metrics/init/metrics_daemon.conf

# Copyright 2014 The ChromiumOS Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

description     "Metrics collection daemon"
author          "chromium-os-dev@chromium.org"

# The metrics daemon is responsible for receiving and forwarding to
# chrome UMA statistics not produced by chrome.

# Wait for the crash reporter to check whether the previous session
# ended abnormally.
start on stopped crash-boot-collect
stop on stopping system-services
respawn

# metrics will update the next line to add -uploader for embedded builds.
env DAEMON_FLAGS=""

# Make the metrics daemon killable, because if it has a leak it's better to
# restart it than to OOM-panic.
oom score 0
# Let the daemon crash if it grows too much.  "as" is "address space" (vm
# size).  We expect a typical VM size of about 30MB for the daemon.
limit as 150000000 unlimited

expect fork
pre-start script
  # Remove metrics_daemon files with bad permissions. systemd-tmpfiles will not
  # correct the permissions and ownership
  # (https://github.com/systemd/systemd/issues/19618), so the easiest thing to
  # do is delete the files and let metrics_daemon recreate the files with the
  # correct owner/permission.
  (/usr/bin/find /var/lib/metrics \( -name 'Platform.*' -o -name '*.cycle' \) \
   \( -not -user metrics -o -not -group metrics -o -not -perm 644 \) \
   -delete -print 2>&1 | logger -t metrics-init-cleanup) || true
end script

exec minijail0 --config /usr/share/minijail/metrics_daemon.conf \
  /usr/bin/metrics_daemon --nodaemon ${DAEMON_FLAGS}