6bd45c96dd
This adds a kubelet ExecStartPre script to ensure cgroup is setup prior to kubelet launch. This creates k8s-infra cgroup for a minimal set of resource controllers, and configures cpuset attributes to span all online cpus and nodes. This will do nothing if the k8s-infra cgroup already exists (i.e., assume already configured). NOTE: The creation of directories under /sys/fs/cgroup is volatile, and does not persist reboots. The cpuset.mems and cpuset.cpus is later updated by puppet kubernetes.pp manifest. Tests performed: Standard system: system install, lock/unlock controller & computes, forced reboot: active/standby controller, computes. Change-Id: I6a7aad5c40fe8225e9e16c8d8b40a0cffd76715d Closes-Bug: 1828270 Signed-off-by: Jim Gauld <james.gauld@windriver.com>
18 lines
1.1 KiB
Plaintext
18 lines
1.1 KiB
Plaintext
# Note: This dropin only works with kubeadm and kubelet v1.11+
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[Service]
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Environment="KUBELET_KUBECONFIG_ARGS=--bootstrap-kubeconfig=/etc/kubernetes/bootstrap-kubelet.conf --kubeconfig=/etc/kubernetes/kubelet.conf"
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Environment="KUBELET_CONFIG_ARGS=--config=/var/lib/kubelet/config.yaml"
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# This is a file that "kubeadm init" and "kubeadm join" generates at runtime, populating the KUBELET_KUBEADM_ARGS variable dynamically
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EnvironmentFile=-/var/lib/kubelet/kubeadm-flags.env
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# This is a file that the user can use for overrides of the kubelet args as a last resort. Preferably, the user should use
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# the .NodeRegistration.KubeletExtraArgs object in the configuration files instead. KUBELET_EXTRA_ARGS should be sourced from this file.
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EnvironmentFile=-/etc/sysconfig/kubelet
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ExecStart=
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ExecStart=/usr/bin/kubelet $KUBELET_KUBECONFIG_ARGS $KUBELET_CONFIG_ARGS $KUBELET_KUBEADM_ARGS $KUBELET_EXTRA_ARGS
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ExecStartPre=-/usr/bin/kubelet-cgroup-setup.sh
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ExecStartPost=/bin/bash -c 'echo $MAINPID > /var/run/kubelet.pid;'
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ExecStopPost=/bin/rm -f /var/run/kubelet.pid
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Restart=always
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StartLimitInterval=0
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RestartSec=10
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