OCPBUGS-30569: Systemd processes not being moved to cpuset/systemd.slice fix #992

rbaturov · 2024-03-14T16:07:55Z

The script cpuset-configure.sh is responsible to move the
systemd processes to the cpuset/systemd.slice cgroup and is executed
in a form of a service (cpuset-configure.service).

In the current implementation, the script is executed too early - some
system processes are yet to be created.
This in turn leads to them not being moved to the custom system slice.

Moreover, in the current implementation, the script is executed before
the network-online.target. The intention was to execute the script before
kubelet and crio services are initialized (by the fact network-online.target
is a common parent) in order to make sure that no workload pods are starting
before we are making this transition.

The fix I'm proposing consist of the following changes:

Adding an After statement - The script will start once crio service is initialized,
due to the fact it's initialized in the very end of the boot process,
just a bit before kubelet.
Thereby we can ensure late starting processes do not fall between the cracks.
Narrowing down the Before statement to a more accurate
one, reflecting its original intention. (Running the script before kubelet
only would be enough guarantee no workload pods are started at that time).

openshift-ci-robot · 2024-03-14T16:08:03Z

@rbaturov: This pull request references Jira Issue OCPBUGS-30569, which is valid. The bug has been moved to the POST state.

3 validation(s) were run on this bug

bug is open, matching expected state (open)
bug target version (4.16.0) matches configured target version for branch (4.16.0)
bug is in the state ASSIGNED, which is one of the valid states (NEW, ASSIGNED, POST)

No GitHub users were found matching the public email listed for the QA contact in Jira (mniranja@redhat.com), skipping review request.

The bug has been updated to refer to the pull request using the external bug tracker.

In response to this:

The script cpuset-configure.sh is responsible to move the systemd processes to the cpuset/systemd.slice cgroup and is executed in a form of a service (cpuset-configure.service).

In the current implementation, the script is executed too early - some system processes are yet to be created.
This in turn leads to them not being moved to the custom system slice.

Moreover, in the current implementation, the script is executed before the network-online.target. The intention was to execute the script before kubelet and crio services are initialized, by the fact network-online.target is a common parent.

The fix I'm proposing consist of the following changes:

Adding an After statements - The script will start once the late starting processes as NetworkManager, sshd, etc... are started. Thereby we can ensure processes as such do not fall between the cracks.

Narrowing down the Before statement to a more accurate one, reflecting its original intention.

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 openshift-eng/jira-lifecycle-plugin repository.

rbaturov · 2024-03-14T16:10:39Z

/hold
This is not final, need to rerun render-sync and push updated manifests.

rbaturov · 2024-03-14T16:19:54Z

System services boot order without the fix

System services boot order with the fix

The full plots can be found in the Jira ticket in the comments section.

rbaturov · 2024-03-17T10:02:47Z

/retest-required

pkg/performanceprofile/controller/performanceprofile/components/machineconfig/machineconfig.go

haircommander · 2024-03-19T10:18:08Z

general approach LGTM

one question but it doesn't necessarily need to be addressed

rbaturov · 2024-03-19T10:57:52Z

/unhold

test/e2e/performanceprofile/functests/1_performance/performance.go

rbaturov · 2024-03-24T19:31:20Z

/retest-required

rbaturov · 2024-03-25T07:32:04Z

/hold
Please don't retest.
We have legit errors with this solution.

   [FAILED] The node ci-op-xb6r1606-13bd6-r6bt4-worker-a-fdtrd has the following processes on the root cgroup: [/usr/bin/rpcbind -w -f /usr/sbin/rpc.statd /usr/lib/polkit-1/polkitd --no-debug]
  Expected
      <[]string | len:3, cap:3>: [
          "/usr/bin/rpcbind -w -f",
          "/usr/sbin/rpc.statd",
          "/usr/lib/polkit-1/polkitd --no-debug",
      ]
  to be empty
  In [It] at: /go/src/github.com/openshift/cluster-node-tuning-operator/test/e2e/performanceprofile/functests/1_performance/performance.go:304 @ 03/24/24 20:34:35.789

openshift-ci-robot · 2024-03-25T12:14:46Z

@rbaturov: This pull request references Jira Issue OCPBUGS-30569, which is valid.

3 validation(s) were run on this bug

bug is open, matching expected state (open)
bug target version (4.16.0) matches configured target version for branch (4.16.0)
bug is in the state POST, which is one of the valid states (NEW, ASSIGNED, POST)

No GitHub users were found matching the public email listed for the QA contact in Jira (mniranja@redhat.com), skipping review request.

In response to this:

The script cpuset-configure.sh is responsible to move the
systemd processes to the cpuset/systemd.slice cgroup and is executed
in a form of a service (cpuset-configure.service).

In the current implementation, the script is executed too early - some
system processes are yet to be created.
This in turn leads to them not being moved to the custom system slice.

Moreover, in the current implementation, the script is executed before
the network-online.target. The intention was to execute the script before
kubelet and crio services are initialized (by the fact network-online.target
is a common parent) in order to make sure that no workload pods are starting
before we are making this transition.

The fix I'm proposing consist of the following changes:

Adding an After statement - The script will start once crio service is initialized,
due to the fact it's initialized in the very end of the boot process,
just a bit before kubelet.
Thereby we can ensure late starting processes do not fall between the cracks.

Narrowing down the Before statement to a more accurate
one, reflecting its original intention. (Running the script before kubelet
only would be enough guarantee no workload pods are started at that time).

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 openshift-eng/jira-lifecycle-plugin repository.

rbaturov · 2024-03-25T13:47:01Z

/retest-required

The script cpuset-configure.sh is responsible to move the systemd processes to the cpuset/systemd.slice cgroup and is executed in a form of a service (cpuset-configure.service). In the current implementation, the script is executed too early - some system processes are yet to be created. This in turn leads to them not being moved to the custom system slice. Moreover, in the current implementation, the script is executed before the network-online.target. The intention was to execute the script before kubelet and crio services are initialized (by the fact network-online.target is a common parent) in order to make sure that no workload pods are starting before we are making this transition. The fix I'm proposing consist of the following changes: 1. Adding an After statements - The script will start once crio service is initialized, due to the fact it's initialized in the very end of the boot process, just a bit before kubelet. Thereby we can ensure late starting processes do not fall between the cracks. 2. Narrowing down the Before statement to a more accurate one, reflecting its original intention. (Running the script before kubelet only would be enough guarantee no workload pods are started at that time). Signed-off-by: Ronny Baturov <rbaturov@redhat.com>

When we are using cgroups v1 we are counting on the cpuset-configure.service to move all the system services to the custom system.slice. This test ensures the service indeed moved them. It is also a good practice to check for similar errors on cgroup v2 systems. Signed-off-by: Ronny Baturov <rbaturov@redhat.com>

rbaturov · 2024-03-27T21:31:32Z

/retest-required

rbaturov · 2024-03-28T07:12:01Z

/unhold

yanirq · 2024-04-01T14:50:34Z

/lgtm

@MarSik PTAL for another review

openshift-ci · 2024-04-01T14:51:19Z

@yanirq: GitHub didn't allow me to request PR reviews from the following users: PTAL, for, another, review.

Note that only openshift members and repo collaborators can review this PR, and authors cannot review their own PRs.

In response to this:

/lgtm

/cc @MarSik PTAL for another review

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.

ffromani · 2024-04-03T06:32:04Z

/approve

the test seems ok - as simple as can be, and the dependency logic seems to be the sweet spot

openshift-ci · 2024-04-03T06:32:36Z

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: ffromani, rbaturov

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Needs approval from an approver in each of these files:

~~OWNERS~~ [ffromani]

Approvers can indicate their approval by writing /approve in a comment
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openshift-ci-robot · 2024-04-03T07:55:08Z

/retest-required

Remaining retests: 0 against base HEAD 1bb1dcc and 2 for PR HEAD 809bebf in total

openshift-ci · 2024-04-03T10:33:42Z

@rbaturov: all tests passed!

Full PR test history. Your PR dashboard.

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. I understand the commands that are listed here.

openshift-ci-robot · 2024-04-03T10:36:22Z

@rbaturov: Jira Issue OCPBUGS-30569: All pull requests linked via external trackers have merged:

openshift/cluster-node-tuning-operator#992

Jira Issue OCPBUGS-30569 has been moved to the MODIFIED state.

In response to this:

The script cpuset-configure.sh is responsible to move the
systemd processes to the cpuset/systemd.slice cgroup and is executed
in a form of a service (cpuset-configure.service).

In the current implementation, the script is executed too early - some
system processes are yet to be created.
This in turn leads to them not being moved to the custom system slice.

Moreover, in the current implementation, the script is executed before
the network-online.target. The intention was to execute the script before
kubelet and crio services are initialized (by the fact network-online.target
is a common parent) in order to make sure that no workload pods are starting
before we are making this transition.

The fix I'm proposing consist of the following changes:

Adding an After statement - The script will start once crio service is initialized,
due to the fact it's initialized in the very end of the boot process,
just a bit before kubelet.
Thereby we can ensure late starting processes do not fall between the cracks.

Narrowing down the Before statement to a more accurate
one, reflecting its original intention. (Running the script before kubelet
only would be enough guarantee no workload pods are started at that time).

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 openshift-eng/jira-lifecycle-plugin repository.

rbaturov · 2024-04-03T10:58:12Z

/cherry-pick release-4.15

openshift-cherrypick-robot · 2024-04-03T10:58:54Z

@rbaturov: #992 failed to apply on top of branch "release-4.15":

Applying: Systemd processes not being moved to cpuset/systemd.slice fix
Using index info to reconstruct a base tree...
A	test/e2e/performanceprofile/testdata/render-expected-output/bootstrap/extra-ctrcfg/openshift-bootstrap-master_machineconfig.yaml
A	test/e2e/performanceprofile/testdata/render-expected-output/bootstrap/extra-ctrcfg/openshift-bootstrap-worker_machineconfig.yaml
M	test/e2e/performanceprofile/testdata/render-expected-output/bootstrap/extra-mcp/openshift-bootstrap-master_machineconfig.yaml
M	test/e2e/performanceprofile/testdata/render-expected-output/bootstrap/extra-mcp/openshift-bootstrap-worker_machineconfig.yaml
M	test/e2e/performanceprofile/testdata/render-expected-output/bootstrap/no-mcp/openshift-bootstrap-master_machineconfig.yaml
M	test/e2e/performanceprofile/testdata/render-expected-output/bootstrap/no-mcp/openshift-bootstrap-worker_machineconfig.yaml
A	test/e2e/performanceprofile/testdata/render-expected-output/default/cpuFrequency/manual_machineconfig.yaml
M	test/e2e/performanceprofile/testdata/render-expected-output/default/manual_machineconfig.yaml
Falling back to patching base and 3-way merge...
Auto-merging test/e2e/performanceprofile/testdata/render-expected-output/default/manual_machineconfig.yaml
CONFLICT (modify/delete): test/e2e/performanceprofile/testdata/render-expected-output/default/cpuFrequency/manual_machineconfig.yaml deleted in HEAD and modified in Systemd processes not being moved to cpuset/systemd.slice fix. Version Systemd processes not being moved to cpuset/systemd.slice fix of test/e2e/performanceprofile/testdata/render-expected-output/default/cpuFrequency/manual_machineconfig.yaml left in tree.
Auto-merging test/e2e/performanceprofile/testdata/render-expected-output/bootstrap/no-mcp/openshift-bootstrap-worker_machineconfig.yaml
Auto-merging test/e2e/performanceprofile/testdata/render-expected-output/bootstrap/no-mcp/openshift-bootstrap-master_machineconfig.yaml
Auto-merging test/e2e/performanceprofile/testdata/render-expected-output/bootstrap/extra-mcp/openshift-bootstrap-worker_machineconfig.yaml
Auto-merging test/e2e/performanceprofile/testdata/render-expected-output/bootstrap/extra-mcp/openshift-bootstrap-master_machineconfig.yaml
CONFLICT (modify/delete): test/e2e/performanceprofile/testdata/render-expected-output/bootstrap/extra-ctrcfg/openshift-bootstrap-worker_machineconfig.yaml deleted in HEAD and modified in Systemd processes not being moved to cpuset/systemd.slice fix. Version Systemd processes not being moved to cpuset/systemd.slice fix of test/e2e/performanceprofile/testdata/render-expected-output/bootstrap/extra-ctrcfg/openshift-bootstrap-worker_machineconfig.yaml left in tree.
CONFLICT (modify/delete): test/e2e/performanceprofile/testdata/render-expected-output/bootstrap/extra-ctrcfg/openshift-bootstrap-master_machineconfig.yaml deleted in HEAD and modified in Systemd processes not being moved to cpuset/systemd.slice fix. Version Systemd processes not being moved to cpuset/systemd.slice fix of test/e2e/performanceprofile/testdata/render-expected-output/bootstrap/extra-ctrcfg/openshift-bootstrap-master_machineconfig.yaml left in tree.
error: Failed to merge in the changes.
hint: Use 'git am --show-current-patch=diff' to see the failed patch
Patch failed at 0001 Systemd processes not being moved to cpuset/systemd.slice fix
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:

/cherry-pick release-4.15

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.

…/systemd.slice fix This is a manual backport for openshift#992 * Systemd processes not being moved to cpuset/systemd.slice fix The script cpuset-configure.sh is responsible to move the systemd processes to the cpuset/systemd.slice cgroup and is executed in a form of a service (cpuset-configure.service). In the current implementation, the script is executed too early - some system processes are yet to be created. This in turn leads to them not being moved to the custom system slice. Moreover, in the current implementation, the script is executed before the network-online.target. The intention was to execute the script before kubelet and crio services are initialized (by the fact network-online.target is a common parent) in order to make sure that no workload pods are starting before we are making this transition. The fix I'm proposing consist of the following changes: 1. Adding an After statements - The script will start once crio service is initialized, due to the fact it's initialized in the very end of the boot process, just a bit before kubelet. Thereby we can ensure late starting processes do not fall between the cracks. 2. Narrowing down the Before statement to a more accurate one, reflecting its original intention. (Running the script before kubelet only would be enough guarantee no workload pods are started at that time). Signed-off-by: Ronny Baturov <rbaturov@redhat.com> * Added a test to verify system processes are in the correct cgroup When we are using cgroups v1 we are counting on the cpuset-configure.service to move all the system services to the custom system.slice. This test ensures the service indeed moved them. It is also a good practice to check for similar errors on cgroup v2 systems. Signed-off-by: Ronny Baturov <rbaturov@redhat.com> --------- Signed-off-by: Ronny Baturov <rbaturov@redhat.com>

This is a manual backport for openshift#992 * Systemd processes not being moved to cpuset/systemd.slice fix The script cpuset-configure.sh is responsible to move the systemd processes to the cpuset/systemd.slice cgroup and is executed in a form of a service (cpuset-configure.service). In the current implementation, the script is executed too early - some system processes are yet to be created. This in turn leads to them not being moved to the custom system slice. Moreover, in the current implementation, the script is executed before the network-online.target. The intention was to execute the script before kubelet and crio services are initialized (by the fact network-online.target is a common parent) in order to make sure that no workload pods are starting before we are making this transition. The fix I'm proposing consist of the following changes: 1. Adding an After statements - The script will start once crio service is initialized, due to the fact it's initialized in the very end of the boot process, just a bit before kubelet. Thereby we can ensure late starting processes do not fall between the cracks. 2. Narrowing down the Before statement to a more accurate one, reflecting its original intention. (Running the script before kubelet only would be enough guarantee no workload pods are started at that time). Signed-off-by: Ronny Baturov <rbaturov@redhat.com> * Added a test to verify system processes are in the correct cgroup When we are using cgroups v1 we are counting on the cpuset-configure.service to move all the system services to the custom system.slice. This test ensures the service indeed moved them. It is also a good practice to check for similar errors on cgroup v2 systems. Signed-off-by: Ronny Baturov <rbaturov@redhat.com> --------- Signed-off-by: Ronny Baturov <rbaturov@redhat.com>

openshift-bot · 2024-04-03T22:32:29Z

[ART PR BUILD NOTIFIER]

This PR has been included in build cluster-node-tuning-operator-container-v4.16.0-202404031748.p0.g89b3e39.assembly.stream.el9 for distgit cluster-node-tuning-operator.
All builds following this will include this PR.

This is a manual backport for openshift#992 * Systemd processes not being moved to cpuset/systemd.slice fix The script cpuset-configure.sh is responsible to move the systemd processes to the cpuset/systemd.slice cgroup and is executed in a form of a service (cpuset-configure.service). In the current implementation, the script is executed too early - some system processes are yet to be created. This in turn leads to them not being moved to the custom system slice. Moreover, in the current implementation, the script is executed before the network-online.target. The intention was to execute the script before kubelet and crio services are initialized (by the fact network-online.target is a common parent) in order to make sure that no workload pods are starting before we are making this transition. The fix I'm proposing consist of the following changes: 1. Adding an After statements - The script will start once crio service is initialized, due to the fact it's initialized in the very end of the boot process, just a bit before kubelet. Thereby we can ensure late starting processes do not fall between the cracks. 2. Narrowing down the Before statement to a more accurate one, reflecting its original intention. (Running the script before kubelet only would be enough guarantee no workload pods are started at that time). Signed-off-by: Ronny Baturov <rbaturov@redhat.com> * Added a test to verify system processes are in the correct cgroup When we are using cgroups v1 we are counting on the cpuset-configure.service to move all the system services to the custom system.slice. This test ensures the service indeed moved them. It is also a good practice to check for similar errors on cgroup v2 systems. Signed-off-by: Ronny Baturov <rbaturov@redhat.com> --------- Signed-off-by: Ronny Baturov <rbaturov@redhat.com>

This is a manual backport for #992 * Systemd processes not being moved to cpuset/systemd.slice fix The script cpuset-configure.sh is responsible to move the systemd processes to the cpuset/systemd.slice cgroup and is executed in a form of a service (cpuset-configure.service). In the current implementation, the script is executed too early - some system processes are yet to be created. This in turn leads to them not being moved to the custom system slice. Moreover, in the current implementation, the script is executed before the network-online.target. The intention was to execute the script before kubelet and crio services are initialized (by the fact network-online.target is a common parent) in order to make sure that no workload pods are starting before we are making this transition. The fix I'm proposing consist of the following changes: 1. Adding an After statements - The script will start once crio service is initialized, due to the fact it's initialized in the very end of the boot process, just a bit before kubelet. Thereby we can ensure late starting processes do not fall between the cracks. 2. Narrowing down the Before statement to a more accurate one, reflecting its original intention. (Running the script before kubelet only would be enough guarantee no workload pods are started at that time). * Added a test to verify system processes are in the correct cgroup When we are using cgroups v1 we are counting on the cpuset-configure.service to move all the system services to the custom system.slice. This test ensures the service indeed moved them. It is also a good practice to check for similar errors on cgroup v2 systems. --------- Signed-off-by: Ronny Baturov <rbaturov@redhat.com>

openshift-ci bot added the do-not-merge/hold Indicates that a PR should not merge because someone has issued a /hold command. label Mar 14, 2024

openshift-ci bot requested review from jmencak and Tal-or March 14, 2024 16:11

rbaturov force-pushed the system-processes-not-moved-fix branch from b4c5e0d to a04faf5 Compare March 17, 2024 07:02

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openshift-merge-bot bot merged commit 89b3e39 into openshift:master Apr 3, 2024
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rbaturov mentioned this pull request Apr 3, 2024

OCPBUGS-31692: [release-4.15] [manual]: Systemd processes not being moved to cpuset/systemd.slice fix #1016

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OCPBUGS-30569: Systemd processes not being moved to cpuset/systemd.slice fix #992

OCPBUGS-30569: Systemd processes not being moved to cpuset/systemd.slice fix #992

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OCPBUGS-30569: Systemd processes not being moved to cpuset/systemd.slice fix #992

OCPBUGS-30569: Systemd processes not being moved to cpuset/systemd.slice fix #992

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