从外部容器的MySQL内部错误

Question

我建立了一个MySQL服务器映像，可以运行它的容器，我也可以从另一个容器访问它就好了，上周有一些日子，我的笔记本电脑上运行Docker 17.05.0-ceUbuntu 16.04。然后，昨天我无法从外部访问MySQL。它开始给我的错误：ERROR 2013 (HY000): Lost connection to MySQL server at 'reading initial communication packet', system error: 0 "Internal error/check (Not system error)"

这里是Dockerfile内容：

$ cat mysql/Dockerfile 
FROM ubuntu:16.04 

RUN apt-get update \ 
    && apt-get install -y libncurses-dev \ 
    && apt-get install -y build-essential \ 
    && apt-get install -y cmake 

COPY mysql-5.6.30.tar.gz /usr/bin/ 
WORKDIR /usr/bin/ 
RUN gzip -d mysql-5.6.30.tar.gz \ 
    && tar -xvf mysql-5.6.30.tar \ 
    && ln -s mysql-5.6.30 mysql 

WORKDIR /usr/bin/mysql/ 
RUN mkdir install && mkdir install/data && mkdir install/var && mkdir install/etc && mkdir install/tmp 

RUN cd /usr/bin/mysql/ \ 
    && cmake \ 
    -DCMAKE_INSTALL_PREFIX=/usr/bin/mysql/install \ 
    -DWITH_INNOBASE_STORAGE_ENGINE=1 \ 
    -DMYSQL_DATADIR=/usr/bin/mysql/install/data \ 
    -DDOWNLOAD_BOOST=1 \ 
    -DWITH_BOOST=/usr/bin/mysql/install/boost \ 
    -DMYSQL_UNIX_ADDR=/usr/bin/mysql/install/tmp/mysql.sock \ 
    && make \ 
    && make install \ 
    && make clean 

EXPOSE 3306 

COPY startup.sh install/startup.sh 

COPY my.cnf install/my.cnf 

ENTRYPOINT ["/bin/bash", "install/startup.sh"] 

的my.cnf文件内容：

[mysqld] 
bind-address = 0.0.0.0 # Allow client binding from any IP address instead of just 127.0.0.1 
port   = 3307 
sql_mode  = NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION # This is strict mode: NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES 
socket   = /usr/bin/mysql/install/tmp/mysql.sock 
user   = root 
basedir   = /usr/bin/mysql/install 
datadir   = /usr/bin/mysql/install/data 
log-bin   = /usr/bin/mysql/install/mysql.bin.log 
log-error  = /usr/bin/mysql/install/mysql.error.log 
general-log-file  = /usr/bin/mysql/install/mysql.log 
slow-query-log-file = /usr/bin/mysql/install/mysql.slow.queries.log 
innodb_file_per_table = 1 
innodb_flush_log_at_trx_commit = 1 
sync_binlog = 1 
innodb_flush_method = O_DIRECT 
character-set-server = utf8mb4 
collation-server = utf8mb4_unicode_ci 
init-connect = 'SET NAMES utf8mb4' 
character-set-client-handshake = FALSE 
wait_timeout = 28800 # amount of seconds during inactivity that MySQL will wait before it will close a connection on a non-interactive connection 
interactive_timeout = 28800 # same, but for interactive sessions 
[client] 
socket = /usr/bin/mysql/install/tmp/mysql.sock 
default-character-set = utf8mb4 
[mysql] 
default-character-set = utf8mb4 

的startup.sh文件内容：

#!/bin/bash -x 

if [ ! -f /usr/bin/mysql/install/data/ibdata1 ]; then 
    chmod 755 /usr/bin/mysql/install/scripts/mysql_install_db 
    sleep 1 # Needed to avoid running the script when this mysql_install_db file has not yet been released by the permissions change 
    /usr/bin/mysql/install/scripts/mysql_install_db \ 
    --no-defaults \ 
    --explicit_defaults_for_timestamp \ 
    --basedir=/usr/bin/mysql/install \ 
    --datadir=/usr/bin/mysql/install/data \ 
    --tmpdir=/usr/bin/mysql/install/tmp \ 
    --lc-messages-dir=/usr/bin/mysql/install/share 

    /usr/bin/mysql/install/bin/mysqld_safe --defaults-file=/usr/bin/mysql/install/my.cnf & 
    sleep 10s 
    echo "GRANT ALL ON *.* TO root@'%' IDENTIFIED BY 'root' WITH GRANT OPTION; FLUSH PRIVILEGES" | /usr/bin/mysql/install/bin/mysql 
    tail -f /etc/hosts 
else 
    /usr/bin/mysql/install/bin/mysqld_safe --defaults-file=/usr/bin/mysql/install/my.cnf 
fi 

而且我可以和co一起运行它mmand：

docker run -d -p 3307:3306 -v /home/stephane/dev/php/learnintouch/docker/mysql/data:/usr/bin/mysql/install/data --name mysql stephaneeybert/mysql:5.6.30 

我可以看到端口有一个开放的状态：

nmap -p 3307 localhost 

我可以进入它的bash shell：

docker exec -it mysql bash 

，并从容器内，我登录就好：

/usr/bin/mysql/install/bin/mysql -u root -p 

但是如果我想从主机登录：

cd programs/install/mariadb/; bin/mysql -h localhost -P 3307 --protocol=tcp -u root -p 

它给我的留言：

ERROR 2013 (HY000): Lost connection to MySQL server at 'reading initial communication packet', system error: 0 "Internal error/check (Not system error)" 

Answer 1

容器暴露端口3306

FROM ubuntu:16.04 
# ... 
EXPOSE 3306 
# ... 

MySQL是在集装箱港口3307听，它应该是3306在这里。

[mysqld] 
bind-address = 0.0.0.0 
port   = 3307 

然后搬运工向前容器端口3306到主机3307

docker run -d -p 3307:3306