`docker services ls`显示正在运行的服务,但docker ps-a`缺少正在运行的容器吗?其他丢失的运行容器列在哪里?

wordpress服务正在运行,由确认 docker service ls docker stack rm wordpress ).

docker stack deploy 堆栈如下所示:

user@prod:~/wordpress$ docker service ls
ID             NAME                  MODE         REPLICAS   IMAGE              PORTS
ph38i5su9slr   traefik_traefik       replicated   1/1        traefik:v2.4
yhu02cqufy8l   wordpress_db          replicated   1/1        mysql:5.7
v4q2ztqwv118   wordpress_wordpress   replicated   1/1        wordpress:latest

user@prod:~/wordpress$ docker ps -a
CONTAINER ID   IMAGE          COMMAND                  CREATED      STATUS      PORTS                                                                      NAMES
697cf6cfa806   traefik:v2.4   "/entrypoint.sh --pr…"   4 days ago   Up 4 days   0.0.0.0:80->80/tcp, :::80->80/tcp, 0.0.0.0:443->443/tcp, :::443->443/tcp   traefik_traefik.1.i4txtjd2p0rcbnpd3bkv54eo2

为什么wordpress容器没有显示在中 docker ps -a ?