[release-4.14] OCPBUGS-19300: Implement workaround to allow SNO installations for OKD/FCOS #7479
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OKD/FCOS uses FCOS as its bootimage, i.e. when booting cluster nodes the first time during installation. FCOS does not provide tools such as OpenShift Client (oc) or hyperkube which are used during single-node cluster installation at first boot (e.g. oc in bootkube.sh [0]). RHCOS and SCOS include these tools, but FCOS has to pivot the root fs [1] to okd-machine-os [2] first in order to make those tools available. Pivoting uses 'rpm-ostree rebase' but during SNO installation the node will be booted from a FCOS Live ISO where the root fs and /sysroot are mounted read-only. Thus 'rpm-ostree rebase' fails and necessary tools for SNO installation will not be available, causing the setup to stall. This patch works around this issue by mounting /usr and /etc as overlay filesystems which contains both the content of the live iso as well as from the okd-machine-os container image. [0] https://github.com/openshift/installer/blob/master/data/data/bootstrap/files/usr/local/bin/bootkube.sh.template [1] https://github.com/openshift/installer/blob/master/data/data/bootstrap/files/usr/local/bin/bootstrap-pivot.sh.template [2] https://github.com/openshift/okd-machine-os
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LGTM |
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/approve |
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[APPROVALNOTIFIER] This PR is APPROVED This pull-request has been approved by: sadasu The full list of commands accepted by this bot can be found here. The pull request process is described here
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/lgtm |
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How do we get the missing cherry-pick-approved, jira/valid-bug labels? It looks like i cannot prefix the title “NO-ISSUE:” or “NO-JIRA:” because it was created by a bot :/ |
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Since 4.15 PR was merged without an issue we'll need to:
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How can we rename this PR? Is there a cli command for @openshift-cherrypick-robot? |
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Created https://issues.redhat.com/browse/OCPBUGS-19300 to track this in Jira. |
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@JM1 it's /retitle [release-4.14] OCPBUGS-19300: Implement workaround to allow SNO installations for OKD/FCOS |
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@openshift-cherrypick-robot: This pull request references Jira Issue OCPBUGS-19300, which is invalid:
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/jira refresh |
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@JM1: This pull request references Jira Issue OCPBUGS-19300, which is invalid:
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/jira refresh |
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@JM1: This pull request references Jira Issue OCPBUGS-19300, which is invalid:
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/jira refresh |
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@JM1: This pull request references Jira Issue OCPBUGS-19300, which is invalid:
Comment In response to this:
Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository. |
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/jira refresh |
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@JM1: This pull request references Jira Issue OCPBUGS-19300, which is valid. The bug has been moved to the POST state. 6 validation(s) were run on this bug
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/label cherry-pick-approved |
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@openshift-cherrypick-robot: Jira Issue OCPBUGS-19300: All pull requests linked via external trackers have merged: Jira Issue OCPBUGS-19300 has been moved to the MODIFIED state. In response to this:
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This is an automated cherry-pick of #7445
/assign JM1