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refactor: new logger for get actor logs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,165 @@ | ||
| // Copyright (c) The Amphitheatre Authors. All rights reserved. | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| use std::collections::HashMap; | ||
|
|
||
| use axum::response::sse::Event; | ||
| use futures::AsyncBufReadExt; | ||
| use futures::StreamExt; | ||
| use futures::TryStreamExt; | ||
| use k8s_openapi::api::core::v1::ContainerStatus; | ||
| use k8s_openapi::api::core::v1::Pod; | ||
| use kube::api::LogParams; | ||
| use kube::runtime::watcher::Config; | ||
| use kube::runtime::{watcher, WatchStreamExt}; | ||
| use kube::Api; | ||
| use kube::ResourceExt; | ||
| use tokio::sync::mpsc::Sender; | ||
| use tokio::task::JoinHandle; | ||
| use tracing::{debug, error, info, warn}; | ||
| use uuid::Uuid; | ||
|
|
||
| pub struct Logger { | ||
| api: Api<Pod>, // The Kubernetes API client. | ||
| sender: Sender<Event>, // The sender of the log stream. | ||
| config: Config, // The configuration of watcher. | ||
| watches: HashMap<String, JoinHandle<()>>, // The map of watching containers. | ||
| } | ||
|
|
||
| impl Logger { | ||
| /// Creates a new logger. | ||
| pub fn new(client: kube::Client, sender: Sender<Event>, playbook: Uuid, actor: String) -> Self { | ||
| let api: Api<Pod> = Api::namespaced(client, &format!("amp-{playbook}")); | ||
| let label_selector = format!("amphitheatre.app/character={actor}"); | ||
| let config = Config::default().labels(&label_selector); | ||
|
|
||
| Self { api, sender, config, watches: HashMap::new() } | ||
| } | ||
|
|
||
| /// Starts the logger. | ||
| pub async fn start(&mut self) { | ||
| let watcher = watcher(self.api.clone(), self.config.clone()); | ||
| let mut watcher = watcher.touched_objects().boxed(); | ||
|
|
||
| while let Some(pod) = watcher.try_next().await.unwrap() { | ||
| let pod_name = pod.name_any(); | ||
| if let Some(status) = pod.status { | ||
| // Unsubscribe all the watches of the pod if pod is terminating. | ||
| // and then break the loop to exit the function. | ||
| if status.phase == Some("Terminating".into()) { | ||
| self.unsubscribe_all(&pod_name); | ||
| return; | ||
| } | ||
|
|
||
| self.watches(&pod_name, status.init_container_statuses).await; | ||
| self.watches(&pod_name, status.container_statuses).await; | ||
| } | ||
| } | ||
| } | ||
|
|
||
| /// Watches the containers of the pod. | ||
| async fn watches(&mut self, pod: &str, containers: Option<Vec<ContainerStatus>>) { | ||
| if containers.is_none() { | ||
| warn!("No container statuses found in pod {}.", pod); | ||
| return; | ||
| } | ||
|
|
||
| // Iterate the containers of the pod. | ||
| for container in containers.unwrap() { | ||
| if container.state.is_none() { | ||
| warn!("No state found in container {} of {}.", container.name, pod); | ||
| continue; | ||
| } | ||
| let state = container.state.unwrap(); | ||
|
|
||
| // If the container is running, then subscribe the log stream. | ||
| if state.running.is_some_and(|s| s.started_at.is_some()) { | ||
| let key = &format!("{}-{}", pod, container.name); | ||
| if self.watches.contains_key(key) { | ||
| debug!("Skip container {} of {} because it's watching.", &container.name, pod); | ||
| continue; | ||
| } | ||
| self.subscribe(pod, &container.name).await; | ||
| } | ||
|
|
||
| // If the container is terminated, then unsubscribe the log stream. | ||
| if state.terminated.is_some_and(|s| s.finished_at.is_some()) { | ||
| debug!("Container {} in {} has been terminated.", container.name, pod); | ||
| self.unsubscribe(pod, &container.name); | ||
| } | ||
| } | ||
| } | ||
|
|
||
| /// Subscribes the log stream of the container. | ||
| async fn subscribe(&mut self, pod: &str, container: &str) { | ||
| let key = format!("{}-{}", pod, container); | ||
|
|
||
| let api = self.api.clone(); | ||
| let sender = self.sender.clone(); | ||
| let container = container.to_string(); | ||
| let pod = pod.to_string(); | ||
|
|
||
| let task = tokio::spawn(async move { | ||
| Self::tail(api, sender, pod, container).await; | ||
| }); | ||
|
|
||
| self.watches.insert(key, task); | ||
| } | ||
|
|
||
| /// Tails the log stream of the container. | ||
| async fn tail(api: Api<Pod>, sender: Sender<Event>, pod: String, container: String) { | ||
| let params = LogParams { | ||
| container: Some(container.to_string()), | ||
| follow: true, | ||
| tail_lines: Some(100), | ||
| timestamps: true, | ||
| ..Default::default() | ||
| }; | ||
|
|
||
| match api.log_stream(&pod, ¶ms).await { | ||
| Ok(stream) => { | ||
| info!("Start to receive the log stream of container {} in {}...", container, pod); | ||
| let mut lines = stream.lines(); | ||
| while let Ok(Some(line)) = lines.try_next().await { | ||
| _ = sender.send(Event::default().data(line)).await; | ||
| } | ||
| } | ||
| Err(err) => { | ||
| let message = | ||
| format!("Some error occurred while log stream for container {} in {}: {}.", container, pod, err); | ||
| error!("{}", message); | ||
| _ = sender.send(Event::default().data(message)).await; | ||
| } | ||
| } | ||
| } | ||
|
|
||
| /// Unsubscribes all the log streams. | ||
| fn unsubscribe_all(&mut self, pod: &str) { | ||
| for (key, task) in self.watches.drain() { | ||
| if key.starts_with(pod) { | ||
| info!("Unsubscribe the log stream of container {} in {}.", key, pod); | ||
| task.abort(); | ||
| } | ||
| } | ||
| } | ||
|
|
||
| /// Unsubscribes the log stream of the container. | ||
| fn unsubscribe(&mut self, pod: &str, container: &str) { | ||
| let key = &format!("{}-{}", pod, container); | ||
| if let Some(task) = self.watches.remove(key) { | ||
| info!("Unsubscribe the log stream of container {} in {}.", container, pod); | ||
| task.abort(); | ||
| } | ||
| } | ||
| } |
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