Use a ping to wait for mssqlserver or to check its health

Author: GRUNENWALD Florian

Dockerfile

@@ -14,6 +14,6 @@ RUN chmod +x /usr/config/configure-db.sh
 ENTRYPOINT ["./entrypoint.sh"]
 
 # Tail the setup logs to trap the process
-CMD ["tail -f /var/opt/mssql/log/errorlog*"]
+CMD ["tail -f /dev/null"]
 
-HEALTHCHECK --interval=15s CMD grep -q "MSSQL CONFIG COMPLETE" ./config.log
+HEALTHCHECK --interval=15s CMD /opt/mssql-tools/bin/sqlcmd -U sa -P $SA_PASSWORD -Q "select 1" && grep -q "MSSQL CONFIG COMPLETE" ./config.log

configure-db.sh

@@ -1,14 +1,20 @@
 #!/bin/bash
 
 # wait for MSSQL server to start
-export STATUS=0
+export STATUS=1
 i=0
-while [[ $STATUS -eq 0 ]] || [[ $i -lt 30 ]]; do
-	sleep 1
+
+while [[ $STATUS -ne 0 ]] && [[ $i -lt 30 ]]; do
 	i=$i+1
-	STATUS=$(grep 'Recovery is complete' /var/opt/mssql/log/errorlog* | wc -l)
+	/opt/mssql-tools/bin/sqlcmd -t 1 -U sa -P $SA_PASSWORD -Q "select 1" >> /dev/null
+	STATUS=$?
 done
 
+if [ $STATUS -ne 0 ]; then 
+	echo "Error: MSSQL SERVER took more than thirty seconds to start up."
+	exit 1
+fi
+
 echo "======= MSSQL SERVER STARTED ========" | tee -a ./config.log
 # Run the setup script to create the DB and the schema in the DB
 /opt/mssql-tools/bin/sqlcmd -S localhost -U sa -P $SA_PASSWORD -d master -i setup.sql