Docker Passing an argument Docker Entrypoint with entrypoint.sh

Question

I tried to pass an argument to my docker entry point , but it fails , these are steps i followed

Docker Build Command : docker build -t "DBDNS" --build-arg  db=sample

In Dockerfile

ARG db
ENV database ${db}
ENTRYPOINT ["/docker/entrypoint.sh", ${db}]

Error for this bash: 1: bash: [/var/www/html/.docker/entrypoint.sh,: not found

Actually file exists and passing an argument for entrypoint.sh causing issue. Any clues for this

-----------ENTRYPOINT---------------------
#!/usr/bin/env bash

echo "Entrypoint stuff"
echo "----------------"
echo "NEW APP DB CLONE FROM  $1"
echo "sites/files permission changes"
echo "--------------------------------------"

Can you provide the ADD command where you add the entrypoint.sh file to the image? — yamenk, Aug 25 '17 at 11:32
@yamenK yeah i have done it already . without passing argument in ENTRYPOINT ["/docker/entrypoint.sh", ${db}] It works . but if i add the argument then only error occurs. — Raza Rafaideen, Aug 25 '17 at 11:35

score 5 · Accepted Answer · edited Aug 25 '17 at 12:45

5

Entrypoint cannot have a a variable. You can either move it to CMD or directly access it in docker-entrypoint.sh

ARG db
ENV database ${db}
ENTRYPOINT ["/docker/entrypoint.sh"]
CMD ["${db}"]


-----------ENTRYPOINT---------------------
#!/usr/bin/env bash

echo "Entrypoint stuff"
echo "----------------"
echo "NEW APP DB CLONE FROM  $1 or same as $database"
echo "sites/files permission changes"
echo "--------------------------------------"

Even if you don't use CMD, $database will get you the value you need

edited Aug 25 '17 at 12:45

Raza Rafaideen

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answered Aug 25 '17 at 12:13

Tarun Lalwani

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It worked. thanks alot man. – Raza Rafaideen Aug 25 '17 at 12:38

Docker Passing an argument Docker Entrypoint with entrypoint.sh

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