docs/faq: add question about unpredictable block device names #1382
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I guess it's probably worth linking to openshift/machine-config-operator#1720 in there. |
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cgwalters
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Oct 12, 2023
| ## Q: How do I configure a secondary block device via Ignition/MC if the name varies on each node? | ||
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| First, verify that there isn't a `/dev/disk/by-*` symlink which works for your needs. If not, a few approaches exist: | ||
| - If this is a fresh install and you're using the live environment to install RHCOS, as part of the install flow you can inspect the machine (by hand, or scripted) to imperatively figure out what the block device should be according to your own heuristics (e.g. "the only multipath device there is", or "the only NVMe block device"). You can then e.g. "render" the final Ignition config with the device path to pass to `coreos-installer` or directly partition it and optionally format it and use a consistent partition (and optionally filesystem) label that will be available to use in the generic Ignition config. |
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I'm pretty sure Assisted Installer ships some logic to do this.
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Do you have a link offhand? Definitely makes sense to link to AI docs if that's what the reader is actually using.
This has come up multiple times now.
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travier
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Oct 16, 2023
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I think this one just needs a |
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/lgtm |
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This has come up multiple times now.