我正在尝试为我的应用程序构建docker映像,但是由于ENTRYPOINT执行失败,因此无法基于该映像运行容器:
User.Name@pc-name MINGW64 ~
$ docker run some-repository.com/application-name:latest
/bin/sh: line 0: [: missing `]'
有我的Dockerfile:
FROM some-repository.com/openjdk:11.0.5-jre-slim as build
FROM some-repository.com/rhel7-atomic
COPY --from=build /usr/local/openjdk-11 jx/
LABEL Team="some-team"
LABEL AppVersion=1111
RUN mkdir -p id
COPY application-name-1.6.17-SNAPSHOT.jar id
EXPOSE 26000
ENTRYPOINT [ "sh", "-c", "exec echo hello \$JAVA_OPTS \
world"]
有docker inspect
的结果:
"Cmd": [
"/bin/sh",
"-c",
"#(nop) ",
"ENTRYPOINT [\"/bin/sh\" \"-c\" \"[ \\\"sh\\\", \\\"-c\\\", \\\"exec echo hello \\\\$JAVA_OPTS world\\\"]\"]"
],
"ArgsEscaped": true,
"Entrypoint": [
"/bin/sh",
"-c",
"[ \"sh\", \"-c\", \"exec echo hello \\$JAVA_OPTS world\"]"
]
好像ENTRYPOINT命令被错误地插值,并且在命令中添加了[
字符。
为什么会出现此问题,我该如何解决?
答案 0 :(得分:2)
删除$
前面的转义符,这是json中的无效转义符,当字符串不解析为json时,它将解析为传递给shell的字符串。
ENTRYPOINT [ "sh", "-c", "exec echo hello $JAVA_OPTS \
world"]
如果您想让echo回显以打印$
,而不是让sh
扩展变量,那么您需要两次转义来转义转义字符,以便json将传递单个{ {1}}到正在运行的命令:
\