Each container in a Pod has a container image. Once you have created an image and pushed it to a registry, you can then refer to it in the Pod.
When Azure Red Hat OpenShift creates containers, it uses the container’s
imagePullPolicy
to determine if the image should be pulled prior to starting
the container. There are three possible values for imagePullPolicy
:
Value | Description |
---|---|
|
Always pull the image. |
|
Only pull the image if it does not already exist on the node. |
|
Never pull the image. |
If a container’s imagePullPolicy
parameter is not specified, Azure Red Hat OpenShift
sets it based on the image’s tag:
If the tag is latest
, Azure Red Hat OpenShift defaults imagePullPolicy
to Always
.
Otherwise, Azure Red Hat OpenShift defaults imagePullPolicy
to IfNotPresent
.