Rabbitmq
在全新安裝 Redhat8 時，在新 EC2 實例上，RabbitMQ 失敗，failed_to_start_child
更新：
如果我做：
yum upgrade我懂了：
Skip Packages With Broken Dependencies When我該如何解決？
舊帖：
我在這裡找到了文件
erl_crash.dump：/var/lib/rabbitmq/erl_crash.dump如果我這樣做：
head -n 50 /var/lib/rabbitmq/erl_crash.dump我得到：
=erl_crash_dump:0.5 Tue Mar 1 20:00:36 2022 Slogan: Kernel pid terminated (application_controller) ({application_start_failure,credentials_obfuscation,{{shutdown,{failed_to_start_child,credentials_obfuscaton_svc,{undef,[{crypto,macN,[hmac,sha256,<<185, System version: Erlang/OTP 22 [erts-10.4.4] [source] [64-bit] [smp:2:2] [ds:2:2:10] [async-threads:1] Compiled: Fri Sep 6 18:47:55 2019 Taints: crypto Atoms: 13923 Calling Thread: scheduler:1 =scheduler:1 Scheduler Sleep Info Flags: Scheduler Sleep Info Aux Work: THR_PRGR_LATER_OP Current Port: Run Queue Max Length: 0 Run Queue High Length: 0 Run Queue Normal Length: 0 Run Queue Low Length: 0 Run Queue Port Length: 0 Run Queue Flags: OUT_OF_WORK | HALFTIME_OUT_OF_WORK | NONEMPTY | EXEC Current Process: <0.0.0> Current Process State: Running Current Process Internal State: ACT_PRIO_NORMAL | USR_PRIO_NORMAL | PRQ_PRIO_NORMAL | ACTIVE | RUNNING Current Process Program counter: 0x0000ffff5cd5d020 (init:printable_list/1 + 24) Current Process CP: 0x0000ffff5cd5dcc8 (init:boot_loop/2 + 1944) Current Process Limited Stack Trace: 0x0000ffff5a93b9f0:SReturn addr 0xACD16DC0 (<terminate process normally>)我不知道怎麼讀這個。是
failed_to_start_child錯誤嗎？如果是，那是什麼意思？我如何解決它？我有一個新的 EC2 實例和一個全新的 Redhat8 安裝，所有東西都安裝了
yumordnf但我在 RabbitMQ 上不斷收到錯誤，它試圖啟動但立即失敗。如果我做：tail -n 500 /var/log/messages然後我看到這條消息，一遍又一遍地重複：
Mar 1 18:23:47 ip-172-31-56-22 rabbitmq-server[350248]: {"Kernel pid terminated",application_controller,"{application_start_failure,credentials_obfuscation,{{shutdown,{failed_to_start_child,credentials_obfuscaton_svc,{undef,[{crypto,macN,[hmac,sha256,<<80,84,120,32,178,183,28,70,220,34,20,13,145,69,180,207,145,18,30,76,255,205,110,198,166,173,68,94,39,2,201,5,116,139,211,47,32,125,29,33,161,98,58,78,127,162,252,146,192,110,153,88,149,58,190,136,74,66,191,238,168,79,190,2,120,197,45,101,48,216,168,33,102,142,44,160,25,38,229,27,132,117,91,23,171,84,244,84,230,129,67,131,57,152,36,238,207,222,137,164,79,90,128,114,75,111,48,205,252,239,253,68,193,32,61,190,149,117,145,224,144,191,59,109,247,145,102,240>>,[<<167,114,26,126,33,160,146,70,65,253,176,24,5,41,155,193>>,<<0,0,0,1>>],32],[]},{credentials_obfuscation_pbe,xor_sum,7,[{file,\"src/credentials_obfuscation_pbe.erl\"},{line,160}]},{credentials_obfuscation_pbe,blocks,10,[{file,\"src/credentials_obfuscation_pbe.erl\"},{line,152}]},{credentials_obfuscation_pbe,make_key,5,[{file,\"src/credentials_obfuscation_pbe.erl\"},{line,94}]},{credentials_obfuscation_pbe,encrypt,5,[{file,\"src/credentials_obfuscation_pbe.erl\"},{line,76}]},{credentials_obfuscation_svc,check,3,[{file,\"src/credentials_obfuscation_svc.erl\"},{line,163}]},{credentials_obfuscation_svc,init_state,0,[{file,\"src/credentials_obfuscation_svc.erl\"},{line,133}]},{gen_server,init_it,2,[{file,\"gen_server.erl\"},{line,374}]}]}}},{credentials_obfuscation_app,start,[normal,[]]}}}"} Mar 1 18:23:47 ip-172-31-56-22 rabbitmq-server[350248]: Kernel pid terminated (application_controller) ({application_start_failure,credentials_obfuscation,{{shutdown,{failed_to_start_child,credentials_obfuscaton_svc,{undef,[{crypto,macN,[hmac,sha256,<<80,8 Mar 1 18:23:47 ip-172-31-56-22 rabbitmq-server[350248]: #015 Mar 1 18:23:47 ip-172-31-56-22 rabbitmq-server[350248]: Crash dump is being written to: erl_crash.dump...done Mar 1 18:23:47 ip-172-31-56-22 systemd[1]: rabbitmq-server.service: Main process exited, code=exited, status=1/FAILURE Mar 1 18:23:47 ip-172-31-56-22 systemd[1]: rabbitmq-server.service: Failed with result 'exit-code'. Mar 1 18:23:47 ip-172-31-56-22 systemd[1]: Failed to start RabbitMQ broker.我正在努力思考問題所在。我相信我已經打開了所有必要的埠。
Crash dump is being written to: erl_crash.dump...done我讀過這個：
我已經在安全組上打開了 4369 埠，但這並沒有幫助。
如果我執行：
epmd -names我得到：
epmd: up and running on port 4369 with data所以這是有效的，但 RabbitMQ 不是。
如果我這樣做：
rabbitmqctl start_app我得到：
Starting node rabbit@ip-172-31-56-22 ... Error: unable to perform an operation on node 'rabbit@ip-172-31-56-22'. Please see diagnostics information and suggestions below. Most common reasons for this are: * Target node is unreachable (e.g. due to hostname resolution, TCP connection or firewall issues) * CLI tool fails to authenticate with the server (e.g. due to CLI tool's Erlang cookie not matching that of the server) * Target node is not running In addition to the diagnostics info below: * See the CLI, clustering and networking guides on https://rabbitmq.com/documentation.html to learn more * Consult server logs on node rabbit@ip-172-31-56-22 * If target node is configured to use long node names, don't forget to use --longnames with CLI tools DIAGNOSTICS =========== attempted to contact: ['rabbit@ip-172-31-56-22'] rabbit@ip-172-31-56-22: * connected to epmd (port 4369) on ip-172-31-56-22 * epmd reports: node 'rabbit' not running at all no other nodes on ip-172-31-56-22 * suggestion: start the node Current node details: * node name: 'rabbitmqcli-871-rabbit@ip-12-131-56-22' * effective user's home directory: /var/lib/rabbitmq * Erlang cookie hash: Gug6Jfak+f3/k+ww6vhA==我的印像是安裝失敗。每當我使用時，我都會看到一些關於 RabbitMQ 的資訊，即使我的命令與 RabbitMQ 無關。例如，我這樣做：
sudo yum install screen部分輸出是：
rabbitmq_rabbitmq-server 5.2 kB/s | 1.8 kB 00:00 rabbitmq_rabbitmq-server-source 3.4 kB/s | 951 B 00:00每當我使用時，我都會看到這兩行
yum install，每次使用都會提到 RabbitMQ，yum install就好像有一些奇怪的記憶體失敗問題一樣，這讓我感到不安。我也看到了這個：
[/usr/lib/tmpfiles.d/rabbitmq-server.conf:1] Line references path below legacy directory /var/run/, updating /var/run/rabbitmq → /run/rabbitmq; please update the tmpfiles.d/ drop-in file accordingly.
顯然有些安裝出錯了。執行時我注意到此消息
yum install：“跳過依賴項損壞的包”
我無法解決這個問題。我不得不放棄那個 EC2 實例並重新開始一個新的 EC2 實例。
基於我發現的幾件事：
- https://stackoverflow.com/questions/66918508/failed-to-start-rabbitmq-redentials-obfuscation
- https://github.com/rabbitmq/rabbitmq-server/discussions/2881
似乎升級 RabbitMQ 可能會解決這個問題：https ://www.rabbitmq.com/install-rpm.html