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У меня проблемы с доступом к контейнеру докеров базы данных Oracle XE (версия 2.3.0.4) через Telnet или SQLPLUS из моей хост-системы:

Это моя конфигурация Oracle XE и контейнера:

 docker port 54cb9336d8c3
1521/tcp -> 127.0.0.1:1521
  

Конфигурация Oracle:

 cat /opt/oracle/product/18c/dbhomeXE/network/admin/listener.ora
DEFAULT_SERVICE_LISTENER = XE

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = TCP)(HOST = 127.0.0.1)(PORT = 1521))
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
    )
  )

cat /opt/oracle/product/18c/dbhomeXE/network/admin/tnsnames.ora
XE =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = 127.0.0.1)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = XE)
    )
  )

LISTENER_XE =
  (ADDRESS = (PROTOCOL = TCP)(HOST = 127.0.0.1)(PORT = 1521))
  

вывод lsnrctl:

 lsnrctl status

LSNRCTL for Linux: Version 18.0.0.0.0 - Production on 05-SEP-2020 13:29:49

Copyright (c) 1991, 2018, Oracle.  All rights reserved.

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=127.0.0.1)(PORT=1521)))
STATUS of the LISTENER
------------------------
Alias                     LISTENER
Version                   TNSLSNR for Linux: Version 18.0.0.0.0 - Production
Start Date                04-SEP-2020 23:23:29
Uptime                    0 days 14 hr. 6 min. 20 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Default Service           XE
Listener Parameter File   /opt/oracle/product/18c/dbhomeXE/network/admin/listener.ora
Listener Log File         /opt/oracle/diag/tnslsnr/54cb9336d8c3/listener/alert/log.xml
Listening Endpoints Summary...
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=127.0.0.1)(PORT=1521)))
  (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521)))
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcps)(HOST=127.0.0.1)(PORT=5500))(Security=(my_wallet_directory=/opt/oracle/admin/XE/xdb_wallet))(Presentation=HTTP)(Session=RAW))
Services Summary...
Service "XE" has 1 instance(s).
  Instance "XE", status READY, has 1 handler(s) for this service...
Service "XEXDB" has 1 instance(s).
  Instance "XE", status READY, has 1 handler(s) for this service...
Service "ae7e9c04366c09a3e053030011ac556e" has 1 instance(s).
  Instance "XE", status READY, has 1 handler(s) for this service...
Service "xepdb1" has 1 instance(s).
  Instance "XE", status READY, has 1 handler(s) for this service...
The command completed successfully
  

Я могу получить доступ через SQLPLUS из контейнера Docker к базе данных XE через SQLPLUS, но подключиться к БД из моей хост-системы невозможно.

Telnet к порту 1521 (в контейнере Docker)

 [root@54cb9336d8c3 admin]# telnet localhost 1521
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
  

Telnet к порту 1521 (с хоста macOS)

 telnet localhost 1521
Trying ::1...
telnet: connect to address ::1: Connection refused
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
Connection closed by foreign host.
  

Я что-то пропустил в конфигурации Oracle DB или контейнера Docker?

Прошло некоторое время с тех пор, как я настроил Oracle DB, но мне кажется, что ваш слушатель настроен только на прослушивание интерфейса обратной связи.

Вместо этого вам следует попробовать эту конфигурацию:

 LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = TCP)(HOST = 0.0.0.0)(PORT = 1521))
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
    )
  )
  

Для сравнения, вот listener.ora из официального образа докера Oracle Database Enterprise Edition:

 LISTENER =   (DESCRIPTION_LIST =     (DESCRIPTION =       (ADDRESS = (PROTOCOL = TCP)(HOST = 0.0.0.0)(PORT = 1521))       (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))     )   ) 
DIAG_ADR_ENABLED = off
SSL_VERSION = 1.0
  

и tnsnames.ora из того же образа:

 ORCLCDB =   (DESCRIPTION =     (ADDRESS = (PROTOCOL = TCP)(HOST = 0.0.0.0)(PORT = 1521))     (CONNECT_DATA =       (SERVER = DEDICATED)       (SERVICE_NAME = ORCLCDB.localdomain)     )   ) 
ORCLPDB1 =   (DESCRIPTION =     (ADDRESS = (PROTOCOL = TCP)(HOST = 0.0.0.0)(PORT = 1521))     (CONNECT_DATA =       (SERVER = DEDICATED)       (SERVICE_NAME = ORCLPDB1.localdomain)     )   )