Docker 容器（MariaDb、AspNet）無法在 Compose 網絡上通信

Question

我已經設置了一個 Docker-Compose 文件，該文件創建了一個 mariadb 數據庫和 aspnet 后端（都來自我編寫的 docker 文件）。 如果我在 docker-compose 文件中公開端口並在 compose 之外運行容器（使用 localhost）或設置 network_mode: "host"，則應用程序會按預期進行交互。 但是，使用 compose 在容器之間生成任何命令的默認橋接網絡似乎超時。

我嘗試運行連接到同一網絡的網絡容器（nicolaka/netshoot）並通過 DNS 名稱 ping 相關容器。 該名稱解析為 IP 地址，然后 ping 掛起，我還運行並附加了 mysql 容器並嘗試連接到 mariadb 容器，這導致超時。

這一切看起來都是我的設置中的一些網絡問題。 下面列出的配置，任何幫助將不勝感激！

MariaDb DockerFile

ARG VERSION=10.4
FROM mariadb/server:${VERSION}
ENV MYSQL_ROOT_PASSWORD ****
EXPOSE 3306

AspNet DockerFile

FROM mcr.microsoft.com/dotnet/aspnet:5.0
# Container SetUp
EXPOSE 80
# .NET specific
COPY ToDoListBackEnd.Api/bin/Release/net5.0/publish ToDoListBackEnd/
WORKDIR /ToDoListBackEnd
ENTRYPOINT ["dotnet", "ToDoListBackEnd.Api.dll"]

撰寫文件：

version: '3.3'
services:
  db: # Service Hosting MariaDb
    build: ./Database
    container_name: todolist-database
    ports:
      - "6001:3306"
    volumes:
      - todo-db:/var/lib/mysql
    restart: always 
    environment:
      MYSQL_ROOT_PASSWORD: ***
      MYSQL_DATABASE: ToDoList
      MYSQL_USER: root
      MYSQL_PASSWORD: ***
    
  backend: # Backend C# Service
    build: ./BackEnd
    container_name: todolist-backend
    ports:
      - "5002:80"
    restart: always
    depends_on: 
      - db
    links: 
      - db
volumes:
  todo-db:

網絡配置

{
    "Name": "todolist_default",
    "Id": "6dd07863467b35ece5e00f400ca03c0c1b9950a5f8d5a6538b47889ac2dcae68",
    "Created": "2021-04-21T19:39:58.329215937+01:00",
    "Scope": "local",
    "Driver": "bridge",
    "EnableIPv6": false,
    "IPAM": {
        "Driver": "default",
        "Options": null,
        "Config": [
            {
                "Subnet": "172.23.0.0/16",
                "Gateway": "172.23.0.1"
            }
        ]
    },
    "Internal": false,
    "Attachable": true,
    "Ingress": false,
    "ConfigFrom": {
        "Network": ""
    },
    "ConfigOnly": false,
    "Containers": {
        "01f10355356ea8d194b9de6c6e9ead0af5398ad8d10dc743a70927c88532f3ef": {
            "Name": "todolist-database",
            "EndpointID": "9b69958ff0a1c9ff7cf62f3478965fdef0622fd3fe98922bebee4ebe72aa9508",
            "MacAddress": "02:42:ac:17:00:03",
            "IPv4Address": "172.23.0.3/16",
            "IPv6Address": ""
        },
        "356092a918beb6a0a021d369fd5f76e556e54ebad3c1b8fa626ce33fd66af579": {
            "Name": "mysqlTest",
            "EndpointID": "3ae06081e831c8f94bc36c59cd085561b81685da164011c5e6438ffd0d1bb6c2",
            "MacAddress": "02:42:ac:17:00:02",
            "IPv4Address": "172.23.0.2/16",
            "IPv6Address": ""
        },
        "61bbc2047065f01732ddd0e7db492c0708144cb6ede7ee0b5466c708c36d9639": {
            "Name": "todolist-backend",
            "EndpointID": "06c46938e05ba48955c75a63a65268d4259c30ad9bb7a23f2d15c04299d644da",
            "MacAddress": "02:42:ac:17:00:05",
            "IPv4Address": "172.23.0.5/16",
            "IPv6Address": ""
        }
    },
    "Options": {},
    "Labels": {
        "com.docker.compose.network": "default",
        "com.docker.compose.project": "todolist",
        "com.docker.compose.version": "1.29.1"
    },
    "CreatedTime": 1619030398329
}

來自 mariadb 容器內部的 my.cnf

# MariaDB database server configuration file.
#
# You can copy this file to one of:
# - "/etc/mysql/my.cnf" to set global options,
# - "~/.my.cnf" to set user-specific options.
# 
# One can use all long options that the program supports.
# Run program with --help to get a list of available options and with
# --print-defaults to see which it would actually understand and use.
#
# For explanations see
# http://dev.mysql.com/doc/mysql/en/server-system-variables.html

# This will be passed to all mysql clients
# It has been reported that passwords should be enclosed with ticks/quotes
# escpecially if they contain "#" chars...
# Remember to edit /etc/mysql/debian.cnf when changing the socket location.
[client]
port        = 3306
socket      = /var/run/mysqld/mysqld.sock

# Here is entries for some specific programs
# The following values assume you have at least 32M ram

# This was formally known as [safe_mysqld]. Both versions are currently parsed.
[mysqld_safe]
socket      = /var/run/mysqld/mysqld.sock
nice        = 0

[mysqld]
#
# * Basic Settings
#
#user       = mysql
pid-file    = /var/run/mysqld/mysqld.pid
socket      = /var/run/mysqld/mysqld.sock
port        = 3306
basedir     = /usr
datadir     = /var/lib/mysql
tmpdir      = /tmp
lc_messages_dir = /usr/share/mysql
lc_messages = en_US
#skip-external-locking
#
# Instead of skip-networking the default is now to listen only on
# localhost which is more compatible and is not less secure.
#bind-address       = 127.0.0.1
#
# * Fine Tuning
#
max_connections     = 100
connect_timeout     = 5
wait_timeout        = 600
max_allowed_packet  = 16M
thread_cache_size       = 128
sort_buffer_size    = 4M
bulk_insert_buffer_size = 16M
tmp_table_size      = 32M
max_heap_table_size = 32M
#
# * MyISAM
#
# This replaces the startup script and checks MyISAM tables if needed
# the first time they are touched. On error, make copy and try a repair.
myisam_recover_options = BACKUP
key_buffer_size     = 128M
#open-files-limit   = 2000
table_open_cache    = 400
myisam_sort_buffer_size = 512M
concurrent_insert   = 2
read_buffer_size    = 2M
read_rnd_buffer_size    = 1M
#
# * Query Cache Configuration
#
# Cache only tiny result sets, so we can fit more in the query cache.
query_cache_limit       = 128K
query_cache_size        = 64M
# for more write intensive setups, set to DEMAND or OFF
#query_cache_type       = DEMAND
#
# * Logging and Replication
#
# Both location gets rotated by the cronjob.
# Be aware that this log type is a performance killer.
# As of 5.1 you can enable the log at runtime!
#general_log_file        = /var/log/mysql/mysql.log
#general_log             = 1
#
# Error logging goes to syslog due to /etc/mysql/conf.d/mysqld_safe_syslog.cnf.
#
# we do want to know about network errors and such
#log_warnings       = 2
#
# Enable the slow query log to see queries with especially long duration
#slow_query_log[={0|1}]
slow_query_log_file = /var/log/mysql/mariadb-slow.log
long_query_time = 10
#log_slow_rate_limit    = 1000
#log_slow_verbosity = query_plan

#log-queries-not-using-indexes
#log_slow_admin_statements
#
# The following can be used as easy to replay backup logs or for replication.
# note: if you are setting up a replication slave, see README.Debian about
#       other settings you may need to change.
#server-id      = 1
#report_host        = master1
#auto_increment_increment = 2
#auto_increment_offset  = 1
#log_bin            = /var/log/mysql/mariadb-bin
#log_bin_index      = /var/log/mysql/mariadb-bin.index
# not fab for performance, but safer
#sync_binlog        = 1
expire_logs_days    = 10
max_binlog_size         = 100M
# slaves
#relay_log      = /var/log/mysql/relay-bin
#relay_log_index    = /var/log/mysql/relay-bin.index
#relay_log_info_file    = /var/log/mysql/relay-bin.info
#log_slave_updates
#read_only
#
# If applications support it, this stricter sql_mode prevents some
# mistakes like inserting invalid dates etc.
#sql_mode       = NO_ENGINE_SUBSTITUTION,TRADITIONAL
#
# * InnoDB
#
# InnoDB is enabled by default with a 10MB datafile in /var/lib/mysql/.
# Read the manual for more InnoDB related options. There are many!
default_storage_engine  = InnoDB
innodb_buffer_pool_size = 256M
innodb_log_buffer_size  = 8M
innodb_file_per_table   = 1
innodb_open_files   = 400
innodb_io_capacity  = 400
innodb_flush_method = O_DIRECT
#
# * Security Features
#
# Read the manual, too, if you want chroot!
# chroot = /var/lib/mysql/
#
# For generating SSL certificates I recommend the OpenSSL GUI "tinyca".
#
# ssl-ca=/etc/mysql/cacert.pem
# ssl-cert=/etc/mysql/server-cert.pem
# ssl-key=/etc/mysql/server-key.pem

#
# * Galera-related settings
#
[galera]
# Mandatory settings
#wsrep_on=ON
#wsrep_provider=
#wsrep_cluster_address=
#binlog_format=row
#default_storage_engine=InnoDB
#innodb_autoinc_lock_mode=2
#
# Allow server to accept connections on all interfaces.
#
bind-address=0.0.0.0
#
# Optional setting
#wsrep_slave_threads=1
#innodb_flush_log_at_trx_commit=0

[mysqldump]
quick
quote-names
max_allowed_packet  = 16M

[mysql]
#no-auto-rehash # faster start of mysql but no tab completion

[isamchk]
key_buffer      = 16M

#
# * IMPORTANT: Additional settings that can override those from this file!
#   The files must end with '.cnf', otherwise they'll be ignored.
#
!include /etc/mysql/mariadb.cnf
!includedir /etc/mysql/conf.d/

再次感謝任何幫助！

Answer 1

所以我似乎已經解決了這個問題。 原來是操作系統（Arch Linux）而不是 docker 的問題，我通過在 Windows 系統上運行相同的文件發現了這一點。

對於任何 Arch 用戶，我在https://bbs.archlinux.org/viewtopic.php?pid=1973008#p1973008列出了我的步驟