Inspect RabbitMQ settings using command-line.
Use Erlang to display RabbitMQ version.
$ sudo rabbitmqctl eval "rabbit_misc:version()." "3.8.2"
Use Erlang to display OTP release number.
$ sudo rabbitmqctl eval "rabbit_misc:otp_release()." "22.2"
Use Erlang to display RabbitMQ node name.
$ sudo rabbitmqctl eval 'node().' rabbit@rabbit
Use Erlang to display RabbitMQ configuration parameters.
$ sudo rabbitmqctl eval 'application:get_all_env(rabbit).'
[{lager_upgrade_file,"/var/log/rabbitmq/rabbit@rabbit_upgrade.log"},
{quorum_cluster_size,5},
{max_message_size,134217728},
{autocluster,[{peer_discovery_backend,rabbit_peer_discovery_classic_config}]},
{disk_free_limit,50000000},
{collect_statistics_interval,5000},
{quorum_commands_soft_limit,256},
{ssl_allow_poodle_attack,false},
{channel_operation_timeout,15000},
{backing_queue_module,rabbit_priority_queue},
{disk_monitor_failure_retries,10},
{fhc_read_buffering,false},
{cluster_nodes,{[],disc}},
{default_consumer_prefetch,{false,0}},
{loopback_users,[<<"guest">>]},
{msg_store_file_size_limit,16777216},
{enabled_plugins_file,"/etc/rabbitmq/enabled_plugins"},
{reverse_dns_lookups,false},
{mnesia_table_loading_retry_limit,10},
{plugins_expand_dir,"/var/lib/rabbitmq/mnesia/rabbit@rabbit-plugins-expand"},
{server_properties,[]},
{ssl_cert_login_from,distinguished_name},
{background_gc_target_interval,60000},
{config_entry_decoder,[{passphrase,undefined}]},
{handshake_timeout,10000},
{default_vhost,<<"/">>},
{lager_extra_sinks,[rabbit_log_lager_event,t_log_connection_lager_event,
rabbit_log_connection_lager_event,
rabbit_log_ldap_lager_event,
rabbit_log_mirroring_lager_event,
rabbit_log_queue_lager_event,rabbit_log_ra_lager_event,
rabbit_log_federation_lager_event,
rabbit_log_shovel_lager_event,
rabbit_log_upgrade_lager_event]},
{vm_memory_high_watermark,0.4},
{lager_default_file,"/var/log/rabbitmq/rabbit@rabbit.log"},
{queue_explicit_gc_run_operation_threshold,1000},
{vm_memory_calculation_strategy,rss},
{mirroring_sync_batch_size,4096},
{hipe_modules,[rabbit_reader,rabbit_channel,gen_server2,rabbit_exchange,
rabbit_command_assembler,rabbit_framing_amqp_0_9_1,
rabbit_basic,rabbit_event,lists,queue,priority_queue,
rabbit_router,rabbit_trace,rabbit_misc,rabbit_binary_parser,
rabbit_exchange_type_direct,rabbit_guid,rabbit_net,
rabbit_amqqueue_process,rabbit_variable_queue,
rabbit_binary_generator,rabbit_writer,delegate,gb_sets,lqueue,
sets,orddict,rabbit_amqqueue,rabbit_limiter,gb_trees,
rabbit_queue_index,rabbit_exchange_decorator,gen,dict,ordsets,
file_handle_cache,rabbit_msg_store,array,
rabbit_msg_store_ets_index,rabbit_msg_file,
rabbit_exchange_type_fanout,rabbit_exchange_type_topic,mnesia,
mnesia_lib,rpc,mnesia_tm,qlc,sofs,proplists,credit_flow,pmon,
ssl_connection,tls_connection,ssl_record,tls_record,gen_fsm,
ssl]},
{channel_tick_interval,60000},
{ssl_handshake_timeout,5000},
{auth_mechanisms,['PLAIN','AMQPLAIN']},
{hipe_compile,false},
{channel_max,2047},
{vhost_restart_strategy,continue},
{memory_monitor_interval,2500},
{background_gc_enabled,false},
{queue_index_max_journal_entries,32768},
{connection_max,infinity},
{credit_flow_default_credit,{400,200}},
{auth_backends,[rabbit_auth_backend_internal]},
{num_ssl_acceptors,10},
{password_hashing_module,rabbit_password_hashing_sha256},
{lager_log_root,"/var/log/rabbitmq"},
{msg_store_io_batch_size,4096},
{delegate_count,16},
{msg_store_index_module,rabbit_msg_store_ets_index},
{log,[{file,[{file,"/var/log/rabbitmq/rabbit@rabbit.log"}]},
{categories,[{upgrade,[{file,"/var/log/rabbitmq/rabbit@rabbit_upgrade.log"}]}]}]},
{default_user,<<"guest">>},
{frame_max,131072},
{queue_index_embed_msgs_below,4096},
{cluster_keepalive_interval,10000},
{mnesia_table_loading_retry_timeout,30000},
{ssl_options,[]},
{ssl_apps,[asn1,crypto,public_key,ssl]},
{lazy_queue_explicit_gc_run_operation_threshold,1000},
{feature_flags_file,"/var/lib/rabbitmq/mnesia/rabbit@rabbit-feature_flags"},
{trace_vhosts,[]},
{default_pass,<<"guest">>},
{num_tcp_acceptors,10},
{disk_monitor_failure_retry_interval,120000},
{cluster_partition_handling,ignore},
{ssl_listeners,[]},
{default_permissions,[<<".*">>,<<".*">>,<<".*">>]},
{mirroring_flow_control,true},
{msg_store_credit_disc_bound,{4000,800}},
{fhc_write_buffering,true},
{halt_on_upgrade_failure,true},
{tcp_listen_options,[{backlog,128},
{nodelay,true},
{linger,{true,0}},
{exit_on_close,false}]},
{vm_memory_high_watermark_paging_ratio,0.5},
{heartbeat,60},
{plugins_dir,"/usr/lib/rabbitmq/plugins:/usr/lib/rabbitmq/lib/rabbitmq_server-3.8.2/plugins"},
{proxy_protocol,false},
{default_user_tags,[administrator]},
{tcp_listeners,[5672]},
{collect_statistics,fine}]
Use Erlang to display RabbitMQ configuration parameters and use JSON output format.
$ sudo rabbitmqctl eval 'application:get_all_env(rabbit).' --formatter json | jq .
{
"lager_upgrade_file": [
47,
118,
97,
114,
47,
108,
111,
103,
47,
114,
97,
98,
98,
105,
116,
109,
113,
47,
114,
97,
98,
98,
105,
116,
64,
114,
97,
98,
98,
105,
116,
95,
117,
112,
103,
114,
97,
100,
101,
46,
108,
111,
103
],
"quorum_cluster_size": 5,
"max_message_size": 134217728,
"autocluster": {
"peer_discovery_backend": "rabbit_peer_discovery_classic_config"
},
"disk_free_limit": 50000000,
"collect_statistics_interval": 5000,
"quorum_commands_soft_limit": 256,
"ssl_allow_poodle_attack": false,
"channel_operation_timeout": 15000,
"backing_queue_module": "rabbit_priority_queue",
"disk_monitor_failure_retries": 10,
"fhc_read_buffering": false,
"cluster_nodes": [
[],
"disc"
],
"default_consumer_prefetch": [
false,
0
],
"loopback_users": [
"guest"
],
"msg_store_file_size_limit": 16777216,
"enabled_plugins_file": [
47,
101,
116,
99,
47,
114,
97,
98,
98,
105,
116,
109,
113,
47,
101,
110,
97,
98,
108,
101,
100,
95,
112,
108,
117,
103,
105,
110,
115
],
"reverse_dns_lookups": false,
"mnesia_table_loading_retry_limit": 10,
"plugins_expand_dir": [
47,
118,
97,
114,
47,
108,
105,
98,
47,
114,
97,
98,
98,
105,
116,
109,
113,
47,
109,
110,
101,
115,
105,
97,
47,
114,
97,
98,
98,
105,
116,
64,
114,
97,
98,
98,
105,
116,
45,
112,
108,
117,
103,
105,
110,
115,
45,
101,
120,
112,
97,
110,
100
],
"server_properties": [],
"ssl_cert_login_from": "distinguished_name",
"background_gc_target_interval": 60000,
"config_entry_decoder": {
"passphrase": "undefined"
},
"handshake_timeout": 10000,
"default_vhost": "/",
"lager_extra_sinks": [
"rabbit_log_lager_event",
"rabbit_log_channel_lager_event",
"rabbit_log_connection_lager_event",
"rabbit_log_ldap_lager_event",
"rabbit_log_mirroring_lager_event",
"rabbit_log_queue_lager_event",
"rabbit_log_ra_lager_event",
"rabbit_log_federation_lager_event",
"rabbit_log_shovel_lager_event",
"rabbit_log_upgrade_lager_event"
],
"vm_memory_high_watermark": 0.4,
"lager_default_file": [
47,
118,
97,
114,
47,
108,
111,
103,
47,
114,
97,
98,
98,
105,
116,
109,
113,
47,
114,
97,
98,
98,
105,
116,
64,
114,
97,
98,
98,
105,
116,
46,
108,
111,
103
],
"queue_explicit_gc_run_operation_threshold": 1000,
"vm_memory_calculation_strategy": "rss",
"mirroring_sync_batch_size": 4096,
"hipe_modules": [
"rabbit_reader",
"rabbit_channel",
"gen_server2",
"rabbit_exchange",
"rabbit_command_assembler",
"rabbit_framing_amqp_0_9_1",
"rabbit_basic",
"rabbit_event",
"lists",
"queue",
"priority_queue",
"rabbit_router",
"rabbit_trace",
"rabbit_misc",
"rabbit_binary_parser",
"rabbit_exchange_type_direct",
"rabbit_guid",
"rabbit_net",
"rabbit_amqqueue_process",
"rabbit_variable_queue",
"rabbit_binary_generator",
"rabbit_writer",
"delegate",
"gb_sets",
"lqueue",
"sets",
"orddict",
"rabbit_amqqueue",
"rabbit_limiter",
"gb_trees",
"rabbit_queue_index",
"rabbit_exchange_decorator",
"gen",
"dict",
"ordsets",
"file_handle_cache",
"rabbit_msg_store",
"array",
"rabbit_msg_store_ets_index",
"rabbit_msg_file",
"rabbit_exchange_type_fanout",
"rabbit_exchange_type_topic",
"mnesia",
"mnesia_lib",
"rpc",
"mnesia_tm",
"qlc",
"sofs",
"proplists",
"credit_flow",
"pmon",
"ssl_connection",
"tls_connection",
"ssl_record",
"tls_record",
"gen_fsm",
"ssl"
],
"channel_tick_interval": 60000,
"ssl_handshake_timeout": 5000,
"auth_mechanisms": [
"PLAIN",
"AMQPLAIN"
],
"hipe_compile": false,
"channel_max": 2047,
"vhost_restart_strategy": "continue",
"memory_monitor_interval": 2500,
"background_gc_enabled": false,
"queue_index_max_journal_entries": 32768,
"connection_max": "infinity",
"credit_flow_default_credit": [
400,
200
],
"auth_backends": [
"rabbit_auth_backend_internal"
],
"num_ssl_acceptors": 10,
"password_hashing_module": "rabbit_password_hashing_sha256",
"lager_log_root": [
47,
118,
97,
114,
47,
108,
111,
103,
47,
114,
97,
98,
98,
105,
116,
109,
113
],
"msg_store_io_batch_size": 4096,
"delegate_count": 16,
"msg_store_index_module": "rabbit_msg_store_ets_index",
"log": {
"file": {
"file": [
47,
118,
97,
114,
47,
108,
111,
103,
47,
114,
97,
98,
98,
105,
116,
109,
113,
47,
114,
97,
98,
98,
105,
116,
64,
114,
97,
98,
98,
105,
116,
46,
108,
111,
103
]
},
"categories": {
"upgrade": {
"file": [
47,
118,
97,
114,
47,
108,
111,
103,
47,
114,
97,
98,
98,
105,
116,
109,
113,
47,
114,
97,
98,
98,
105,
116,
64,
114,
97,
98,
98,
105,
116,
95,
117,
112,
103,
114,
97,
100,
101,
46,
108,
111,
103
]
}
}
},
"default_user": "guest",
"frame_max": 131072,
"queue_index_embed_msgs_below": 4096,
"cluster_keepalive_interval": 10000,
"mnesia_table_loading_retry_timeout": 30000,
"ssl_options": [],
"ssl_apps": [
"asn1",
"crypto",
"public_key",
"ssl"
],
"lazy_queue_explicit_gc_run_operation_threshold": 1000,
"feature_flags_file": [
47,
118,
97,
114,
47,
108,
105,
98,
47,
114,
97,
98,
98,
105,
116,
109,
113,
47,
109,
110,
101,
115,
105,
97,
47,
114,
97,
98,
98,
105,
116,
64,
114,
97,
98,
98,
105,
116,
45,
102,
101,
97,
116,
117,
114,
101,
95,
102,
108,
97,
103,
115
],
"trace_vhosts": [],
"default_pass": "guest",
"num_tcp_acceptors": 10,
"disk_monitor_failure_retry_interval": 120000,
"cluster_partition_handling": "ignore",
"ssl_listeners": [],
"default_permissions": [
".*",
".*",
".*"
],
"mirroring_flow_control": true,
"msg_store_credit_disc_bound": [
4000,
800
],
"fhc_write_buffering": true,
"halt_on_upgrade_failure": true,
"tcp_listen_options": {
"backlog": 128,
"nodelay": true,
"linger": [
true,
0
],
"exit_on_close": false
},
"vm_memory_high_watermark_paging_ratio": 0.5,
"heartbeat": 60,
"plugins_dir": [
47,
117,
115,
114,
47,
108,
105,
98,
47,
114,
97,
98,
98,
105,
116,
109,
113,
47,
112,
108,
117,
103,
105,
110,
115,
58,
47,
117,
115,
114,
47,
108,
105,
98,
47,
114,
97,
98,
98,
105,
116,
109,
113,
47,
108,
105,
98,
47,
114,
97,
98,
98,
105,
116,
109,
113,
95,
115,
101,
114,
118,
101,
114,
45,
51,
46,
56,
46,
50,
47,
112,
108,
117,
103,
105,
110,
115
],
"proxy_protocol": false,
"default_user_tags": [
"administrator"
],
"tcp_listeners": [
5672
],
"collect_statistics": "fine"
}
Use Erlang to display RabbitMQ log configuration parameter.
$ sudo rabbitmqctl eval 'application:get_env(rabbit, log).'
{ok,[{file,[{file,"/var/log/rabbitmq/rabbit@rabbit.log"}]},
{categories,[{upgrade,[{file,"/var/log/rabbitmq/rabbit@rabbit_upgrade.log"}]}]}]}
Use Erlang to display RabbitMQ loopback_users configuration parameter.
$ sudo rabbitmqctl eval 'application:get_env(rabbit, loopback_users).'
{ok,[<<"guest">>]}
Use Erlang to get RabbitMQ configuration parameters and extract log file.
$ sudo rabbitmqctl eval 'application:get_all_env(rabbit).' --formatter=json | jq --raw-output '.log.file.file | implode' /var/log/rabbitmq/rabbit@rabbit.log
These arrays are not so scary when you know how to convert an array of code point numbers to a string using implode function.