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lib/deploy: Support locking deployment finalization #1841

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@jlebon jlebon commented Apr 16, 2019

Teach ostree-finalize-staged.service to check for a file in /run to
determine if it should do the finalization. This will be used in
RPM-OSTree, where we want to be able to separate out "preparing updates"
from "making update the default" for more fine-grained control. See:
coreos/rpm-ostree#1748

@jlebon jlebon added the WIP label Apr 16, 2019
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jlebon commented Apr 16, 2019

Ahh, keep forgetting to try out the new GitHub draft PR feature.
Anyway, marking as WIP for now. Still testing this!

@jlebon jlebon changed the title lib/deploy: Support gating deployment finalization WIP: lib/deploy: Support gating deployment finalization Apr 16, 2019
@jlebon jlebon force-pushed the pr/staging-paths branch 2 times, most recently from 5ccec0c to 094ef46 Compare April 17, 2019 02:57
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Do we expect rpm-ostree will e.g. always write out this file when it starts?

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jlebon commented Apr 17, 2019

Do we expect rpm-ostree will e.g. always write out this file when it starts?

Yeah, so basically I'm thinking something like:

  • agent calls UpdateDeployment with lock-finalization option on
    • touch /run/ostree/staged-deployment-locked
    • stage deployment
  • at a later time, agent calls UnlockStagedDeployment, which removes the file

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jlebon commented Apr 17, 2019

I guess we could always write out the file on boot... Hmm, this ties into coreos/rpm-ostree#1747 as well. E.g. if we're driven by an agent, then we could default to always locking finalization? Though I think I'd prefer making it explicit still and just let the "driver" part be about automatic updates and injecting info in rpm-ostree status as discussed in that issue.

Rather than wrapping each instance of `sd_journal_*` with
`HAVE_SYSTEMD`, let's just add some convenience macros that are just
no-op if we're not compiling with systemd.
This can happen if a deployment was staged and later cleaned up. Though
just as a helper when debugging issues, let's explicitly mention that
case.
Teach `ostree-finalize-staged.service` to check for a file in `/run` to
determine if it should do the finalization. This will be used in
RPM-OSTree, where we want to be able to separate out "preparing updates"
from "making update the default" for more fine-grained control. See:
coreos/rpm-ostree#1748
@jlebon jlebon changed the title WIP: lib/deploy: Support gating deployment finalization lib/deploy: Support gating deployment finalization Apr 24, 2019
@jlebon jlebon changed the title lib/deploy: Support gating deployment finalization lib/deploy: Support locking deployment finalization Apr 24, 2019
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jlebon commented Apr 24, 2019

OK, this one should be good to go!

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@rh-atomic-bot r+ b003fcd

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⌛ Testing commit b003fcd with merge 586cc2d...

rh-atomic-bot pushed a commit that referenced this pull request Apr 24, 2019
This can happen if a deployment was staged and later cleaned up. Though
just as a helper when debugging issues, let's explicitly mention that
case.

Closes: #1841
Approved by: cgwalters
rh-atomic-bot pushed a commit that referenced this pull request Apr 24, 2019
Teach `ostree-finalize-staged.service` to check for a file in `/run` to
determine if it should do the finalization. This will be used in
RPM-OSTree, where we want to be able to separate out "preparing updates"
from "making update the default" for more fine-grained control. See:
coreos/rpm-ostree#1748

Closes: #1841
Approved by: cgwalters
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☀️ Test successful - status-atomicjenkins
Approved by: cgwalters
Pushing 586cc2d to master...

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3 participants