How to add additional command or additional package in k3os?

[kuddusrhce]

Hello Team,

We have created K3OS OS images from the packer and created a virtual machine and hosted them in a virtual environment. We are looking for a password reset option in the existing machine for rancher user to force to change password at first login. We haven't found any change and passwd command. Also, we have realized that passwd is linked to busybox command. It doesn't have passwd -e option? How to proceed further? Is there any way to add/install additional packages so that we can use either chage or passwd -e option? Please suggest.

[dweomer]

k3OS is not meant to be a traditionally multi-user operating system. The rancher user is all that is supported, the password for which is sourced from config.yaml at every boot. That said, I do not recommend the use of passwords but instead add ssh public keys to the rancher user profile (also supported via config,yaml).

[kuddusrhce]

Okay got it. Also Is there any way to add command or any package in existing k3os? If yes then please guide me.

[dweomer]

Okay got it. Also Is there any way to add command or any package in existing k3os? If yes then please guide me.

You can either statically compile it (recommended) or build it with dynamic linking in an alpine 3.12 container and copy it (along with any dependent libs not already included in the base install) over to your k3OS system(s). Alternatively, consider a custom build of k3OS (see images/00-base/Dockerfile).

If you are looking to install a package the you will have to copy the binary and any other support files onto your k3OS system(s). What this looks like depends on the package.