Add ntpdate/ntpclient/chrony

Adds ntpdate to the binary package list for the diskimage-builder
element, and added ntpclient to the tinycore package list and added
a small shim to wrap ntpclient as ntpdate is not a native tinycore
package.

For larger ramdisks, we attempt to use chrony, which superceeds the ntp
package as a combined time server and client.

Change-Id: If99f2df31af8e4d41ad7813d25f0d779abc23f7a
Needed-By: https://review.opendev.org/#/c/707911/

dib/ironic-python-agent-ramdisk/package-installs.yaml

@@ -20,6 +20,7 @@ dosfstools:
 mdadm:
 efibootmgr:
 efivar:
+chrony:
 
 # Unnecessary packages to remove. We run all removals in pre-install phase, to
 # avoid breaking installs that happen in install phase.

releasenotes/notes/add-ntpdate-3db2f8565fed761e.yaml

@@ -0,0 +1,7 @@
+---
+features:
+  - |
+    Adds packages required for ``ironic-python-agent`` to
+    synchronize the system clock, namely ntpdate. The other
+    dependency of the agent requires is ``hwclock``, however
+    that package is provided by util-linux.

tinyipa/build-tinyipa.sh

@@ -154,6 +154,8 @@ $CHROOT_CMD chmod a+rwx /etc/sysconfig/tcuser
 mkdir $BUILDDIR/tmp/overides
 cp $WORKDIR/build_files/fakeuname $BUILDDIR/tmp/overides/uname
 
+sudo cp $WORKDIR/build_files/ntpdate $BUILDDIR/bin/ntpdate
+
 PY_REQS="buildreqs_python2.lst"
 if [[ $USE_PYTHON3 == "True" ]]; then
     PY_REQS="buildreqs_python3.lst"

tinyipa/build_files/finalreqs.lst

@@ -21,3 +21,4 @@ filesystems-4.14.10-tinycore64.tcz
 smartmontools.tcz
 udev-lib.tcz
 util-linux.tcz
+ntpclient.tcz

tinyipa/build_files/ntpdate

@@ -0,0 +1,6 @@
+#!/bin/sh
+if [  "$1" = "-v" ]; then
+    echo "Magical ntpdate Wrapper 0.0.1"
+    exit 0
+fi
+ntpclient -h $1 -s

tinyipa/finalise-tinyipa.sh

@@ -92,6 +92,8 @@ fi
 mkdir $FINALDIR/tmp/overides
 cp $WORKDIR/build_files/fakeuname $FINALDIR/tmp/overides/uname
 
+sudo cp $WORKDIR/build_files/ntpdate $FINALDIR/bin/ntpdate
+sudo chmod 755 $FINALDIR/bin/ntpdate
 PY_REQS="finalreqs_python2.lst"
 if [[ $USE_PYTHON3 == "True" ]]; then
     PY_REQS="finalreqs_python3.lst"