HEALTHCHECK NONE in Dockerfile same as not specifying
HEALTHCHECK in Dockerfile ?
I can't seem to find any documentation about this. Would appreciate any pointers around this
According to Docker reference documentation: https://docs.docker.com/engine/reference/builder/#healthcheck
HEALTHCHECK NONE (disable any healthcheck inherited from the base image)
So the answer in no - it is not the same. If you code the line in your
Dockerfile - you also disable (if present) any healthchecks provided from your base image.
So imagine you built your image on top of other image (suppose
node alpine), then- if
node alpine image would have
HEALTHCHECK ... configured in its
Dockerfile, then doing
HEALTHCHECK NONE in your dockerfile - disables the origin healthcheck.