Resource and patch files could be loaded from http
DEMO_HOME=$(mktemp -d)
cat <<EOF >$DEMO_HOME/kustomization.yaml
resources:
- https://raw.githubusercontent.com/kubernetes-sigs/kustomize/master/examples/helloWorld/configMap.yaml
EOF
test 1 == \
$(kustomize build $DEMO_HOME | grep "Good Morning!" | wc -l); \
echo $?
Kustomize will try loading resource as a file either from local or http. If it fails, try to load it as a directory or git repository.
Http load applies to patches as well. See full example in loadHttp.