main,smoke: run in private netns

Since commits c561b28 ("infra: sync iface addresses to per-VRF
gr-loopX so kernel can bind") and 391f9fa ("infra: create VRF and
default route for each loopback interface"), addresses and default
routes are synchronized on the gr-loop0 Linux tun interface.

These elements can clash with local addresses in the default namespace.

To ensure smooth operation, always run grout in its own namespace.
Update the systemd service and smoke tests accordingly.

Signed-off-by: Robin Jarry <rjarry@redhat.com>

Author: rjarry

main/grout.service

@@ -13,6 +13,7 @@ EnvironmentFile=-/etc/default/grout
 ExecStartPre=/usr/bin/udevadm settle
 ExecStart=/usr/bin/grout $GROUT_OPTS
 ExecStartPost=/usr/bin/grcli -xef /etc/grout.init
+PrivateNetwork=true
 
 [Install]
 WantedBy=multi-user.target

smoke/run.sh

@@ -28,6 +28,10 @@ if [ -n "${builddir+x}" ] && \
 	test_frr=true
 fi
 
+ip netns del grout 2>/dev/null || :
+ip netns add grout
+trap "ip netns del grout" EXIT
+
 for script in $here/*_test.sh; do
 	name=$(basename $script)
 	case "$name" in
@@ -42,20 +46,10 @@ for script in $here/*_test.sh; do
 
 	{
 		echo "====================================================="
-		echo "+ $script $builddir"
-		if ! "$script" "$builddir"; then
+		echo "+ ip netns exec grout $script $builddir"
+		if ! ip netns exec grout "$script" "$builddir"; then
 			res=FAILED
 		fi
-		for core in /tmp/grout-core.*.*; do
-			[ -s "$core" ] || continue
-			binary=$(file -b "$core" | sed -En "s/.*, execfn: '([^']+)',.*/\\1/p")
-			[ -x "$binary" ] || continue
-			gdb -ex 'info threads' \
-				-ex 'thread apply all bt full' \
-				-ex 'quit' \
-				"$binary" -c "$core" || true
-			rm -f "$core"
-		done
 		end=$(date +%s)
 		duration=$(date -d "@$((end - start))" "+%Mm%Ss")
 		echo "-----------------------------------------------------"