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Introduction
Users frequently perform patching of hosts used by a JS7 environment.
Impact Check Script
The script is a stub that can be adjusted and applied for frequently used operations:
- The script is available for Linux and MacOS® using bash shell.
- The script terminates with exit code 0 to signal that the there will not be a fatal impact of the outage scenario, other exit codes signal fatal impact on JS7 scheduling operation.
- The script is intended as a baseline example for customization by JS7 users and by SOS within the scope of professional services. Examples make use of JS7 Release 2.7.2, bash 4.2.
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#!/bin/bash
# set common options for connection to the JS7 REST Web Service
request_options=(--url=http://joc-2-0-primary.sos:7446 --user=root --password=root --ca-cert=./root-ca.crt --controller-id=controller --agent-cluster)
# hosts to be patched
hosts=(joc-2-0-primary joc-2-0-secondary controller-2-0-primary controller-2-0-secondary diragent-2-0-primary diragent-2-0-secondary)
# max. number of tries
tries=3
# delay in seconds between retries
delay=10
for host in "${hosts[@]}"; do
echo "--------------------------------------------------------"
echo "CHECKING SHUTDOWN IMPACT OF HOST: $host"
echo "--------------------------------------------------------"
try=1
while [ "$try" -le "$tries" ]; do
echo ""
echo "TRY $try/$tries: ./bin/operate-joc.sh health-check "${request_options[@]}" --whatif-shutdown=$host"
echo ""
./bin/operate-joc.sh health-status "${request_options[@]}" --whatif-shutdown="$host"
rc=$?
echo -n ""
case "$rc" in
0) break;
;;
3) sleep "$delay"
;;
*) exit "$rc"
;;
esac
try=$((try+1))
done
if [ "$rc" -eq 0 ]
then
echo "PATCH CAN BE APPLIED TO HOST: $host"
# add your code for patching
else
echo "PATCH CANNOT BE APPLIED TO HOST: $host"
exit "$rc"
fi
echo ""
done |
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