小贝子编程

Mongo Docker 镜像官方页面提供的 YAML 在 CentOS 上不起作用



下面的YAML文件(最初在这里提供(在Windows和macOS docker环境中工作。但当我在CentOS环境中运行它时，mongo-express无法连接到MongoDB服务，它也不会显示在localhost:8081的浏览器中。我想这是DNSs和将Mongo映射到相应容器IP地址的问题。我该怎么解决这个问题？

# Use root/example as user/password credentials
version: '3.1'
services:
mongo:
image: mongo
restart: always
environment:
MONGO_INITDB_ROOT_USERNAME: root
MONGO_INITDB_ROOT_PASSWORD: example
mongo-express:
image: mongo-express
restart: always
ports:
- 8081:8081
environment:
ME_CONFIG_MONGODB_ADMINUSERNAME: root
ME_CONFIG_MONGODB_ADMINPASSWORD: example

来自mongo服务的日志：

{"t":{"$date":"2021-01-01T00:15:56.059+00:00"},"s":"I",  "c":"CONTROL",  "id":23285,   "ctx":"main","msg":"Automatically disabling TLS 1.0, to force-enable TLS 1.0 specify --sslDisabledProtocols 'none'"}
{"t":{"$date":"2021-01-01T00:15:56.063+00:00"},"s":"W",  "c":"ASIO",     "id":22601,   "ctx":"main","msg":"No TransportLayer configured during NetworkInterface startup"}
{"t":{"$date":"2021-01-01T00:15:56.063+00:00"},"s":"I",  "c":"NETWORK",  "id":4648601, "ctx":"main","msg":"Implicit TCP FastOpen unavailable. If TCP FastOpen is required, set tcpFastOpenServer, tcpFastOpenClient, and tcpFastOpenQueueSize."}
killing process with pid: 29
{"t":{"$date":"2021-01-01T00:15:56.063+00:00"},"s":"I",  "c":"CONTROL",  "id":23377,   "ctx":"SignalHandler","msg":"Received signal","attr":{"signal":15,"error":"Terminated"}}
{"t":{"$date":"2021-01-01T00:15:56.063+00:00"},"s":"I",  "c":"CONTROL",  "id":23378,   "ctx":"SignalHandler","msg":"Signal was sent by kill(2)","attr":{"pid":83,"uid":999}}
{"t":{"$date":"2021-01-01T00:15:56.063+00:00"},"s":"I",  "c":"CONTROL",  "id":23381,   "ctx":"SignalHandler","msg":"will terminate after current cmd ends"}
{"t":{"$date":"2021-01-01T00:15:56.063+00:00"},"s":"I",  "c":"REPL",     "id":4784900, "ctx":"SignalHandler","msg":"Stepping down the ReplicationCoordinator for shutdown","attr":{"waitTimeMillis":10000}}
{"t":{"$date":"2021-01-01T00:15:56.064+00:00"},"s":"I",  "c":"COMMAND",  "id":4784901, "ctx":"SignalHandler","msg":"Shutting down the MirrorMaestro"}
{"t":{"$date":"2021-01-01T00:15:56.064+00:00"},"s":"I",  "c":"SHARDING", "id":4784902, "ctx":"SignalHandler","msg":"Shutting down the WaitForMajorityService"}
{"t":{"$date":"2021-01-01T00:15:56.064+00:00"},"s":"I",  "c":"CONTROL",  "id":4784903, "ctx":"SignalHandler","msg":"Shutting down the LogicalSessionCache"}
{"t":{"$date":"2021-01-01T00:15:56.064+00:00"},"s":"I",  "c":"NETWORK",  "id":20562,   "ctx":"SignalHandler","msg":"Shutdown: going to close listening sockets"}
{"t":{"$date":"2021-01-01T00:15:56.064+00:00"},"s":"I",  "c":"NETWORK",  "id":23017,   "ctx":"listener","msg":"removing socket file","attr":{"path":"/tmp/mongodb-27017.sock"}}
{"t":{"$date":"2021-01-01T00:15:56.064+00:00"},"s":"I",  "c":"NETWORK",  "id":4784905, "ctx":"SignalHandler","msg":"Shutting down the global connection pool"}
{"t":{"$date":"2021-01-01T00:15:56.064+00:00"},"s":"I",  "c":"STORAGE",  "id":4784906, "ctx":"SignalHandler","msg":"Shutting down the FlowControlTicketholder"}
{"t":{"$date":"2021-01-01T00:15:56.064+00:00"},"s":"I",  "c":"-",        "id":20520,   "ctx":"SignalHandler","msg":"Stopping further Flow Control ticket acquisitions."}
{"t":{"$date":"2021-01-01T00:15:56.064+00:00"},"s":"I",  "c":"STORAGE",  "id":4784908, "ctx":"SignalHandler","msg":"Shutting down the PeriodicThreadToAbortExpiredTransactions"}
{"t":{"$date":"2021-01-01T00:15:56.064+00:00"},"s":"I",  "c":"STORAGE",  "id":4784934, "ctx":"SignalHandler","msg":"Shutting down the PeriodicThreadToDecreaseSnapshotHistoryCachePressure"}
{"t":{"$date":"2021-01-01T00:15:56.065+00:00"},"s":"I",  "c":"REPL",     "id":4784909, "ctx":"SignalHandler","msg":"Shutting down the ReplicationCoordinator"}
{"t":{"$date":"2021-01-01T00:15:56.065+00:00"},"s":"I",  "c":"SHARDING", "id":4784910, "ctx":"SignalHandler","msg":"Shutting down the ShardingInitializationMongoD"}
{"t":{"$date":"2021-01-01T00:15:56.065+00:00"},"s":"I",  "c":"REPL",     "id":4784911, "ctx":"SignalHandler","msg":"Enqueuing the ReplicationStateTransitionLock for shutdown"}
{"t":{"$date":"2021-01-01T00:15:56.065+00:00"},"s":"I",  "c":"-",        "id":4784912, "ctx":"SignalHandler","msg":"Killing all operations for shutdown"}
{"t":{"$date":"2021-01-01T00:15:56.065+00:00"},"s":"I",  "c":"-",        "id":4695300, "ctx":"SignalHandler","msg":"Interrupted all currently running operations","attr":{"opsKilled":3}}
{"t":{"$date":"2021-01-01T00:15:56.065+00:00"},"s":"I",  "c":"COMMAND",  "id":4784913, "ctx":"SignalHandler","msg":"Shutting down all open transactions"}
{"t":{"$date":"2021-01-01T00:15:56.065+00:00"},"s":"I",  "c":"REPL",     "id":4784914, "ctx":"SignalHandler","msg":"Acquiring the ReplicationStateTransitionLock for shutdown"}
{"t":{"$date":"2021-01-01T00:15:56.065+00:00"},"s":"I",  "c":"INDEX",    "id":4784915, "ctx":"SignalHandler","msg":"Shutting down the IndexBuildsCoordinator"}
{"t":{"$date":"2021-01-01T00:15:56.065+00:00"},"s":"I",  "c":"REPL",     "id":4784916, "ctx":"SignalHandler","msg":"Reacquiring the ReplicationStateTransitionLock for shutdown"}
{"t":{"$date":"2021-01-01T00:15:56.065+00:00"},"s":"I",  "c":"REPL",     "id":4784917, "ctx":"SignalHandler","msg":"Attempting to mark clean shutdown"}
{"t":{"$date":"2021-01-01T00:15:56.065+00:00"},"s":"I",  "c":"NETWORK",  "id":4784918, "ctx":"SignalHandler","msg":"Shutting down the ReplicaSetMonitor"}
{"t":{"$date":"2021-01-01T00:15:56.065+00:00"},"s":"I",  "c":"SHARDING", "id":4784921, "ctx":"SignalHandler","msg":"Shutting down the MigrationUtilExecutor"}
{"t":{"$date":"2021-01-01T00:15:56.065+00:00"},"s":"I",  "c":"CONTROL",  "id":4784925, "ctx":"SignalHandler","msg":"Shutting down free monitoring"}
{"t":{"$date":"2021-01-01T00:15:56.065+00:00"},"s":"I",  "c":"CONTROL",  "id":20609,   "ctx":"SignalHandler","msg":"Shutting down free monitoring"}
{"t":{"$date":"2021-01-01T00:15:56.065+00:00"},"s":"I",  "c":"FTDC",     "id":4784926, "ctx":"SignalHandler","msg":"Shutting down full-time data capture"}
{"t":{"$date":"2021-01-01T00:15:56.065+00:00"},"s":"I",  "c":"FTDC",     "id":20626,   "ctx":"SignalHandler","msg":"Shutting down full-time diagnostic data capture"}
{"t":{"$date":"2021-01-01T00:15:56.067+00:00"},"s":"I",  "c":"STORAGE",  "id":4784927, "ctx":"SignalHandler","msg":"Shutting down the HealthLog"}
{"t":{"$date":"2021-01-01T00:15:56.067+00:00"},"s":"I",  "c":"STORAGE",  "id":4784929, "ctx":"SignalHandler","msg":"Acquiring the global lock for shutdown"}
{"t":{"$date":"2021-01-01T00:15:56.067+00:00"},"s":"I",  "c":"STORAGE",  "id":4784930, "ctx":"SignalHandler","msg":"Shutting down the storage engine"}
{"t":{"$date":"2021-01-01T00:15:56.067+00:00"},"s":"I",  "c":"STORAGE",  "id":20282,   "ctx":"SignalHandler","msg":"Deregistering all the collections"}
{"t":{"$date":"2021-01-01T00:15:56.067+00:00"},"s":"I",  "c":"STORAGE",  "id":22261,   "ctx":"SignalHandler","msg":"Timestamp monitor shutting down"}
{"t":{"$date":"2021-01-01T00:15:56.067+00:00"},"s":"I",  "c":"STORAGE",  "id":22317,   "ctx":"SignalHandler","msg":"WiredTigerKVEngine shutting down"}
{"t":{"$date":"2021-01-01T00:15:56.067+00:00"},"s":"I",  "c":"STORAGE",  "id":22318,   "ctx":"SignalHandler","msg":"Shutting down session sweeper thread"}
{"t":{"$date":"2021-01-01T00:15:56.067+00:00"},"s":"I",  "c":"STORAGE",  "id":22319,   "ctx":"SignalHandler","msg":"Finished shutting down session sweeper thread"}
{"t":{"$date":"2021-01-01T00:15:56.067+00:00"},"s":"I",  "c":"STORAGE",  "id":22320,   "ctx":"SignalHandler","msg":"Shutting down journal flusher thread"}
{"t":{"$date":"2021-01-01T00:15:56.068+00:00"},"s":"I",  "c":"STORAGE",  "id":22321,   "ctx":"SignalHandler","msg":"Finished shutting down journal flusher thread"}
{"t":{"$date":"2021-01-01T00:15:56.068+00:00"},"s":"I",  "c":"STORAGE",  "id":22322,   "ctx":"SignalHandler","msg":"Shutting down checkpoint thread"}
{"t":{"$date":"2021-01-01T00:15:56.068+00:00"},"s":"I",  "c":"STORAGE",  "id":22323,   "ctx":"SignalHandler","msg":"Finished shutting down checkpoint thread"}
{"t":{"$date":"2021-01-01T00:15:56.068+00:00"},"s":"I",  "c":"STORAGE",  "id":4795902, "ctx":"SignalHandler","msg":"Closing WiredTiger","attr":{"closeConfig":"leak_memory=true,"}}
{"t":{"$date":"2021-01-01T00:15:56.074+00:00"},"s":"I",  "c":"STORAGE",  "id":4795901, "ctx":"SignalHandler","msg":"WiredTiger closed","attr":{"durationMillis":6}}
{"t":{"$date":"2021-01-01T00:15:56.074+00:00"},"s":"I",  "c":"STORAGE",  "id":22279,   "ctx":"SignalHandler","msg":"shutdown: removing fs lock..."}
{"t":{"$date":"2021-01-01T00:15:56.074+00:00"},"s":"I",  "c":"-",        "id":4784931, "ctx":"SignalHandler","msg":"Dropping the scope cache for shutdown"}
{"t":{"$date":"2021-01-01T00:15:56.074+00:00"},"s":"I",  "c":"CONTROL",  "id":20565,   "ctx":"SignalHandler","msg":"Now exiting"}
{"t":{"$date":"2021-01-01T00:15:56.074+00:00"},"s":"I",  "c":"CONTROL",  "id":23138,   "ctx":"SignalHandler","msg":"Shutting down","attr":{"exitCode":0}}
MongoDB init process complete; ready for start up.
{"t":{"$date":"2021-01-01T00:15:57.181+00:00"},"s":"I",  "c":"CONTROL",  "id":23285,   "ctx":"main","msg":"Automatically disabling TLS 1.0, to force-enable TLS 1.0 specify --sslDisabledProtocols 'none'"}
{"t":{"$date":"2021-01-01T00:15:57.185+00:00"},"s":"W",  "c":"ASIO",     "id":22601,   "ctx":"main","msg":"No TransportLayer configured during NetworkInterface startup"}
{"t":{"$date":"2021-01-01T00:15:57.185+00:00"},"s":"I",  "c":"NETWORK",  "id":4648601, "ctx":"main","msg":"Implicit TCP FastOpen unavailable. If TCP FastOpen is required, set tcpFastOpenServer, tcpFastOpenClient, and tcpFastOpenQueueSize."}
{"t":{"$date":"2021-01-01T00:15:57.186+00:00"},"s":"I",  "c":"STORAGE",  "id":4615611, "ctx":"initandlisten","msg":"MongoDB starting","attr":{"pid":1,"port":27017,"dbPath":"/data/db","architecture":"64-bit","host":"973e354c35f7"}}
{"t":{"$date":"2021-01-01T00:15:57.186+00:00"},"s":"I",  "c":"CONTROL",  "id":23403,   "ctx":"initandlisten","msg":"Build Info","attr":{"buildInfo":{"version":"4.4.2","gitVersion":"15e73dc5738d2278b688f8929aee605fe4279b0e","openSSLVersion":"OpenSSL 1.1.1  11 Sep 2018","modules":[],"allocator":"tcmalloc","environment":{"distmod":"ubuntu1804","distarch":"x86_64","target_arch":"x86_64"}}}}
{"t":{"$date":"2021-01-01T00:15:57.186+00:00"},"s":"I",  "c":"CONTROL",  "id":51765,   "ctx":"initandlisten","msg":"Operating System","attr":{"os":{"name":"Ubuntu","version":"18.04"}}}
{"t":{"$date":"2021-01-01T00:15:57.186+00:00"},"s":"I",  "c":"CONTROL",  "id":21951,   "ctx":"initandlisten","msg":"Options set by command line","attr":{"options":{"net":{"bindIp":"*"},"security":{"authorization":"enabled"}}}}
{"t":{"$date":"2021-01-01T00:15:57.189+00:00"},"s":"I",  "c":"STORAGE",  "id":22270,   "ctx":"initandlisten","msg":"Storage engine to use detected by data files","attr":{"dbpath":"/data/db","storageEngine":"wiredTiger"}}
{"t":{"$date":"2021-01-01T00:15:57.189+00:00"},"s":"I",  "c":"STORAGE",  "id":22297,   "ctx":"initandlisten","msg":"Using the XFS filesystem is strongly recommended with the WiredTiger storage engine. See http://dochub.mongodb.org/core/prodnotes-filesystem","tags":["startupWarnings"]}
{"t":{"$date":"2021-01-01T00:15:57.189+00:00"},"s":"I",  "c":"STORAGE",  "id":22315,   "ctx":"initandlisten","msg":"Opening WiredTiger","attr":{"config":"create,cache_size=6656M,session_max=33000,eviction=(threads_min=4,threads_max=4),config_base=false,statistics=(fast),log=(enabled=true,archive=true,path=journal,compressor=snappy),file_manager=(close_idle_time=100000,close_scan_interval=10,close_handle_minimum=250),statistics_log=(wait=0),verbose=[recovery_progress,checkpoint_progress,compact_progress],"}}
{"t":{"$date":"2021-01-01T00:15:57.861+00:00"},"s":"I",  "c":"STORAGE",  "id":22430,   "ctx":"initandlisten","msg":"WiredTiger message","attr":{"message":"[1609460157:861019][1:0x7f184105dac0], txn-recover: [WT_VERB_RECOVERY_PROGRESS] Recovering log 1 through 2"}}
{"t":{"$date":"2021-01-01T00:15:57.969+00:00"},"s":"I",  "c":"STORAGE",  "id":22430,   "ctx":"initandlisten","msg":"WiredTiger message","attr":{"message":"[1609460157:969647][1:0x7f184105dac0], txn-recover: [WT_VERB_RECOVERY_PROGRESS] Recovering log 2 through 2"}}
{"t":{"$date":"2021-01-01T00:15:58.064+00:00"},"s":"I",  "c":"STORAGE",  "id":22430,   "ctx":"initandlisten","msg":"WiredTiger message","attr":{"message":"[1609460158:64534][1:0x7f184105dac0], txn-recover: [WT_VERB_RECOVERY | WT_VERB_RECOVERY_PROGRESS] Main recovery loop: starting at 1/29568 to 2/256"}}
{"t":{"$date":"2021-01-01T00:15:58.175+00:00"},"s":"I",  "c":"STORAGE",  "id":22430,   "ctx":"initandlisten","msg":"WiredTiger message","attr":{"message":"[1609460158:175353][1:0x7f184105dac0], txn-recover: [WT_VERB_RECOVERY_PROGRESS] Recovering log 1 through 2"}}
{"t":{"$date":"2021-01-01T00:15:58.249+00:00"},"s":"I",  "c":"STORAGE",  "id":22430,   "ctx":"initandlisten","msg":"WiredTiger message","attr":{"message":"[1609460158:249021][1:0x7f184105dac0], txn-recover: [WT_VERB_RECOVERY_PROGRESS] Recovering log 2 through 2"}}
{"t":{"$date":"2021-01-01T00:15:58.301+00:00"},"s":"I",  "c":"STORAGE",  "id":22430,   "ctx":"initandlisten","msg":"WiredTiger message","attr":{"message":"[1609460158:301066][1:0x7f184105dac0], txn-recover: [WT_VERB_RECOVERY | WT_VERB_RECOVERY_PROGRESS] Set global recovery timestamp: (0, 0)"}}
{"t":{"$date":"2021-01-01T00:15:58.301+00:00"},"s":"I",  "c":"STORAGE",  "id":22430,   "ctx":"initandlisten","msg":"WiredTiger message","attr":{"message":"[1609460158:301126][1:0x7f184105dac0], txn-recover: [WT_VERB_RECOVERY | WT_VERB_RECOVERY_PROGRESS] Set global oldest timestamp: (0, 0)"}}
{"t":{"$date":"2021-01-01T00:15:58.317+00:00"},"s":"I",  "c":"STORAGE",  "id":4795906, "ctx":"initandlisten","msg":"WiredTiger opened","attr":{"durationMillis":1128}}
{"t":{"$date":"2021-01-01T00:15:58.317+00:00"},"s":"I",  "c":"RECOVERY", "id":23987,   "ctx":"initandlisten","msg":"WiredTiger recoveryTimestamp","attr":{"recoveryTimestamp":{"$timestamp":{"t":0,"i":0}}}}
{"t":{"$date":"2021-01-01T00:15:58.318+00:00"},"s":"I",  "c":"STORAGE",  "id":4366408, "ctx":"initandlisten","msg":"No table logging settings modifications are required for existing WiredTiger tables","attr":{"loggingEnabled":true}}
{"t":{"$date":"2021-01-01T00:15:58.320+00:00"},"s":"I",  "c":"STORAGE",  "id":22262,   "ctx":"initandlisten","msg":"Timestamp monitor starting"}
{"t":{"$date":"2021-01-01T00:15:58.321+00:00"},"s":"I",  "c":"CONTROL",  "id":22161,   "ctx":"initandlisten","msg":"You are running in OpenVZ which can cause issues on versions of RHEL older than RHEL6","tags":["startupWarnings"]}
{"t":{"$date":"2021-01-01T00:15:58.324+00:00"},"s":"I",  "c":"STORAGE",  "id":20536,   "ctx":"initandlisten","msg":"Flow Control is enabled on this deployment"}
{"t":{"$date":"2021-01-01T00:15:58.325+00:00"},"s":"I",  "c":"FTDC",     "id":20625,   "ctx":"initandlisten","msg":"Initializing full-time diagnostic data capture","attr":{"dataDirectory":"/data/db/diagnostic.data"}}
{"t":{"$date":"2021-01-01T00:15:58.334+00:00"},"s":"I",  "c":"NETWORK",  "id":23015,   "ctx":"listener","msg":"Listening on","attr":{"address":"/tmp/mongodb-27017.sock"}}
{"t":{"$date":"2021-01-01T00:15:58.334+00:00"},"s":"I",  "c":"NETWORK",  "id":23015,   "ctx":"listener","msg":"Listening on","attr":{"address":"0.0.0.0"}}
{"t":{"$date":"2021-01-01T00:15:58.334+00:00"},"s":"I",  "c":"NETWORK",  "id":23016,   "ctx":"listener","msg":"Waiting for connections","attr":{"port":27017,"ssl":"off"}}

来自mongo-express服务的日志：

Mongo Express server listening at http://0.0.0.0:8081
Server is open to allow connections from anyone (0.0.0.0)
basicAuth credentials are "admin:pass", it is recommended you change this in your config.js!
/node_modules/mongodb/lib/server.js:265
process.nextTick(function() { throw err; })
^
Error [MongoError]: failed to connect to server [mongo:27017] on first connect
at Pool.<anonymous> (/node_modules/mongodb-core/lib/topologies/server.js:326:35)
at Pool.emit (events.js:314:20)
at Connection.<anonymous> (/node_modules/mongodb-core/lib/connection/pool.js:270:12)
at Object.onceWrapper (events.js:421:26)
at Connection.emit (events.js:314:20)
at Socket.<anonymous> (/node_modules/mongodb-core/lib/connection/connection.js:175:49)
at Object.onceWrapper (events.js:421:26)
at Socket.emit (events.js:314:20)
at emitErrorNT (internal/streams/destroy.js:92:8)
at emitErrorAndCloseNT (internal/streams/destroy.js:60:3)
Waiting for mongo:27017...
/docker-entrypoint.sh: line 14: mongo: Try again
/docker-entrypoint.sh: line 14: /dev/tcp/mongo/27017: Invalid argument
Fri Jan  1 00:17:21 UTC 2021 retrying to connect to mongo:27017 (2/5)
/docker-entrypoint.sh: line 14: mongo: Try again
/docker-entrypoint.sh: line 14: /dev/tcp/mongo/27017: Invalid argument
Fri Jan  1 00:17:27 UTC 2021 retrying to connect to mongo:27017 (3/5)
/docker-entrypoint.sh: line 14: mongo: Try again
/docker-entrypoint.sh: line 14: /dev/tcp/mongo/27017: Invalid argument
Fri Jan  1 00:17:33 UTC 2021 retrying to connect to mongo:27017 (4/5)
/docker-entrypoint.sh: line 14: mongo: Try again
/docker-entrypoint.sh: line 14: /dev/tcp/mongo/27017: Invalid argument
Fri Jan  1 00:17:39 UTC 2021 retrying to connect to mongo:27017 (5/5)
/docker-entrypoint.sh: line 14: mongo: Try again
/docker-entrypoint.sh: line 14: /dev/tcp/mongo/27017: Invalid argument

通常mongo express的重试次数为5次，可能数据库在docker centos env上的连接时间比windows/macos更长。。如果执行docker exec -it nameofmongocontainer mongo -uroot -pexample，则可以检查数据库是否工作，然后执行类似show dbs;的操作

在mongo express设法与数据库建立连接之前，你在我的docker windows env上提到了一个DNS问题，所以它不是centos docker env独有的。。

潜在的修复方法：您可以将脚本添加到docker compose文件中，该文件的重试次数可以增加到20次。。这里有一个例子(将docker-entrypoint.sh脚本保存在与docker-compose文件相同的位置(

#!/bin/bash
set -eo pipefail
# This is a very small modification of the original docker script taken from
# https://github.com/mongo-express/mongo-express-docker/blob/master/docker-entrypoint.sh
# with only change being the modified value of max_tries=20 instead of original 5,
# to give the main mongodb container enough time to start and be connectable to.
# Also, see https://docs.docker.com/compose/startup-order/
# if command does not start with mongo-express, run the command instead of the entrypoint
if [ "${1}" != "mongo-express" ]; then
exec "$@"
fi
function wait_tcp_port {
local host="$1" port="$2"
local max_tries=20 tries=1
# see http://tldp.org/LDP/abs/html/devref1.html for description of this syntax.
while ! exec 6<>/dev/tcp/$host/$port && [[ $tries -lt $max_tries ]]; do
sleep 10s
tries=$(( tries + 1 ))
echo "$(date) retrying to connect to $host:$port ($tries/$max_tries)"
done
exec 6>&-
}
# if ME_CONFIG_MONGODB_SERVER has a comma in it, we're pointing to a replica set (https://github.com/mongo-express/mongo-express-docker/issues/21)
if [[ "$ME_CONFIG_MONGODB_SERVER" != *,* ]]; then
# wait for the mongo server to be available
echo Waiting for ${ME_CONFIG_MONGODB_SERVER}:${ME_CONFIG_MONGODB_PORT:-27017}...
wait_tcp_port "${ME_CONFIG_MONGODB_SERVER}" "${ME_CONFIG_MONGODB_PORT:-27017}"
fi
# run mongo-express
exec node app

docker撰写的文件将是

version: '3.1'
services:
mongo:
image: mongo
restart: always
environment:
MONGO_INITDB_ROOT_USERNAME: root
MONGO_INITDB_ROOT_PASSWORD: example
mongo-express:
image: mongo-express
restart: always
ports:
- 8081:8081
environment:
ME_CONFIG_MONGODB_ADMINUSERNAME: root
ME_CONFIG_MONGODB_ADMINPASSWORD: example
volumes: 
- ./docker-entrypoint.sh:/docker-entrypoint.sh

也许是Centos的问题？你能做的是分别做这些步骤

  1. docker network create mongo-test
  2. docker run -d --name mongo -e MONGO_INITDB_ROOT_USERNAME=root -e MONGO_INITDB_ROOT_PASSWORD=example --net mongo-test mongo
  3. docker run -d --name mongo-express -e ME_CONFIG_MONGODB_ADMINUSERNAME=root -e ME_CONFIG_MONGODB_ADMINPASSWORD=example --net mongo-test -p 8081:8081 mongo-express

一个潜在的问题是centos不允许任何容器使用"-p〃；尝试运行测试docker run --rm --name test --net mongo-test -p 8081:80 httpd，然后检查您的localhost:80

试试这个：

# Use root/example as user/password credentials
version: '3.1'
services:
mongo:
image: mongo
container_name: mongo
restart: always
environment:
MONGO_INITDB_ROOT_USERNAME: root
MONGO_INITDB_ROOT_PASSWORD: example
ports:
- 27017:27017
mongo-express:
image: mongo-express
restart: always
ports:
- 8081:8081
environment:
ME_CONFIG_MONGODB_ADMINUSERNAME: root
ME_CONFIG_MONGODB_ADMINPASSWORD: example
links:
- "mongo"
depends_on:
- "mongo"

如果你想，请尝试这个(工作示例(：

version: '3'
services:
mongo:
image: mongo
restart: always
container_name: my_mongo
ports:
- "27017:27017"
environment:
MONGO_INITDB_ROOT_USERNAME: root
MONGO_INITDB_ROOT_PASSWORD: example
volumes:
- ./data/db:/data/db
- ./data/configdb:/data/configdb
mongo-express:
image: mongo-express
restart: always
container_name: my_mongo_express
ports:
- "8081:8081"
environment:
ME_CONFIG_MONGODB_ADMINUSERNAME: root
ME_CONFIG_MONGODB_ADMINPASSWORD: example
ME_CONFIG_BASICAUTH_USERNAME: user
ME_CONFIG_BASICAUTH_PASSWORD: example
depends_on:
- mongo

volumes:
node_modules:

如果您认为存在问题，也可以尝试使用不同的名称或端口公开Mongo服务。在这种情况下，您还必须相应地更改MongoExpress服务中的各个变量(ME_CONFIG_MONGODB_SERVER和ME_CONFIG_MONGODB_PORT(-

无论哪种方式，涉及这两项服务的网络是否正确创建？

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