Documentation for the --interval flag of the HEALTHCHECK instruction is incorrect #24096
Description
Is this a docs issue?
- My issue is about the documentation content or website
Type of issue
Information is incorrect
Description
According to https://docs.docker.com/reference/dockerfile/#healthcheck :
The health check will first run interval seconds after the container is started, and then again interval seconds after each previous check completes.
(Italics mine)
This doesn't appear to be accurate - by my testing, the health check runs immediately* upon container startup (and then runs again interval seconds after each previous check completes).
*Technically I think the health check may run --start-interval seconds after container startup (defaults to 5 seconds). So the corrected docs perhaps should read:
The health check will first run start-interval seconds after the container is started, and then again interval seconds after each previous check completes.
But I haven't tested --start-interval extensively. (--interval definitely doesn't work exactly as documented, however.)
Location
https://docs.docker.com/reference/dockerfile/#healthcheck
Suggestion
No response