我们正在openshift中运行rabbitmq 3.8.0版，并尝试启用prometheus来监控我们的rabbitmq集群。根据rabbitmq文档，rabbitmq 3.8.0版默认附带了prometheus插件。
但是，当我们尝试启用普罗米修斯插件，我们得到插件找不到错误如下.

I have no name!@rabbitmq-ss-0:/opt/rabbitmq$ rabbitmq-plugins enable rabbitmq_prometheus
rabbitmq_prometheus
Error:
{:plugins_not_found, [:prometheus_rabbitmq_exporter]}

I have no name!@rabbitmq-ss-0:/opt/rabbitmq$ rabbitmq-plugins directories
Plugin archives directory: /opt/rabbitmq/plugins

I have no name!@rabbitmq-ss-0:/opt/rabbitmq$ ls -l /opt/rabbitmq/plugins | grep prometheus
-rw-r--r--. 1 rabbitmq rabbitmq  219054 Oct  1 09:27 prometheus-4.4.0.ez
-rw-r--r--. 1 rabbitmq rabbitmq   42180 Oct  1 09:27 rabbitmq_prometheus-3.8.0.ez
I have no name!@rabbitmq-ss-0:/opt/rabbitmq$

请查看插件列表的结果。

[  ] rabbitmq_amqp1_0                  3.8.1
[  ] rabbitmq_auth_backend_cache       3.8.1
[  ] rabbitmq_auth_backend_http        3.8.1
[  ] rabbitmq_auth_backend_ldap        3.8.1
[  ] rabbitmq_auth_backend_oauth2      3.8.1
[  ] rabbitmq_auth_mechanism_ssl       3.8.1
[  ] rabbitmq_consistent_hash_exchange 3.8.1
[  ] rabbitmq_event_exchange           3.8.1
[  ] rabbitmq_federation               3.8.1
[  ] rabbitmq_federation_management    3.8.1
[  ] rabbitmq_jms_topic_exchange       3.8.1
[E*] rabbitmq_management               3.8.1
[e*] rabbitmq_management_agent         3.8.1
[  ] rabbitmq_mqtt                     3.8.1
[  ] rabbitmq_peer_discovery_aws       3.8.1
[e*] rabbitmq_peer_discovery_common    3.8.1
[  ] rabbitmq_peer_discovery_consul    3.8.1
[  ] rabbitmq_peer_discovery_etcd      3.8.1
[E*] rabbitmq_peer_discovery_k8s       3.8.1
[  ] rabbitmq_prometheus               3.8.1
[  ] rabbitmq_random_exchange          3.8.1
[  ] rabbitmq_recent_history_exchange  3.8.1
[  ] rabbitmq_sharding                 3.8.1
[  ] rabbitmq_shovel                   3.8.1
[  ] rabbitmq_shovel_management        3.8.1
[  ] rabbitmq_stomp                    3.8.1
[  ] rabbitmq_top                      3.8.1
[  ] rabbitmq_tracing                  3.8.1
[  ] rabbitmq_trust_store              3.8.1
[e*] rabbitmq_web_dispatch             3.8.1
[  ] rabbitmq_web_mqtt                 3.8.1
[  ] rabbitmq_web_mqtt_examples        3.8.1
[  ] rabbitmq_web_stomp                3.8.1
[  ] rabbitmq_web_stomp_examples       3.8.1