daemon: Explicitly start rpm-ostreed, restart if we detect active txn

[cgwalters]

This is a workaround for https://bugzilla.redhat.com/show_bug.cgi?id=1982389
which is already fixed in rpm-ostree in
coreos/rpm-ostree#2995
because it will take a fair while until we can ship the fixed
rpm-ostreed in RHEL and then OpenShift stable versions.
(Yes, this is a sad recurring pattern)

The updater client gains an explicit Initialize method, where
we also explicitly systemctl start rpm-ostreed which
then effectively rolls in the change from
coreos/rpm-ostree#2945
too.

[kikisdeliveryservice]

Two questions :)

[kikisdeliveryservice]

Thanks Colin!

/lgtm

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: cgwalters, kikisdeliveryservice, sinnykumari

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[openshift-ci]

@cgwalters: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Rerun command
ci/prow/e2e-aws-upgrade-single-node	8c87cac	link	/test e2e-aws-upgrade-single-node
ci/prow/e2e-aws-workers-rhel7	8c87cac	link	/test e2e-aws-workers-rhel7
ci/prow/e2e-ovn-step-registry	8c87cac	link	/test e2e-ovn-step-registry
ci/prow/e2e-metal-ipi	8c87cac	link	/test e2e-metal-ipi
ci/prow/e2e-vsphere-upgrade	8c87cac	link	/test e2e-vsphere-upgrade
ci/prow/e2e-aws-disruptive	8c87cac	link	/test e2e-aws-disruptive

Full PR test history. Your PR dashboard.

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[openshift-bot]

/retest-required

Please review the full test history for this PR and help us cut down flakes.

[openshift-bot]

/retest-required

Please review the full test history for this PR and help us cut down flakes.

[openshift-bot]

/retest-required

Please review the full test history for this PR and help us cut down flakes.

[openshift-bot]

/retest-required

Please review the full test history for this PR and help us cut down flakes.

[cgwalters]

/cherrypick release-4.8

[openshift-cherrypick-robot]

@cgwalters: #2677 failed to apply on top of branch "release-4.8":

Applying: daemon: Explicitly start rpm-ostreed, restart if we detect active txn
Using index info to reconstruct a base tree...
M	pkg/daemon/daemon.go
Falling back to patching base and 3-way merge...
Auto-merging pkg/daemon/daemon.go
CONFLICT (content): Merge conflict in pkg/daemon/daemon.go
error: Failed to merge in the changes.
hint: Use 'git am --show-current-patch=diff' to see the failed patch
Patch failed at 0001 daemon: Explicitly start rpm-ostreed, restart if we detect active txn
When you have resolved this problem, run "git am --continue".
If you prefer to skip this patch, run "git am --skip" instead.
To restore the original branch and stop patching, run "git am --abort".

In response to this:

/cherrypick release-4.8

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.