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fix(orch): disable the chronyd seccomp filter on Alpine when using PHC #3453

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Merged
tomassrnka merged 1 commit into from
Jul 29, 2026
Merged

fix(orch): disable the chronyd seccomp filter on Alpine when using PHC #3453

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16 changes: 16 additions & 0 deletions packages/orchestrator/pkg/template/build/phases/base/provision.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -110,8 +110,10 @@ mkdir -p /etc/chrony
# host/KVM as the runtime sandboxes.
if [ -e /dev/ptp0 ]; then
echo "refclock PHC /dev/ptp0 poll 2 dpoll 2"
E2B_CHRONY_PHC=1
else
echo "pool pool.ntp.org iburst maxsources 3"
E2B_CHRONY_PHC=0
fi
# Step (jump) the clock instead of slewing when the offset exceeds 1s, but
# only for the first 3 updates after chronyd starts. chronyd restarts on
Expand All @@ -122,6 +124,20 @@ mkdir -p /etc/chrony
echo "makestep 1.0 3"
} >/etc/chrony/chrony.conf

# Alpine's OpenRC init script hardcodes `-F 1`, which loads chronyd's seccomp
# filter. Alpine's chrony build (-NTS -SECHASH -DEBUG) takes a SIGSYS —
# "Bad system call" right after "Loaded seccomp filter (level 1)" — as soon as
# the PHC refclock is driven, so the service lands in OpenRC's "crashed" state
# with the clock unsynced. The pool path is unaffected, and the systemd families
# pass no -F at all, so this only restores parity. The init script splices
# $command_args in after its own -F 1 and chronyd honours the last -F, so this
# turns the filter off.
if [ "$E2B_CHRONY_PHC" = 1 ] && [ "$E2B_INIT_SYSTEM" = "openrc" ]; then
echo "Disabling the chronyd seccomp filter (PHC refclock traps under it)"
mkdir -p /etc/conf.d
echo 'command_args="-F 0"' >>/etc/conf.d/chronyd
fi

# Add a proxy config, as some environments expects it there (e.g. timemaster in Node Dockerimage)
echo "include /etc/chrony/chrony.conf" >/etc/chrony.conf

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