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chrony: Add virtual PTP as source for chrony

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KVM virtual PTP in linux kernel allows guest to sync its
clock to the host clock with high precision. kvm-ptp has been
enabled in our kernel. Add this as a source for `chrony` so that
it can be used to sync the guest system clock.
`chrony` needs to be started in the guest for time sync.

Signed-off-by: Archana Shinde <archana.m.shinde@intel.com>
This commit is contained in:
Archana Shinde 2019-03-19 15:41:28 -07:00
parent 8fe64058aa
commit 3df19ff984
1 changed files with 8 additions and 0 deletions
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8
rootfs-builder/rootfs.sh
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@ -368,6 +368,14 @@ popd >> /dev/null
[ -n "${KERNEL_MODULES_DIR}" ] && copy_kernel_modules ${KERNEL_MODULES_DIR} ${ROOTFS_DIR}
chrony_conf_file="${ROOTFS_DIR}/etc/chrony.conf"
if [ ${distro} == ubuntu ] || [ ${distro} == debian ] ; then
chrony_conf_file="${ROOTFS_DIR}/etc/chrony/chrony.conf"
fi
info "Configure chrony file ${chrony_conf_file}"
echo "refclock PHC /dev/ptp0 poll 3 dpoll -2 offset 0" >> ${chrony_conf_file}
# The CC on s390x for fedora needs to be manually set to gcc when the golang is downloaded from the main page.
# See issue: https://github.com/kata-containers/osbuilder/issues/217
[ "$distro" == fedora ] && [ "$ARCH" == "s390x" ] && export CC=gcc