我使用带有mysql官方图像的docker容器来创建超过11个数据库容器（container1到container11）。设置完成后，所有容器都运行正常，直到container9。在container10，它只启动约1分钟并再次停止。使用docker日志来检查容器，但我没有看到任何东西。停止container9，并重启container10。它再次运行良好。这种情况似乎只发生在我有9个mysql容器并试图提高第10个时。如果我停止其中一个，然后重新抬起它。那就没问题了。它是错误的吗？或者我想念码头桥的一些设置？
root@ec8dcb82f64d:/dev/shm# docker restart f4801b57c4cc
f4801b57c4cc
root@ec8dcb82f64d:/dev/shm# docker ps -a | grep f4801b57c4cc
f4801b57c4cc mysql/mysql-server:5.7 "/entrypoint.sh my..." 2 weeks ago Exited (1) 3 seconds ago db
root@ec8dcb82f64d:/dev/shm# docker logs f4801b57c4cc
Initializing database
Database initialized
MySQL init process in progress...
Warning: Unable to load '/usr/share/zoneinfo/iso3166.tab' as time zone. Skipping it.
Warning: Unable to load '/usr/share/zoneinfo/zone.tab' as time zone. Skipping it.
mysql: [Warning] Using a password on the command line interface can be insecure.
mysql: [Warning] Using a password on the command line interface can be insecure.
mysql: [Warning] Using a password on the command line interface can be insecure.
mysql: [Warning] Using a password on the command line interface can be insecure.
/entrypoint.sh: ignoring /docker-entrypoint-initdb.d/*
MySQL init process done. Ready for start up.
root@ec8dcb82f64d:/dev/shm#
我想我在一周之后就遇到了解决方案，尽管我不太明白会发生什么。以下是我尝试过的，到目前为止，我可以调出最多20个mysql容器，没有任何问题。
1：尝试创建一个虚拟mysql容器进行测试
$ docker run -e MYSQL_ROOT_PASSWORD=password mysql
Unable to find image 'mysql:latest' locally
latest: Pulling from library/mysql
...
Initializing database
2017-08-09T17:58:30.034595Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2017-08-09T17:58:30.039274Z 0 [Warning] InnoDB: io_setup() failed with EAGAIN. Will make 5 attempts before giving up.
2017-08-09T17:58:30.039294Z 0 [Warning] InnoDB: io_setup() attempt 1.
2017-08-09T17:58:30.539495Z 0 [Warning] InnoDB: io_setup() attempt 2.
2017-08-09T17:58:31.039701Z 0 [Warning] InnoDB: io_setup() attempt 3.
2017-08-09T17:58:31.539902Z 0 [Warning] InnoDB: io_setup() attempt 4.
2017-08-09T17:58:32.040115Z 0 [Warning] InnoDB: io_setup() attempt 5.
2017-08-09T17:58:32.540330Z 0 [ERROR] InnoDB: io_setup() failed with EAGAIN after 5 attempts.
2017-08-09T17:58:32.540378Z 0 [ERROR] InnoDB: Cannot initialize AIO sub-system
2017-08-09T17:58:32.540390Z 0 [ERROR] InnoDB: Plugin initialization aborted with error Generic error
2017-08-09T17:58:32.540401Z 0 [ERROR] Plugin 'InnoDB' init function returned error.
2017-08-09T17:58:32.540408Z 0 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
2017-08-09T17:58:32.540412Z 0 [ERROR] Failed to initialize plugins.
2017-08-09T17:58:32.540415Z 0 [ERROR] Aborting
并使用EAGAIN命中io_setup（）的错误代码失败
2：检查aio-max-nr的当前值
$ sysctl fs.aio-max-nr
fs.aio-max-nr = 65536
3：将aio-max-nr的值增加到2097152
$ sudo sysctl -w fs.aio-max-nr=2097152
3：启动mysql服务
4：尝试创建更多的mysql容器，并在没有问题的情况下调出原始容器
在后台运行docker events，然后尝试启动第10个容器。你肯定会看到出了什么问题。下面给出了一个示例，用于在启动时启动已退出的容器和错误。以下命令依次：
~$ sudo docker events &
[1] 9414
~$ sudo docker start 48137950f1b7
2017-08-03T00:01:18.971406558+05:30 network connect c79096ff0fef046d24b2a23907b3cc82c4df0838db2475909f8fa9f796a0418e (container=48137950f1b714797143529d63ec7221d3cbcd38bb6c8d20a241b06ddbd3d27a, name=bridge, type=bridge)
2017-08-03T00:01:19.305063392+05:30 container start 48137950f1b714797143529d63ec7221d3cbcd38bb6c8d20a241b06ddbd3d27a (image=ubuntu, name=modest_northcutt)
48137950f1b7
2017-08-03T00:01:19.305915636+05:30 container die 48137950f1b714797143529d63ec7221d3cbcd38bb6c8d20a241b06ddbd3d27a (exitCode=0, image=ubuntu, name=modest_northcutt)
希望你能搞清楚。