Unable to modify image during preparation

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I am following this guide (https://access.redhat.com/documentation/en-us/red_hat_openstack_platform/14/pdf/director_installation_and_usage/Red_Hat_OpenStack_Platform-14-Director_Installation_and_Usage-en-US.pdf) for RHOSP 14 implementation. I am stuck at step no 3.6.

"While developing and testing the ContainerImagePrepare entries that modify images, it isrecommended to run the image prepare command without any additional options to confirm the imageis modified as expected:"

"sudo openstack tripleo container image prepare -e ~/containers-prepare-parameter.yaml"

The issue I am facing:

stack@director.example.com:/home/stack>sudo openstack tripleo container image prepare -e ~/containers-prepare-parameter.yaml
docker push failed: Put http://localhost:8787/v1/repositories/rhceph/rhceph-3-rhel7/: dial tcp [::1]:8787: connect: connection refused
docker push failed: Put http://localhost:8787/v1/repositories/rhceph/rhceph-3-rhel7/: dial tcp [::1]:8787: connect: connection refused
docker push failed: Put http://localhost:8787/v1/repositories/rhceph/rhceph-3-rhel7/: dial tcp [::1]:8787: connect: connection refused
docker push failed: Put http://localhost:8787/v1/repositories/rhceph/rhceph-3-rhel7/: dial tcp [::1]:8787: connect: connection refused
docker push failed: Put http://localhost:8787/v1/repositories/rhceph/rhceph-3-rhel7/: dial tcp [::1]:8787: connect: connection refused
Could not push image localhost:8787/rhceph/rhceph-3-rhel7
stack@director.example.com:/home/stack>

Please help.

AB

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