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pub mod agones;
use std::sync::Arc;
use futures::Stream;
use k8s_openapi::api::core::v1::ConfigMap;
use kube::runtime::watcher::Event;
use agones::GameServer;
use crate::endpoint::{Endpoint, Locality, LocalityEndpoints};
pub fn update_filters_from_configmap(
client: kube::Client,
namespace: impl AsRef<str>,
config: Arc<crate::Config>,
) -> impl Stream<Item = crate::Result<(), eyre::Error>> {
async_stream::stream! {
for await event in configmap_events(client, namespace) {
tracing::trace!("new configmap event");
let event = match event {
Ok(event) => event,
Err(error) => {
yield Err(error.into());
continue;
}
};
let configmap = match event {
Event::Applied(configmap) => configmap,
Event::Restarted(configmaps) => match configmaps.get(0) {
Some(configmap) => configmap.clone(),
None => {
yield Ok(());
continue;
},
},
Event::Deleted(_) => {
config.filters.remove();
yield Ok(());
continue;
}
};
let data = configmap.data.ok_or_else(|| eyre::eyre!("configmap data missing"))?;
let data = data.get("quilkin.yaml").ok_or_else(|| eyre::eyre!("quilkin.yaml property not found"))?;
let data: serde_json::Map<String, serde_json::Value> = serde_yaml::from_str(data)?;
if let Some(filters) = data
.get("filters")
.cloned()
.map(serde_json::from_value)
.transpose()?
{
config.filters.store(Arc::new(filters));
}
yield Ok(());
}
}
}
fn configmap_events(
client: kube::Client,
namespace: impl AsRef<str>,
) -> impl Stream<Item = Result<Event<ConfigMap>, kube::runtime::watcher::Error>> {
let config_namespace = namespace.as_ref();
let configmap: kube::Api<ConfigMap> = kube::Api::namespaced(client, config_namespace);
let config_writer = kube::runtime::reflector::store::Writer::<ConfigMap>::default();
let configmap_stream = kube::runtime::watcher(
configmap,
kube::runtime::watcher::Config::default().labels("quilkin.dev/configmap=true"),
);
kube::runtime::reflector(config_writer, configmap_stream)
}
fn gameserver_events(
client: kube::Client,
namespace: impl AsRef<str>,
) -> impl Stream<Item = Result<Event<GameServer>, kube::runtime::watcher::Error>> {
let gameservers_namespace = namespace.as_ref();
let gameservers: kube::Api<GameServer> = kube::Api::namespaced(client, gameservers_namespace);
let gs_writer = kube::runtime::reflector::store::Writer::<GameServer>::default();
let gameserver_stream = kube::runtime::watcher(gameservers, <_>::default());
kube::runtime::reflector(gs_writer, gameserver_stream)
}
pub fn update_endpoints_from_gameservers(
client: kube::Client,
namespace: impl AsRef<str>,
config: Arc<crate::Config>,
locality: Option<Locality>,
) -> impl Stream<Item = crate::Result<(), eyre::Error>> {
async_stream::stream! {
for await event in gameserver_events(client, namespace) {
match event? {
Event::Applied(server) => {
if !server.is_allocated() {
yield Ok(());
continue;
}
let endpoint = match Endpoint::try_from(server) {
Ok(endpoint) => endpoint,
Err(error) => {
tracing::warn!(%error, "received invalid gameserver to apply from k8s");
continue;
}
};
tracing::trace!(endpoint=%serde_json::to_value(&endpoint).unwrap(), "Adding endpoint");
match &locality {
Some(locality) => config
.clusters
.value()
.default_cluster_mut()
.insert((endpoint, locality.clone())),
None => config
.clusters
.value()
.default_cluster_mut()
.insert(endpoint),
};
tracing::trace!(clusters=%serde_json::to_value(&config.clusters).unwrap(), "current clusters");
}
Event::Restarted(servers) => {
let servers: Vec<_> = servers
.into_iter()
.filter(GameServer::is_allocated)
.map(Endpoint::try_from)
.filter_map(|result| {
match result {
Ok(endpoint) => Some(endpoint),
Err(error) => {
tracing::warn!(%error, "received invalid gameserver on restart from k8s");
None
}
}
})
.collect();
let endpoints = LocalityEndpoints::from((servers, locality.clone()));
tracing::trace!(?endpoints, "Restarting with endpoints");
config.clusters.value().insert_default(endpoints);
}
Event::Deleted(server) => {
let found = if let Some(endpoint) = server.endpoint() {
config.clusters.value().remove_endpoint(&endpoint)
} else {
config.clusters.value().remove_endpoint_if(|endpoint| {
endpoint.metadata.unknown.get("name") == server.metadata.name.clone().map(From::from).as_ref()
})
};
if found.is_none() {
tracing::warn!(
endpoint=%serde_json::to_value(server.endpoint()).unwrap(),
name=%serde_json::to_value(server.metadata.name).unwrap(),
"received unknown gameserver to delete from k8s"
);
}
}
};
config.apply_metrics();
yield Ok(());
}
}
}