[SOLVED] why yes command not working in git clone?

Issue

i am trying to run script that clone repository and then build it in my docker.

And it is a private repository so i have copied ssh keys in docker. but seems like below command does not work.

yes yes | git clone (ssh link to my private repository.)

When i manually tried to run script in my local system its showing the same.but it works fine for other commands.

I have access of repository as i can type yes and it works.

But i can't type yes in docker build.

Any help will be appreciated.

Solution

This is purely an ssh issue. When ssh is connecting to a host for the "first time",¹ it obtains a "host fingerprint" and prints it, then opens /dev/tty to interact with the human user so as to obtain a yes/no answer about whether it should continue connecting. You cannot defeat this by piping to its standard input.

Fortunately, ssh has about a billion options, including:

• the option to obtain the host fingerprint in advance, using ssh-keyscan, and
• the option to verify a host key via DNS.

The first is the one to use here: run ssh-keyscan and create a known_hosts file in the .ssh directory. Security considerations will tell you how careful to be about this (i.e., you must decide how paranoid to be).

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¹"First" is determined by whether there's a host key in your .ssh/known_hosts file. Since you're spinning up a Docker image that you then discard, every time is the first time. You could set up a docker image that has the file already in it, so that no time is the first time.

Answered By - torek

Answer Checked By - Terry (WPSolving Volunteer)