From fb82b8b18991355705fc6c7270b1a57a1422f33b Mon Sep 17 00:00:00 2001
From: Yu Qi Zhang <jzehrarnyg@gmail.com>
Date: Mon, 27 Feb 2017 16:40:32 +0000
Subject: [PATCH] Update flannel to use sd-notify

Remove hacky loop to check for Docker configs, and update to use
sd-notify instead to alert systemd when flannel is ready.

Signed-off-by: Yu Qi Zhang <jerzhang@redhat.com>

Closes: #24
Approved by: giuseppe
---
 flannel/flanneld-run.sh  | 4 +++-
 flannel/service.template | 3 ++-
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/flannel/flanneld-run.sh b/flannel/flanneld-run.sh
index 5303a90..fbd97e0 100755
--- a/flannel/flanneld-run.sh
+++ b/flannel/flanneld-run.sh
@@ -7,7 +7,7 @@ echo "EnvironmentFile=-/run/$NAME/docker" >> /etc/systemd/system/docker.service.
 # Ensure this file doesn't already exist.
 rm -f run/flannel/subnet.env
 
-/usr/bin/flanneld &
+NOTIFY_SOCKET=/dev/null /usr/bin/flanneld &
 child=$!
 
 while test \! -e /run/flannel/subnet.env
@@ -17,4 +17,6 @@ done
 
 /usr/libexec/flannel/mk-docker-opts.sh -k DOCKER_NETWORK_OPTIONS -d /run/flannel/docker
 
+systemd-notify --ready
+
 wait $child
diff --git a/flannel/service.template b/flannel/service.template
index d25dc8c..b6a2883 100644
--- a/flannel/service.template
+++ b/flannel/service.template
@@ -7,9 +7,10 @@ After=$AFTER
 Before=docker.service
 
 [Service]
+Type=notify
+NotifyAccess=all
 ExecStart=$EXEC_START
 ExecStop=$EXEC_STOP
-ExecStartPost=/usr/bin/sh -c "while test \! -s ${RUN_DIRECTORY}/${NAME}/docker; do sleep 0.1; done"
 ExecStopPost=/bin/rm /etc/systemd/system/docker.service.d/$NAME.conf
 Restart=on-failure
 WorkingDirectory=$DESTDIR