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针对 rabbitmq 进行配置：
创建步骤如下。
1. 启动容器
docker run -d --hostname my-rabbit --name rabbitmq -p 8080:15672 \
rabbitmq:3.7-management-alpine
2. 进入容器
docker exec -it rabbitmq /bin/sh
3. 启用插件
umask 0022; rabbitmq-plugins enable --offline \
rabbitmq_auth_backend_http rabbitmq_auth_backend_cache rabbitmq_web_stomp
特别注意这里的
umask 0022;，只有这样配置，镜像才能读取插件配置，才能启动成功。
输出内容：
The following plugins have been configured:
rabbitmq_auth_backend_cache
rabbitmq_auth_backend_http
rabbitmq_management
rabbitmq_management_agent
rabbitmq_stomp
rabbitmq_web_dispatch
rabbitmq_web_stomp
Applying plugin configuration to rabbit@my-rabbit...
The following plugins have been enabled:
rabbitmq_auth_backend_cache
rabbitmq_auth_backend_http
rabbitmq_stomp
rabbitmq_web_stomp
set 7 plugins.
Offline change; changes will take effect at broker restart.
4. 配置 /etc/rabbitmq/rabbitmq.conf
在配置中追加：
auth_backends.1 = cache
# auth_backends.1 = http
auth_backends.2 = internal
auth_cache.cached_backend = http
auth_http.http_method = post
auth_http.user_path = http://rabbitmq-auth:8080/auth/user
auth_http.vhost_path = http://rabbitmq-auth:8080/auth/vhost
auth_http.resource_path = http://rabbitmq-auth:8080/auth/resource
auth_http.topic_path = http://rabbitmq-auth:8080/auth/topic
auth_cache.cache_ttl = 60000
特别注意，后续需要提供 rabbitmq-auth 服务进行认证。
5. 退出容器提交
退出容器后，使用容器当前状态提交为新的镜像，参考命令如下：
docker commit rabbitmq 镜像名:版本
后续使用镜像时，就可以直接使用插件提供的功能了。