Como solucionar o erro "Conexão recusada" no CCO ao tentar se conectar ao Rabbit

Introduction

Este documento descreve como resolver o erro "Conexão recusada" no CiscoCloud Orchestrator (CCO) quando está tentando se conectar ao Rabbit 

Prerequisites

Requirements

• As informações neste documento são baseadas no CloudCenter 4.x
• CiscoCloud Orchestrator (CCO)
• Servidor de coelho (AMQP)
• acesso raiz ao CCO e AMQP

The information in this document was created from the devices in a specific lab environment. All of the devices used in this document started with a cleared (default) configuration. If your network is live, make sure that you understand the potential impact of any command.

Problema

Em novas implantações ou após uma alteração no nome do host do servidor Rabbit, o CCO recebe um erro no momento para estabelecer o handshake com Rabbit com o seguinte ERRO

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

Solução

Etapa 1. Faça login no servidor Rabbit

Etapa 2. listar as conexões no servidor Rabbit 

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

Etapa 3. Localize o arquivo RABBITINSTALLED

[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

Etapa 4. Remova o arquivo.

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

Etapa 5. Execute o arquivo rabbit_config.sh

[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"

Etapa 6. Faça login no CCO como raiz

Passo 7. Reiniciar serviço CCO

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

Etapa 8. Verifique se o CCO está em execução

[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 ~]#

Etapa 9. Faça login em coelho como raiz

Etapa 10. Listar o número de conexões 

[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

Agora você pode ver a conexão do CCO, cliente_trabalhador e cliente.