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add-ignition-via-butane's Introduction

Add ssh key to RHCOS ISO via butane

Official documentation : https://coreos.github.io/butane/getting-started/

Download RHCOS iso :

https://mirror.openshift.com/pub/openshift-v4/dependencies/rhcos/

Build the ignition file before deploying it to RHCOS via coreos-installer

Create the butane file

Modify the sample below to add your administrator public key, and rename the extension file as ".bu":

Sample

Generate the ignition config file

podman run -i --rm quay.io/coreos/butane:latest --pretty --strict < ./config/add-ssh-key.bu > ./config/added-ssh-key.ign

Command to embed/show/remove ignition file for RHCOS

Embed the ignition config file in the ISO

podman run --rm --tty --interactive \
    --volume ./config:/builder \
    --workdir /builder \
    quay.io/coreos/coreos-installer:main \
    iso ignition embed -i ./added-ssh-key.ign ./rhcos-live.x86_64.iso

Show if the ignition is added or removed

podman run --rm --tty --interactive \
    --volume ./config:/builder \
    --workdir /builder \
    quay.io/coreos/coreos-installer:main \
    iso ignition show /builder/rhcos-live.x86_64.iso

Remove the ignition configuration file

podman run --rm --tty --interactive \
    --volume ./config:/builder \
    --workdir /builder \
    quay.io/coreos/coreos-installer:main \
    iso ignition remove ./rhcos-live.x86_64.iso

Execute coreos-installer

podman run --rm --tty --interactive \
    --volume ./config:/builder \
    --workdir /builder \
    quay.io/coreos/coreos-installer:main
    ## put args here

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