starlingx/integ
Code Issues Proposed changes

Remove kubelet.service Restart=always override from kubeadm.conf

Browse Source 
kubelet.service is managed by pmond and requires the property
Restart=no so there is no interferrence with systemd.

The Restart property was being configured in 3 places (i.e.,
the service definition file, and two DropIns), resulting in
the property being set to Restart=always. Based on system load
and timing, this can lead to a perpetual process restart due to
both systemd and pmon conflicting over process recovery. This
causes autonomous host reboot loop.

This update removes Restart=always from kubeadm.conf so that
only kube-stx-override.conf overrides this property.

The following locations contained the conflicting property:
/lib/systemd/system/kubelet.service
Restart=on-failure

/etc/systemd/system/kubelet.service.d/kube-stx-override.conf
Restart=no

/etc/systemd/system/kubelet.service.d/kubeadm.conf
Restart=always

Partial-Bug: 2104921

TEST-PLAN:
PASS: Fresh install on AIO-SX, AIO-DX, Standard.
PASS: Verify kubelet.service has Restart=no
      systemctl show -p Restart kubelet.service
PASS: Issue 'system kube-config-kubelet' and verify
      kubelet.service restarts via pmon.
PASS: Manually kill kubelet process and verify
      kubelet.service restarts via pmon.
      sudo pkill -9 -f /usr/bin/kubelet
PASS: Manually restart kubelet.service via pmon and verify
      kubelet.service restarts via pmon.
      sudo /usr/local/sbin/pmon-restart kubelet
PASS: Manually restart kubelet.service via system and verify
      kubelet.service restarts via pmon. kubelet.service likely
      restarts twice, first by systemd, then by pmon.
      sudo systemctl restart kubelet.service
PASS: Kubernetes upgrade from 1.29 to 1.30

Change-Id: I453ea26ab3db7127a44735cc8cd626be2113557b
Signed-off-by: Jim Gauld <James.Gauld@windriver.com>
This commit is contained in:
Jim Gauld 2025-03-28 13:17:34 -04:00
parent 64f2ed4e98
commit b500a507a7
8 changed files with 0 additions and 8 deletions
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1
kubernetes/kubernetes-1.24.4/debian/deb_folder/kubeadm.conf
View File

@ -13,6 +13,5 @@ ExecStartPre=-/usr/local/sbin/sanitize_kubelet_reserved_cpus.sh /etc/default/kub
ExecStartPre=-/usr/bin/kubelet-cgroup-setup.sh
ExecStartPost=/bin/bash -c 'echo $MAINPID > /var/run/kubelet.pid;'
ExecStopPost=/bin/rm -f /var/run/kubelet.pid
Restart=always
StartLimitInterval=0
RestartSec=10

1
kubernetes/kubernetes-1.25.3/debian/deb_folder/kubeadm.conf
View File

@ -13,6 +13,5 @@ ExecStartPre=-/usr/local/sbin/sanitize_kubelet_reserved_cpus.sh /etc/default/kub
ExecStartPre=-/usr/bin/kubelet-cgroup-setup.sh
ExecStartPost=/bin/bash -c 'echo $MAINPID > /var/run/kubelet.pid;'
ExecStopPost=/bin/rm -f /var/run/kubelet.pid
Restart=always
StartLimitInterval=0
RestartSec=10

1
kubernetes/kubernetes-1.26.1/debian/deb_folder/kubeadm.conf
View File

@ -13,6 +13,5 @@ ExecStartPre=-/usr/local/sbin/sanitize_kubelet_reserved_cpus.sh /etc/default/kub
ExecStartPre=-/usr/bin/kubelet-cgroup-setup.sh
ExecStartPost=/bin/bash -c 'echo $MAINPID > /var/run/kubelet.pid;'
ExecStopPost=/bin/rm -f /var/run/kubelet.pid
Restart=always
StartLimitInterval=0
RestartSec=10

1
kubernetes/kubernetes-1.27.5/debian/deb_folder/kubeadm.conf
View File

@ -13,6 +13,5 @@ ExecStartPre=-/usr/local/sbin/sanitize_kubelet_reserved_cpus.sh /etc/default/kub
ExecStartPre=-/usr/bin/kubelet-cgroup-setup.sh
ExecStartPost=/bin/bash -c 'echo $MAINPID > /var/run/kubelet.pid;'
ExecStopPost=/bin/rm -f /var/run/kubelet.pid
Restart=always
StartLimitInterval=0
RestartSec=10

1
kubernetes/kubernetes-1.28.4/debian/deb_folder/kubeadm.conf
View File

@ -13,6 +13,5 @@ ExecStartPre=-/usr/local/sbin/sanitize_kubelet_reserved_cpus.sh /etc/default/kub
ExecStartPre=-/usr/bin/kubelet-cgroup-setup.sh
ExecStartPost=/bin/bash -c 'echo $MAINPID > /var/run/kubelet.pid;'
ExecStopPost=/bin/rm -f /var/run/kubelet.pid
Restart=always
StartLimitInterval=0
RestartSec=10

1
kubernetes/kubernetes-1.29.2/debian/deb_folder/kubeadm.conf
View File

@ -13,6 +13,5 @@ ExecStartPre=-/usr/local/sbin/sanitize_kubelet_reserved_cpus.sh /etc/default/kub
ExecStartPre=-/usr/bin/kubelet-cgroup-setup.sh
ExecStartPost=/bin/bash -c 'echo $MAINPID > /var/run/kubelet.pid;'
ExecStopPost=/bin/rm -f /var/run/kubelet.pid
Restart=always
StartLimitInterval=0
RestartSec=10

1
kubernetes/kubernetes-1.30.6/debian/deb_folder/kubeadm.conf
View File

@ -13,6 +13,5 @@ ExecStartPre=-/usr/local/sbin/sanitize_kubelet_reserved_cpus.sh /etc/default/kub
ExecStartPre=-/usr/bin/kubelet-cgroup-setup.sh
ExecStartPost=/bin/bash -c 'echo $MAINPID > /var/run/kubelet.pid;'
ExecStopPost=/bin/rm -f /var/run/kubelet.pid
Restart=always
StartLimitInterval=0
RestartSec=10

1
kubernetes/kubernetes-1.31.5/debian/deb_folder/kubeadm.conf
View File

@ -13,6 +13,5 @@ ExecStartPre=-/usr/local/sbin/sanitize_kubelet_reserved_cpus.sh /etc/default/kub
ExecStartPre=-/usr/bin/kubelet-cgroup-setup.sh
ExecStartPost=/bin/bash -c 'echo $MAINPID > /var/run/kubelet.pid;'
ExecStopPost=/bin/rm -f /var/run/kubelet.pid
Restart=always
StartLimitInterval=0
RestartSec=10