如果输入命令docker ps -a，对应的docker退出状态显示为类似下图：

那么一般是由于mysql使用的内存过多，导致系统杀死了对应的进程，具体日志如下：

[root@hwsrv-660820 ~]# dmesg | grep mysql
[2385711.565861] [18140]   999 18140   345829    99076     280        0             0 mysqld
[2385712.140775] Out of memory: Kill process 18140 (mysqld) score 391 or sacrifice child
[2385712.144326] Killed process 18140 (mysqld) total-vm:1383316kB, anon-rss:396304kB, file-rss:0kB, shmem-rss:0kB
[2395985.302167] [21948]   999 21948   349640   101803     287        0             0 mysqld
[2395985.355604] Out of memory: Kill process 21948 (mysqld) score 401 or sacrifice child
[2395985.359331] Killed process 21948 (mysqld) total-vm:1398560kB, anon-rss:407212kB, file-rss:0kB, shmem-rss:0kB
[2439399.422277] [27375]   999 27375   349640   101778     284        0             0 mysqld
[2439399.439670] Out of memory: Kill process 27375 (mysqld) score 401 or sacrifice child
[2439399.443138] Killed process 27375 (mysqld) total-vm:1398560kB, anon-rss:407112kB, file-rss:0kB, shmem-rss:0kB
[2442731.234931] [27807]   999 27807   349640   101851     288        0             0 mysqld
[2442731.274965] Out of memory: Kill process 27807 (mysqld) score 402 or sacrifice child
[2442731.278334] Killed process 27807 (mysqld) total-vm:1398560kB, anon-rss:407404kB, file-rss:0kB, shmem-rss:0kB

可以看到虽然反复启动多次 但不一会儿就自动结束了

解决方法有2种

1.升级服务器内存容量

2.配置mysql，限制其内存占用，具体怎么做可以百度