My Dockerfile
FROM alpine:latest
WORKDIR /usr/src/app
COPY ./init.sh /usr/src/app
RUN chmod +x init.sh
CMD ["sh","-c","init.sh"]
Build goes OK
docker build . -t test
Sending build context to Docker daemon 3.072kB
Step 1/5 : FROM alpine:latest
---> e66264b98777
Step 2/5 : WORKDIR /usr/src/app
---> Running in 1ff4467854af
Removing intermediate container 1ff4467854af
---> 6b4f1fa4ca1c
Step 3/5 : COPY ./init.sh /usr/src/app
---> e61e55063baa
Step 4/5 : RUN chmod +x init.sh
---> Running in ae3724c0f595
Removing intermediate container ae3724c0f595
---> 3c2cd99a30b9
Step 5/5 : CMD ["sh","-c","init.sh"]
---> Running in 9df8c7d70e38
Removing intermediate container 9df8c7d70e38
---> bd9c9af6380d
Successfully built bd9c9af6380d
Successfully tagged test:latest
I got this
docker run -it test
sh: init.sh: not found
Why?
>Solution :
Use ./init.sh to execute the script, provided that the shell script has a proper shebang like #!/bin/sh on the top:
FROM alpine:latest
WORKDIR /usr/src/app
COPY ./init.sh /usr/src/app
RUN chmod +x init.sh
CMD ["sh", "-c", "./init.sh"]
Note that it’s actually not necessary, and can be shortened as CMD ./init.sh.