从docker文件调用时，keytool错误：java.io.FileNotFoundException（权限被拒绝）

Question

我正在尝试使用我的Docker文件在Docker映像中安装证书

ENV JAVA_HOME /usr/lib/jvm/java-8-openjdk-amd64

COPY app-module/src/main/resources/certificates/A.crt /etc/ssl/certs/
COPY app-module/src/main/resources/certificates/B.crt /etc/ssl/certs/

RUN $JAVA_HOME/bin/keytool -import -keystore $JAVA_HOME/jre/lib/security/cacerts -storepass changeit -noprompt -file /etc/ssl/certs/A.crt -alias A
RUN $JAVA_HOME/bin/keytool -import -keystore $JAVA_HOME/jre/lib/security/cacerts -storepass changeit -noprompt -file /etc/ssl/certs/B.crt -alias B

我得到错误

keytool error: java.io.FileNotFoundException: /usr/lib/jvm/java-8-openjdk-amd64/jre/lib/security/cacerts (Permission denied)

我发现的其他答案建议以root / administrator模式运行上述命令。但是，我正在Dockerfile中运行这些命令。我如何克服这个错误？

Answer 1

docker 中的默认用户是 root。我相信出于安全目的，您的组织已将其设置为 root 以外的用户。您需要更改为 root 用户，然后更改回您的组织设置的任何用户。

ENV JAVA_HOME /usr/lib/jvm/java-8-openjdk-amd64

COPY app-module/src/main/resources/certificates/A.crt /etc/ssl/certs/
COPY app-module/src/main/resources/certificates/B.crt /etc/ssl/certs/

#change to user root to install certificates
USER root
RUN $JAVA_HOME/bin/keytool -import -keystore $JAVA_HOME/jre/lib/security/cacerts -storepass changeit -noprompt -file /etc/ssl/certs/A.crt -alias A
RUN $JAVA_HOME/bin/keytool -import -keystore $JAVA_HOME/jre/lib/security/cacerts -storepass changeit -noprompt -file /etc/ssl/certs/B.crt -alias B

#change to user oldUser to comply with organisation standards
USER oldUser