integ/kubernetes/kubernetes-1.20.9/centos/files/kubelet-cgroup-setup.sh
Jim Gauld 94517398e4 Add staged kubernetes version 1.20.9
Multiple versions of kubernetes are required to support upgrade.

This adds staged version of kubernetes 1.20.9, built with a
specific version of golang.

All subpackage versions are included in the iso image without
collisions.

The following patches are ported to specific kubernetes version:
kubelet-cpumanager-disable-CFS-quota-throttling-for-.patch
kubelet-cpumanager-keep-normal-containers-off-reserv.patch
kubelet-cpumanager-infrastructure-pods-use-system-re.patch
kubelet-cpumanager-introduce-concept-of-isolated-CPU.patch
kubeadm-create-platform-pods-with-zero-CPU-resources.patch
enable-support-for-kubernetes-to-ignore-isolcpus.patch

Story: 2008972
Task: 43056

Signed-off-by: Jim Gauld <james.gauld@windriver.com>
Change-Id: Ie19612f1980690be073ab2236afbb9ccefe504e5
2021-09-13 14:53:42 -04:00

133 lines
3.8 KiB
Bash

#!/bin/bash
#
# Copyright (c) 2019 Wind River Systems, Inc.
#
# SPDX-License-Identifier: Apache-2.0
#
# This script does minimal cgroup setup for kubelet. 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.
#
# Define minimal path
PATH=/bin:/usr/bin:/usr/local/bin
# Log info message to /var/log/daemon.log
function LOG {
logger -p daemon.info "$0($$): $@"
}
# Log error message to /var/log/daemon.log
function ERROR {
logger -s -p daemon.error "$0($$): ERROR: $@"
}
# Create minimal cgroup directories and configure cpuset attributes if required
function create_cgroup {
local cg_name=$1
local cg_nodeset=$2
local cg_cpuset=$3
local CGROUP=/sys/fs/cgroup
local CONTROLLERS_AUTO_DELETED=("pids" "hugetlb")
local CONTROLLERS_PRESERVED=("cpuset" "memory" "cpu,cpuacct" "systemd")
local cnt=''
local CGDIR=''
local RC=0
# Ensure that these cgroups are created every time as they are auto deleted
for cnt in ${CONTROLLERS_AUTO_DELETED[@]}; do
CGDIR=${CGROUP}/${cnt}/${cg_name}
if [ -d ${CGDIR} ]; then
LOG "Nothing to do, already configured: ${CGDIR}."
continue
fi
LOG "Creating: ${CGDIR}"
mkdir -p ${CGDIR}
RC=$?
if [ ${RC} -ne 0 ]; then
ERROR "Creating: ${CGDIR}, rc=${RC}"
exit ${RC}
fi
done
# These cgroups are preserved so if any of these are encountered additional
# cgroup setup is not required
for cnt in ${CONTROLLERS_PRESERVED[@]}; do
CGDIR=${CGROUP}/${cnt}/${cg_name}
if [ -d ${CGDIR} ]; then
LOG "Nothing to do, already configured: ${CGDIR}."
exit ${RC}
fi
LOG "Creating: ${CGDIR}"
mkdir -p ${CGDIR}
RC=$?
if [ ${RC} -ne 0 ]; then
ERROR "Creating: ${CGDIR}, rc=${RC}"
exit ${RC}
fi
done
# Customize cpuset attributes
LOG "Configuring cgroup: ${cg_name}, nodeset: ${cg_nodeset}, cpuset: ${cg_cpuset}"
CGDIR=${CGROUP}/cpuset/${cg_name}
local CGMEMS=${CGDIR}/cpuset.mems
local CGCPUS=${CGDIR}/cpuset.cpus
local CGTASKS=${CGDIR}/tasks
# Assign cgroup memory nodeset
LOG "Assign nodeset ${cg_nodeset} to ${CGMEMS}"
/bin/echo ${cg_nodeset} > ${CGMEMS}
RC=$?
if [ ${RC} -ne 0 ]; then
ERROR "Unable to write to: ${CGMEMS}, rc=${RC}"
exit ${RC}
fi
# Assign cgroup cpus
LOG "Assign cpuset ${cg_cpuset} to ${CGCPUS}"
/bin/echo ${cg_cpuset} > ${CGCPUS}
RC=$?
if [ ${RC} -ne 0 ]; then
ERROR "Assigning: ${cg_cpuset} to ${CGCPUS}, rc=${RC}"
exit ${RC}
fi
# Set file ownership
chown root:root ${CGMEMS} ${CGCPUS} ${CGTASKS}
RC=$?
if [ ${RC} -ne 0 ]; then
ERROR "Setting owner for: ${CGMEMS}, ${CGCPUS}, ${CGTASKS}, rc=${RC}"
exit ${RC}
fi
# Set file mode permissions
chmod 644 ${CGMEMS} ${CGCPUS} ${CGTASKS}
RC=$?
if [ ${RC} -ne 0 ]; then
ERROR "Setting mode for: ${CGMEMS}, ${CGCPUS}, ${CGTASKS}, rc=${RC}"
exit ${RC}
fi
return ${RC}
}
if [ $UID -ne 0 ]; then
ERROR "Require sudo/root."
exit 1
fi
# Configure default kubepods cpuset to span all online cpus and nodes.
ONLINE_NODESET=$(/bin/cat /sys/devices/system/node/online)
ONLINE_CPUSET=$(/bin/cat /sys/devices/system/cpu/online)
# Configure kubelet cgroup to match cgroupRoot.
create_cgroup 'k8s-infra' ${ONLINE_NODESET} ${ONLINE_CPUSET}
exit $?