- The default Bootstrap Token created with `kubeadm init` v1.8 expires
 and is deleted after 24 hours by default to limit the exposure of the
 valuable credential. You can create a new Bootstrap Token with
 `kubeadm token create` or make the default token permanently valid by specifying
 `--token-ttl 0` to `kubeadm init`. The default token can later be deleted with
 `kubeadm token delete`.

---

## FastAPI 미니 다큐멘터리 { #fastapi-mini-documentary }

2025년 말에 공개된 [FastAPI 미니 다큐멘터리](https://www.youtube.com/watch?v=mpR8ngthqiE)가 있습니다. 온라인에서 시청할 수 있습니다:

<a href="https://www.youtube.com/watch?v=mpR8ngthqiE"><img src="https://fastapi.tiangolo.com/img/fastapi-documentary.jpg" alt="FastAPI Mini Documentary"></a>

## **Typer**, CLI를 위한 FastAPI { #typer-the-fastapi-of-clis }

- The flag `--experimental-patches` is now deprecated and will be removed in a future release. You can migrate to using the new flag `--patches`. Add a new field `{Init|Join}Configuration.patches.directory` that can be used for the same purpose. For `init` and `join` it is now recommended that you migrate to configure patches via `{Init|Join}Configuration.patches.directory`. For the time being, these flags can be mixed with `--config`, but that might change in the future. On a command line, the last...

## Changes since v1.3.0-beta.1

### Experimental Features

- Fixed a bug where init containers may fail to start due to a temporary container runtime failure. ([#127213](https://github.com/kubernetes/kubernetes/pull/127213), [@SergeyKanzhelev](https://github.com/SergeyKanzhelev)) [SIG Node]

    val trustManager =
      newTrustManager(
        keystoreType,
        emptyList(),
        emptyList(),
      )
    val sslContext = get().newSSLContext()
    sslContext.init(
      arrayOf<KeyManager>(x509KeyManager),
      arrayOf<TrustManager>(trustManager),
      SecureRandom(),
    )
    return sslContext.socketFactory
  }

     * If the analyzer settings index does not exist, it creates it with default settings and mappings.
     * It also loads analyzer names and field analyzer mappings.
     */
    public synchronized void init() {
        try {
            final IndicesExistsResponse response =
                    client.admin().indices().prepareExists(analyzerSettingsIndexName).execute().actionGet(settings.getIndicesTimeout());

如果你有**多个容器**，可能每个容器运行一个**单独进程**（例如在 **Kubernetes** 集群中），那么你可能希望使用一个**单独的容器**来执行**前置步骤**，在一个容器中运行一个进程，**在**启动那些复制的 worker 容器**之前**完成。

/// info | 信息

如果你使用 Kubernetes，这通常会是一个 [Init Container](https://kubernetes.io/docs/concepts/workloads/pods/init-containers/)。

///

如果在你的用例中，**并行多次**运行这些前置步骤没有问题（例如你不是在跑数据库迁移，而只是检查数据库是否就绪），那么你也可以把这些步骤放在每个容器中，在启动主进程之前执行。

### 单个容器 { #single-container }

 - Fix HPA when using init containers and CRI-O ([#90900](https://github.com/kubernetes/kubernetes/pull/90900), [@joelsmith](https://github.com/joelsmith)) [SIG Node]

     * Sets up the statistics logger and creates the cache for storing
     * statistics objects with the configured size and expiration settings.
     */
    @PostConstruct
    public void init() {
        statsLogger = LogManager.getLogger(loggerName);
        statsCache = CacheBuilder.newBuilder()
                .maximumSize(maxCacheSize)
                .expireAfterWrite(cacheExpireAfterWrite, TimeUnit.MILLISECONDS)