NVP vProxy: "rabbitmq" down after disabling IPV6 for vproxy

Summary: rabbitmq service is down after disabling IPV6 and due to this the connection is refused on port 5672

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Symptoms

  • IPv6 has been disabled on the vProxy appliance.
  • The vProxy's /data01/runtime/logs/vrapid/vrapid-engine.log log contains the following:
2021-02-03T08:47:55Z ERROR: Engines IPC: Connection 1: Cannot connect to message bus 'amqp://guest:guest@localhost:5672/': dial tcp 127.0.0.1:5672: connect: connection refused
2021-02-03T08:48:10Z TRACE: Engines IPC: Connection 1: Connecting to the message bus...
2021-02-03T08:48:10Z ERROR: Engines IPC: Connection 1: Cannot connect to message bus 'amqp://guest:guest@localhost:5672/': dial tcp 127.0.0.1:5672: connect: connection refused
2021-02-03T08:48:25Z TRACE: Engines IPC: Connection 1: Connecting to the message bus...
2021-02-03T08:48:25Z ERROR: Engines IPC: Connection 1: Cannot connect to message bus 'amqp://guest:guest@localhost:5672/': dial tcp 127.0.0.1:5672: connect: connection refused

 

Cause

rabbitmq fails to start up when ipv6 is disabled and due to this vrapid is down

 

Resolution

Workaround:

  1. Re enable IPV6 ensure vrapid is up, connect to the vProxy as admin and su to root:

    sudo su -

  2. Create a copy of rabbitmq.conf:

    cp -P /etc/rabbitmq/rabbitmq.config /etc/rabbitmq/rabbitmq.config.orig

  3. Check the current listners:

    rabbitmq-diagnostics listeners

    Example:

    Interface: 127.0.0.1, port: 5672, protocol: amqp, purpose: AMQP 0-9-1 and AMQP 1.0
Interface: [::1], port: 5672, protocol: amqp, purpose: AMQP 0-9-1 and AMQP 1.0

  4. Modify the rabbitmq.config file to remove ipv6 listner:

    vi /etc/rabbitmq/rabbitmq.config

    From :

    ######################################

[
{rabbit,
[{tcp_listeners,
[{"127.0.0.1", 5672}, {"::1", 5672}]}]
}
].

######################################
######################################

    To

    ######################################



[
{rabbit,
[{tcp_listeners,
[{"127.0.0.1", 5672}]}]
}
].


######################################
######################################

  5. Reboot vProxy:

    reboot

  6. Confirm rabbit and vrapid services are up and running:

    systemctl status rabbitmq-server.service
systemctl status vrapid.service

  7. Check connectivity on port 9090 using the curl command:

    curl -v localhost:9090

 

Article Properties
Article Number: 000182732
Article Type: Solution
Last Modified: 11 Nov 2024
Version:  5
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