From 76d5223c9a99a54621b87872db8db786c9fcb684 Mon Sep 17 00:00:00 2001
From: shlomibitton <60430976+shlomibitton@users.noreply.github.com>
Date: Tue, 10 Aug 2021 14:22:58 +0300
Subject: [PATCH] [hostcfgd] Delay hostcfgd and aaastatsd for faster boot time
 (#7965)

#### Why I did it
hostcfgd is starting at the same time as 'create_switch' method is called on orchagent process.
This introduce a degradation on the function execution time which eventually cause the fast-boot flow and a boot scenarion in general to run slower (~6 seconds).
This change will delay the start time of this daemon.
The aaastatsd will delay as well since it has a dependency on hostcfgd, so it is required to delay both.
90 seconds determined as the maximum allowed downtime for control plane to come back up on fast-boot flow.

#### How I did it
Add two timers for hostcfgd and aaastatsd  services in order to delay the startup of these services.

#### How to verify it
Install an image with this change and observe the daemons start 90 seconds after the system boot.
---
 .../debian/sonic-host-services-data.aaastatsd.service |  3 ---
 .../debian/sonic-host-services-data.aaastatsd.timer   | 11 +++++++++++
 .../debian/sonic-host-services-data.hostcfgd.service  |  3 ---
 .../debian/sonic-host-services-data.hostcfgd.timer    | 11 +++++++++++
 4 files changed, 22 insertions(+), 6 deletions(-)
 create mode 100644 src/sonic-host-services-data/debian/sonic-host-services-data.aaastatsd.timer
 create mode 100644 src/sonic-host-services-data/debian/sonic-host-services-data.hostcfgd.timer

diff --git a/src/sonic-host-services-data/debian/sonic-host-services-data.aaastatsd.service b/src/sonic-host-services-data/debian/sonic-host-services-data.aaastatsd.service
index b03c6a9551c0..b93fe92c04ed 100644
--- a/src/sonic-host-services-data/debian/sonic-host-services-data.aaastatsd.service
+++ b/src/sonic-host-services-data/debian/sonic-host-services-data.aaastatsd.service
@@ -12,6 +12,3 @@ Restart=on-failure
 RestartSec=10
 TimeoutStopSec=3
 
-[Install]
-WantedBy=sonic.target
-
diff --git a/src/sonic-host-services-data/debian/sonic-host-services-data.aaastatsd.timer b/src/sonic-host-services-data/debian/sonic-host-services-data.aaastatsd.timer
new file mode 100644
index 000000000000..e0458ff326f5
--- /dev/null
+++ b/src/sonic-host-services-data/debian/sonic-host-services-data.aaastatsd.timer
@@ -0,0 +1,11 @@
+[Unit]
+Description=Delays aaastatsd daemon until SONiC has started
+PartOf=aaastatsd.service
+
+[Timer]
+OnActiveSec=1min 30 sec
+Unit=aaastatsd.service
+
+[Install]
+WantedBy=timers.target sonic.target
+
diff --git a/src/sonic-host-services-data/debian/sonic-host-services-data.hostcfgd.service b/src/sonic-host-services-data/debian/sonic-host-services-data.hostcfgd.service
index 4adf2aba77ad..5e2434527124 100644
--- a/src/sonic-host-services-data/debian/sonic-host-services-data.hostcfgd.service
+++ b/src/sonic-host-services-data/debian/sonic-host-services-data.hostcfgd.service
@@ -9,6 +9,3 @@ After=sonic.target
 Type=simple
 ExecStart=/usr/local/bin/hostcfgd
 
-[Install]
-WantedBy=sonic.target
-
diff --git a/src/sonic-host-services-data/debian/sonic-host-services-data.hostcfgd.timer b/src/sonic-host-services-data/debian/sonic-host-services-data.hostcfgd.timer
new file mode 100644
index 000000000000..baf80f4b4cbd
--- /dev/null
+++ b/src/sonic-host-services-data/debian/sonic-host-services-data.hostcfgd.timer
@@ -0,0 +1,11 @@
+[Unit]
+Description=Delays hostcfgd daemon until SONiC has started
+PartOf=hostcfgd.service
+
+[Timer]
+OnActiveSec=1min 30 sec
+Unit=hostcfgd.service
+
+[Install]
+WantedBy=timers.target sonic.target
+