D:\source\guns\guns-admin>mvn compile jib:build
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building guns-admin 1.0.0
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-resources-plugin:3.0.1:resources (default-resources) @ guns-admin ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 181 resources
[INFO] Copying 4 resources
[INFO] Copying 10 resources
[INFO]
[INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ guns-admin ---
[INFO] Nothing to compile - all classes are up to date
[INFO]
[INFO] --- jib-maven-plugin:0.9.8:build (default-cli) @ guns-admin ---
[WARNING] 'mainClass' is not a valid Java class : ${start-class}
[WARNING] Base image 'gcr.io/distroless/java' does not use a specific image digest - build may not be reproducible
[INFO]
[INFO] Containerizing application to XXXX.XXX.XX.XX:9981/spring/guns-admin:0.1...
[INFO]
[INFO] Retrieving registry credentials for XXXX.XXX.XX.XX:9981...
[INFO] Building classes layer...
[INFO] Building resources layer...
[INFO] Building dependencies layer...
[INFO] Getting base image gcr.io/distroless/java...
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 29.406 s
[INFO] Finished at: 2018-08-16T17:29:27+08:00
[INFO] Final Memory: 35M/321M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal com.google.cloud.tools:jib-maven-plugin:0.9.8:build (default-cli) on project guns-admin: Build image failed: Connect to gcr.io/108.177.125.82:443 timed out -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException
通过设置代理的方法还是没有解决
用了设置代理 set HTTP_PROXY=http://127.0.0.1:1080
根据 Build image failed #544 的描述，from 镜像改用openjdk:8-jre-alpine，在auth设置hub.docker.com账户信息。
由于我配置的私有镜像仓库没有设置https，所以设置<allowInsecureRegistries>true</allowInsecureRegistries>
再重新运行mvn compile jib:build，即可build成功了。
D:\source\guns\guns-admin>mvn compile jib:build
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building guns-admin 1.0.0
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-resources-plugin:3.0.1:resources (default-resources) @ guns-admin ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 181 resources
[INFO] Copying 4 resources
[INFO] Copying 10 resources
[INFO]
[INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ guns-admin ---
[INFO] Nothing to compile - all classes are up to date
[INFO]
[INFO] --- jib-maven-plugin:0.9.8:build (default-cli) @ guns-admin ---
[WARNING] 'mainClass' is not a valid Java class : ${start-class}
[INFO]
[INFO] Containerizing application to XXXX.XXX.XX.XX:9981/guns-admin:0.1...
[INFO]
[INFO] Retrieving registry credentials for XXXX.XXX.XX.XX:9981...
[INFO] Getting base image openjdk:8-jre-alpine...
[INFO] Building dependencies layer...
[INFO] Building classes layer...
[INFO] Building resources layer...
[WARNING] Failed to connect to https://XXXX.XXX.XX.XX:9981/v2/ over HTTPS. Attempting again with HTTP: http://XXXX.XXX.XX.XX:9981/v2/
[WARNING] Failed to connect to https://XXXX.XXX.XX.XX:9981/v2/guns-admin/blobs/sha256:0450804ad14e232495e648ac35e90c6ddb1ab5355ddbbe3dadfd77de1cd15af6 over HTTPS. Attempting again with HTTP: http://XXXX.XXX.XX.XX:9981/v2/guns-admin/blobs/sha256
:0450804ad14e232495e648ac35e90c6ddb1ab5355ddbbe3dadfd77de1cd15af6
[WARNING] Failed to connect to https://XXXX.XXX.XX.XX:9981/v2/guns-admin/blobs/sha256:01d060ececba83405757973c2f0c65c70eef1cac19f020f8f9e8b4d437d834d6 over HTTPS. Attempting again with HTTP: http://XXXX.XXX.XX.XX:9981/v2/guns-admin/blobs/sha256
:01d060ececba83405757973c2f0c65c70eef1cac19f020f8f9e8b4d437d834d6
[WARNING] Failed to connect to https://XXXX.XXX.XX.XX:9981/v2/guns-admin/blobs/uploads/ over HTTPS. Attempting again with HTTP: http://XXXX.XXX.XX.XX:9981/v2/guns-admin/blobs/uploads/
[WARNING] Failed to connect to https://XXXX.XXX.XX.XX:9981/v2/guns-admin/blobs/uploads/ over HTTPS. Attempting again with HTTP: http://XXXX.XXX.XX.XX:9981/v2/guns-admin/blobs/uploads/
[WARNING] Failed to connect to https://XXXX.XXX.XX.XX:9981/v2/guns-admin/blobs/sha256:ee8c19e4413e85cd4fc9f8c34870d66c1014d8294a6945e478d5ccd5cbdc088d over HTTPS. Attempting again with HTTP: http://XXXX.XXX.XX.XX:9981/v2/guns-admin/blobs/sha256
:ee8c19e4413e85cd4fc9f8c34870d66c1014d8294a6945e478d5ccd5cbdc088d
[WARNING] Failed to connect to https://XXXX.XXX.XX.XX:9981/v2/guns-admin/blobs/uploads/ over HTTPS. Attempting again with HTTP: http://XXXX.XXX.XX.XX:9981/v2/guns-admin/blobs/uploads/
[INFO] The base image requires auth. Trying again for openjdk:8-jre-alpine...
[INFO] Retrieving registry credentials for registry.hub.docker.com...
[INFO] Finalizing...
[WARNING] Failed to connect to https://XXXX.XXX.XX.XX:9981/v2/guns-admin/blobs/sha256:8e3ba11ec2a2b39ab372c60c16b421536e50e5ce64a0bc81765c2e38381bcff6 over HTTPS. Attempting again with HTTP: http://XXXX.XXX.XX.XX:9981/v2/guns-admin/blobs/sha256
:8e3ba11ec2a2b39ab372c60c16b421536e50e5ce64a0bc81765c2e38381bcff6
[WARNING] Failed to connect to https://XXXX.XXX.XX.XX:9981/v2/guns-admin/blobs/sha256:391a6a6b36513d84d55cbbe7e13bca7e92fbf257d910a5255f2b7bc9fcff4edf over HTTPS. Attempting again with HTTP: http://XXXX.XXX.XX.XX:9981/v2/guns-admin/blobs/sha256
:391a6a6b36513d84d55cbbe7e13bca7e92fbf257d910a5255f2b7bc9fcff4edf
[WARNING] Failed to connect to https://XXXX.XXX.XX.XX:9981/v2/guns-admin/blobs/sha256:311ad0da45338842480bf25c6e6b7bb133b7b8cf709c3470db171ec370da5539 over HTTPS. Attempting again with HTTP: http://XXXX.XXX.XX.XX:9981/v2/guns-admin/blobs/sha256
:311ad0da45338842480bf25c6e6b7bb133b7b8cf709c3470db171ec370da5539
[WARNING] Failed to connect to https://XXXX.XXX.XX.XX:9981/v2/guns-admin/blobs/uploads/ over HTTPS. Attempting again with HTTP: http://XXXX.XXX.XX.XX:9981/v2/guns-admin/blobs/uploads/
[WARNING] Failed to connect to https://XXXX.XXX.XX.XX:9981/v2/guns-admin/blobs/uploads/ over HTTPS. Attempting again with HTTP: http://XXXX.XXX.XX.XX:9981/v2/guns-admin/blobs/uploads/
[WARNING] Failed to connect to https://XXXX.XXX.XX.XX:9981/v2/guns-admin/blobs/uploads/ over HTTPS. Attempting again with HTTP: http://XXXX.XXX.XX.XX:9981/v2/guns-admin/blobs/uploads/
[WARNING] Failed to connect to https://XXXX.XXX.XX.XX:9981/v2/guns-admin/blobs/sha256:eb147fcb3225e019310856d267dfc7e5f25e4708d9f438ab6f3189ced773451f over HTTPS. Attempting again with HTTP: http://XXXX.XXX.XX.XX:9981/v2/guns-admin/blobs/sha256
:eb147fcb3225e019310856d267dfc7e5f25e4708d9f438ab6f3189ced773451f
[WARNING] Failed to connect to https://XXXX.XXX.XX.XX:9981/v2/guns-admin/blobs/uploads/ over HTTPS. Attempting again with HTTP: http://XXXX.XXX.XX.XX:9981/v2/guns-admin/blobs/uploads/
[WARNING] Failed to connect to https://XXXX.XXX.XX.XX:9981/v2/guns-admin/manifests/0.1 over HTTPS. Attempting again with HTTP: http://XXXX.XXX.XX.XX:9981/v2/guns-admin/manifests/0.1
[INFO]
[INFO] Container entrypoint set to [java, -cp, /app/libs/*:/app/resources/:/app/classes/, ${start-class}]
[INFO]
[INFO] Built and pushed image as ?[36mXXXX.XXX.XX.XX:9981/guns-admin:0.1?[0m
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 28.296 s
[INFO] Finished at: 2018-08-17T15:27:36+08:00
[INFO] Final Memory: 44M/330M
[INFO] ------------------------------------------------------------------------
私有镜像仓库中信息
要点小结：
1. 由于gcr.io被墙，gcr.io/distroless/java镜像不得到，建议用openjdk:8-jre-alpine代替
2. 如果私有镜像仓库没有启用https，设置allowInsecureRegistries参数为true
我的jib maven plugin配置如下
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