Spring Boot

Health Check

https://blog.jayway.com/2014/07/22/spring-boot-custom-healthindicator/

test with curl

curl -sSf http://localhost:8888/health -o /dev/null || echo "website down"

will echo "website down" if healthcheck is not UP

curl -sSf http://localhost:8888/health -o /dev/null || exit 1

test with wget

wget -q http://localhost:8880/health || echo "down"

will echo "down" if is not UP

will exit with error status if healthcheck is not UP

It is possible to change the HTTP status codes of the /health response. By default, if the status is Status.DOWN or Status.OUT_OF_SERVICE HTTP status 503 - Service Unavailable will be returned. (Please note that in Spring Boot versions <= 1.1.4, there is a bug that will cause 200 - OK to be returned by default.)

because of error codes it will cause a curl fail state

mongo

nosql db: https://docs.spring.io/spring-boot/docs/current/reference/html/boot-features-nosql.html

modify host

spring.data.mongodb.host=mongodbhost

properties

command line properties: https://docs.spring.io/spring-boot/docs/current/reference/html/boot-features-external-config.html#boot-features-external-config-command-line-args