当尝试与Rabbit连接时，如何在CCO中解决错误“连接被拒绝”

简介

本文档介绍如何解决CiscoCloud Orchestrator(CCO)在尝试连接到Rabbit时出现的错误“连接被拒绝” 

先决条件

要求

• 本文档中的信息基于CloudCenter 4.x
• 思科云协调器(CCO)
• 兔服务器(AMQP)
• 对CCO和AMQP的根访问

本文档中的信息都是基于特定实验室环境中的设备编写的。本文档中使用的所有设备最初均采用原始（默认）配置。如果您使用的是真实网络，请确保您已经了解所有命令的潜在影响。

问题

在新部署中或Rabbit服务器主机名更改后，CCO此时会收到错误，与Rabbit建立握手，并出现以下错误

2018-04-17 23:58:52,180 ERROR listener.SimpleMessageListenerContainer [rabbitListenerContainer-1]  - Failed to check/redeclare auto-delete queue(s).
org.springframework.amqp.AmqpConnectException: java.net.ConnectException: Connection refused (Connection refused)
        at org.springframework.amqp.rabbit.support.RabbitExceptionTranslator.convertRabbitAccessException(RabbitExceptionTranslator.java:62) ~[spring-rabbit-1.7.4.RELEASE.jar!/:?]
        at org.springframework.amqp.rabbit.connection.AbstractConnectionFactory.createBareConnection(AbstractConnectionFactory.java:368) ~[spring-rabbit-1.7.4.RELEASE.jar!/:?]
        at org.springframework.amqp.rabbit.connection.CachingConnectionFactory.createConnection(CachingConnectionFactory.java:573) ~[spring-rabbit-1.7.4.RELEASE.jar!/:?]
        at org.springframework.amqp.rabbit.core.RabbitTemplate.doExecute(RabbitTemplate.java:1430) ~[spring-rabbit-1.7.4.RELEASE.jar!/:?]
        at org.springframework.amqp.rabbit.core.RabbitTemplate.execute(RabbitTemplate.java:1411) ~[spring-rabbit-1.7.4.RELEASE.jar!/:?]
        at org.springframework.amqp.rabbit.core.RabbitTemplate.execute(RabbitTemplate.java:1387) ~[spring-rabbit-1.7.4.RELEASE.jar!/:?]
        at org.springframework.amqp.rabbit.core.RabbitAdmin.getQueueProperties(RabbitAdmin.java:336) ~[spring-rabbit-1.7.4.RELEASE.jar!/:?]
        at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.redeclareElementsIfNecessary(SimpleMessageListenerContainer.java:1171) [spring-rabbit-1.7.4.RELEASE.jar!/:?]
        at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer$AsyncMessageProcessingConsumer.run(SimpleMessageListenerContainer.java:1422) [spring-rabbit-1.7.4.RELEASE.jar!/:?]
        at java.lang.Thread.run(Thread.java:748) [?:1.8.0_162]
Caused by: java.net.ConnectException: Connection refused (Connection refused)
        at java.net.PlainSocketImpl.socketConnect(Native Method) ~[?:1.8.0_162]
        at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350) ~[?:1.8.0_162]
        at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206) ~[?:1.8.0_162]
        at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188) ~[?:1.8.0_162]
        at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) ~[?:1.8.0_162]
        at java.net.Socket.connect(Socket.java:589) ~[?:1.8.0_162]
        at sun.security.ssl.SSLSocketImpl.connect(SSLSocketImpl.java:673) ~[?:1.8.0_162]
        at com.rabbitmq.client.impl.SocketFrameHandlerFactory.create(SocketFrameHandlerFactory.java:50) ~[amqp-client-4.0.3.jar!/:4.0.3]
        at com.rabbitmq.client.ConnectionFactory.newConnection(ConnectionFactory.java:907) ~[amqp-client-4.0.3.jar!/:4.0.3]
        at com.rabbitmq.client.ConnectionFactory.newConnection(ConnectionFactory.java:859) ~[amqp-client-4.0.3.jar!/:4.0.3]
        at com.rabbitmq.client.ConnectionFactory.newConnection(ConnectionFactory.java:799) ~[amqp-client-4.0.3.jar!/:4.0.3]
        at org.springframework.amqp.rabbit.connection.AbstractConnectionFactory.createBareConnection(AbstractConnectionFactory.java:352) ~[spring-rabbit-1.7.4.RELEASE.jar!/:?]
        ... 8 more

解决方案

步骤1.登录Rabbit服务器

步骤2.列出Rabbit服务器中的连接 

[root@rabbit-490 ~]# rabbitmqctl list_connections -p /cliqr
Listing connections

步骤3.找到RABBITINSTALLED文件

[root@rabbit-490 ~]# ls -lrt  /usr/local/osmosix/etc/.RABBITINSTALLED
-rw-r--r-- 1 root root 0 Apr 17 23:40 /usr/local/osmosix/etc/.RABBITINSTALLED

步骤4.删除文件。

[root@rabbit-490 ~]# rm -rf  /usr/local/osmosix/etc/.RABBITINSTALLED
[root@rabbit-490 ~]# ls -lrt  /usr/local/osmosix/etc/.RABBITINSTALLED
[root@rabbit-490 ~]#

步骤5.运行rabbit_config.sh文件

[root@rabbit-490 ~]# cd /usr/local/cliqr/bin/
root@rabbit-490 bin]# ls -lrt
total 80
-rwxr-xr-x 1 cliqruser cliqruser 23235 Apr  9 16:12 wizard_util.sh
-rwxr-xr-x 1 cliqruser cliqruser 12133 Apr  9 16:12 props_migration_481_to_482.sh
-rw-r--r-- 1 cliqruser cliqruser   236 Apr  9 16:12 props_481_to_482_rabbit.csv
-rwxr-xr-x 1 cliqruser cliqruser  4004 Apr  9 16:12 gua_config_wizard.sh
-rwxr-xr-x 1 cliqruser cliqruser  3553 Apr  9 16:12 gua_config_cli.sh
-rwxr-xr-x 1 cliqruser cliqruser  8966 Apr 10 02:40 rabbit_config_cli.sh
-rwxr-xr-x 1 cliqruser cliqruser  9394 Apr 10 02:40 rabbit_config_wizard.sh
-rwxr-xr-x 1 cliqruser cliqruser  1290 Apr 10 02:41 rabbit_config.sh
-rwxr-xr-x 1 cliqruser cliqruser   279 Apr 10 02:41 startup_services.sh
[root@rabbit-490 bin]# ./rabbit_config.sh
Adding vhost /cliqr
Creating vhost "/cliqr"
Adding user cliqr
Creating user "cliqr"
Setting permissions for user "cliqr" in vhost "/cliqr"
Setting cliqr as admin
Setting tags for user "cliqr" to [administrator]
Enable management plugin
Plugin configuration unchanged.

Applying plugin configuration to rabbit@rabbit-490... nothing to do.
Adding cliqr_worker
Creating user "cliqr_worker"
Setting permissions for user "cliqr_worker" in vhost "/cliqr"

步骤6.以根用户身份登录CCO

步骤7.重新启动CCO服务

[root@cco-490 ~]# systemctl start cco
[root@cco-490 ~]#

步骤8.检验CCO是否正在运行

[root@cco-490 ~]# systemctl status cco
● cco.service - Cloud Center Orchestrator
   Loaded: loaded (/etc/systemd/system/cco.service; enabled; vendor preset: disabled)
   Active: active (exited) since Wed 2018-04-18 22:02:09 UTC; 5min ago
  Process: 3329 ExecStart=/bin/true (code=exited, status=0/SUCCESS)
 Main PID: 3329 (code=exited, status=0/SUCCESS)
    Tasks: 0
   Memory: 0B
   CGroup: /system.slice/cco.service

Apr 18 22:02:09 cco-490 systemd[1]: Starting Cloud Center Orchestrator...
Apr 18 22:02:09 cco-490 systemd[1]: Started Cloud Center Orchestrator.
[root@cco-490 ~]#

步骤9.以根用户身份登录兔

步骤10.列出连接数 

[root@rabbit-490 bin]# rabbitmqctl list_connections -p /cliqr
Listing connections
cliqr_worker	10.31.127.24	50556	running
cliqr	10.31.127.24	50568	running

现在，您可以看到从CCO、cliqr_worker和cliqr进行连接。