Pull latest coreos-installer image for agent appliance (#1655)

Author: zaneb

agent/06_agent_create_cluster.sh

@@ -59,7 +59,7 @@ function create_factory_image() {
     mkdir -p $HOME/.cache/agent/image_cache
     oc image extract --path /coreos/coreos-$(uname -m).iso:$HOME/.cache/agent/image_cache --registry-config "$PULL_SECRET_FILE" --confirm $base_iso_url
     local agent_iso_abs_path="$(realpath "${OCP_DIR}")"
-    podman run --privileged --rm -v /run/udev:/run/udev -v "${agent_iso_abs_path}:${agent_iso_abs_path}" -v "$HOME/.cache/agent/image_cache/:$HOME/.cache/agent/image_cache/" quay.io/coreos/coreos-installer:release iso ignition embed -f -i "${agent_iso_abs_path}/unconfigured-agent.ign" -o "${agent_iso_abs_path}/agent.iso" $HOME/.cache/agent/image_cache/coreos-$(uname -m).iso
+    podman run --pull=newer --privileged --rm -v /run/udev:/run/udev -v "${agent_iso_abs_path}:${agent_iso_abs_path}" -v "$HOME/.cache/agent/image_cache/:$HOME/.cache/agent/image_cache/" quay.io/coreos/coreos-installer:release iso ignition embed -f -i "${agent_iso_abs_path}/unconfigured-agent.ign" -o "${agent_iso_abs_path}/agent.iso" $HOME/.cache/agent/image_cache/coreos-$(uname -m).iso
 
     if [ "${AGENT_APPLIANCE_HOTPLUG}" != true ]; then
         create_config_image
@@ -182,7 +182,7 @@ function disable_automated_installation() {
   local ign_temp_path="$(mktemp --directory)"
   _tmpfiles="$_tmpfiles $ign_temp_path"
   echo "Extracting ISO ignition..."
-  podman run --privileged --rm -v /run/udev:/run/udev -v "${agent_iso_abs_path}:/data/agent.iso" -w /data  quay.io/coreos/coreos-installer:release iso ignition show agent.iso > "${ign_temp_path}/iso.ign"
+  podman run --pull=newer --privileged --rm -v /run/udev:/run/udev -v "${agent_iso_abs_path}:/data/agent.iso" -w /data  quay.io/coreos/coreos-installer:release iso ignition show agent.iso > "${ign_temp_path}/iso.ign"
 
   echo "disabling automated installation systemd services..."
   jq --compact-output --argjson filterlist '["apply-host-config.service", "create-cluster-and-infraenv.service", "install-status.service", "set-hostname.service", "start-cluster-installation.service"]' \