I actually have been stuck at waiting for the database to be ready before launching services. Am using docker-compose.yml with NodeJS. Am using wait-on and all my connections happen through links nats://nats:4222, redis://redis:6379/2 and mysql:3306. How do use the wait-on package to wait for these services before bootstrapping the service. Any help would be greatly appreciated, thanks!
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lulliezy
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You can use depends_on in your docker-compose.yml
https://docs.docker.com/compose/compose-file/#depends_on
It will wait your dbs to be started before starting your app
Ajouve
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That documentation link explicitly says: "`depends_on` does not wait for [its dependencies] to be "ready" before starting [the container] - only until they have been started." You generally need some kind of "wait" tool, or for your application to tolerate the database being temporarily unavailable. – David Maze May 21 '20 at 10:22