Pulling Docker image from private protected repository within bash script - docker

Question

I am trying to write a bash script to automatize the setup of a multi-containers environment.
Each container is built from images pulled from a private protected repository.
The problem is that when the script calls for docker-compose up for the first time, access to the repository is denied, like if it does not know I have properly done docker login before running the script.
If I docker pull an image manually, that very image is no longer a problem when the script tries to build its container. But when it has to docker pull on its own from a Dockerfile definition, it gets access denied.
Considering that I would like this script to be portable to other devs' environments, how can I get it to be able to access the repository using the credentials each dev will have already set on its computer with docker login?

Answer 1

You can do something like:
#!/bin/bash
cat ~/pwd.txt | docker login <servername> -u <username> --password-stdin
docker pull
This reads the password from pwd.txt and logs in to the specified server.
In case you have multiple servers you want to log in you can try:
#!/bin/bash
serverlist="server1.com server2.com"
for server in $serverlist; do
cat ~/${server}_pwd.txt | docker login $server -u <username> --password-stdin
done
docker pull
This reads the passwords from files like server1.com_pwd.txt.