Cloud Foundry java buildpack - java: 找不到命令

Question

Cloud Foundry 的新手，使用 java buildpack 推送 java 应用程序的 zip 分发。它正确检测到启动脚本，但是当启动脚本到达需要启动 jvm 的位置时，我收到此错误：

bash: java: command not found

显然 'java' 在脚本执行期间不在 shell 的路径上，而且我在任何地方都找不到 JAVA_HOME 定义。

用于启动 java 应用程序的路径是什么？它在哪里记录？

误报

非常感谢@DanielMikusa 指出 JAVA_HOME 确实已设置，即使在使用的 buildpack 的相当旧的版本中也是如此。这里没什么可看的。

编辑#1

我发现当启动脚本启动时，$PWD/.buildpack-java/oracle_jre 中有一个 jre。但是，这不可能是我期望用来指定 JAVA_HOME 路径的内容，对吗？这个位置似乎完全取决于 java 构建包的当前实现。似乎 jre 的 bin 文件夹应该在启动脚本的进程路径中，或者应该有一个环境变量或在运行启动脚本之前建立的其他配置，这样我就可以使用该值来查找 java可执行文件。

编辑 #2

以下是 cf 推送操作期间的输出：

PS E:\dev\hoobajoob\myproject\build\distributions> cf push -p .\my-service-1.0.0.zip my-service
Using manifest file E:\dev\hoobajoob\myproject\build\distributions\manifest.yml

Creating app my-service in org DEV / space dev as chefhoobajoob@github.com...
OK

Creating route my-service.cflab.dctmlabs.com...
OK

Binding my-service.cflab.dctmlabs.com to my-service...
OK

Uploading my-service...
Uploading app files from: C:\Users\hoobajoob\AppData\Local\Temp\unzipped-app384867239
Uploading 9.7M, 9390 files
Done uploading
OK

Starting app my-service in org DEV / space dev as chefhoobajoob@github.com...
Downloading oracle_buildpack_151...
Downloading binary_buildpack...
Downloading go_buildpack...
Downloading python_buildpack...
Downloading java-buildpack-offline-v3-19-2...
Downloaded java-buildpack-offline-v3-19-2
Downloading java-buildpack-offline-4-7...
...<more downloads>

Creating container
Successfully created container
Downloading app package...
Downloaded app package (53.1M)
Staging...
-----> Java Buildpack Version: v3.5.1 (offline) | https://github.com/cloudfoundry/java-buildpack.git#3abc3db
-----> Downloading Oracle JRE 1.8.0_112 from http://127.0.0.1/oracle-jre/trusty/x86_64/jre-8u112-linux-x64.tar.gz (found
 in cache)
       Expanding Oracle JRE to .java-buildpack/oracle_jre (2.3s)
-----> Downloading Open JDK Like Memory Calculator 2.0.1_RELEASE from https://download.run.pivotal.io/memory-calculator/
trusty/x86_64/memory-calculator-2.0.1_RELEASE.tar.gz (found in cache)
       Memory Settings: -Xms2304M -XX:MetaspaceSize=314572K -Xss1M -Xmx2304M -XX:MaxMetaspaceSize=314572K
-----> Downloading Spring Auto Reconfiguration 1.10.0_RELEASE from https://download.run.pivotal.io/auto-reconfiguration/
auto-reconfiguration-1.10.0_RELEASE.jar (found in cache)
Exit status 0
Staging complete
Uploading droplet, build artifacts cache...
Uploading droplet...
Uploading build artifacts cache...
Uploaded build artifacts cache (108B)
Uploaded droplet (120.5M)
Uploading complete
Destroying container
Successfully destroyed container

0 of 1 instances running, 1 starting
0 of 1 instances running, 1 starting
0 of 1 instances running, 1 starting
0 of 1 instances running, 1 starting
0 of 1 instances running, 1 starting
0 of 1 instances running, 1 starting
0 of 1 instances running, 1 starting
0 of 1 instances running, 1 starting
1 of 1 instances running

App started


OK
App my-service was started using this command `CALCULATED_MEMORY=$($PWD/.java-buildpack/oracle_jre/bin/java-buildpack-memory-calculator-2.0.1_RELEASE -memorySizes=metaspace:64m.. -memoryWeights=heap:75,metaspace:10,native:10,stack:5 -memoryInitials=heap:100%,metaspace:100% -totMemory=$MEMORY_LIMIT) &&  JAVA_HOME=$PWD/.java-buildpack/oracle_jre JAVA_OPTS="-Djava.io.tmpdir=$TMPDIR -XX:OnOutOfMemoryError=$PWD/.java-buildpack/oracle_jre/bin/killjava.sh $CALCULATED_MEMORY" exec $PWD/my-service-1.0.0/bin/launch`

Answer 1

写下上面的评论以防其他人遇到这个问题。

我们查看了暂存的完整输出和 Java buildpack 生成的启动命令。
我们可以从 Java 构建包生成的启动命令中看出，启动命令负责设置 JAVA_HOME。
如果您依赖 Java buildpack 为您的 dist-zip 样式应用程序创建启动命令，它将 "do the right thing" 和 add the JAVA_HOME environment variable 包含启动命令的正确路径.
如果您需要创建自定义启动命令，您有责任正确设置 JAVA_HOME。
如果您 cf ssh 进入由 Java buildpack 启动的应用程序，则您有责任设置 JAVA_HOME.

Cloud Foundry java buildpack - java: 找不到命令

Cloud Foundry java buildpack - java: command not found

java

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