import-export-keycloak-realms.txt

# export keycloak database into json file
docker exec -it mykeycloak /opt/jboss/keycloak/bin/standalone.sh -Djboss.socket.binding.port-offset=100 -Dkeycloak.migration.action=export -Dkeycloak.migration.provider=singleFile -Dkeycloak.migration.usersExportStrategy=REALM_FILE -Dkeycloak.migration.file=/tmp/my_realm.json

# copy file from container to local file system
docker cp <container>:<src-path> <local-dest-path>

# e.g.
docker cp mykeycloak:/tmp/my_realm.json ~/my_realm.json

# import json db file into keycloak
docker exec -it mykeycloak /opt/jboss/keycloak/bin/standalone.sh -Djboss.socket.binding.port-offset=100 -Dkeycloak.migration.action=import -Dkeycloak.migration.provider=singleFile -Dkeycloak.migration.file=/opt/jboss/keycloak/imports/my_realm.json