longgangbai

MySQL报错如下message from server: "Can't get hostname for your address"

在采用MySQL作为数据库时候，在JUnit4.4中测试通过，但是今天再次启动发现，启动报如下错误。开发的环境如下：

操作系统：window xp sp3

数据库： Mysql 5.1.39-ndb-7.0.9-cluster-gpl

spring版本：2.5.6

备注：

查看版本为：select version();

授权远程访问用户如下：

创建用户：

create user tbs identified by 123456;

使用Root给tbs用户授权：

grant all priviliges etransmit.* to tbs@'%' identified by '123456';

检查是否为远程访问用户：

use mysql ;

select user,host from user;

如果tbs的host字段为%表示，tbs用户可以从任何主机访问。

访问如下：

jdbc.driverClassName=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://198.120.3.72:3306/etransmit?useUnicode=true&characterEncoding=UTF-8&autoReconnect=true
#jdbc.url=jdbc:mysql://198.120.1.36:3306/etransmit?useUnicode=true&characterEncoding=UTF-8&autoReconnect=true
jdbc.username=tbs
jdbc.password=123456
#jdbc.password=root
# Time to wait for an open connection before timing out
# (in milliseconds)
jdbc.checkoutTimeout=5000

# Connection pool size
cpool.minPoolSize=10
cpool.maxPoolSize=25
cpool.initialPoolSize
# How long to keep unused connections around(in seconds)
# Note: MySQL times out idle connections after 8 hours(28,800 seconds)
# so ensure this value is below MySQL idle timeout
cpool.maxIdleTime=7200

# Acquiring new connections is slow, so eagerly retrieve extra connections
# when current pool size is reached
cpool.acquireIncrement=5

cpool.autoCommitOnClose=true

但是仍然有问题。

报错如下：

Exception in thread "main" org.springframework.transaction.CannotCreateTransactionException: Could not open JDBC Connection for transaction; nested exception is com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Server connection failure during transaction. Due to underlying exception: 'com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Communication link failure, message from server: "Can't get hostname for your address"'.

** BEGIN NESTED EXCEPTION **

com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException
MESSAGE: Communication link failure, message from server: "Can't get hostname for your address"

STACKTRACE:

com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Communication link failure, message from server: "Can't get hostname for your address"
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:353)
at com.mysql.jdbc.Util.getInstance(Util.java:336)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:985)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:957)
at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1040)
at com.mysql.jdbc.Connection.createNewIO(Connection.java:2078)
at com.mysql.jdbc.Connection.<init>(Connection.java:716)
at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:46)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:353)
at com.mysql.jdbc.Connection.getInstance(Connection.java:295)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:266)
at java.sql.DriverManager.getConnection(DriverManager.java:582)
at java.sql.DriverManager.getConnection(DriverManager.java:154)
at org.springframework.jdbc.datasource.DriverManagerDataSource.getConnectionFromDriverManager(DriverManagerDataSource.java:174)
at org.springframework.jdbc.datasource.DriverManagerDataSource.getConnectionFromDriver(DriverManagerDataSource.java:165)
at org.springframework.jdbc.datasource.AbstractDriverBasedDataSource.getConnectionFromDriver(AbstractDriverBasedDataSource.java:149)
at org.springframework.jdbc.datasource.AbstractDriverBasedDataSource.getConnection(AbstractDriverBasedDataSource.java:119)
at org.springframework.jdbc.datasource.DataSourceTransactionManager.doBegin(DataSourceTransactionManager.java:200)
at org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:374)
at org.springframework.transaction.interceptor.TransactionAspectSupport.createTransactionIfNecessary(TransactionAspectSupport.java:263)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:101)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
at $Proxy16.queryNodeByHostIp(Unknown Source)
at easyway.tbs.file.transport.core.FileTransportSysconfig.init(FileTransportSysconfig.java:158)
at easyway.tbs.file.transport.core.FileTransportManager.initApp(FileTransportManager.java:78)
at easyway.tbs.file.transport.core.FileTransportManagerMain.main(FileTransportManagerMain.java:12)

** END NESTED EXCEPTION **

Attempted reconnect 3 times. Giving up.
at org.springframework.jdbc.datasource.DataSourceTransactionManager.doBegin(DataSourceTransactionManager.java:238)
at org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:374)
at org.springframework.transaction.interceptor.TransactionAspectSupport.createTransactionIfNecessary(TransactionAspectSupport.java:263)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:101)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
at $Proxy16.queryNodeByHostIp(Unknown Source)
at easyway.tbs.file.transport.core.FileTransportSysconfig.init(FileTransportSysconfig.java:158)
at easyway.tbs.file.transport.core.FileTransportManager.initApp(FileTransportManager.java:78)
at easyway.tbs.file.transport.core.FileTransportManagerMain.main(FileTransportManagerMain.java:12)
Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Server connection failure during transaction. Due to underlying exception: 'com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Communication link failure, message from server: "Can't get hostname for your address"'.

** BEGIN NESTED EXCEPTION **

com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException
MESSAGE: Communication link failure, message from server: "Can't get hostname for your address"

STACKTRACE:

** END NESTED EXCEPTION **

Attempted reconnect 3 times. Giving up.
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:353)
at com.mysql.jdbc.Util.getInstance(Util.java:336)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:985)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:957)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:927)
at com.mysql.jdbc.Connection.createNewIO(Connection.java:2150)
at com.mysql.jdbc.Connection.<init>(Connection.java:716)
at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:46)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:353)
at com.mysql.jdbc.Connection.getInstance(Connection.java:295)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:266)
at java.sql.DriverManager.getConnection(DriverManager.java:582)
at java.sql.DriverManager.getConnection(DriverManager.java:154)
at org.springframework.jdbc.datasource.DriverManagerDataSource.getConnectionFromDriverManager(DriverManagerDataSource.java:174)
at org.springframework.jdbc.datasource.DriverManagerDataSource.getConnectionFromDriver(DriverManagerDataSource.java:165)
at org.springframework.jdbc.datasource.AbstractDriverBasedDataSource.getConnectionFromDriver(AbstractDriverBasedDataSource.java:149)
at org.springframework.jdbc.datasource.AbstractDriverBasedDataSource.getConnection(AbstractDriverBasedDataSource.java:119)
at org.springframework.jdbc.datasource.DataSourceTransactionManager.doBegin(DataSourceTransactionManager.java:200)
... 9 more
Exception in thread "Quartz Scheduler [quartzScheduler]" org.springframework.scheduling.SchedulingException: Could not start Quartz Scheduler after delay; nested exception is org.quartz.SchedulerConfigException: Failure occured during job recovery. [See nested exception: org.quartz.JobPersistenceException: Failed to obtain DB connection from data source 'springNonTxDataSource.quartzScheduler': com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Server connection failure during transaction. Due to underlying exception: 'com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Communication link failure, message from server: "Can't get hostname for your address"'.

** BEGIN NESTED EXCEPTION **

com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException
MESSAGE: Communication link failure, message from server: "Can't get hostname for your address"

STACKTRACE:

com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Communication link failure, message from server: "Can't get hostname for your address"
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:353)
at com.mysql.jdbc.Util.getInstance(Util.java:336)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:985)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:957)
at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1040)
at com.mysql.jdbc.Connection.createNewIO(Connection.java:2078)
at com.mysql.jdbc.Connection.<init>(Connection.java:716)
at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:46)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:353)
at com.mysql.jdbc.Connection.getInstance(Connection.java:295)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:266)
at java.sql.DriverManager.getConnection(DriverManager.java:582)
at java.sql.DriverManager.getConnection(DriverManager.java:154)
at org.springframework.jdbc.datasource.DriverManagerDataSource.getConnectionFromDriverManager(DriverManagerDataSource.java:174)
at org.springframework.jdbc.datasource.DriverManagerDataSource.getConnectionFromDriver(DriverManagerDataSource.java:165)
at org.springframework.jdbc.datasource.AbstractDriverBasedDataSource.getConnectionFromDriver(AbstractDriverBasedDataSource.java:149)
at org.springframework.jdbc.datasource.AbstractDriverBasedDataSource.getConnection(AbstractDriverBasedDataSource.java:119)
at org.springframework.scheduling.quartz.LocalDataSourceJobStore$2.getConnection(LocalDataSourceJobStore.java:125)
at org.quartz.utils.DBConnectionManager.getConnection(DBConnectionManager.java:108)
at org.quartz.impl.jdbcjobstore.JobStoreCMT.getNonManagedTXConnection(JobStoreCMT.java:162)
at org.quartz.impl.jdbcjobstore.JobStoreSupport.executeInNonManagedTXLock(JobStoreSupport.java:3729)
at org.quartz.impl.jdbcjobstore.JobStoreSupport.executeInNonManagedTXLock(JobStoreSupport.java:3701)
at org.quartz.impl.jdbcjobstore.JobStoreSupport.recoverJobs(JobStoreSupport.java:790)
at org.quartz.impl.jdbcjobstore.JobStoreSupport.schedulerStarted(JobStoreSupport.java:661)
at org.quartz.core.QuartzScheduler.start(QuartzScheduler.java:517)
at org.quartz.impl.StdScheduler.start(StdScheduler.java:143)
at org.springframework.scheduling.quartz.SchedulerFactoryBean$1.run(SchedulerFactoryBean.java:646)

** END NESTED EXCEPTION **

Attempted reconnect 3 times. Giving up. [See nested exception: com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Server connection failure during transaction. Due to underlying exception: 'com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Communication link failure, message from server: "Can't get hostname for your address"'.

** BEGIN NESTED EXCEPTION **

com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException
MESSAGE: Communication link failure, message from server: "Can't get hostname for your address"

STACKTRACE:

com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Communication link failure, message from server: "Can't get hostname for your address"
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:353)
at com.mysql.jdbc.Util.getInstance(Util.java:336)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:985)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:957)
at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1040)
at com.mysql.jdbc.Connection.createNewIO(Connection.java:2078)
at com.mysql.jdbc.Connection.<init>(Connection.java:716)
at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:46)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:353)
at com.mysql.jdbc.Connection.getInstance(Connection.java:295)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:266)
at java.sql.DriverManager.getConnection(DriverManager.java:582)
at java.sql.DriverManager.getConnection(DriverManager.java:154)
at org.springframework.jdbc.datasource.DriverManagerDataSource.getConnectionFromDriverManager(DriverManagerDataSource.java:174)
at org.springframework.jdbc.datasource.DriverManagerDataSource.getConnectionFromDriver(DriverManagerDataSource.java:165)
at org.springframework.jdbc.datasource.AbstractDriverBasedDataSource.getConnectionFromDriver(AbstractDriverBasedDataSource.java:149)
at org.springframework.jdbc.datasource.AbstractDriverBasedDataSource.getConnection(AbstractDriverBasedDataSource.java:119)
at org.springframework.scheduling.quartz.LocalDataSourceJobStore$2.getConnection(LocalDataSourceJobStore.java:125)
at org.quartz.utils.DBConnectionManager.getConnection(DBConnectionManager.java:108)
at org.quartz.impl.jdbcjobstore.JobStoreCMT.getNonManagedTXConnection(JobStoreCMT.java:162)
at org.quartz.impl.jdbcjobstore.JobStoreSupport.executeInNonManagedTXLock(JobStoreSupport.java:3729)
at org.quartz.impl.jdbcjobstore.JobStoreSupport.executeInNonManagedTXLock(JobStoreSupport.java:3701)
at org.quartz.impl.jdbcjobstore.JobStoreSupport.recoverJobs(JobStoreSupport.java:790)
at org.quartz.impl.jdbcjobstore.JobStoreSupport.schedulerStarted(JobStoreSupport.java:661)
at org.quartz.core.QuartzScheduler.start(QuartzScheduler.java:517)
at org.quartz.impl.StdScheduler.start(StdScheduler.java:143)
at org.springframework.scheduling.quartz.SchedulerFactoryBean$1.run(SchedulerFactoryBean.java:646)

** END NESTED EXCEPTION **

Attempted reconnect 3 times. Giving up.]]
at org.springframework.scheduling.quartz.SchedulerFactoryBean$1.run(SchedulerFactoryBean.java:649)
Caused by: org.quartz.SchedulerConfigException: Failure occured during job recovery. [See nested exception: org.quartz.JobPersistenceException: Failed to obtain DB connection from data source 'springNonTxDataSource.quartzScheduler': com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Server connection failure during transaction. Due to underlying exception: 'com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Communication link failure, message from server: "Can't get hostname for your address"'.

** BEGIN NESTED EXCEPTION **

com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException
MESSAGE: Communication link failure, message from server: "Can't get hostname for your address"

STACKTRACE:

com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Communication link failure, message from server: "Can't get hostname for your address"
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:353)
at com.mysql.jdbc.Util.getInstance(Util.java:336)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:985)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:957)
at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1040)
at com.mysql.jdbc.Connection.createNewIO(Connection.java:2078)
at com.mysql.jdbc.Connection.<init>(Connection.java:716)
at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:46)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:353)
at com.mysql.jdbc.Connection.getInstance(Connection.java:295)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:266)
at java.sql.DriverManager.getConnection(DriverManager.java:582)
at java.sql.DriverManager.getConnection(DriverManager.java:154)
at org.springframework.jdbc.datasource.DriverManagerDataSource.getConnectionFromDriverManager(DriverManagerDataSource.java:174)
at org.springframework.jdbc.datasource.DriverManagerDataSource.getConnectionFromDriver(DriverManagerDataSource.java:165)
at org.springframework.jdbc.datasource.AbstractDriverBasedDataSource.getConnectionFromDriver(AbstractDriverBasedDataSource.java:149)
at org.springframework.jdbc.datasource.AbstractDriverBasedDataSource.getConnection(AbstractDriverBasedDataSource.java:119)
at org.springframework.scheduling.quartz.LocalDataSourceJobStore$2.getConnection(LocalDataSourceJobStore.java:125)
at org.quartz.utils.DBConnectionManager.getConnection(DBConnectionManager.java:108)
at org.quartz.impl.jdbcjobstore.JobStoreCMT.getNonManagedTXConnection(JobStoreCMT.java:162)
at org.quartz.impl.jdbcjobstore.JobStoreSupport.executeInNonManagedTXLock(JobStoreSupport.java:3729)
at org.quartz.impl.jdbcjobstore.JobStoreSupport.executeInNonManagedTXLock(JobStoreSupport.java:3701)
at org.quartz.impl.jdbcjobstore.JobStoreSupport.recoverJobs(JobStoreSupport.java:790)
at org.quartz.impl.jdbcjobstore.JobStoreSupport.schedulerStarted(JobStoreSupport.java:661)
at org.quartz.core.QuartzScheduler.start(QuartzScheduler.java:517)
at org.quartz.impl.StdScheduler.start(StdScheduler.java:143)
at org.springframework.scheduling.quartz.SchedulerFactoryBean$1.run(SchedulerFactoryBean.java:646)

** END NESTED EXCEPTION **

** BEGIN NESTED EXCEPTION **

com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException
MESSAGE: Communication link failure, message from server: "Can't get hostname for your address"

STACKTRACE:

com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Communication link failure, message from server: "Can't get hostname for your address"
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:353)
at com.mysql.jdbc.Util.getInstance(Util.java:336)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:985)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:957)
at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1040)
at com.mysql.jdbc.Connection.createNewIO(Connection.java:2078)
at com.mysql.jdbc.Connection.<init>(Connection.java:716)
at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:46)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:353)
at com.mysql.jdbc.Connection.getInstance(Connection.java:295)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:266)
at java.sql.DriverManager.getConnection(DriverManager.java:582)
at java.sql.DriverManager.getConnection(DriverManager.java:154)
at org.springframework.jdbc.datasource.DriverManagerDataSource.getConnectionFromDriverManager(DriverManagerDataSource.java:174)
at org.springframework.jdbc.datasource.DriverManagerDataSource.getConnectionFromDriver(DriverManagerDataSource.java:165)
at org.springframework.jdbc.datasource.AbstractDriverBasedDataSource.getConnectionFromDriver(AbstractDriverBasedDataSource.java:149)
at org.springframework.jdbc.datasource.AbstractDriverBasedDataSource.getConnection(AbstractDriverBasedDataSource.java:119)
at org.springframework.scheduling.quartz.LocalDataSourceJobStore$2.getConnection(LocalDataSourceJobStore.java:125)
at org.quartz.utils.DBConnectionManager.getConnection(DBConnectionManager.java:108)
at org.quartz.impl.jdbcjobstore.JobStoreCMT.getNonManagedTXConnection(JobStoreCMT.java:162)
at org.quartz.impl.jdbcjobstore.JobStoreSupport.executeInNonManagedTXLock(JobStoreSupport.java:3729)
at org.quartz.impl.jdbcjobstore.JobStoreSupport.executeInNonManagedTXLock(JobStoreSupport.java:3701)
at org.quartz.impl.jdbcjobstore.JobStoreSupport.recoverJobs(JobStoreSupport.java:790)
at org.quartz.impl.jdbcjobstore.JobStoreSupport.schedulerStarted(JobStoreSupport.java:661)
at org.quartz.core.QuartzScheduler.start(QuartzScheduler.java:517)
at org.quartz.impl.StdScheduler.start(StdScheduler.java:143)
at org.springframework.scheduling.quartz.SchedulerFactoryBean$1.run(SchedulerFactoryBean.java:646)

** END NESTED EXCEPTION **

Attempted reconnect 3 times. Giving up.]]
at org.quartz.impl.jdbcjobstore.JobStoreSupport.schedulerStarted(JobStoreSupport.java:663)
at org.quartz.core.QuartzScheduler.start(QuartzScheduler.java:517)
at org.quartz.impl.StdScheduler.start(StdScheduler.java:143)
at org.springframework.scheduling.quartz.SchedulerFactoryBean$1.run(SchedulerFactoryBean.java:646)
Caused by: org.quartz.JobPersistenceException: Failed to obtain DB connection from data source 'springNonTxDataSource.quartzScheduler': com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Server connection failure during transaction. Due to underlying exception: 'com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Communication link failure, message from server: "Can't get hostname for your address"'.

** BEGIN NESTED EXCEPTION **

com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException
MESSAGE: Communication link failure, message from server: "Can't get hostname for your address"

STACKTRACE:

com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Communication link failure, message from server: "Can't get hostname for your address"
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:353)
at com.mysql.jdbc.Util.getInstance(Util.java:336)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:985)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:957)
at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1040)
at com.mysql.jdbc.Connection.createNewIO(Connection.java:2078)
at com.mysql.jdbc.Connection.<init>(Connection.java:716)
at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:46)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:353)
at com.mysql.jdbc.Connection.getInstance(Connection.java:295)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:266)
at java.sql.DriverManager.getConnection(DriverManager.java:582)
at java.sql.DriverManager.getConnection(DriverManager.java:154)
at org.springframework.jdbc.datasource.DriverManagerDataSource.getConnectionFromDriverManager(DriverManagerDataSource.java:174)
at org.springframework.jdbc.datasource.DriverManagerDataSource.getConnectionFromDriver(DriverManagerDataSource.java:165)
at org.springframework.jdbc.datasource.AbstractDriverBasedDataSource.getConnectionFromDriver(AbstractDriverBasedDataSource.java:149)
at org.springframework.jdbc.datasource.AbstractDriverBasedDataSource.getConnection(AbstractDriverBasedDataSource.java:119)
at org.springframework.scheduling.quartz.LocalDataSourceJobStore$2.getConnection(LocalDataSourceJobStore.java:125)
at org.quartz.utils.DBConnectionManager.getConnection(DBConnectionManager.java:108)
at org.quartz.impl.jdbcjobstore.JobStoreCMT.getNonManagedTXConnection(JobStoreCMT.java:162)
at org.quartz.impl.jdbcjobstore.JobStoreSupport.executeInNonManagedTXLock(JobStoreSupport.java:3729)
at org.quartz.impl.jdbcjobstore.JobStoreSupport.executeInNonManagedTXLock(JobStoreSupport.java:3701)
at org.quartz.impl.jdbcjobstore.JobStoreSupport.recoverJobs(JobStoreSupport.java:790)
at org.quartz.impl.jdbcjobstore.JobStoreSupport.schedulerStarted(JobStoreSupport.java:661)
at org.quartz.core.QuartzScheduler.start(QuartzScheduler.java:517)
at org.quartz.impl.StdScheduler.start(StdScheduler.java:143)
at org.springframework.scheduling.quartz.SchedulerFactoryBean$1.run(SchedulerFactoryBean.java:646)

** END NESTED EXCEPTION **

** BEGIN NESTED EXCEPTION **

com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException
MESSAGE: Communication link failure, message from server: "Can't get hostname for your address"

STACKTRACE:

com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Communication link failure, message from server: "Can't get hostname for your address"
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:353)
at com.mysql.jdbc.Util.getInstance(Util.java:336)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:985)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:957)
at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1040)
at com.mysql.jdbc.Connection.createNewIO(Connection.java:2078)
at com.mysql.jdbc.Connection.<init>(Connection.java:716)
at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:46)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:353)
at com.mysql.jdbc.Connection.getInstance(Connection.java:295)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:266)
at java.sql.DriverManager.getConnection(DriverManager.java:582)
at java.sql.DriverManager.getConnection(DriverManager.java:154)
at org.springframework.jdbc.datasource.DriverManagerDataSource.getConnectionFromDriverManager(DriverManagerDataSource.java:174)
at org.springframework.jdbc.datasource.DriverManagerDataSource.getConnectionFromDriver(DriverManagerDataSource.java:165)
at org.springframework.jdbc.datasource.AbstractDriverBasedDataSource.getConnectionFromDriver(AbstractDriverBasedDataSource.java:149)
at org.springframework.jdbc.datasource.AbstractDriverBasedDataSource.getConnection(AbstractDriverBasedDataSource.java:119)
at org.springframework.scheduling.quartz.LocalDataSourceJobStore$2.getConnection(LocalDataSourceJobStore.java:125)
at org.quartz.utils.DBConnectionManager.getConnection(DBConnectionManager.java:108)
at org.quartz.impl.jdbcjobstore.JobStoreCMT.getNonManagedTXConnection(JobStoreCMT.java:162)
at org.quartz.impl.jdbcjobstore.JobStoreSupport.executeInNonManagedTXLock(JobStoreSupport.java:3729)
at org.quartz.impl.jdbcjobstore.JobStoreSupport.executeInNonManagedTXLock(JobStoreSupport.java:3701)
at org.quartz.impl.jdbcjobstore.JobStoreSupport.recoverJobs(JobStoreSupport.java:790)
at org.quartz.impl.jdbcjobstore.JobStoreSupport.schedulerStarted(JobStoreSupport.java:661)
at org.quartz.core.QuartzScheduler.start(QuartzScheduler.java:517)
at org.quartz.impl.StdScheduler.start(StdScheduler.java:143)
at org.springframework.scheduling.quartz.SchedulerFactoryBean$1.run(SchedulerFactoryBean.java:646)

** END NESTED EXCEPTION **

Attempted reconnect 3 times. Giving up.]
at org.quartz.impl.jdbcjobstore.JobStoreCMT.getNonManagedTXConnection(JobStoreCMT.java:165)
at org.quartz.impl.jdbcjobstore.JobStoreSupport.executeInNonManagedTXLock(JobStoreSupport.java:3729)
at org.quartz.impl.jdbcjobstore.JobStoreSupport.executeInNonManagedTXLock(JobStoreSupport.java:3701)
at org.quartz.impl.jdbcjobstore.JobStoreSupport.recoverJobs(JobStoreSupport.java:790)
at org.quartz.impl.jdbcjobstore.JobStoreSupport.schedulerStarted(JobStoreSupport.java:661)
... 3 more
Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Server connection failure during transaction. Due to underlying exception: 'com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Communication link failure, message from server: "Can't get hostname for your address"'.

** BEGIN NESTED EXCEPTION **

com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException
MESSAGE: Communication link failure, message from server: "Can't get hostname for your address"

STACKTRACE:

com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Communication link failure, message from server: "Can't get hostname for your address"
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:353)
at com.mysql.jdbc.Util.getInstance(Util.java:336)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:985)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:957)
at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1040)
at com.mysql.jdbc.Connection.createNewIO(Connection.java:2078)
at com.mysql.jdbc.Connection.<init>(Connection.java:716)
at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:46)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:353)
at com.mysql.jdbc.Connection.getInstance(Connection.java:295)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:266)
at java.sql.DriverManager.getConnection(DriverManager.java:582)
at java.sql.DriverManager.getConnection(DriverManager.java:154)
at org.springframework.jdbc.datasource.DriverManagerDataSource.getConnectionFromDriverManager(DriverManagerDataSource.java:174)
at org.springframework.jdbc.datasource.DriverManagerDataSource.getConnectionFromDriver(DriverManagerDataSource.java:165)
at org.springframework.jdbc.datasource.AbstractDriverBasedDataSource.getConnectionFromDriver(AbstractDriverBasedDataSource.java:149)
at org.springframework.jdbc.datasource.AbstractDriverBasedDataSource.getConnection(AbstractDriverBasedDataSource.java:119)
at org.springframework.scheduling.quartz.LocalDataSourceJobStore$2.getConnection(LocalDataSourceJobStore.java:125)
at org.quartz.utils.DBConnectionManager.getConnection(DBConnectionManager.java:108)
at org.quartz.impl.jdbcjobstore.JobStoreCMT.getNonManagedTXConnection(JobStoreCMT.java:162)
at org.quartz.impl.jdbcjobstore.JobStoreSupport.executeInNonManagedTXLock(JobStoreSupport.java:3729)
at org.quartz.impl.jdbcjobstore.JobStoreSupport.executeInNonManagedTXLock(JobStoreSupport.java:3701)
at org.quartz.impl.jdbcjobstore.JobStoreSupport.recoverJobs(JobStoreSupport.java:790)
at org.quartz.impl.jdbcjobstore.JobStoreSupport.schedulerStarted(JobStoreSupport.java:661)
at org.quartz.core.QuartzScheduler.start(QuartzScheduler.java:517)
at org.quartz.impl.StdScheduler.start(StdScheduler.java:143)
at org.springframework.scheduling.quartz.SchedulerFactoryBean$1.run(SchedulerFactoryBean.java:646)

** END NESTED EXCEPTION **

Attempted reconnect 3 times. Giving up.
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:353)
at com.mysql.jdbc.Util.getInstance(Util.java:336)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:985)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:957)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:927)
at com.mysql.jdbc.Connection.createNewIO(Connection.java:2150)
at com.mysql.jdbc.Connection.<init>(Connection.java:716)
at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:46)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:353)
at com.mysql.jdbc.Connection.getInstance(Connection.java:295)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:266)
at java.sql.DriverManager.getConnection(DriverManager.java:582)
at java.sql.DriverManager.getConnection(DriverManager.java:154)
at org.springframework.jdbc.datasource.DriverManagerDataSource.getConnectionFromDriverManager(DriverManagerDataSource.java:174)
at org.springframework.jdbc.datasource.DriverManagerDataSource.getConnectionFromDriver(DriverManagerDataSource.java:165)
at org.springframework.jdbc.datasource.AbstractDriverBasedDataSource.getConnectionFromDriver(AbstractDriverBasedDataSource.java:149)
at org.springframework.jdbc.datasource.AbstractDriverBasedDataSource.getConnection(AbstractDriverBasedDataSource.java:119)
at org.springframework.scheduling.quartz.LocalDataSourceJobStore$2.getConnection(LocalDataSourceJobStore.java:125)
at org.quartz.utils.DBConnectionManager.getConnection(DBConnectionManager.java:108)
at org.quartz.impl.jdbcjobstore.JobStoreCMT.getNonManagedTXConnection(JobStoreCMT.java:162)
... 7 more

通过在C:\WINDOWS\system32\drivers\etc中hosts文件中添加相关的主机ip即可。

的错误为

ERROR 1130: Host ’192.168.5.3’ is not allowed to connect to this MySQL server

www.2cto.com

查过资料后发现这个问题，一般都会遇到，Mysql数据库跟其他数据库不一样，需要设置权限可以控制哪台机器能访问数据库，能访问哪些表。

所以就要登上服务器。

C:\Documents and Settings\Administrator> mysql -h localhost -u root -p

Enter password: ***

Welcome to the MySQL monitor. Commands end with ; or \g.

Your MySQL connection id is 5

Server version: 5.1.43-community MySQL Community Server (GPL)

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

www.2cto.com

mysql> grant all privileges on *.* to 'root'@'%' identified by '123' with grant

-> option;

Query OK, 0 rows affected (0.00 sec)

意思就是将服务器上的所有资源都给root用户权限，%代表来自不同的IP

这里需要注意一下要把密码也要带上。通过密码123登录。

mysql> FLUSH PRIVILEGES;

Query OK, 0 rows affected (0.00 sec)

最后要刷新下权限。

这样就从本地192.168.5.3这个IP的客户端连接到服务器上了

你可能感兴趣的:(hostname)

Ansible自动化部署kubernetes集群 theo.wu kubernetes ansible 自动化
机器环境介绍1.1.机器信息介绍IPhostnameapplicationCPUMemory192.168.204.129k8s-master01etcd，kube-apiserver，kube-controller-manager，kube-scheduler,kubelet,kube-proxy,containerd2C4G192.168.204.130k8s-worker01etcd，kub
【2023年】云计算金砖牛刀小试 geekgold linux 容器 grafana prometheus ansible kubernetes 云原生
A模块题目OpenStack平台部署与运维任务1私有云平台环境初始化（6分）IP主机名192.168.157.30controller192.168.157.31compute1.配置主机名把controller节点主机名设置为controller,compute节点主机名设置为compute。分别在controller节点和compute节点将hostname命令的返回结果提交到答题框。【0.5
jmeter远程启动配置雪霁_ 性能测试压力测试 jmeter linux
前提条件保持windows端、linux端jdk版本一致配置linux压力机(配置agent)修改文件jmeter.properties，打开注释server_port开启端口(默认1099)；打开注释，修改server.rmi.ssl.disable=false为true运行命令，./jmeter-server-Djava.rmi.server.hostname=10.0.0.48（ip为lin
hadoop 0.22.0 部署笔记 weixin_33701564 大数据 java 运维
为什么80%的码农都做不了架构师？>>>因为需要使用hbase，所以开始对hbase进行学习。hbase是部署在hadoop平台上的NOSql数据库，因此在部署hbase之前需要先部署hadoop。环境：redhat5、hadoop-0.22.0.tar.gz、jdk-6u13-linux-i586.zipip192.168.1.128hostname：localhost.localdomain（
springcloud微服务 - 集成Zuul网关无法通过网关徐先生Paul springcloud微服务 Zuul网关 java 微服务微服务架构 cloud
springcloud微服务-集成Zuul网关无法通过网关今天上午配置了下zuul网关，结果无法通过网关。具体如下：下面先贴下我做的动作。1、application.yml文件：server:port:9004eureka:instance:hostname:127.0.0.1client:service-url:defaultZone:http://${eureka.instance.hostn
Flink - CEP kikiki1
Hadoop3.2集群新版本的搭建详细讲解过程，从下面第一张官方的图来看，最新版是3.2，所以大猪将使用3.2的版本来演示，过程中遇到的坑留给自己，把路留给你们，IT之路还有大猪。大猪为了把文章压缩极简方便小伙伴阅读，将使用root帐号进行所有操作。准备两台主机10.211.55.11、10.211.55.12对应的hostname为m1.example.com、m2.example.com具体命
MySQL8.0.33 主主复制高可用部署努力冲 mysql adb
一、服务器规划1.1服务器详情主机名IP配置备注MySQLMasterVIP10.0.0.10虚拟IP跳转MySQL连接地址MySQLMaster0110.0.0.112H4GMySQLMaster0210.0.0.122H4G1.2修改主机名##修改各主机的主机名如：10.0.0.11服务器[root@localhost~]#hostnamectlset-hostnamemysqlmaster0
cephadm搭建ceph文件集群存储 L__liurs 服务器
一、基础配置1、配置主机名[root@ecs-cd34~]hostnamectlset-hostnamenode1[root@ecs-cd34~]execbash#主机名生效2、配置hosts解析（根据自己的服务器id修改）cat>>/etc/hosts/etc/docker/daemon.json<
SpringBoot+Kafka+ELK 完成海量日志收集（超详细） 2401_83703797 程序员 spring boot kafka elk
SpringBoot项目准备引入log4j2替换SpringBoot默认log，demo项目结构如下：pomIndexController测试Controller，用以打印日志进行调试InputMDC用以获取log中的[%X{hostName}]、[%X{ip}]、[%X{applicationName}]三个字段值NetUtil启动项目，访问/index和/ero接口，可以看到项目中生成了app
【redis】redis shell 详解戒掉贪嗔痴(薛双奇) 数据库运维-Redis redis bootstrap 数据库
1.redisshellredis提供了redis-cli,redis-server,redis-benchmark等shell工具。redis-cli的命令[root@oracle1redis6379]#redis-cli--helpredis-cli4.0.11Usage:redis-cli[OPTIONS][cmd[arg[arg...]]]-hServerhostname(default:
k8s安装test qBeautifulBoy kubernetes 容器云原生
k8s集群部署准备工作三台centos7虚拟机（内存每个节点4G）[root@master~]#cat/etc/redhat-releaseCentOSLinuxrelease7.9.2009(Core)三个机器分别设置主机名hostnamectlset-hostnamemasterhostnamectlset-hostnamenode1hostnamectlset-hostnamenode2三台
使用Ansible-playbook 自建CA，并签发客户端IP证书运维小弟| srebro.cn 运维 ansible 网络 ssl
使用Ansible-playbook自建CA，并签发客户端IP证书需求使用Ansible-playbook来签发客户端IP证书签发单个IP地址，比如脚本中使用{{inventory_hostname}}来获取主机的IP地址作为证书签发地址----name:GenerateandsignclientIPcertificatehosts:nginxbecome:truevars:#CAsettings
1 - Linux网络设置活老鬼 Linux网络服务 linux 网络服务器
目录一、查看网络配置1.ifconfig命令-查看网络接口信息2.hostname命令-查看主机名称3.route命令-查看路由表条目二、查看网络连接情况1.nestat命令2.ss命令3.netstat命令与ss命令的区别4.lsof命令（ListOpenFiles）-列出系统中打开的文件的命令行工具三、测试网络连接1.ping命令-测试网络连通性2.traceroute-跟踪数据包的路由途径3
5 种最常见的 DNS 故障诊断及问题处理方法开源Linux 网络 linux java 分布式 centos
1DNS基础知识互联网基于TCP/IP协议。为了方便管理网络内的主机，整个互联网分为若干个域（domain），每个域又可以再分为若干个子域，例如，.com，.org，.edu都是顶级域，而google.com是.com下面的子域。网络中的任意一台主机（host）都会属于某个域，并且有自己的名字，称为主机名（hostname）。例如example.com就是.com域中一台主机名为example.c
【Linux命令手册】速查、备忘录 Uncle 城 linux 服务器运维计算机网络网络 centos 网络协议
系统信息和性能查看常⽤命令作⽤uname-a查看内核/OS/CPU信息uname-r查看内核版本uname-m查看处理器架构arch查看处理器架构hostname查看计算机名who显示当前登录系统的⽤户whoami显示登录时的⽤户名whoami显示当前⽤户名cat/proc/version查看linux版本信息cat/proc/cpuinfo查看CPU信息cat/proc/interrupts查看
如何查看docker run启动参数命令 DN金猿 docker docker nginx linux
前言有时候我们可能不想再去一个一个查某个docker服务的运行参数，下面介绍的可以直接查看docker中的运行参数dockerrun\--name=nginx105\--hostname=74d35e8f150c\--env=PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin\--env=NGINX_VERSION=1
CentOS8-Stream Yum下载报错企鹅郁金香笔记 linux CentOS-Stream8 yum 安装
CentOS8-StreamYum下载报错报错信息如下CentOSLinux8-AppStream0.0B/s|0BErrorsduringdownloadingmetadataforrepository'appstream':-Curlerror(6):Couldn'tresolvehostnameforhttp://mirrorlist.centos.org/?release=8&arch=x
远程控制中如何修改Linux系统名移动文件进入vim修改文件内容蛋挞小丸子 linux
1.打开Linux系统的命令端口。vim输入hostname查看系统名称2.短暂修改系统名称。输入hostname（名称）然后退出系统输入exit重新登录linux系统再次输入hostname即可查看修改的系统名称3.永久修改系统名称。输入hostnamectlset-hostname(想要的系统名称）重启系统后仍是修改后的名称4.输入hostnamectlstatus查看系统名称如何创建文档和内
修改系统主机名 Yana.com Linux系统运维 linux
方法一：hostnamectlset-hostname命令用于设置主机名。使用方法为：hostnamectlset-hostname[new_hostname]。例如，要将主机名更改为"mycomputer"，可以使用命令hostnamectlset-hostnamemycomputer。执行bash可以立即生效hostnamectlset-hostname命令会自动更新/etc/hostname
Linux网络设置 Amrian_robot linux 网络运维
目录一、查看网络配置1.查看网络接口信息ifconfig1.1查看所以活动的网络接口信息1.2查看指定网络接口信息2.查看主机名称hostname2.1hostname命令2.2永久设置主机名3.查看路由表条目route3.1route命令二、查看网络连接情况1.查看网络连接情况netstat（即端口扫描）2.获取socket统计信息——ss2.1ss命令概述2.2ss选项2.3netstat命令
Openstack 与 Ceph集群搭建(下)： Openstack部署范枝洲系统运维 openstack ceph
文章目录文章参考部署节点准备1.修改Host文件与hostname名称2.安装NTP软件3.网卡配置信息4.开启Docker共享挂载5.安装python虚拟环境6.安装kolla-ansible7.加载AnsiblegalaxyrequirementsOpenstack安装前预配置1.配置密码2.配置multinode文件3.修改全局配置文件Openstack正式安装1.启动bootstrap-s
初识liunx系统这么牛逼的代码我写的 c语言
进行嵌入式开发，依赖的是linux（Linuxisnotunix）系统,主要以终端指令为主linux也有图形化界面，由于嵌入式编程一般只将程序移植到开发板中，无需图形化界课程前期，需要一直使用linux系统，做到从windows向linux的转换放大终端ctrlshift+缩小终端ctrl-清屏ctrlL历史命令上下箭头用户名：hqwhoami主机名：Ubuntuhostname:$中间位置当前路
vagrant 创建虚拟机灰色人生qwer vagrant 运维
创建一个名为“Vagrantfile”的文件，修改如下内容：Vagrant.configure("2")do|config|(1..3).eachdo|i|config.vm.define"k8s-node#{i}"do|node|#设置虚拟机的Boxnode.vm.box="centos/7"#设置虚拟机的主机名node.vm.hostname="k8s-node#{i}"#设置虚拟机的IPno
sqllite连接远程mysql_sqlite数据库如何远程连接? weixin_39747341
sqlite数据库如何远程连接代码如下：QSqlDatabasedb=QSqlDatabase::addDatabase("QSQLITE");db.setHostName("192.168.1.160");//设置你网络服务器的IPdb.setDatabaseName("/share/personnel.db");//share共享目录下的数据库名db.setUserName("PersionS
ubuntu22.04使用kubeadm部署k8s集群闫利朋 kubernetes实践之路 kubernetes 容器云原生 ubuntu
使用kubeadm部署一个k8s集群，1个master+2个worker节点1.环境信息操作系统：ubuntu22.04内存：16GBCPU：4网络：能够互访，能够访问互联网hostnameip备注node0110.121.218.50masternode0210.121.218.49workernode0310.121.218.48worker2.准备工作基础配置：#时间同步sudoapt-yi
Hadoop：HA模式配置与实现家道消乏 Hadoop基础 hadoop 大数据 hdfs
写的不到位的地方，欢迎评论指出不足之处一、检查系统环境1、HostName、Hosts、JDK、SSH、网络、防火墙、数据源二、集群角色分配表注：这只是实例服务器NameNodeNameNodeZookepperFailoverControllerDataNodeZookepperJournalNodeOneyes(NN2和其它节点免密)yesyesTwoyes(NN1和其它节点免密)yesyes
如何查看Squid的DNS缓存 pcj_888 squid squid
使用squidclientmgr:ipcache命令查看Squid的DNS缓存记录如果squid端口不是3128,需要指定端口号,squidclient-p{port}mgr:ipcache#squidclientmgr:ipcache...IPCacheStatistics:...IPCacheContents:HostnameFlglstrefTTLN(b)www.trendmicro.com
python操作服务器 Enougme python
一：使用paramiko进行SSH连接首先确保已安装paramiko库：pipinstallparamiko代码示例在这里插入代码片importparamikohostname='hostname'username='user'password='passwd'client=paramiko.SSHClient()client.set_missing_host_key_policy(paramik
mysql_主从复制打败404 mysql 数据库 linux
1.初始化配置1.关闭防火墙、Selinux2.修改主机名主[root@192~]#hostnamectlset-hostnamemaster从[root@192~]#hostnamectlset-hostnameslave13.配置本地解析都可配置[root@masteretc]#vim/etc/hosts192.168.29.129mysql-master192.168.29.142mysql
linux 修改hostname 岳来 linux &shell linux 运维服务器 hostname host
在Linux系统中修改主机名（hostname）要遵循以下几步全面的操作流程：1.临时修改主机名你可以立即但临时地更改主机名，这个更改在重启后不会保留。执行以下命令：hostname新主机名例如：hostnamemynewhostname2.永久修改主机名（针对当前用户会话）编辑/etc/hostname文件，将文件中原来的主机名替换为新的主机名。这一步是永久修改主机名的核心步骤。使用文本编辑器，
tomcat基础与部署发布暗黑小菠萝 Tomcat java web
从51cto搬家了，以后会更新在这里方便自己查看。做项目一直用tomcat，都是配置到eclipse中使用，这几天有时间整理一下使用心得，有一些自己配置遇到的细节问题。 Tomcat：一个Servlets和JSP页面的容器，以提供网站服务。一、Tomcat安装安装方式：①运行.exe安装包 &n
网站架构发展的过程 ayaoxinchao 数据库应用服务器网站架构
1.初始阶段网站架构：应用程序、数据库、文件等资源在同一个服务器上 2.应用服务和数据服务分离：应用服务器、数据库服务器、文件服务器 3.使用缓存改善网站性能：为应用服务器提供本地缓存，但受限于应用服务器的内存容量，可以使用专门的缓存服务器，提供分布式缓存服务器架构 4.使用应用服务器集群改善网站的并发处理能力：使用负载均衡调度服务器，将来自客户端浏览器的访问请求分发到应用服务器集群中的任何
[信息与安全]数据库的备份问题 comsci 数据库
如果你们建设的信息系统是采用中心-分支的模式,那么这里有一个问题如果你的数据来自中心数据库,那么中心数据库如果出现故障,你的分支机构的数据如何保证安全呢? 是否应该在这种信息系统结构的基础上进行改造,容许分支机构的信息系统也备份一个中心数据库的文件呢? &n
使用maven tomcat plugin插件debug关联源代码商人shang maven debug 查看源码 tomcat-plugin
*首先需要配置好'''maven-tomcat7-plugin'''，参见[[Maven开发Web项目]]的'''Tomcat'''部分。 *配置好后，在[[Eclipse]]中打开'''Debug Configurations'''界面，在'''Maven Build'''项下新建当前工程的调试。在'''Main'''选项卡中点击'''Browse Workspace...'''选择需要开发的
大访问量高并发 oloz 大访问量高并发
大访问量高并发的网站主要压力还是在于数据库的操作上，尽量避免频繁的请求数据库。下面简要列出几点解决方案： 01、优化你的代码和查询语句，合理使用索引 02、使用缓存技术例如memcache、ecache将不经常变化的数据放入缓存之中 03、采用服务器集群、负载均衡分担大访问量高并发压力 04、数据读写分离 05、合理选用框架，合理架构(推荐分布式架构)。
cache 服务器小猪猪08 cache
Cache 即高速缓存.那么cache是怎么样提高系统性能与运行速度呢？是不是在任何情况下用cache都能提高性能？是不是cache用的越多就越好呢？我在近期开发的项目中有所体会，写下来当作总结也希望能跟大家一起探讨探讨，有错误的地方希望大家批评指正。　　1.Cache 是怎么样工作的? 　　Cache 是分配在服务器上
mysql存储过程香水浓 mysql
Description:插入大量测试数据 use xmpl; drop procedure if exists mockup_test_data_sp; create procedure mockup_test_data_sp( in number_of_records int ) begin declare cnt int; declare name varch
CSS的class、id、css文件名的常用命名规则 agevs JavaScript UI 框架 Ajax css
CSS的class、id、css文件名的常用命名规则 (一)常用的CSS命名规则　　头：header 　　内容：content/container 　　尾：footer 　　导航：nav 　　侧栏：sidebar 　　栏目：column 　　页面外围控制整体布局宽度：wrapper 　　左右中：left right
全局数据源 AILIKES java tomcat mysql jdbc JNDI
实验目的：为了研究两个项目同时访问一个全局数据源的时候是创建了一个数据源对象，还是创建了两个数据源对象。 1：将diuid和mysql驱动包（druid-1.0.2.jar和mysql-connector-java-5.1.15.jar）copy至%TOMCAT_HOME%/lib下；2：配置数据源，将JNDI在%TOMCAT_HOME%/conf/context.xml中配置好,格式如下：&l
MYSQL的随机查询的实现方法 baalwolf mysql
MYSQL的随机抽取实现方法。举个例子，要从tablename表中随机提取一条记录，大家一般的写法就是：SELECT * FROM tablename ORDER BY RAND() LIMIT 1。但是，后来我查了一下MYSQL的官方手册，里面针对RAND()的提示大概意思就是，在ORDER BY从句里面不能使用RAND()函数，因为这样会导致数据列被多次扫描。但是在MYSQL 3.23版本中，
JAVA的getBytes()方法 bijian1013 java eclipse unix OS
在Java中，String的getBytes()方法是得到一个操作系统默认的编码格式的字节数组。这个表示在不同OS下，返回的东西不一样！ String.getBytes(String decode)方法会根据指定的decode编码返回某字符串在该编码下的byte数组表示，如： byte[] b_gbk = "
AngularJS中操作Cookies bijian1013 JavaScript AngularJS Cookies
如果你的应用足够大、足够复杂，那么你很快就会遇到这样一咱种情况：你需要在客户端存储一些状态信息，这些状态信息是跨session(会话)的。你可能还记得利用document.cookie接口直接操作纯文本cookie的痛苦经历。幸运的是，这种方式已经一去不复返了，在所有现代浏览器中几乎
[Maven学习笔记五]Maven聚合和继承特性 bit1129 maven
Maven聚合在实际的项目中，一个项目通常会划分为多个模块，为了说明问题，以用户登陆这个小web应用为例。通常一个web应用分为三个模块： 1. 模型和数据持久化层user-core, 2. 业务逻辑层user-service以 3. web展现层user-web， user-service依赖于user-core user-web依赖于user-core和use
【JVM七】JVM知识点总结 bit1129 jvm
1. JVM运行模式 1.1 JVM运行时分为-server和-client两种模式，在32位机器上只有client模式的JVM。通常，64位的JVM默认都是使用server模式，因为server模式的JVM虽然启动慢点，但是，在运行过程，JVM会尽可能的进行优化 1.2 JVM分为三种字节码解释执行方式：mixed mode, interpret mode以及compiler
linux下查看nginx、apache、mysql、php的编译参数 ronin47
在linux平台下的应用，最流行的莫过于nginx、apache、mysql、php几个。而这几个常用的应用，在手工编译完以后，在其他一些情况下（如：新增模块），往往想要查看当初都使用了那些参数进行的编译。这时候就可以利用以下方法查看。 1、nginx [root@361way ~]# /App/nginx/sbin/nginx -V nginx: nginx version: nginx/
unity中运用Resources.Load的方法？ brotherlamp unity视频 unity资料 unity自学 unity unity教程
问：unity中运用Resources.Load的方法？答：Resources.Load是unity本地动态加载资本所用的方法,也即是你想动态加载的时分才用到它,比方枪弹,特效,某些实时替换的图像什么的,主张此文件夹不要放太多东西,在打包的时分,它会独自把里边的一切东西都会集打包到一同,不论里边有没有你用的东西,所以大多数资本应该是自个建文件放置 1、unity实时替换的物体即是依据环境条件
线段树-入门 bylijinnan java 算法线段树
/** * 线段树入门 * 问题：已知线段[2,5] [4,6] [0,7]；求点2,4,7分别出现了多少次 * 以下代码建立的线段树用链表来保存，且树的叶子结点类似[i,i] * * 参考链接：http://hi.baidu.com/semluhiigubbqvq/item/be736a33a8864789f4e4ad18 * @author lijinna
全选与反选 chicony 全选
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <title>全选与反选</title>
vim一些简单记录 chenchao051 vim
mac在/usr/share/vim/vimrc linux在/etc/vimrc 1、问：后退键不能删除数据，不能往后退怎么办？答：在vimrc中加入set backspace=2 2、问：如何控制tab键的缩进？答：在vimrc中加入set tabstop=4 (任何
Sublime Text 快捷键 daizj 快捷键 sublime
[size=large][/size]Sublime Text快捷键：Ctrl+Shift+P：打开命令面板Ctrl+P：搜索项目中的文件Ctrl+G：跳转到第几行Ctrl+W：关闭当前打开文件Ctrl+Shift+W：关闭所有打开文件Ctrl+Shift+V：粘贴并格式化Ctrl+D：选择单词，重复可增加选择下一个相同的单词Ctrl+L：选择行，重复可依次增加选择下一行Ctrl+Shift+L：
php 引用(&)详解 dcj3sjt126com PHP
在PHP 中引用的意思是：不同的名字访问同一个变量内容. 与Ｃ语言中的指针是有差别的．Ｃ语言中的指针里面存储的是变量的内容在内存中存放的地址变量的引用 PHP 的引用允许你用两个变量来指向同一个内容复制代码代码如下: <? $a="ABC"; $b =&$a; echo
SVN中trunk,branches,tags用法详解 dcj3sjt126com SVN
Subversion有一个很标准的目录结构，是这样的。比如项目是proj，svn地址为svn://proj/，那么标准的svn布局是svn://proj/|+-trunk+-branches+-tags这是一个标准的布局，trunk为主开发目录，branches为分支开发目录，tags为tag存档目录（不允许修改）。但是具体这几个目录应该如何使用，svn并没有明确的规范，更多的还是用户自己的习惯。
对软件设计的思考 e200702084 设计模式数据结构算法 ssh 活动
软件设计的宏观与微观软件开发是一种高智商的开发活动。一个优秀的软件设计人员不仅要从宏观上把握软件之间的开发，也要从微观上把握软件之间的开发。宏观上，可以应用面向对象设计，采用流行的SSH架构，采用web层，业务逻辑层，持久层分层架构。采用设计模式提供系统的健壮性和可维护性。微观上，对于一个类，甚至方法的调用，从计算机的角度模拟程序的运行情况。了解内存分配，参数传
同步、异步、阻塞、非阻塞 geeksun 非阻塞
同步、异步、阻塞、非阻塞这几个概念有时有点混淆，在此文试图解释一下。同步：发出方法调用后，当没有返回结果，当前线程会一直在等待（阻塞）状态。场景：打电话，营业厅窗口办业务、B/S架构的http请求-响应模式。异步：方法调用后不立即返回结果，调用结果通过状态、通知或回调通知方法调用者或接收者。异步方法调用后，当前线程不会阻塞，会继续执行其他任务。实现：
Reverse SSH Tunnel 反向打洞實錄 hongtoushizi ssh
實際的操作步驟： # 首先，在客戶那理的機器下指令連回我們自己的 Server，並設定自己 Server 上的 12345 port 會對應到幾器上的 SSH port ssh -NfR 12345:localhost:22 [email protected] # 然後在 myhost 的機器上連自己的 12345 port，就可以連回在客戶那的機器 ssh localhost -p 1
Hibernate中的缓存 Josh_Persistence 一级缓存 Hiberante缓存查询缓存二级缓存
Hibernate中的缓存一、Hiberante中常见的三大缓存：一级缓存，二级缓存和查询缓存。 Hibernate中提供了两级Cache，第一级别的缓存是Session级别的缓存，它是属于事务范围的缓存。这一级别的缓存是由hibernate管理的，一般情况下无需进行干预；第二级别的缓存是SessionFactory级别的缓存，它是属于进程范围或群集范围的缓存。这一级别的缓存
对象关系行为模式之延迟加载 home198979 PHP 架构延迟加载
形象化设计模式实战 HELLO!架构一、概念 Lazy Load：一个对象，它虽然不包含所需要的所有数据，但是知道怎么获取这些数据。延迟加载貌似很简单，就是在数据需要时再从数据库获取，减少数据库的消耗。但这其中还是有不少技巧的。二、实现延迟加载实现Lazy Load主要有四种方法：延迟初始化、虚
xml 验证 pengfeicao521 xml xml解析
有些字符，xml不能识别，用jdom或者dom4j解析的时候就报错 public static void testPattern() { // 含有非法字符的串 String str = "Jamey친Ñ&#1282
div设置半透明效果 spjich css 半透明
为div设置如下样式： div{filter:alpha(Opacity=80);-moz-opacity:0.5;opacity: 0.5;} 说明： 1、filter：对win IE设置半透明滤镜效果，filter:alpha(Opacity=80)代表该对象80%半透明，火狐浏览器不认2、-moz-opaci
你真的了解单例模式么？ w574240966 java 单例设计模式 jvm
单例模式，很多初学者认为单例模式很简单，并且认为自己已经掌握了这种设计模式。但事实上，你真的了解单例模式了么。一，单例模式的5中写法。（回字的四种写法，哈哈。） 1，懒汉式（1）线程不安全的懒汉式 public cla