Download preloadImages option not to download the same images.

For AirGap environment, images need to be downloaded.
./cpd-linux preloadImages --repo ../repo.yaml --assembly lite --action download
./cpd-linux preloadImages --repo ../repo.yaml --assembly wkc --action download
./cpd-linux preloadImages --repo ../repo.yaml --assembly wml --action download
and so on

Each services include the same images with Lite. For example, WKC includes the same images as follows. The size of the images will be 5.3 GB.

Lite :  
[root@macpd-lb-1 lite]# ls ./assembly/lite/x86_64/v2.5.0.0/images
cp4d-tiller-----v2.14.3.tar
cpd-operator-init-----v1.tar
cpdoperator-----v2.5.0.0-29.tar
icp4d-api-----v2.5.0.0-210.tar
icp4data-nginx-repo-----v2.5.0.0-210.tar
icpd-requisite-----v2.5.0.0-210.tar
influxdb-----v2.5.0.0-210.tar
privatecloud-redis-repo-----v2.5.0.0-210.tar
privatecloud-usermgmt-----v2.5.0.0-210.tar
zen-admin-----v2.5.0.0-210.tar
zen-content-----v2.5.0.0-210.tar
zen-core-api-----v2.5.0.0-210.tar
zen-core-----v2.5.0.0-210.tar
zen-data-sorcerer-----v2.5.0.0-210.tar
zen-meta-couchdb-----v2.5.0.0-210.tar
zen-metastoredb-----v2.5.0.0-210.tar
zen-watchdog-----v2.5.0.0-210.tar


WKC :
[root@macpd-lb-1 wkc]# ls ./assembly/wkc/x86_64/3.0.333/images
asset-files-api-----v2.1.0_051119.tar
audit-trail-service-----b122_2bc7856f940e.tar
cassandra-ubi-----3.11.3.tar
catalog_master-----2.0.0-20191030004426-9bd7d3f.tar
couchdb3-----preview-1571742405.tar
cp4d-tiller-----v2.14.3.tar
cp4d-ws-secrets-job-----v2.1.0_051119.tar
cpd-operator-init-----v1.tar
cpdoperator-----v2.5.0.0-29.tar
dap-dashboards-api-----v2.1.0_051119.tar
dataconn-engine-opdiscovery-----1.0.269.tar
dataconn-engine-service-----3.0.1507.tar
dataconn-engine-spark-cluster-----3.0.1507.tar
dc-main-----v0.1.257.tar
dsx-requisite-----v1.0.811-x86_64.tar
elasticsearch-----7.2.1-27.tar
environments-----2.1.201.tar
environments-init-job-----2.1.201-960.tar
finley-----finley_59eec20.tar
gov-admin-ui-----b461_d296767c0764.tar
gov-app-config-service-----b358_4b2bfec02191.tar
gov-catalog-search-index-----b165_d58844393bf4.tar
gov-catalog-search-service-----b830_c9b04697fb60.tar
gov-enterprise-search-ui-----b889_9e6c65a348cc.tar
gov-insights-service-----b388.tar
gov-quality-ui-----b4568_795b2d9d04be.tar
gov-ui-commons-----b231_e9bfade5b6cd.tar
gov-user-prefs-service-----b220_ec764cea85b5.tar
gremlin-console-ubi-----0.4.0.tar
haproxy-----1.9-14.tar
haproxy-----v1.0.39-x86_64.tar
ia-analysis-----b611_09ff7135c76c.tar
ia-rest-endpoint-----b611_09ff7135c76c.tar
ia-services-----b611_09ff7135c76c.tar
icp4d-api-----v2.5.0.0-210.tar
icp4data-nginx-repo-----v2.5.0.0-210.tar
icpd-requisite-----v2.5.0.0-210.tar
igc-ui-react-----b6854_337769a42005.tar
influxdb-----v2.5.0.0-210.tar
is-db2xmeta-image-----b4-cypress-b6.tar
is-en-compute-image-----b4-cypress-b6.tar
is-engine-image-----b4-cypress-b6.tar
is-services-image-----b4-cypress-b6.tar
jobs-api-----v2.1.0_281019.tar
jobs-ui-----v2.1.0_281019.tar
job-trigger-----v2.1.0_281019.tar
kafka-ubi-----2.11-2.1.1.tar
knol-----wkc-164.tar
metadata-api-server-x86_64-----1.0.70.tar
metadata-discovery-----1.0.792.tar
metadata-engine-x86_64-----1.0.2169.tar
ngp-projects-api-----v2.1.0_051119.tar
nlq-search-----0.10.43.tar
nlq-search-extractor-----0.10.43.tar
odf-fast-analyzer-kube-----j214-bd363cac2077.tar
omag-----b1112_92885904251a.tar
portal-catalog-----v0.1.358.tar
portal-common-api-----v2.1.0_051119.tar
portal-dashboards-----v2.1.0_051119.tar
portal-job-manager-----v2.1.0_051119.tar
portal-main-----v2.1.0_051119.tar
portal-notifications-----v2.1.0_051119.tar
privatecloud-dsx-hi-proxy-----v3.13.1026-x86_64.tar
privatecloud-redis-repo-----v2.5.0.0-210.tar
privatecloud-spawner-api-k8s-----v3.13.1068-x86_64.tar
privatecloud-usermgmt-----v2.5.0.0-210.tar
privatecloud-utils-api-----v3.13.56-x86_64.tar
rabbitmq-----3.7.16-57.tar
redis-----5.0.5-53.tar
shaper-preinstall-----0.0.387-x86_64.tar
shaper-server-----0.0.387-x86_64.tar
shop4info-event-consumer-----b1234_c639201fc3b8.tar
shop4info-mappers-service-----b1234_c639201fc3b8.tar
shop4info-rest-----b1234_c639201fc3b8.tar
shop4info-scheduler-----b1234_c639201fc3b8.tar
shop4info-schema-init-----b1234_c639201fc3b8.tar
shop4info-type-registry-service-----b1234_c639201fc3b8.tar
solr-ubi-----8.1.0.tar
wdp-activities-----1.0.734.tar
wdp-connect-connection-----1.0.1100.tar
wdp-connect-connector-----1.0.1100.tar
wdp-dataprep-----1.0.611-x86_64.tar
wdp-db2-----11.5.0.0a.tar
wdp-lineage-----0.0.647.tar
wdp-policy-service-----3.0.80.tar
wdp-profiling-----1.0.590.tar
wdp-profiling-messaging-----1.0.186.tar
wdp-profiling-ui-----1.0.278.tar
wdp-search-----1.0.365.tar
wdp-shaper-----1.0.794-x86_64.tar
wkc-glossary-service-----2.0.421.tar
wkc-gov-ui-----2.0.606.tar
wkc-init-container-----1.0.44.tar
wkc-search_master-----1.0.58.tar
wkc-ugconfig-----3.0.16.tar
wkc-workflow-service-----2.0.210.tar
zen-admin-----v2.5.0.0-210.tar
zen-content-----v2.5.0.0-210.tar
zen-core-api-----v2.5.0.0-210.tar
zen-core-----v2.5.0.0-210.tar
zen-data-sorcerer-----v2.5.0.0-210.tar
zen-meta-couchdb-----v2.5.0.0-210.tar
zen-metastoredb-----v2.5.0.0-210.tar
zen-watchdog-----v2.5.0.0-210.tar
zookeeper-ubi-----3.4.12.tar