spec.inner.parent_refs.iter().flatten() {
validate_parent_ref_port_requirements(parent)?;
}
if spec
.inner
.parent_refs
.iter()
.flatten()
.any(outbound_index::is_parent_service_or_egress_network)
{
outbound_index::http::parse_http_retry(annotations)?;
outbound_index::parse_accrual_config(annotations)?;
outbound_index::parse_timeouts(annotations)?;
}
fn validate_filter(filter: k8s_gateway_api::HttpRouteFilter) -> Result<()> {
match filter {
k8s_gateway_api::HttpRouteFilter::RequestHeaderModifier {
request_header_modifier,
} => index::routes::http::header_modifier(request_header_modifier).map(|_| ()),
k8s_gateway_api::HttpRouteFilter::ResponseHeaderModifier {
response_header_modifier,
} => index::routes::http::header_modifier(response_header_modifier).map(|_| ()),
k8s_gateway_api::HttpRouteFilter::RequestRedirect { request_redirect } => {
index::routes::http::req_redirect(request_redirect).map(|_| ())
}
k8s_gateway_api::HttpRouteFilter::RequestMirror { .. } => Ok(()),
k8s_gateway_api::HttpRouteFilter::URLRewrite { .. } => Ok(()),
k8s_gateway_api::HttpRouteFilter::ExtensionRef { .. } => Ok(()),
}
}
// Validate the rules in this spec.
// This is essentially equivalent to the indexer's conversion function
// from `HttpRouteSpec` to `InboundRouteBinding`, except that we don't
// actually allocate stuff in order to return an `InboundRouteBinding`.
for k8s_gateway_api::HttpRouteRule {
filters,
matches,
backend_refs,
} in spec.rules.into_iter().flatten()
{
for m in matches.into_iter().flatten() {
validate_match(m)?;
}
for f in filters.into_iter().flatten() {
validate_filter(f)?;
}
for br in backend_refs
.iter()
.flatten()
.filter_map(|br| br.backend_ref.as_ref())
{
validate_backend_if_service(&br.inner).context("invalid backendRef")?;
}
}
Ok(())
}
}
#[async_trait::async_trait]
impl Validate<k8s_gateway_api::GrpcRouteSpec> for Admission {
async fn validate(
self,
_ns: &str,
_name: &str,
annotations: &BTreeMap<String, String>,
spec: k8s_gateway_api::GrpcRouteSpec,
) -> Result<()> {
for parent in spec.inner.parent_refs.iter().flatten() {
validate_parent_ref_port_requirements(parent)?;
}
if spec
.inner
.parent_refs
.iter()
.flatten()
.any(outbound_index::is_parent_service_or_egress_network)
{
outbound_index::grpc::parse_grpc_retry(annotations)?;
outbound_index::parse_accrual_config(annotations)?;
outbound_index::parse_timeouts(annotations)?;
}
fn validate_filter(filter: k8s_gateway_api::GrpcRouteFilter) -> Result<()> {
match filter {
k8s_gateway_api::GrpcRouteFilter::RequestHeaderModifier {
request_header_modifier,
} => http_route::header_modifier(request_header_modifier).map(|_| ()),
k8s_gateway_api::GrpcRouteFilter::ResponseHeaderModifier {
response_header_modifier,
} => http_route::header_modifier(response_header_modifier).map(|_| ()),
k8s_gateway_api::GrpcRouteFilter::RequestMirror { .. } => Ok(()),
k8s_gateway_api::GrpcRouteFilter::ExtensionRef { .. } => Ok(()),
}
}
fn validate_match_rule(
k8s_gateway_api::GrpcRouteMatch { method, headers }: k8s_gateway_api::GrpcRouteMatch,
) -> Result<()> {
if let Some(method_match) = method {
let (method_name, service_name) = match method_match {
k8s_gateway_api::GrpcMethodMatch::Exact { method, service } => {
(method, service)
}
k8s_gateway_api::GrpcMethodMatch::RegularExpression { method, service } => {
(method, service)
}
};
if method_name.as_deref().map(str::is_empty).unwrap_or(true)
&& service_name.as_deref().map(str::is_empty).unwrap_or(true)
{
bail!("at least one of GrpcMethodMatch.Service and GrpcMethodMatch.Method MUST be a non-empty string")
}
}
for rule in headers.into_iter().flatten() {
http_route::header_match(rule)?;
}
Ok(())
}
// Validate the rules in this spec.
// This is essentially just a check to ensure that none
// of the rules are improperly constructed (e.g. include
// a `GrpcMethodMatch` rule where neither `method.method`
// nor `method.service` actually contain a value)
for k8s_gateway_api::GrpcRouteRule {
filters,
matches,
backend_refs,
} in spec.rules.into_iter().flatten()
{
for rule in matches.into_iter().flatten() {
validate_match_rule(rule)?;
}
for filter in filters.into_iter().flatten() {
validate_filter(filter)?;
}
for br in backend_refs.iter().flatten() {
validate_backend_if_service(&br.inner).context("invalid backendRef")?;
}
}
Ok(())
}
}
#[async_trait::async_trait]
impl Validate<k8s_gateway_api::TlsRouteSpec> for Admission {
async fn validate(
self,
_ns: &str,
_name: &str,
_annotations: &BTreeMap<String, String>,
spec: k8s_gateway_api::TlsRouteSpec,
) -> Result<()> {
for parent in spec.inner.parent_refs.iter().flatten() {
validate_parent_ref_port_requirements(parent)?;
}
if spec.rules.len() != 1 {
bail!("TlsRoute supports a single rule only")
}
Ok(())
}
}
#[async_trait::async_trait]
impl Validate<k8s_gateway_api::TcpRouteSpec> for Admission {
async fn validate(
self,
_ns: &str,
_name: &str,
_annotations: &BTreeMap<String, String>,
spec: k8s_gateway_api::TcpRouteSpec,
) -> Result<()> {
for parent in spec.inner.parent_refs.iter().flatten() {
validate_parent_ref_port_requirements(parent)?;
}
if spec.rules.len() != 1 {
bail!("TcpRoute supports a single rule only")
}
Ok(())
}
}
fn validate_parent_ref_port_requirements(parent: &k8s_gateway_api::ParentReference) -> Result<()> {
if index::outbound::index::is_parent_egress_network(parent) && parent.port.is_none() {
bail!("cannot target an EgressNetwork without specifying a port");
}
Ok(())
}
#[async_trait::async_trait]
impl Validate<RateLimitPolicySpec> for Admission {
async fn validate(
self,
_ns: &str,
_name: &str,
_annotations: &BTreeMap<String, String>,
spec: RateLimitPolicySpec,
) -> Result<()> {
if !spec.target_ref.targets_kind::<Server>() {
bail!(
"invalid targetRef kind: {}",
spec.target_ref.canonical_kind()
);
}
if let Some(total) = spec.total {
if total.requests_per_second == 0 {
bail!("total.requestsPerSecond must be greater than 0");
}
if let Some(ref identity) = spec.identity {
if identity.requests_per_second > total.requests_per_second {
bail!("identity.requestsPerSecond must be less than or equal to total.requestsPerSecond");
}
}
for ovr in spec.overrides.clone().unwrap_or_default().iter() {
if ovr.requests_per_second > total.requests_per_second {
bail!("override.requestsPerSecond must be less than or equal to total.requestsPerSecond");
}
}
}
if let Some(identity) = spec.identity {
if identity.requests_per_second == 0 {
bail!("identity.requestsPerSecond must be greater than 0");
}
}
for ovr in spec.overrides.unwrap_or_default().iter() {
if ovr.requests_per_second == 0 {
bail!("override.requestsPerSecond must be greater than 0");
}
for target_ref in ovr.client_refs.iter() {
if !target_ref.targets_kind::<ServiceAccount>() {
bail!("overrides.clientRefs must target a ServiceAccount");
}
}
}
Ok(())
}
}