Hey TF,  I might be quite late for the party, but myself was recently working with NiFi and Traefik and was able to access the UI successfully after a lot of struggle.  Please find the docker compose file I used to get my services up and running.  version: "3.7" services: # configuration manager for NiFi zookeeper: hostname: myzookeeper image: zookeeper:latest restart: on-failure environment: - ALLOW_ANONYMOUS_LOGIN=yes networks: - apache-nifi-internal deploy: restart_policy: condition: any delay: 5s max_attempts: 3 window: 120s nifi: user: root hostname: mynifi image: apache/nifi:latest restart: on-failure environment: - NIFI_WEB_HTTP_PORT=8443 - NIFI_WEB_HTTP_HOST=0.0.0.0 - NIFI_WEB_PROXY_CONTEXT_PATH=/ volumes: - nifi_database_repository:/opt/nifi/nifi-current/database_repository - nifi_flowfile_repository:/opt/nifi/nifi-current/flowfile_repository - nifi_content_repository:/opt/nifi/nifi-current/content_repository - nifi_provenance_repository:/opt/nifi/nifi-current/provenance_repository - nifi_state:/opt/nifi/nifi-current/state - nifi_logs:/opt/nifi/nifi-current/logs - nifi_conf:/opt/nifi/nifi-current/conf networks: - apache-nifi-internal - traefik_proxy deploy: labels: # traefik - traefik.enable=true # service - traefik.http.services.nifi-flow.loadbalancer.server.port=8443 # Routers - traefik.http.routers.nifi-flow.service=nifi-flow - traefik.http.routers.nifi-flow.entrypoints=$TRAEFIK_HTTPS_ENTRYPOINT - traefik.http.routers.nifi-flow.tls=true - traefik.http.routers.nifi-flow.rule=Host(`$DOCKER_HOST_URL`) && PathPrefix(`/nifi`) restart_policy: condition: any delay: 120s max_attempts: 3 window: 60s networks: traefik_proxy: external: true name: traefik_webgateway apache-nifi-internal: volumes: nifi_conf: {external: true} nifi_database_repository: {external: true} nifi_flowfile_repository: {external: true} nifi_content_repository: {external: true} nifi_provenance_repository: {external: true} nifi_state: {external: true} nifi_logs: {external: true} I am currently trying to make the NiFi instance secure and moving to HTTPS the above code will deploy the NiFi on unsecure mode that is HTTP.  ... View more