## Build a Docker Image for FastAPI { #build-a-docker-image-for-fastapi }

Okay, let's build something now! 🚀

I'll show you how to build a **Docker image** for FastAPI **from scratch**, based on the **official Python** image.

This is what you would want to do in **most cases**, for example:

* Using **Kubernetes** or similar tools

---

"_私は **FastAPI** にワクワクしています。 めちゃくちゃ楽しいです！_"

<div style="text-align: right; margin-right: 10%;">Brian Okken - <strong>[Python Bytes](https://pythonbytes.fm/episodes/show/123/time-to-right-the-py-wrongs?time_in_sec=855) podcast host</strong> <a href="https://x.com/brianokken/status/1112220079972728832"><small>(ref)</small></a></div>

---

- New flag `--show-hidden-metrics-for-version` in kube-apiserver can be used to show all hidden metrics that deprecated in the previous minor release. ([#84292](https://github.com/kubernetes/kubernetes/pull/84292), [@RainbowMango](https://github.com/RainbowMango))

				break
			}
		}

		if requestedVersions > 0 && requestedVersions == nVersions {
			merged = append(merged, versions[0]...)
			break
		}
	}

	// Sanity check. Enable if duplicates show up.
	if false {
		found := make(map[[16]byte]struct{})
		for _, ver := range merged {
			if _, ok := found[ver.header.VersionID]; ok {
				panic("found dupe")
			}

 * weak references.
 *
 * <p><strong>Performance</strong>
 *
 * <p>The extra bookkeeping done by cycle detecting locks comes at some cost to performance.
 * Benchmarks (as of December 2011) show that:
 *
 * <ul>
 *   <li>for an unnested {@code lock()} and {@code unlock()}, a cycle detecting lock takes 38ns as
 *       opposed to the 24ns taken by a plain lock.

- Unallowed label values will show up as "unexpected" in scheduler metrics. ([#126762](https://github.com/kubernetes/kubernetes/pull/126762), [@richabanker](https://github.com/richabanker)) [SIG Instrumentation and Scheduling]

Elasticsearch uses the Gradle wrapper for its build. You can execute Gradle
using the wrapper via the `gradlew` script on Unix systems or `gradlew.bat`
script on Windows in the root of the repository. The examples below show the
usage on Unix.

We support development in IntelliJ versions IntelliJ 2020.1 and
onwards and Eclipse 2020-3 and onwards.

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 *   }
 * } else {
 *   // do other things since the monitor was not available
 * }
 * }
 *
 * <h2>Comparison with {@code synchronized} and {@code ReentrantLock}</h2>
 *
 * <p>The following examples show a simple threadsafe holder expressed using {@code synchronized},
 * {@link ReentrantLock}, and {@code Monitor}.
 *
 * <h3>{@code synchronized}</h3>
 *

    public static final String LABELS_result_collapsed = "{labels.result_collapsed}";

    /** The key of the message: Show Login Link */
    public static final String LABELS_login_link = "{labels.login_link}";

    /** The key of the message: Show Thumbnail */
    public static final String LABELS_THUMBNAIL = "{labels.thumbnail}";

    /** The key of the message: Ignore Failure Types */