Docker：麻烦连接到mysql，networking问题？
我有一个持久卷的WordPress和MySQL容器。 我一直在试图学习docker，并在这个过程中错误地删除了旧的docker-compose.yml和除了mysql之外的所有卷。 我现在已经将其重新创build到了撰写文件中，但是每次启动机器时，都无法连接到MySQL服务器。 任何人都可以指出我要去哪里错了。
我怀疑我与这两者之间的联系有问题，但我不确定。
泊坞窗，compose.yml：
version: '2' services: wp.spm: restart: always image: wordpress:latest ports: - "8080:80" environment: WORDPRESS_DB_HOST: localhost:3306 WORDPRESS_DB_USER: spm WORDPRESS_DB_PASSWORD: Ivietoo2Phah8xay WORDPRESS_DB_NAME: spm links: - mysql.5.7 working_dir: /var/www/html volumes: - ./wp-content:/var/www/html/wp-content mysql.5.7: restart: always image: mysql:5.7 ports: - 3306:3306 environment: MYSQL_ROOT_PASSWORD: root # TODO: Change this MYSQL_USER: spm MYSQL_PASS: Ivietoo2Phah8xay MYSQL_DATABASE: spm volumes: - db_data:/var/lib/mysql volumes: db_data: 日志：
$ docker-compose up Pulling mysql.5.7 (mysql:5.7)... 5.7: Pulling from library/mysql 75a822cd7888: Pull complete b8d5846e536a: Pull complete b75e9152a170: Pull complete 832e6b030496: Pull complete fe4a6c835905: Pull complete c3f247e29ab1: Pull complete 21be3e562071: Pull complete c7399d6bf033: Pull complete ccdaeae6c735: Pull complete 713c7d65b0d3: Pull complete 86c18539deb2: Pull complete Digest: sha256:9ef4478a3aa597f59b2266d5702f55f29acc468b5bf3518c3c90cbca4e243823 Status: Downloaded newer image for mysql:5.7 Pulling wp.spm (wordpress:latest)... latest: Pulling from library/wordpress 75a822cd7888: Already exists e4d8a4e038be: Pull complete 81d4d961577a: Pull complete f0a3d7c702e3: Pull complete a4b7d2c4c9cc: Pull complete de3fbbff60a9: Pull complete 336c38203cc2: Pull complete 628c443fd26f: Pull complete 6b43451e2e60: Pull complete a4dc6da381e6: Pull complete 771a9ee2bb6a: Pull complete 3862c25af8ee: Pull complete a3bf90f1df74: Pull complete 4564f4870a3e: Pull complete ec9c03f98075: Pull complete 5f4dfa2bfbb4: Pull complete 69feb6fb40db: Pull complete 5f129a65fac7: Pull complete Digest: sha256:0bb659eafa22cdb9f14bc05d17be97132842eb122eb8ff346ecafe7553f48f22 Status: Downloaded newer image for wordpress:latest Creating googleserver_mysql.5.7_1 Creating googleserver_wp.spm_1 Attaching to googleserver_mysql.5.7_1, googleserver_wp.spm_1 mysql.5.7_1 | 2017-01-09T11:07:44.271254Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details). mysql.5.7_1 | 2017-01-09T11:07:44.278843Z 0 [Note] mysqld (mysqld 5.7.17) starting as process 1 ... wp.spm_1 | WordPress not found in /var/www/html - copying now... mysql.5.7_1 | 2017-01-09T11:07:44.347784Z 0 [Note] InnoDB: PUNCH HOLE support available mysql.5.7_1 | 2017-01-09T11:07:44.347937Z 0 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins mysql.5.7_1 | 2017-01-09T11:07:44.347956Z 0 [Note] InnoDB: Uses event mutexes mysql.5.7_1 | 2017-01-09T11:07:44.348024Z 0 [Note] InnoDB: GCC builtin __atomic_thread_fence() is used for memory barrier mysql.5.7_1 | 2017-01-09T11:07:44.348048Z 0 [Note] InnoDB: Compressed tables use zlib 1.2.3 mysql.5.7_1 | 2017-01-09T11:07:44.348060Z 0 [Note] InnoDB: Using Linux native AIO mysql.5.7_1 | 2017-01-09T11:07:44.356631Z 0 [Note] InnoDB: Number of pools: 1 mysql.5.7_1 | 2017-01-09T11:07:44.367564Z 0 [Note] InnoDB: Using CPU crc32 instructions mysql.5.7_1 | 2017-01-09T11:07:44.370949Z 0 [Note] InnoDB: Initializing buffer pool, total size = 128M, instances = 1, chunk size = 128M mysql.5.7_1 | 2017-01-09T11:07:44.419506Z 0 [Note] InnoDB: Completed initialization of buffer pool mysql.5.7_1 | 2017-01-09T11:07:44.476953Z 0 [Note] InnoDB: If the mysqld execution user is authorized, page cleaner thread priority can be changed. See the man page of setpriority(). mysql.5.7_1 | 2017-01-09T11:07:44.501029Z 0 [Note] InnoDB: Highest supported file format is Barracuda. wp.spm_1 | WARNING: /var/www/html is not empty - press Ctrl+C now if this is an error! wp.spm_1 | + ls -A wp.spm_1 | wp-content wp.spm_1 | + sleep 10 mysql.5.7_1 | 2017-01-09T11:07:44.614777Z 0 [Note] InnoDB: Creating shared tablespace for temporary tables mysql.5.7_1 | 2017-01-09T11:07:44.615567Z 0 [Note] InnoDB: Setting file './ibtmp1' size to 12 MB. Physically writing the file full; Please wait ... mysql.5.7_1 | 2017-01-09T11:07:45.135167Z 0 [Note] InnoDB: File './ibtmp1' size is now 12 MB. mysql.5.7_1 | 2017-01-09T11:07:45.137285Z 0 [Note] InnoDB: 96 redo rollback segment(s) found. 96 redo rollback segment(s) are active. mysql.5.7_1 | 2017-01-09T11:07:45.137414Z 0 [Note] InnoDB: 32 non-redo rollback segment(s) are active. mysql.5.7_1 | 2017-01-09T11:07:45.138586Z 0 [Note] InnoDB: Waiting for purge to start mysql.5.7_1 | 2017-01-09T11:07:45.189557Z 0 [Note] InnoDB: 5.7.17 started; log sequence number 12168868 mysql.5.7_1 | 2017-01-09T11:07:45.194278Z 0 [Note] Plugin 'FEDERATED' is disabled. mysql.5.7_1 | 2017-01-09T11:07:45.195063Z 0 [Note] InnoDB: Loading buffer pool(s) from /var/lib/mysql/ib_buffer_pool mysql.5.7_1 | 2017-01-09T11:07:45.223753Z 0 [Note] InnoDB: Buffer pool(s) load completed at 170109 11:07:45 mysql.5.7_1 | 2017-01-09T11:07:45.235736Z 0 [Warning] Failed to set up SSL because of the following SSL library error: SSL context is not usable without certificate and private key mysql.5.7_1 | 2017-01-09T11:07:45.237375Z 0 [Note] Server hostname (bind-address): '*'; port: 3306 mysql.5.7_1 | 2017-01-09T11:07:45.237759Z 0 [Note] IPv6 is available. mysql.5.7_1 | 2017-01-09T11:07:45.237877Z 0 [Note] - '::' resolves to '::'; mysql.5.7_1 | 2017-01-09T11:07:45.237961Z 0 [Note] Server socket created on IP: '::'. mysql.5.7_1 | 2017-01-09T11:07:45.295529Z 0 [Warning] 'db' entry 'sys mysql.sys@localhost' ignored in --skip-name-resolve mode. mysql.5.7_1 | 2017-01-09T11:07:45.296334Z 0 [Warning] 'proxies_priv' entry '@ root@localhost' ignored in --skip-name-resolve mode. mysql.5.7_1 | 2017-01-09T11:07:45.304463Z 0 [Warning] 'tables_priv' entry 'sys_config mysql.sys@localhost' ignored in --skip-name-resolve mode. mysql.5.7_1 | 2017-01-09T11:07:45.325375Z 0 [Note] Event Scheduler: Loaded 0 events mysql.5.7_1 | 2017-01-09T11:07:45.326559Z 0 [Note] Executing 'SELECT * FROM INFORMATION_SCHEMA.TABLES;' to get a list of tables using the deprecated partition engine. You may use the startup option '--disable-partition-engine-check' to skip this check. mysql.5.7_1 | 2017-01-09T11:07:45.326653Z 0 [Note] Beginning of list of non-natively partitioned tables mysql.5.7_1 | 2017-01-09T11:07:45.377612Z 0 [Note] End of list of non-natively partitioned tables mysql.5.7_1 | 2017-01-09T11:07:45.378560Z 0 [Note] mysqld: ready for connections. mysql.5.7_1 | Version: '5.7.17' socket: '/var/run/mysqld/mysqld.sock' port: 3306 MySQL Community Server (GPL) wp.spm_1 | Complete! WordPress has been successfully copied to /var/www/html wp.spm_1 | wp.spm_1 | Warning: mysqli::mysqli(): (HY000/2002): No such file or directory in - on line 19 wp.spm_1 | wp.spm_1 | MySQL Connection Error: (2002) No such file or directory wp.spm_1 | wp.spm_1 | Warning: mysqli::mysqli(): (HY000/2002): No such file or directory in - on line 19 wp.spm_1 | wp.spm_1 | MySQL Connection Error: (2002) No such file or directory
我想说的问题是你是连接你的WP实例与在本地主机设置的数据库，但这是不正确的，因为你的数据库是在服务器mysql.5.7 。 我会尝试下一个yaml文件：
version: '2' services: wp.spm: restart: always image: wordpress:latest ports: - "8080:80" environment: WORDPRESS_DB_HOST: mysql.5.7:3306 WORDPRESS_DB_USER: spm WORDPRESS_DB_PASSWORD: Ivietoo2Phah8xay WORDPRESS_DB_NAME: spm depends_on: - mysql.5.7 working_dir: /var/www/html volumes: - ./wp-content:/var/www/html/wp-content mysql.5.7: restart: always image: mysql:5.7 ports: - 3306:3306 environment: MYSQL_ROOT_PASSWORD: root # TODO: Change this MYSQL_USER: spm MYSQL_PASS: Ivietoo2Phah8xay MYSQL_DATABASE: spm volumes: - db_data:/var/lib/mysql volumes: db_data: