I wanted to debug something in a single docker image, I thought the process will be very simple,
I uploaded the docker image from gravity shell using
docker import patch.tar
docker tag d870d2c96d18 leader.telekube.local:5000/imagename:da8879733
docker push leader.telekube.local:5000/imagename:da8879733
but when the container runs it pulls the old image back, is there a way to push an image to gravity registry, or usually how can we patch something?
The easiest method is generally to host the image on another registry, and update the objects to point to that build registry, instead of the local one.
In order to import an image into the local registry, you need to make sure you’re not using a tag that conflicts with one from the application. Gravity-site re-syncs the docker registries with the images from the application every minute, so it’s expected that it will overwrite any changes back to the image specified at build time.
A limitation of this approach also, is in a multi-master cluster, if there is a failover for any reason, leader.telekube.local will point to a registry on a different node, which won’t have you’re new image:tag. If a new master is added or an existing master replaced, it also won’t have the manually added images.