MySQL InnoDB Cluster Consul check

check_mysql.sh

# script used in consul
# the following addition to sys is required: 
#   https://gist.github.com/lefred/153448f7ea0341d6d0daa2738db6fcd8
# v.0.1 - lefred 2018-02-14


read -r mysql_primary mysql_readonly mysql_tx mysql_cert <<<$(mysql -h 127.0.0.1 -P 6446 -BNe "select * from sys.gr_member_routing_candidate_status")

if [[ "${mysql_primary}" == "YES" ]] && [[ "${mysql_readonly}" == "NO" ]]
then
 echo "MySQL InnoDB Cluster is fine"
 exit 0
fi
echo "MySQL InnoDB Cluster is not OK (Primary: ${mysql_primary}, R/O: ${mysql_readonly})"
exit 2