英文:
go-mysql connection refused when connecting to kubernetes mysql service
问题
我在使用标准包连接到一个 MySQL 实例时遇到了问题。这是我的连接字符串/日志：
[13 Nov 16 13:53 +0000] [INFO] connecting to MySQL.. root:awsomepass@tcp(a-mysql-0:3340)/db?charset=utf8&parseTime=True&loc=Local
2016/11/13 13:53:25 dial tcp 10.108.1.35:3340: getsockopt: connection refused
我尝试了以下操作：
GRANT ALL PRIVILEGES ON . TO 'root'@'%' WITH GRANT OPTION;
这是我建立连接的方式，只是基本的字符串拼接：
db, err := sql.Open("mysql", "root:awsomepass@tcp(a-mysql-0:3340)/db?charset=utf8&parseTime=True&loc=Local")
if err != nil {
log.Fatal(err)
}
我可以通过不同的 pod 使用 mysql-client 连接到该服务。
可以连接到服务，不需要端口
/ # mysql -u root -h a-mysql-0 -p
Enter password:
Welcome to the MariaDB monitor. Commands end with ; or \g.
Your MySQL connection id is 11
Server version: 5.7.16 MySQL Community Server (GPL)
Copyright (c) 2000, 2016, Oracle, MariaDB Corporation Ab and others.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
MySQL [(none)]> Ctrl-C -- exit!
Aborted
无法使用端口连接到服务
/ # mysql -u root -h a-mysql-0:3340 -p
Enter password:
ERROR 2005 (HY000): Unknown MySQL server host 'a-mysql-0:3340' (-3)
还有 mysql-service：
kubectl describe svc a-mysql-0
Name: a-mysql-0
Namespace: default
Labels: name=a-mysql-0
tier=database
type=mysql
Selector: name=a-mysql-0,tier=database
Type: ClusterIP
IP: None
Port: a-mysql-0 3340/TCP
Endpoints: 10.108.1.35:3340
Session Affinity: None
No events.
我是否遗漏了什么或者权限有问题？
英文:
I have a problem when connecting to a mysql instance with a go app using standard package.
This is my connection string/log
[13 Nov 16 13:53 +0000] [INFO] connecting to MySQL.. root:awsomepass@tcp(a-mysql-0:3340)/db?charset=utf8&parseTime=True&loc=Local
2016/11/13 13:53:25 dial tcp 10.108.1.35:3340: getsockopt: connection refused
I tried
GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' WITH GRANT OPTION;
here is how I make connection, just basic, with string concatenation only
db, err := sql.Open("mysql", "root:awsomepass@tcp(a-mysql-0:3340)/db?charset=utf8&parseTime=True&loc=Local")
if err != nil {
log.Fatal(err)
}
I can ping the service, connect to it with mysql-client from a different pod.
# can connect without port for service
/ # mysql -u root -h a-mysql-0 -p
Enter password:
Welcome to the MariaDB monitor. Commands end with ; or \g.
Your MySQL connection id is 11
Server version: 5.7.16 MySQL Community Server (GPL)
Copyright (c) 2000, 2016, Oracle, MariaDB Corporation Ab and others.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
MySQL [(none)]> Ctrl-C -- exit!
Aborted
# can't' connect with port for service
/ # mysql -u root -h a-mysql-0:3340 -p
Enter password:
ERROR 2005 (HY000): Unknown MySQL server host 'a-mysql-0:3340' (-3)
and the mysql-service
➜ stg git:(develop) ✗ kubectl describe svc a-mysql-0
Name: a-mysql-0
Namespace: default
Labels: name=a-mysql-0
tier=database
type=mysql
Selector: name=a-mysql-0,tier=database
Type: ClusterIP
IP: None
Port: a-mysql-0 3340/TCP
Endpoints: 10.108.1.35:3340
Session Affinity: None
No events.
Is there anything I have missed or permission?
答案1
得分: 2
我从 Kubernetes Slack 收到了来自 mav 的回复。我正在访问 mysql-service 的错误 container-port。默认的 MySQL 端口是 3306，我以为我正在使用一个自定义容器，它暴露了 3340 端口。
英文:
got a response from kubernetes-slack, from mav. I am accessing the mysql-service to a wrong container-port. default mysql port was 3306. I thought I was using a custom container that exposes 3340.
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