OCI Image Resource helper
This is a helper for working with OCI image resources in the charm operator framework.
Installation
Add it to your requirements.txt. Since it's not in PyPI, you'll need to use
the GitHub archive URL (or git+ URL, if you want to pin to a specific commit):
https://github.com/juju-solutions/resource-oci-image/archive/master.zip
Usage
The OCIImageResource class will wrap the framework resource for the given
resource name, and calling fetch on it will either return the image info
or raise an OCIImageResourceError if it can't fetch or parse the image
info. The exception will have a status attribute you can use directly,
or a status_message attribute if you just want that.
Example usage:
from ops.charm import CharmBase
from ops.main import main
from oci_image import OCIImageResource, OCIImageResourceError
class MyCharm(CharmBase):
def __init__(self, *args):
super().__init__(*args)
self.image = OCIImageResource(self, 'resource-name')
self.framework.observe(self.on.start, self.on_start)
def on_start(self, event):
try:
image_info = self.image.fetch()
except OCIImageResourceError as e:
self.model.unit.status = e.status
event.defer()
return
self.model.pod.set_spec({'containers': [{
'name': 'my-charm',
'imageDetails': image_info,
}]})
if __name__ == "__main__":
main(MyCharm)
