Add docker restart to upgrade process

There is a known intermittent bug with docker which breaks some of
its functions, such as downloading images [1].
The workaround is a service restart.

[1] https://bugs.launchpad.net/ubuntu/+source/docker.io/+bug/1950751

Test Plan:
PASS upgrade-activate updates apps with:
     - docker healthy (/var/lib/docker/tmp exists and service active)
     - docker unhealthy (/var/lib/docker/tmp deleted)

Closes-bug: 1999182

Signed-off-by: Leonardo Fagundes Luz Serrano <Leonardo.FagundesLuzSerrano@windriver.com>
Change-Id: Id68620d1814d390d26adb1a60569c74062b36a91

controllerconfig/controllerconfig/upgrade-scripts/40-assert-docker-health.sh

@@ -0,0 +1,51 @@
+#!/bin/bash
+#
+# Copyright (c) 2022 Wind River Systems, Inc.
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+# Sometimes docker will be in a bad state.
+# Check for this and use some recovery logic to get it back to normal.
+
+# Parameters for recovery logic
+MAX_ATTEMPTS=5
+TIME_STEP=6
+
+# The migration scripts are passed these parameters:
+NAME=$(basename $0)
+FROM_RELEASE=$1
+TO_RELEASE=$2
+ACTION=$3
+
+# This will log to /var/log/platform.log
+function log {
+    logger -p local1.info $1
+}
+
+# Script start
+if [[ "${ACTION}" != "activate" ]]; then
+    exit 0
+fi
+
+log "$NAME: Starting docker health check script from release $FROM_RELEASE to $TO_RELEASE with action $ACTION"
+
+# Docker is considered in a "bad state" if the service isn't active or
+# if "/var/lib/docker/tmp" doesn't exist, as it won't be able to download images
+attempts=0
+while [ "$(systemctl is-active docker)" != "active" ] || [ ! -d "/var/lib/docker/tmp" ]
+do
+    attempts=$(( $attempts + 1 ))
+    if [ "$attempts" -gt "$MAX_ATTEMPTS" ]; then
+        log "$NAME: Could not fix docker service."
+        exit 0
+    fi
+    log "$NAME: Docker in bad state. Restarting docker service. Attempt: $attempts/$MAX_ATTEMPTS"
+
+    systemctl restart docker
+
+    sleep $TIME_STEP
+done
+
+log "$NAME: Docker service is active and healthy"
+
+exit 0