我在本地主机上有mysql,并且能够使用root登录:
[root@pocnnr1n1 etc]# mysql -u root -p
Enter password:
Welcome to the MariaDB monitor. Commands end with ; or \g.
Your MariaDB connection id is 8
Server version: 5.5.52-MariaDB MariaDB Server
Copyright (c) 2000, 2016, Oracle, MariaDB Corporation Ab and others.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
MariaDB [(none)]> show databases;
+--------------------+
| Database |
+--------------------+
现在,我在此主机上有一个docker,其ip地址为'172.17.0.2'
从docker到主机ping没问题:
root@eaa90c1059f2:/app/airflow/dags# ping 192.168.211.251 PING 192.168.211.251 (192.168.211.251): 56 data bytes 64 bytes from 192.168.211.251: icmp_seq=0 ttl=64 time=0.208 ms
从docker上,如果我手动运行pymysql以创建连接:
conn= pymysql.connect(host='192.168.211.251', port=3306, user='root',
passwd='root', db='airflow')
我遇到以下错误:
pymysql.err.OperationalError:(1045,“拒绝用户访问 'root'@'172.17.0.2'(使用密码:是)“)
如果我将IP地址更改为“ 172.17.0.2”,如下所示:
conn= pymysql.connect(host='172.17.0.2', port=3306, user='root',
passwd='root', db='airflow')
I have the following error:
pymysql.err.OperationalError:(2003年,“无法连接到MySQL服务器, '172.17.0.2'([Errno 111]连接被拒绝)“)
更新: my.cnf如下:
[mysqld]
transaction-isolation = READ-COMMITTED
# Disabling symbolic-links is recommended to prevent assorted security risks;
# to do so, uncomment this line:
# symbolic-links = 0
key_buffer = 16M
key_buffer_size = 32M
max_allowed_packet = 32M
thread_stack = 256K
thread_cache_size = 64
query_cache_limit = 8M
query_cache_size = 64M
query_cache_type = 1
max_connections = 550
#expire_logs_days = 10
#max_binlog_size = 100M
#log_bin should be on a disk with enough free space. Replace '/var/lib/mysql/mysql_binary_log' with an appropriate path for your system
#and chown the specified folder to the mysql user.
log_bin=/var/lib/mysql/mysql_binary_log
#explicit_defaults_for_timestamp = 1
binlog_format = mixed
read_buffer_size = 2M
read_rnd_buffer_size = 16M
sort_buffer_size = 8M
join_buffer_size = 8M
# InnoDB settings
innodb_file_per_table = 1
innodb_flush_log_at_trx_commit = 2
innodb_log_buffer_size = 64M
innodb_buffer_pool_size = 4G
innodb_thread_concurrency = 8
innodb_flush_method = O_DIRECT
innodb_log_file_size = 512M
[mysqld_safe]
log-error=/var/log/mariadb/mariadb.log
pid-file=/var/run/mariadb/mariadb.pid
答案 0 :(得分:1)
我刚刚进行了如下整理:
此问题与未授予用户airflow@172.17.0.2的权限有关
我需要做的是在主机的mysql上,
GRANT ALL TO 'airflow'@'172.17.0.2' IDENTIFIED BY 'airflow' ;
FLUSH PRIVILEGES;
如果您这样做,这很清楚:select User, Host, Password from mysql.user;
现在可以使用pymysql创建连接。
为方便测试,不必在气流达格中对其进行测试,只能使用python(但必须导入pymysql)进行测试
希望获得帮助。
答案 1 :(得分:0)
这是来自mysql-doc
确保未将服务器配置为忽略网络 连接或(如果您尝试远程连接)它具有 未配置为仅在其网络接口上本地侦听。 如果服务器以--skip-networking启动,它将不接受 完全没有TCP / IP连接。如果服务器是从以下位置启动的 --bind-address = 127.0.0.1,它将仅在环回接口上本地侦听TCP / IP连接,而不接受远程 连接。
当docker网络中的某些内容尝试连接localhost时,它还试图从远程访问mysql。
找到my.cnf
(通常为/etc/mysql/my.cnf
)注释行bind-address=127.0.0.1