meta-google: gbmc-bridge: Terminate DHCP after reachable
We don't want to continue running DHCP after a machine is ready to serve
traffic. We will only run the DHCP process for a short amount of time if
we can determine that the BMC can reach network services because it was
already correctly configured.
Change-Id: Ie79e0582718af88a4a170b2a77beebfbadd5d0af
Signed-off-by: William A. Kennington III <wak@google.com>
diff --git a/meta-google/recipes-google/networking/gbmc-bridge/gbmc-br-dhcp-term.sh b/meta-google/recipes-google/networking/gbmc-bridge/gbmc-br-dhcp-term.sh
new file mode 100644
index 0000000..29fbbde
--- /dev/null
+++ b/meta-google/recipes-google/networking/gbmc-bridge/gbmc-br-dhcp-term.sh
@@ -0,0 +1,31 @@
+#!/bin/bash
+# Copyright 2022 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Wait until a well known service is network available
+echo "Waiting for network reachability" >&2
+while ! ping -c 1 -W 1 2001:4860:4860::8888 >/dev/null 2>&1; do
+ sleep 1
+done
+wait_min=5
+echo "Network is reachable, waiting $wait_min minutes" >&2
+# Wait 5 minutes for any potential DHCP that hasn't landed yet
+sleep $((60 * wait_min))
+# If the DHCP configuration process is running, wait for it to finish
+if pid="$(cat /run/gbmc-br-dhcp.pid 2>/dev/null)"; then
+ echo "DHCP still running ($pid), waiting" >&2
+ wait "$pid"
+fi
+echo "Stopping DHCP processing" >&2
+systemctl stop --no-block gbmc-br-dhcp