Agent installer fails to generate image for arm64 as the installer is unable to download the coreos-aarch64.iso.

4.13

100%

1. Prepare install-config.yaml and agent-config.yaml file for arm64
2. Execute openshift-install agent create image to generate arm64 image

install-config.yaml
apiVersion: v1
baseDomain: test.example.com
compute:
- architecture: arm64
  hyperthreading: Enabled
  name: worker
  replicas: 1
controlPlane:
  architecture: arm64
  hyperthreading: Enabled
  name: master
  replicas: 3
metadata:
  name: three-plus-one
networking:
  clusterNetwork:
  - cidr: 10.128.0.0/14
    hostPrefix: 23
  machineNetwork:
  - cidr: 192.168.111.0/23
  networkType: OVNKubernetes
  serviceNetwork:
  - 172.30.0.0/16
--------------------------------------------------
agent-config.yaml
apiVersion: v1beta1
kind: AgentConfig
rendezvousIP: 192.168.111.10

It fails to generate image with below error: 

INFO Extracting base ISO from release payload     
DEBUG Fetching image from OCP release (oc adm release info --image-for=machine-os-images --insecure=true registry.ci.openshift.org/ocp/release@sha256:ed6b71bcf1d59871022888e4e98177909e406f45aafa18a8f988a030fc4e0952) 
DEBUG extracting /coreos/coreos-aarch64.iso to /root/.cache/agent/image_cache, oc image extract --path /coreos/coreos-aarch64.iso:/root/.cache/agent/image_cache --confirm quay.io/openshift-release-dev/ocp-v4.0-art-dev@sha256:a2bb27edec05dcd2be2bf7fc58e709439778eabf4d1ae8ea257864c9251d93d3 
INFO Base ISO obtained from release and cached at /root/.cache/agent/image_cache/coreos-aarch64.iso 
DEBUG Extracted base ISO image /root/.cache/agent/image_cache/coreos-aarch64.iso from release payload 
DEBUG   Fetching Agent Manifests...                
DEBUG   Reusing previously-fetched Agent Manifests 
DEBUG   Fetching Mirror Registries Config...       
DEBUG   Reusing previously-fetched Mirror Registries Config 
DEBUG Generating Agent Installer ISO...            
DEBUG Fetching image from OCP release (oc adm release info --image-for=agent-installer-node-agent --insecure=true registry.ci.openshift.org/ocp/release@sha256:ed6b71bcf1d59871022888e4e98177909e406f45aafa18a8f988a030fc4e0952) 
DEBUG extracting /usr/bin/agent-tui to /root/.cache/agent/files_cache, oc image extract --path /usr/bin/agent-tui:/root/.cache/agent/files_cache --confirm quay.io/openshift-release-dev/ocp-v4.0-art-dev@sha256:56e1e36239320c470be920528622bd8e674676131b41dd4cf8bdfcd20fa898b0 
DEBUG Fetching image from OCP release (oc adm release info --image-for=agent-installer-node-agent --insecure=true registry.ci.openshift.org/ocp/release@sha256:ed6b71bcf1d59871022888e4e98177909e406f45aafa18a8f988a030fc4e0952) 
DEBUG extracting /usr/lib64/libnmstate.so.1.3.3 to /root/.cache/agent/files_cache, oc image extract --path /usr/lib64/libnmstate.so.1.3.3:/root/.cache/agent/files_cache --confirm quay.io/openshift-release-dev/ocp-v4.0-art-dev@sha256:56e1e36239320c470be920528622bd8e674676131b41dd4cf8bdfcd20fa898b0 
ERROR failed to write asset (Agent Installer ISO) to disk: cannot generate ISO image due to configuration errors 
FATAL failed to fetch Agent Installer ISO: failed to generate asset "Agent Installer ISO": provided device /root/.cache/agent/image_cache/coreos-aarch64.iso does not exist 

agent.arm64 ISO should be created successfully.