* Add log traces to Nomulus service on GKE
Add request-scope log traces to Nomulus on GKE which, unlike
AppEngine and Cloud Run etc, does not generate traces for hosted
applications. This change only affects the GKE image. It does not affect
the AppEngine services.
Log traces are added to Nomulus-generated logs in request-processing
threads. Forked threads are not covered yet. The single relevant use
case (TimeLimiter) will be addressed in a followup PR.
The main change is in the logging configuration:
* Use gcp-cloud-logging's LoggingHandler
* Add gcp-cloud-logging's TraceLoggingEnhancer to the handler.
* Set a thread-local trace id through the TraceLoggingEnhancer in
ServletBase on request's entry and clear it on completion.
Also removed an unused class (`RequestLogId`).
* CR
* CR
Chose the default transaction manager based on RegistryEnvironment. This
makes it possible to run nomulus on Jetty locally. Tested with the
following:
```bash
./gradle :jetty:run -Penvironment=alpha
curl http://localhost:8080/beta.app
```
The docker image is also updated to take an argument that specifies the
environment. It runs locally as well but the container doesn't get
access to locally stored credentials, so it fails to initialize the
transaction manager.
This PR makes the runtime of most of our workload Java 21.
1. App Engine. Java 21 is in GA and it supports Java EE 8. I had to add
an environmental variable so that we don't get an
AppEngineCredentails by default (we have been using
ComputeEngineCredentials for a couple of years). The uprade to Java
21 runtime changed a system property that controls how jetty logging
works, which also control if AppEngineCredential is return. Tested by
deploying to alpha.
2. Proxy base image upgradedd to Java 21 (distroless still doesn't
support Java 21 and it looks like Temurin is the way to go
b/306728455). Tested by deploying to alpha.
3. Nomulus tool image upgrade to Temurin 21 as well. Tested locally.
4. Beam pipeline base image upgrade to Java 21. The JAVA21 flag is not
supported by gcloud yet, but specifying the image URL directly works
(and is supported). Tested by running in alpha.
5. Jetty base image upgraded to Java 21. Tested locally.
This PR creates a unified RegistryServlet that will serve all
non-console traffic. It also creates a jetty subproject that allows one
to run Nomulus on top of a standard Jetty 12 runtime.
`./gradlew :jetty:stage` will create a jetty base folder at
`jetty/build/jetty-base` where one is able spin up a local Nomulus server
by running the following command inside the folder:
```bash
java -jar ${JETTY_HOME}/start.jar
```
`JETTY_HOME` is a folder where the [Jetty runtime](https://repo1.maven.org/maven2/org/eclipse/jetty/jetty-home/12.0.6/jetty-home-12.0.6.zip) is located.
This PR also adds a Gradle task to create a Nomulus image based on the
official Jetty image:
```bash
./gradlew :jetty:buildNomulusImage
```
