epmd connection error

[karsapeng]

my docker-compose config is

version: '2'
services:
  rabbitmq:
    restart: always
    image: docker.friddle.me/rabbitmq:3.13-management
    container_name: rabbitmq_cluster
    environment:
      - RABBITMQ_ERLANG_COOKIE=rabbitmq
      - [email protected]
      - LANG=en_US.UTF-8
      - HOSTNAME=mq-01
      - RABBITMQ_USE_LONGNAME=true
      - RABBITMQ_DEFAULT_USER=admin
      - RABBITMQ_DEFAULT_PASS=fZW7A5
    ulimits:
      memlock:
        soft: -1
        hard: -1
      nofile:
        soft: 1000000
        hard: 1000000
    extra_hosts:
      mq-01: 192.168.10.111
      mq-02: 192.168.10.148
    network_mode: host
    volumes:
      - ./logs:/var/log/rabbitmq/:rw
      - ./data:/var/lib/rabbitmq/mnesia/:rw

but when i start it ,will return error with

Error Log

=INFO REPORT==== 24-Aug-2024::12:45:38.240399 ===
    alarm_handler: {set,{system_memory_high_watermark,[]}}

2024-08-24 12:45:42.891681+00:00 [error] <0.156.0> 
2024-08-24 12:45:42.891681+00:00 [error] <0.156.0> BOOT FAILED
2024-08-24 12:45:42.891681+00:00 [error] <0.156.0> ===========
2024-08-24 12:45:42.891681+00:00 [error] <0.156.0> ERROR: epmd error for host mq-01.localdomain.com: address (cannot connect to host/port)
2024-08-24 12:45:42.891681+00:00 [error] <0.156.0> 
BOOT FAILED
===========
ERROR: epmd error for host mq-01.localdomain.com: address (cannot connect to host/port)

2024-08-24 12:45:43.905365+00:00 [error] <0.156.0>     supervisor: {local,rabbit_prelaunch_sup}
2024-08-24 12:45:43.905365+00:00 [error] <0.156.0>     errorContext: start_error
2024-08-24 12:45:43.905365+00:00 [error] <0.156.0>     reason: {epmd_error,"mq-01.localdomain.com",address}
2024-08-24 12:45:43.905365+00:00 [error] <0.156.0>     offender: [{pid,undefined},
2024-08-24 12:45:43.905365+00:00 [error] <0.156.0>                {id,prelaunch},
2024-08-24 12:45:43.905365+00:00 [error] <0.156.0>                {mfargs,{rabbit_prelaunch,run_prelaunch_first_phase,[]}},
2024-08-24 12:45:43.905365+00:00 [error] <0.156.0>                {restart_type,transient},
2024-08-24 12:45:43.905365+00:00 [error] <0.156.0>                {significant,false},
2024-08-24 12:45:43.905365+00:00 [error] <0.156.0>                {shutdown,5000},
2024-08-24 12:45:43.905365+00:00 [error] <0.156.0>                {child_type,worker}]
2024-08-24 12:45:43.905365+00:00 [error] <0.156.0> 
2024-08-24 12:45:43.906027+00:00 [error] <0.154.0>   crasher:
2024-08-24 12:45:43.906027+00:00 [error] <0.154.0>     initial call: application_master:init/4
2024-08-24 12:45:43.906027+00:00 [error] <0.154.0>     pid: <0.154.0>
2024-08-24 12:45:43.906027+00:00 [error] <0.154.0>     registered_name: []
2024-08-24 12:45:43.906027+00:00 [error] <0.154.0>     exception exit: {{shutdown,
2024-08-24 12:45:43.906027+00:00 [error] <0.154.0>                          {failed_to_start_child,prelaunch,
2024-08-24 12:45:43.906027+00:00 [error] <0.154.0>                              {epmd_error,"mq-01.localdomain.com",address}}},
2024-08-24 12:45:43.906027+00:00 [error] <0.154.0>                      {rabbit_prelaunch_app,start,[normal,[]]}}
2024-08-24 12:45:43.906027+00:00 [error] <0.154.0>       in function  application_master:init/4 (application_master.erl, line 142)
2024-08-24 12:45:43.906027+00:00 [error] <0.154.0>     ancestors: [<0.153.0>]
2024-08-24 12:45:43.906027+00:00 [error] <0.154.0>     message_queue_len: 1
2024-08-24 12:45:43.906027+00:00 [error] <0.154.0>     messages: [{'EXIT',<0.155.0>,normal}]
2024-08-24 12:45:43.906027+00:00 [error] <0.154.0>     links: [<0.153.0>,<0.44.0>]
2024-08-24 12:45:43.906027+00:00 [error] <0.154.0>     dictionary: []
2024-08-24 12:45:43.906027+00:00 [error] <0.154.0>     trap_exit: true
2024-08-24 12:45:43.906027+00:00 [error] <0.154.0>     status: running
2024-08-24 12:45:43.906027+00:00 [error] <0.154.0>     heap_size: 376
2024-08-24 12:45:43.906027+00:00 [error] <0.154.0>     stack_size: 28
2024-08-24 12:45:43.906027+00:00 [error] <0.154.0>     reductions: 167
2024-08-24 12:45:43.906027+00:00 [error] <0.154.0>   neighbours:
2024-08-24 12:45:43.906027+00:00 [error] <0.154.0> 
2024-08-24 12:45:43.915959+00:00 [notice] <0.44.0> Application rabbitmq_prelaunch exited with reason: {{shutdown,{failed_to_start_child,prelaunch,{epmd_error,"mq-01.localdomain.com",address}}},{rabbit_prelaunch_app,start,[normal,[]]}}
Runtime terminating during boot (terminating)

Crash dump is being written to: erl_crash.dump...[os_mon] cpu supervisor port (cpu_sup): Erlang has closed
[os_mon] memory supervisor port (memsup): Erlang has closed

my system is

Linux localhost.localdomain 4.19.90-52.15.v2207.ky10.aarch64 rabbitmq/cluster-operator#1 SMP Thu Nov 24 15:59:41 CST 2022 aarch64 aarch64 aarch64 GNU/Linux
NAME="Kylin Linux Advanced Server"
VERSION="V10 (Lance)"
ID="kylin"
VERSION_ID="V10"
PRETTY_NAME="Kylin Linux Advanced Server V10 (Lance)"
ANSI_COLOR="0;31"

what should i do ?

[lukebakken]

Basically, the problem is that mq-01.localdomain.com does not resolve via DNS in your environment.

My guess is that extra_hosts should be set like this:

    extra_hosts:
      mq-01.localdomain.com: 192.168.10.111
      mq-02.localdomain.com: 192.168.10.148

You probably also need to add an alias for the mq-01 host in the same way I do in my example project:

https://github.com/lukebakken/docker-rabbitmq-cluster/blob/main/docker-compose.yml#L10-L13

I don't use host networking mode so you're on your own, but you should be able to get ideas from my project. Good luck.

[michaelklishin]

@karsapeng in repositories that have GitHub Discussions enabled, consider using them for questions instead of filing issues. Issues for question is just outright rude in 2024.

[karsapeng]

version: '3'
networks:
rabbitnet:
driver: bridge
services:
rabbitmq:
restart: always
image: docker.friddle.me/rabbitmq:3.13-management
container_name: rabbitmq_cluster
environment:
- RABBITMQ_ERLANG_COOKIE=laiyesaasrabbitmq
- NODENAME=[email protected]
- LANG=en_US.UTF-8
- HOSTNAME=mq-01
- RABBITMQ_USE_LONGNAME=true
- RABBITMQ_DEFAULT_USER=admin
- RABBITMQ_DEFAULT_PASS=fZW7A5V3jq_W
ulimits:
memlock:
soft: -1
hard: -1
nofile:
soft: 1000000
hard: 1000000
extra_hosts:
mq-01.localdomain.com: 192.168.10.111
networks:
rabbitnet:
aliases:
- mq-01.localdomain.com
volumes:
- ./logs:/var/log/rabbitmq/:rw
- ./data:/var/lib/rabbitmq/mnesia/:rw
- ./hosts:/etc/hosts:rw
@lukebakken hello。I configured it the way you did. There is still a problem. still return epmd error for host mq-01.localdomain.com: address (cannot connect to host/port)

[karsapeng]

i used containerd @lukebakken

[michaelklishin]

@karsapeng stop repeatedly filing issues for questions or you will be banned. Your question is not a bug in RabbitMQ by any stretch of the imagination. It's hostname resolution problem.

Our community support policy explicitly excludes network troubleshooting for non-paying and non-contributing users. @lukebakken is helping you out of his own good will.