Update tianon/gosu Docker tag to v1.20 (#4364)

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
Co-authored-by: Geoff Bourne <988985+itzg@users.noreply.github.com>

.github/workflows/build.yml

@@ -94,25 +94,25 @@ jobs:
             platforms: linux/amd64,linux/arm/v7,linux/arm64
             mcVersion: 1.16.5
             # Pin version for pre-Java 17
-            mcHelperVersion: 1.51.5-java8
+            mcHelperVersion: 1.51.6-java8
         # JAVA 11
           - variant: java11
             baseImage: adoptopenjdk:11-jre-hotspot
             platforms: linux/amd64,linux/arm/v7,linux/arm64
             mcVersion: 1.16.4
             # Pin version for pre-Java 17
-            mcHelperVersion: 1.51.5-java8
+            mcHelperVersion: 1.51.6-java8
         # JAVA 8: NOTE: Unable to go past 8u312 because of Forge dependencies
           - variant: java8
             baseImage: eclipse-temurin:8-jre
             platforms: linux/amd64,linux/arm/v7,linux/arm64
             mcVersion: 1.12.2
-            mcHelperVersion: 1.51.5-java8
+            mcHelperVersion: 1.51.6-java8
           - variant: java8-jdk
             baseImage: eclipse-temurin:8-jdk
             platforms: linux/amd64,linux/arm64
             mcVersion: 1.12.2
-            mcHelperVersion: 1.51.5-java8
+            mcHelperVersion: 1.51.6-java8
     env:
       # Assume they line up, but when forked change to your Docker Hub username
       DOCKER_HUB_ORG: ${{ github.repository_owner }}

.github/workflows/verify-pr.yml

@@ -62,7 +62,7 @@ jobs:
             # For GLIBC_2.34 support
             knockdRepoOrg: Metalcape/knock
             # Pin version for Java 8, be sure to also set in build.yml
-            mcHelperVersion: 1.51.5-java8
+            mcHelperVersion: 1.51.6-java8
     env:
       IMAGE_TO_TEST: ${{ github.repository_owner }}/minecraft-server:test-${{ matrix.variant }}-${{ github.run_id }}
     runs-on: ubuntu-22.04

Dockerfile

@@ -17,7 +17,7 @@ ARG KNOCKD_REPO_ORG=Metalcape/knock
 RUN --mount=target=/build,source=build \
     TARGET=${TARGETARCH}${TARGETVARIANT} \
     /build/run.sh install-packages
-COPY --from=tianon/gosu:1.19 /gosu /usr/local/bin/
+COPY --from=tianon/gosu:1.20 /gosu /usr/local/bin/
 
 RUN --mount=target=/build,source=build \
     /build/run.sh setup-user
@@ -28,18 +28,18 @@ ARG APPS_REV=1
 ARG GITHUB_BASEURL=https://github.com
 
 # renovate: datasource=github-releases packageName=itzg/easy-add
-ARG EASY_ADD_VERSION=0.8.18
+ARG EASY_ADD_VERSION=0.8.19
 ADD ${GITHUB_BASEURL}/itzg/easy-add/releases/download/${EASY_ADD_VERSION}/easy-add_${TARGETOS}_${TARGETARCH}${TARGETVARIANT} /usr/bin/easy-add
 RUN chmod +x /usr/bin/easy-add
 
 # renovate: datasource=github-releases packageName=itzg/restify
-ARG RESTIFY_VERSION=1.7.20
+ARG RESTIFY_VERSION=1.7.21
 RUN easy-add --var os=${TARGETOS} --var arch=${TARGETARCH}${TARGETVARIANT} \
   --var version=${RESTIFY_VERSION} --var app=restify --file {{.app}} \
   --from ${GITHUB_BASEURL}/itzg/{{.app}}/releases/download/{{.version}}/{{.app}}_{{.version}}_{{.os}}_{{.arch}}.tar.gz
 
 # renovate: datasource=github-releases packageName=itzg/rcon-cli
-ARG RCON_CLI_VERSION=1.7.8
+ARG RCON_CLI_VERSION=1.7.9
 RUN easy-add --var os=${TARGETOS} --var arch=${TARGETARCH}${TARGETVARIANT} \
   --var version=${RCON_CLI_VERSION} --var app=rcon-cli --file {{.app}} \
   --from ${GITHUB_BASEURL}/itzg/{{.app}}/releases/download/{{.version}}/{{.app}}_{{.version}}_{{.os}}_{{.arch}}.tar.gz
@@ -51,13 +51,13 @@ RUN easy-add --var os=${TARGETOS} --var arch=${TARGETARCH}${TARGETVARIANT} \
   --from ${GITHUB_BASEURL}/itzg/{{.app}}/releases/download/{{.version}}/{{.app}}_{{.version}}_{{.os}}_{{.arch}}.tar.gz
 
 # renovate: datasource=github-releases packageName=itzg/mc-server-runner
-ARG MC_SERVER_RUNNER_VERSION=1.16.1
+ARG MC_SERVER_RUNNER_VERSION=1.16.2
 RUN easy-add --var os=${TARGETOS} --var arch=${TARGETARCH}${TARGETVARIANT} \
   --var version=${MC_SERVER_RUNNER_VERSION} --var app=mc-server-runner --file {{.app}} \
   --from ${GITHUB_BASEURL}/itzg/{{.app}}/releases/download/{{.version}}/{{.app}}_{{.version}}_{{.os}}_{{.arch}}.tar.gz
 
 # renovate: datasource=github-releases packageName=itzg/mc-image-helper versioning=loose
-ARG MC_HELPER_VERSION=1.74.0
+ARG MC_HELPER_VERSION=1.74.2
 ARG MC_HELPER_BASE_URL=${GITHUB_BASEURL}/itzg/mc-image-helper/releases/download/${MC_HELPER_VERSION}
 # used for cache busting local copy of mc-image-helper
 ARG MC_HELPER_REV=1

docs/configuration/jvm-options.md

@@ -89,6 +89,33 @@ you can use
   JVM_DD_OPTS: fml.queryResult=confirm,name=value
 ```
 
+## Java and JVM Agents
+
+Java agents, such as [authlib-injector](https://github.com/yushijinhun/authlib-injector), can be loaded into the server by setting `JAVA_AGENTS`, and native JVM agents by setting `JVM_AGENTS`. Like [the `MODS` / `PLUGINS` variables](../mods-and-plugins/index.md#modsplugins-list), both are a comma or newline delimited list of
+
+- URL of an agent file
+- container path to an agent file
+- container path to a directory containing agent jar files for `JAVA_AGENTS`, or `.so` files for `JVM_AGENTS`
+
+The agents are copied into `/data/agents/java` and `/data/agents/jvm`, and each one is passed to the JVM as `-javaagent:<file>` or `-agentpath:<file>`, in file name order.
+
+!!! example
+
+    ```yaml
+        environment:
+          JAVA_AGENTS: |
+            https://www.example.com/agents/agent.jar
+            /agents
+    ```
+
+!!! note "Auto-removal"
+
+    Entries that are removed from the `JAVA_AGENTS` or `JVM_AGENTS` list will be automatically removed from the agents directory, so they are no longer loaded.
+
+!!! note "Agent options"
+
+    An agent that needs options, such as `-javaagent:agent.jar=options`, can still be passed with `JVM_OPTS` instead.
+
 ## Enable Remote JMX for Profiling
 
 To enable remote JMX, such as for profiling with VisualVM or JMC, set the environment variable `ENABLE_JMX` to "true", set `JMX_HOST` to the IP/host running the Docker container, and add a port forwarding of TCP port 7091, such as:

docs/misc/contributing/development.md

@@ -21,6 +21,40 @@ docker compose -f compose-dev.yml run --rm -it [-e key=value]  mc-dev
 
     To speed up the development cycle, it is recommended to set `SETUP_ONLY` to `true` as part of the run command above.
 
+## Testing changes
+
+Most changes should be covered by a test under `tests/setuponlytests`. Each test scenario needs its own `compose.yml` or `docker-compose.yml`, which defines the container configuration and inputs for that case. These tests run server setup with `SETUP_ONLY=true`, so they can verify configuration, downloads, and generated files without starting Minecraft.
+
+A scenario can include a `require.sh` to check whether its prerequisites are available in the test environment, such as a required environment variable. It runs before the scenario; a non-zero exit status skips that test. For example, this skips a test when `CF_API_KEY` is not set:
+
+```bash title="require.sh"
+[[ -n "${CF_API_KEY:-}" ]] || exit 1
+```
+
+Since `require.sh` runs on the host, it sees the variables provided by the CI workflow. These are the ones typically checked:
+
+- `EXTENDED_TESTS`: opt-in flag for slower or network-heavy scenarios; the CI workflows don't set it, so those scenarios only run when it is exported locally
+- `CF_API_KEY`: CurseForge API key, which is only available to trusted runs
+- `MINECRAFT_VERSION`: the Minecraft version of the CI matrix entry, such as `latest` or `1.12.2`
+- `VARIANT`: the image variant of the CI matrix entry, such as `java21-alpine`
+- `GH_TOKEN`: GitHub token used for API calls that would otherwise be rate limited
+
+A `require_inside.sh` works the same way, but runs inside a container of the image under test, which is useful when a test depends on the image's contents or Java variant. Checking for JVM runtime files is a good use of it. For example, this skips a test that needs the JDWP agent, which some Java variants such as GraalVM do not include:
+
+```bash title="require_inside.sh"
+[[ -f /opt/java/openjdk/lib/libjdwp.so ]] || exit 1
+```
+
+Add a `verify.sh` to assert that setup produced the expected files or contents. It runs only after setup succeeds, with the scenario's `data` directory mounted at `/data`; a non-zero exit status fails the test. See the [`mc-image-helper assert` command documentation](https://github.com/itzg/mc-image-helper#assert) for available assertions. For example, use it to check that setup downloaded an expected mod:
+
+```bash title="verify.sh"
+mc-image-helper assert fileExists "/data/mods/ExplorersCompass-1.16.5-1.1.2-forge.jar"
+```
+
+Run the test suite with `tests/test.sh`. For a focused setup-only check, run `bash tests/setuponlytests/test.sh <scenario>` from the repository root, where `<scenario>` is the directory name under `tests/setuponlytests` (for example, `defaults`). The pull request workflow runs the suite, so prefer setup-only tests for new scenarios.
+
+Tests under `tests/fulltests` start Minecraft and wait for the monitor to confirm that the server is healthy. Keep this suite limited to maintained tests that provide essential full-startup coverage; adding every scenario there would increase pull request validation time.
+
 ## Building the image with a new release of a tool
 
 In this exapmle, let's say that [mc-image-helper](https://github.com/itzg/mc-image-helper) has been [released](https://github.com/itzg/mc-image-helper/releases) at 1.56.0, but the corresponding changes in the image [scripts](https://github.com/itzg/docker-minecraft-server/tree/23205471db9814cff9c6602361dbc6cdd6c4230a/scripts) need to be tested against that version while updating [the Dockerfile](https://github.com/itzg/docker-minecraft-server/blob/23205471db9814cff9c6602361dbc6cdd6c4230a/Dockerfile#L58).

docs/requirements.txt

@@ -4,7 +4,7 @@ deepmerge==3.0.1
 ghp-import==2.1.0
 griffe==2.3.2
 Jinja2==3.1.6
-Markdown==3.11
+Markdown==3.11.1
 MarkupSafe==3.0.4
 mergedeep==1.3.4
 mkdocs==1.6.1
@@ -14,12 +14,12 @@ mkdocstrings==1.0.7
 mkdocstrings-python==2.0.9
 packaging==26.3
 pathspec==1.1.1
-platformdirs==4.13.0
+platformdirs==4.13.4
 Pygments==2.21.0
-pymdown-extensions==12.2
+pymdown-extensions==12.3
 python-dateutil==2.9.0.post0
 PyYAML==6.0.3
 pyyaml_env_tag==1.1
 six==1.17.0
 watchdog==6.0.0
-zensical==0.0.69
+zensical==0.0.71

docs/variables.md

@@ -147,6 +147,18 @@ alternatively, you can mount: <code>/etc/localtime:/etc/localtime:ro
             <td><code></code></td>
             <td>⬜️</td>
         </tr>
+        <tr>
+            <td><code>JAVA_AGENTS</code></td>
+            <td>Comma or newline delimited list of Java agent jar URLs, container paths to jars, or container paths to directories of jars, which are loaded with <code>-javaagent</code></td>
+            <td><code></code></td>
+            <td>⬜️</td>
+        </tr>
+        <tr>
+            <td><code>JVM_AGENTS</code></td>
+            <td>Comma or newline delimited list of native JVM agent URLs, container paths to agents, or container paths to directories of <code>.so</code> agents, which are loaded with <code>-agentpath</code></td>
+            <td><code></code></td>
+            <td>⬜️</td>
+        </tr>
         <tr>
             <td><code>EXTRA_ARGS</code></td>
             <td>Arguments that would usually be passed to the jar file (those which are written after the filename)</td>

files/cf-exclude-include.json

@@ -60,7 +60,6 @@
     "entity-texture-features-fabric",
     "entityculling",
     "equipment-compare",
-    "essential-mod",
     "euphoria-patches",
     "extreme-sound-muffler",
     "ezzoom",

scripts/start-deployBukkitSpigot

@@ -67,7 +67,6 @@ function buildSpigotFromSource {
 function downloadSpigot {
   local match
   local getBukkitBaseUrl="https://getbukkit.org/download/"
-  local getBukkitSpigotUrl="${getBukkitBaseUrl}spigot" 
   case "$TYPE" in
     *BUKKIT|*bukkit)
       match="CraftBukkit"
@@ -82,8 +81,9 @@ function downloadSpigot {
   esac
 
   if [[ ${VERSION^^} = LATEST ]]; then
-    if ! downloadUrl=$(restify "${getBukkitBaseUrl}/${getbukkitFlavor}" --id='downloadr' | jq -r '.[0] | .href '); then
-      logError "Failed to retrieve latest version from ${getBukkitSpigotUrl} -- site might be down"
+    if ! downloadUrl=$(curl -fsSL "https://getbukkit.org/api/jars" \
+        | jq -er --arg f "$getbukkitFlavor" '.[$f][0].downloadUrl | "https://getbukkit.org" + .'); then
+      logError "Failed to retrieve latest version from ${getBukkitBaseUrl}${getbukkitFlavor} -- site might be down"
       exit 1
     fi
   fi

scripts/start-finalExec

@@ -125,6 +125,39 @@ elif versionLessThan 1.18.1; then
   fi
 fi
 
+function addAgents() {
+  local agents=$1 outDir=$2 glob=$3 option=$4
+
+  mkdir -p "$outDir"
+  if ! mc-image-helper mcopy \
+    --glob="$glob" \
+    --scope=var-list \
+    --to="$outDir" \
+    "$agents"; then
+    logError "Failed to get agents from $agents"
+    exit 1
+  fi
+
+  # The manifest lists the files that the list resolved to, also in subdirectories, as for destination<source entries
+  local manifest="$outDir/.var-list-manifest.json"
+  if [ -f "$manifest" ]; then
+    while read -r agent; do
+      JVM_OPTS="${JVM_OPTS} ${option}:${outDir}/${agent}"
+    done < <(jq -r '.files[]' "$manifest" | sort)
+  fi
+}
+
+if isFamily NATIVE; then
+  : # Native server, so no JVM to load agents into
+else
+  if [[ -v JVM_AGENTS ]]; then
+    addAgents "$JVM_AGENTS" /data/agents/jvm '*.so' -agentpath
+  fi
+  if [[ -v JAVA_AGENTS ]]; then
+    addAgents "$JAVA_AGENTS" /data/agents/java '*.jar' -javaagent
+  fi
+fi
+
 # Set up log4j2 configuration with templating support
 LOGFILE="${SERVER_DIR}/log4j2.xml"
 if isFamily NATIVE; then

scripts/start-setupModpack

@@ -313,6 +313,10 @@ function handleModrinthProjects() {
       loader=${HYBRIDTYPE}
     elif isFamily VANILLA; then
       loader=datapack
+    elif isType NEOFORGE; then
+      loader=neoforge
+    elif isFamily FORGE; then
+      loader=forge
     else
       loader="${TYPE,,}"
     fi

tests/fulltests/test.sh

@@ -28,8 +28,8 @@ fullMinecraftUpTest(){
 }
 
 # go through each folder in fulltests and run fullbuilds
-files=$(ls */docker-compose.yml)
-for file in $files; do
+readarray -t files < <(find . -maxdepth 2 -mindepth 2 \( -name compose.yml -o -name docker-compose.yml \) | sort)
+for file in "${files[@]}"; do
 
     echo "Starting Tests on $(dirname "$file")"
     if ! fullMinecraftUpTest "$file"; then

tests/setuponlytests/agents/docker-compose.yml

@@ -0,0 +1,14 @@
+services:
+  mc:
+    restart: "no"
+    image: ${IMAGE_TO_TEST:-itzg/minecraft-server}
+    environment:
+      EULA: "TRUE"
+      SETUP_ONLY: "TRUE"
+      VERSION: ${MINECRAFT_VERSION:-LATEST}
+      # The image's own directory holds a Java agent among other files
+      JAVA_AGENTS: /image
+      # The JDK's debugger is a native JVM agent
+      JVM_AGENTS: /opt/java/openjdk/lib/libjdwp.so
+    volumes:
+      - ./data:/data

tests/setuponlytests/agents/require_inside.sh

@@ -0,0 +1 @@
+[[ -f /opt/java/openjdk/lib/libjdwp.so ]] || exit 1

tests/setuponlytests/agents/verify.sh

@@ -0,0 +1,3 @@
+mc-image-helper assert fileExists agents/java/Log4jPatcher.jar
+mc-image-helper assert fileNotExists agents/java/server.properties
+mc-image-helper assert fileExists agents/jvm/libjdwp.so

tests/setuponlytests/modrinth-neoforge/docker-compose.yml

@@ -0,0 +1,11 @@
+services:
+  mc:
+    image: ${IMAGE_TO_TEST:-itzg/minecraft-server}
+    environment:
+      EULA: "true"
+      SETUP_ONLY: "true"
+      TYPE: NEOFORGE
+      VERSION: 1.21.1
+      MODRINTH_PROJECTS: storagedrawers
+    volumes:
+      - ./data:/data

tests/setuponlytests/modrinth-neoforge/verify.sh

@@ -0,0 +1 @@
+mc-image-helper assert fileExists "mods/StorageDrawers-neoforge-*.jar"

tests/setuponlytests/test.sh

@@ -41,6 +41,16 @@ setupOnlyMinecraftTest(){
     fi
   fi
 
+  if [ -f require_inside.sh ]; then
+    # require_inside.sh scripts run inside the image under test to check for things like a particular
+    # JVM file or feature. A non-zero exit status indicates the test should be skipped.
+    if ! docker run --rm --entrypoint bash -v "${PWD}/require_inside.sh":/require_inside:ro "${IMAGE_TO_TEST}" -e /require_inside; then
+      echo "${folder} SKIP (require_inside)"
+      cd ..
+      return 0
+    fi
+  fi
+
   # false positive since it's used in delta calculations below
   # shellcheck disable=SC2034
   start=$(date +%s)
@@ -71,7 +81,7 @@ image=""
 
 # Go through each folder in setuponly and test setups
 if (( $# == 0 )); then
-  readarray -t folders < <(find . -maxdepth 2 -mindepth 2 -name docker-compose.yml -exec dirname "{}" \;)
+  readarray -t folders < <(find . -maxdepth 2 -mindepth 2 \( -name compose.yml -o -name docker-compose.yml \) -exec dirname "{}" \; | sort -u)
   foldersList=("${folders[@]}")
   image=" using $IMAGE_TO_TEST"
 fi