Deprecate chrony

Per [1].

[1] http://lists.openstack.org/pipermail/openstack-discuss/2021-February/020707.html

Change-Id: Ia3660574b4c6ba61e735d62c52a8d345de131a1f

README.rst

@@ -113,7 +113,7 @@ Infrastructure components
 Kolla provides images to deploy the following infrastructure components:
 
 - `Chrony <https://chrony.tuxfamily.org/>`__ a versatile implementation
-  of the Network Time Protocol (NTP).
+  of the Network Time Protocol (NTP) [deprecated].
 - `Collectd <https://collectd.org>`__,
   `InfluxDB <https://influxdata.com/time-series-platform/influxdb/>`__, and
   `Grafana <https://grafana.com>`__ for performance monitoring.

doc/source/matrix_aarch64.csv

@@ -5,7 +5,7 @@ barbican,C,C,C,C,N,C
 bifrost,N,C,N,N,N,N
 blazar,N,C,N,C,N,C
 ceilometer,C,C,C,C,N,C
-chrony,C,C,C,C,N,C
+chrony (deprecated),C,C,C,C,N,C
 cinder,C,C,C,C,N,C
 cloudkitty,C,C,N,C,N,C
 collectd,C,C,C,C,N,C

doc/source/matrix_x86.csv

@@ -5,7 +5,7 @@ barbican,C,T,C,C,C,C
 bifrost,N,T,N,C,N,N
 blazar,N,C,N,C,N,C
 ceilometer,C,C,C,C,C,C
-chrony,T,T,T,T,C,T
+chrony (deprecated),T,T,T,T,C,T
 cinder,C,T,C,T,C,C
 cloudkitty,C,C,N,C,N,C
 collectd,C,C,C,C,C,C

docker/chrony/Dockerfile.j2

@@ -3,6 +3,8 @@ FROM {{ namespace }}/{{ infra_image_prefix }}base:{{ tag }}
 LABEL maintainer="{{ maintainer }}" name="{{ image_name }}" build-date="{{ build_date }}"
 {% endblock %}
 
+# chrony image is deprecated
+
 {% block chrony_header %}{% endblock %}
 
 {% import "macros.j2" as macros with context %}

docker/chrony/extend_start.sh

@@ -1,5 +1,7 @@
 #!/bin/bash
 
+echo "chrony image is deprecated"
+
 rm -f /var/run/chronyd.pid
 
 CHRONY_LOG_DIR="/var/log/kolla/chrony"

releasenotes/notes/deprecate-chrony-5cd7c7627a5b9f0e.yaml

@@ -0,0 +1,4 @@
+---
+deprecations:
+  - |
+    The ``chrony`` image is deprecated and will be removed in the Xena cycle.