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Merge branch '2.2.x'

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Closes gh-19004
This commit is contained in:
Stephane Nicoll 2019-11-13 13:37:50 +01:00
commit d0c85506d1
1 changed files with 18 additions and 5 deletions
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23
spring-boot-project/spring-boot-docs/src/main/asciidoc/deployment.adoc
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@ -35,19 +35,32 @@ Once you have unpacked the jar file, you can also get an extra boost to startup
More efficient container images can also be created by copying the dependencies to the image as a separate layer from the application classes and resources (which normally change more frequently).
There is more than one way to achieve this layer separation.
For example, using a `Dockerfile` you could express it in this form (assuming the jar is already unpacked at `target/dependency`):
For example, using a `Dockerfile` you could express it in this form:
[indent=0]
----
FROM openjdk:8-jdk-alpine
FROM openjdk:8-jdk-alpine AS builder
WORKDIR target/dependency
ARG appjar
COPY ${appjar} app.jar
RUN jar -xf ./app.jar
FROM openjdk:8-jre-alpine
VOLUME /tmp
ARG DEPENDENCY=target/dependency
COPY ${DEPENDENCY}/BOOT-INF/lib /app/lib
COPY ${DEPENDENCY}/META-INF /app/META-INF
COPY ${DEPENDENCY}/BOOT-INF/classes /app
COPY --from=builder ${DEPENDENCY}/BOOT-INF/lib /app/lib
COPY --from=builder ${DEPENDENCY}/META-INF /app/META-INF
COPY --from=builder ${DEPENDENCY}/BOOT-INF/classes /app
ENTRYPOINT ["java","-cp","app:app/lib/*","com.example.MyApplication"]
----
Assuming the above `Dockerfile` is the current directory, your docker image can be built specifying the path to your application jar, as show in the following example:
[indent=0]
----
docker build --build-arg appjar=path/to/myapp.jar .
----
[[cloud-deployment]]