[Questions] use erl_inetrc rabbitmqctl cluster_status not work

[dormanze]

Community Support Policy

• I have read RabbitMQ's Community Support Policy
• I run RabbitMQ 4.x, the only series currently covered by community support
• I promise to provide all relevant information (versions, logs from all nodes, rabbitmq-diagnostics output, detailed reproduction steps)

RabbitMQ version used

4.1.1

Erlang version used

27.3.x

Operating system (distribution) used

linux

How is RabbitMQ deployed?

Community Docker image

rabbitmq-diagnostics status output

See https://www.rabbitmq.com/docs/cli to learn how to use rabbitmq-diagnostics

# PASTE OUTPUT HERE, BETWEEN BACKTICKS

Logs from node 1 (with sensitive values edited out)

See https://www.rabbitmq.com/docs/logging to learn how to collect logs

# PASTE LOG HERE, BETWEEN BACKTICKS

Logs from node 2 (if applicable, with sensitive values edited out)

See https://www.rabbitmq.com/docs/logging to learn how to collect logs

# PASTE LOG HERE, BETWEEN BACKTICKS

Logs from node 3 (if applicable, with sensitive values edited out)

See https://www.rabbitmq.com/docs/logging to learn how to collect logs

# PASTE LOG HERE, BETWEEN BACKTICKS

rabbitmq.conf

See https://www.rabbitmq.com/docs/configure#config-location to learn how to find rabbitmq.conf file location

listeners.tcp = none
listeners.ssl.default = 33.86.12.251:5673
credential_validator.validation_backend = rabbit_credential_validator_password_regexp
credential_validator.regexp = ^(?=.*\d)(?=.*[A-Z])(?=.*[a-z])(?=.*[~@%^_=+\[{}\]:,.\/?])[\da-zA-Z~@%^_=+\[{}\]:,.\/?]{16,32}$|guest
log.file.level = info
log.file.rotation.size = 524288000
log.file.rotation.count = 0
vm_memory_high_watermark.absolute = 1638MiB
password_hashing_module = rabbit_password_hashing_sha512
cluster_partition_handling = autoheal
cluster_formation.discovery_retry_limit = 20
cluster_formation.discovery_retry_interval = 1000
mnesia_table_loading_retry_timeout = 30000
mnesia_table_loading_retry_limit = 5
cluster_formation.node_cleanup.only_log_warning = true
management.login_session_timeout = 30
cluster_name = rabbitmq_cluster

cluster_formation.peer_discovery_backend = rabbit_peer_discovery_classic_config

cluster_formation.classic_config.nodes.1 = rabbit@rabbitmqservice-0

cluster_formation.classic_config.nodes.2 = rabbit@rabbitmqservice-1

cluster_formation.classic_config.nodes.3 = rabbit@rabbitmqservice-2

Steps to deploy RabbitMQ cluster

config erl_inetrc and start rabbitmq

Steps to reproduce the behavior in question

erl_inetrc file info:

{file, hosts, "/usr/local/rabbitmq_server-4.1.1/etc/rabbitmq/rabbitmq_hosts"}.
{file, resolv, "/etc/resolv.conf"}.
{lookup, [file, dns]}.

/usr/local/rabbitmq_server-4.1.1/etc/rabbitmq/rabbitmq_hosts is my hosts file:

33.86.11.35 rabbitmqservice-0
33.86.10.135 rabbitmqservice-1
33.86.12.251 rabbitmqservice-2

my rabbitmq-env.conf:

ERL_EPMD_PORT=4368
ERL_EPMD_ADDRESS=33.86.12.251
RABBITMQ_DIST_ADDR={33,86,12,251}
RABBITMQ_SERVER_ADDITIONAL_ERL_ARGS="-kernel inet_dist_use_interface ${RABBITMQ_DIST_ADDR} inetrc \"/usr/local/rabbitmq_server-4.1.1/etc/rabbitmq/erl_inetrc\" +S 2:2"
RABBITMQ_DIST_PORT=25674
NODENAME=rabbit@rabbitmqservice-2

advanced.config

See https://www.rabbitmq.com/docs/configure#config-location to learn how to find advanced.config file location

# PASTE advanced.config HERE, BETWEEN BACKTICKS

Application code

# PASTE CODE HERE, BETWEEN BACKTICKS

Kubernetes deployment file

# Relevant parts of K8S deployment that demonstrate how RabbitMQ is deployed
# PASTE YAML HERE, BETWEEN BACKTICKS

What problem are you trying to solve?

I find rabbitmq process is start success, but rabbitmqctl cluster_status cannot work.
I set my nodes info to /etc/hosts, rabbitmqctl cluster_status work ok.

[mkuratczyk]

Do you set RABBITMQ_CTL_ERL_ARGS? I think you need to - otherwise the CLI is unaware of the inetrc configuration

[dormanze]

Thank you for your suggestion. After adding the variable, I received an error message about the encoding format. I'm not sure where I went wrong in the configuration.
my config:

ERL_EPMD_PORT=4368
ERL_EPMD_ADDRESS=33.86.12.251
RABBITMQ_DIST_ADDR={33,86,12,251}
RABBITMQ_SERVER_ADDITIONAL_ERL_ARGS="-kernel inet_dist_use_interface ${RABBITMQ_DIST_ADDR} inetrc '/usr/local/rabbitmq_server-4.1.1/etc/rabbitmq/erl_inetrc' +S 2:2"
RABBITMQ_CTL_ERL_ARGS="-kernel inetrc '/usr/local/rabbitmq_server-4.1.1/etc/rabbitmq/erl_inetrc'"
RABBITMQ_DIST_PORT=25674
NODENAME=rabbit@rabbitmqservice-2

error message:

(no logger present) unexpected logger message: {log,error,"Error in process ~p with exit value:~n~p~n",[<0.45.0>,{undef,[{unicode,characters_to_list,[[[[61,"ERROR REPORT",61,61,61,61,32,"10",45,"Jul",45,"2025",58,58,"18",58,"21",58,"33",46,"961928",32,[],61,61,61],"\n"],[97,112,112,108,105,99,97,116,105,111,110,95,99,111,110,116,114,111,108,108,101,114,58,32,["syntax error before: ","'/'"],58,32,"/usr/local/rabbitmq_server-4.1.1/etc/rabbitmq/erl_inetrc",10],["\n"]]],[]},{logger_simple_h,'-do_log/2-fun-0-',1,[{file,"logger_simple_h.erl"},{line,159}]}]}],#{error_logger=>#{emulator=>true,tag=>error},pid=><0.45.0>,time=>1752142894015667,gl=><0.0.0>}}
Could not start kernel pid (application_controller) ("{bad_environment_value,\"/usr/local/rabbitmq_server-4.0.6/etc/rabbitmq/erl_inetrc\"}")

Crash dump is being written to: erl_crash.dump...done

[michaelklishin]

There is no shortage of examples in the relevant doc guide, even for Windows.

'value' and "value" in Erlang are not the same thing. The former is an atom (a data type) and the latter is a string.

RABBITMQ_CTL_ERL_ARGS="-kernel inetrc '/usr/local/rabbitmq_server-4.1.1/etc/rabbitmq/erl_inetrc'"

should probably be

RABBITMQ_CTL_ERL_ARGS='-kernel inetrc /usr/local/rabbitmq_server-4.1.1/etc/rabbitmq/erl_inetrc'

or

RABBITMQ_CTL_ERL_ARGS='-kernel inetrc "/usr/local/rabbitmq_server-4.1.1/etc/rabbitmq/erl_inetrc"'

[dormanze]

ok, thank you. i find one way, set a global parameter, like export ERL_INETRC=/usr/local/rabbitmq_server-4.1.1/etc/rabbitmq/erl_inetrc for server and cli.