WIP: overlay node image before bootstrapping if necessary #899
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As per openshift/enhancements#1637, we're trying
to get rid of all OpenShift-versioned components from the bootimages.
This means that there will no longer be oc, kubelet, or crio
binaries for example, which bootstrapping obviously relies on.
To adapt to this, the OpenShift installer now ships a new
node-image-overlay.service
in its bootstrap Ignition config. Thisservice takes care of pulling down the node image and overlaying it,
effectively updating the system to the node image version.
Here, we accordingly also adapt assisted-installer so that we run
node-image-overlay.service
before starting e.g.kubelet.service
andbootkube.service
.See also: openshift/installer#8742