Feature request: arbitrary runtime script execution

[soulshake]

Hi, really liking Kubestack so far! 🙏

It would be useful if the kubestack/framework image had a location where arbitrary scripts could be placed, which would then be executed at runtime by the default entrypoint.

This would facilitate running some extra tasks at runtime without needing to override the default entrypoint (and fixing it when that entrypoint changes).

It would enable some nice and lazy thing like, say, authenticating to a cluster in CI (just to illustrate):

FROM kubestack/framework:v0.11.0-beta.0-eks
RUN echo "[ -f $HOME/.kube/config ] || aws eks update-kubeconfig --name platform-apps-us-east-2 --alias woot --region us-east-2" >> /opt/bin/entrypoint.d/cluster-auth.sh \
    && chmod +x /opt/bin/entrypoint.d/cluster-auth.sh

Example of other images using this pattern

• postgres uses /docker-entrypoint-initdb.d/ as described here
• nginx uses /docker-entrypoint.d/ as shown here

[pst]

I think this is a valid idea to explore. Hooks seem a common approach to this. We could define points in the entrypoint and have pre- and post- hooks where it makes sense.