Dockerfile CMD - There can only be one.



Regardless of current or previously configure docker image, CMD can only be executed once.

For example, let's say you use image PARENT_IMAGE_DOCKER and it uses a CMD to build this image. If you build on top of PARENT_IMAGE_DOCKER  and call it CHILD_IMAGE_DOCKER, you are still stuck with running / configuring a single CMD.

Image builder needs to be careful. The work around for this is to use a script (mountdb.script) which gets called and the runs whatever scripts that PARENT_IMAGE_DOCKER requires.

You can see some samples here (Notice on line 36, I called .\start.ps1 - which is what the image used to run.



Comments

Post a Comment

Popular posts from this blog

The specified initialization vector (IV) does not match the block size for this algorithm

Image
If you're getting  exception when trying to assigned key to a symmetric key and getting error message below :- The specified initialization vector (IV) does not match the block size for this algorithm And your code probably look like something below :- Then you need to go into debug mode and start looking into the supported size for IV as shown in diagram below :- As you can see, IV is 16 bytes, so you need to provide 16 bytes. The same goes for Key field too, if you're adding anything to it. As long as you provide a valid key size, then we're good and you're code will be ready.
Read more