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Automatically create user-data secret for each MCP #319

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michaelgugino opened this issue May 12, 2020 · 24 comments
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Automatically create user-data secret for each MCP #319

michaelgugino opened this issue May 12, 2020 · 24 comments
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@michaelgugino
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Currently, the installer creates the initial user-data (stub ignition file) that is provided to machines on first boot to configure the host. This ignition stub contains a url that specifies the name of a MachineConfigPool. If a user creates a custom MachineConfigPool, the user must create a new stub ignition file manually, which is quite tedious.

We should automatically generate a new user-data secret for each MachineConfigPool created by the MCO. This would allow users to more easily consume custom MCPs via the machine-api by just specifying the corresponding user-data secret.

@sdodson
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sdodson commented May 15, 2020

Sounds good to me.

@runcom
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runcom commented Jun 23, 2020

SGTM as well but I don't think this prevents #368 from landing and the plan around managing this user data (as well as bootimages) from the MCO isn't fully hashed out either, see openshift/machine-config-operator#683 (comment) (that's yet another direction...). So, I think this would be valuable as well and we can work on something for the next release (#368 is specific for the v3 migration which is tricky per-se and we want to avoid to pull in other changes like this could be..)

@runcom
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runcom commented Jun 23, 2020

/cc @enxebre @cgwalters

@cgwalters
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This is openshift/machine-config-operator#1619 right?

@cgwalters
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I think we should do it but let's get #368 first, doesn't need to happen at the same time.

@elmiko
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elmiko commented Jun 24, 2020

this sounds reasonable to me as well

@runcom
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runcom commented Jul 2, 2020

Would we agree this is more like a bug/shortcoming we have in MCO? why do we need an enhancement? it sounds like a straightforward fix we can do in the MCO anyway (as we sync the original pools and we can add the userdata creation there as well)

@michaelgugino
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@runcom well, it's one of those things that touches multiple areas. The machine-api needs to have the user-data secret, MCO needs to create it. Whether or not this amounts to the level of an 'enhancement' IDK. I filed it in this repo because it's a cross-component issue. I didn't write a full enhancement because that seems unnecessary.

@runcom
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runcom commented Jul 27, 2020

@michaelgugino we've done this here https://github.com/openshift/machine-config-operator/pull/1792/files#diff-fa45321336db7ad1cedc28bf643a4f97R380-R404 - now any pool is getting its stub ignition config

@michaelgugino
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@runcom looks good. Anything cleaning these secrets up? I think it's probably okay to leave them there for the most part.

@runcom
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runcom commented Jul 28, 2020

@runcom looks good. Anything cleaning these secrets up? I think it's probably okay to leave them there for the most part.

nothing today but we can add something going forward - we don't have anything cleaning unused MCs yet so it should be safe as we're going to rerender the secrets as well in case something changes

@michaelgugino
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nothing today but we can add something going forward - we don't have anything cleaning unused MCs yet so it should be safe as we're going to rerender the secrets as well in case something changes

@runcom yeah, I think cleaning up MCs based on 'unused' is tricky. It might be a config I only use every so often for a particular type of workload, so it might be perfectly valid to have a MC that goes unused for an extended period of time.

As far as deleting the user-data, I'm fine with it not being deleted automatically. I think we could potentially set an owner-ref (does that work cross namespace?) on the user-data pointing to the relevant MCP and cleanup will happen automatically (again, not required IMO).

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/lifecycle stale

@openshift-ci-robot openshift-ci-robot added the lifecycle/stale Denotes an issue or PR has remained open with no activity and has become stale. label Oct 31, 2020
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/lifecycle rotten
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@openshift-bot: Closing this issue.

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@michaelgugino
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/reopen

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@michaelgugino: Reopened this issue.

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/reopen

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/close

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@openshift-bot: Closing this issue.

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Rotten issues close after 30d of inactivity.

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@michaelgugino
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/reopen

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@michaelgugino: Reopened this issue.

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/reopen

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@openshift-bot: Closing this issue.

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