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ERROR 2003 (HY000): Can't connect to MySQL server

brock — Tue, 08 Oct 2013 02:34:00 GMT

一.问题的提出

/usr/local/webserver/mysql/bin/mysql -u root -h 172.29.141.112 -p -S /tmp/mysql.sock
Enter password:
ERROR 2003 (HY000): Can't connect to MySQL server on '172.29.141.112' (113)

二.问题的分析

出现上述问题，可能有以下几种可能

1. my.cnf 配置文件中 skip-networking 被配置

skip-networking 这个参数，导致所有TCP/IP端口没有被监听,也就是说出了本机，其他客户端都无法用网络连接到本mysql服务器

所以需要把这个参数注释掉。

2.my.cnf配置文件中 bindaddress 的参数配置

bindaddress，有的是bind-address ，这个参数是指定哪些ip地址被配置，使得mysql服务器只回应哪些ip地址的请求，所以需要把这个参数注释掉。

3.防火墙的原因

通过 /etc/init.d/iptables stop 关闭防火墙

我的问题，就是因为这个原因引起的。关闭mysql 服务器的防火墙就可以使用了。

三.问题的解决

1. 如果是上述第一个原因，那么找到 my.cnf ，注释掉 skip-networking 这个参数

sed -i 's%skip-networking%#skip-networking%g' my.cnf

2. 如果是上述第二个原因，那么找到 my.cnf ，注释掉 bind-address 这个参数

sed -i 's%bind-address%#bind-address%g' my.cnf

sed -i 's%bindaddress%#bindaddress%g' my.cnf

最好修改完查看一下，这个参数。

3.如果是上述第三个原因，那么把防火墙关闭，或者进行相应配置

/etc/init.d/iptables stop

四.参考

http://hi.baidu.com/vbkan/blog/item/cd5035030cefee793812bb56.html

http://dev.firnow.com/course/7_databases/mysql/myxl/20090820/169010.html

http://www.dnbcw.com/biancheng/sql/lojz182597.html

brock 2013-10-08 10:34 发表评论

nux和CentOS下网卡启动、配置等ifcfg-eth0教程

brock — Wed, 31 Jul 2013 10:42:00 GMT

步骤1、配置/etc/sysconfig/network-scripts/ifcfg-eth0 里的文件。it动力的CentOS下的ifcfg-eth0的配置详情：

[root@localhost ~]# vim /etc/sysconfig/network-scripts/ifcfg-eth0

DEVICE="eth0"
HWADDR="00:0C:29:FD:FF:2A"
NM_CONTROLLED="yes"
ONBOOT="yes"
IPADDR=192.168.1.31
NETMASK=255.255.255.0
GATEWAY=192.168.1.1
BOOTPROTO=static

前面三行是系统睚带的，后面就是手动添加的。
这样设置扣，记得重启网卡：
[root@localhost ~]# /etc/init.d/network stop
[root@localhost ~]# /etc/init.d/network start

行了，现在就可以PING得通网关了，如果还得上网，不必须设置DNS。设置DNS就详见步骤2

步骤2、修改dns
[root@localhost ~]# vi /etc/resolv.conf
在里面添加二个dns：
nameserver 202.96.134.133
nameserver 8.8.8.8

ok，大攻告成，即可上网了！！！！

brock 2013-07-31 18:42 发表评论

vSphere Web Services SDK 安装

brock — Wed, 31 Jul 2013 10:41:00 GMT

The VMware vSphere Web Services SDK includes all the components necessary to work with the VMware vSphere API, including WSDL files, sample code, and libraries. The vSphere Web Services SDK facilitates development of client applications that target the VMware vSphere API. With the vSphere Web Services SDK, developers can create client applications to manage, monitor, and maintain VMware vSphere components, as deployed on VMware®VMware vSphere®ESX®, ESXi™, and VMware®vCenter™ Server systems.

这是官方对vSphere Web Services SDK的介绍，简单来说就是提供了管理vcenter，ESXi的程序接口，目前支持JAVA和.NET平台，下面以windows 7平台为例，介绍JAVA开发环境的部署过程

一、开发环境准备

1、安装JAVA开发环境 J2SE 1.6 b22

http://www.oracle.com/technetwork/java/javasebusiness/downloads/java-archive-downloads-javase6-419409.html#jdk-6u22-oth-JPR

安装到c:\java下，不要安装到C:\program files下，目录中有空格，执行脚本的时候会报错

2、安装SOAP工具JAX-WS2.1

http://jax-ws.java.net/2.1.1/index.html

双击安装即可

3、下载vSphere Web Services SDK 5.1

http://communities.vmware.com/community/vmtn/developer/downloads

解压到c:\devprojects下

二、开发环境配置

1、设置系统变量

JAVA_HOME=C:\java\jdk1.6.0_22

JAVAHOME=C:\java\jdk1.6.0_22

SDKHOME=C:\devprojects

VMKEYSTORE=C:\VMware-Certs\vmware.keystore（稍后介绍安装过程）

WEBHOME=C:\devprojects\vsphere-ws\java\Axis\lib\wbem.jar

WS_SDK_HOME=C:\devprojects\SDK\vsphere-ws

CLASSPATH=.;%JAVA_HOME%\lib\dt.jar;%JAVA_HOME%\lib\tools.jar;C:\devprojects\SDK\vsphere-ws\java\JAXWS\lib\samples.jar;C:\devprojects\SDK\vsphere-ws\java\JAXWS\lib\vim25.jar(这个变量很重要）

2、服务器认证

2.1、将ESX Server或Vcenter的证书导入本机，ESXi的证书在/etc/vmware/ssl/rui.crt；Vcenter的证书在C:/Documents and Settings/All Users/Application Data/VMware/VMware VitualCenter/SSL/rui.crt

2.2、证书拷贝到本机的C:/VMware-Certs目录下，打开windows7的命令行界面，切换到C:/VMware-Certs目录下，使用jdk的keytool工具导入证书：

keytool -import -file -alias -keystore vmware.keystore

其中certificate-filename为rui.crt,service-name可以为服务器的机器名或IP地址，运行成功后会在C:/VMware-Certs目录下生成vmware.keystore文件。

3、重新编译JAX-WS

如果你的安装的版本不是JDK 1.6 b22或者SOAP不是用 JAX-WS2.1，就需要重新编译

打开CMD，切换到C:\devprojects\SDK\vsphere-ws\java\JAXWS\

运行build.bat

运行成功会出现会出现

Generating stubs from wsdl

Compiling stubs.

...

Done

三、运行简单的客户端脚本以验证安装成功

打开CMD，切换到C:\devprojects\SDK\vsphere-ws\java\JAXWS\

run.bat com.vmware.general.SimpleClient --urlhttps://yourFQDNservername/sdk --username username --password password，如下输出表示配置SDK成功

四、错误调试

1、如果出现找不到类的错误，ClassNotFoundException:........,可以这样

打开CMD，切换到C:\devprojects\SDK\vsphere-ws\java\JAXWS\

java -Djavax.net.ssl.trustStore=%VMKEYSTORE% com.vmware.general.SimpleClient--url https://example.com/sdk --username pubs --password ***

2、如果提示JAVA虚拟机的内存不够，可以这样

java -Djavax.net.ssl.trustStore=%VMKEYSTORE% -Xms 512M -XMx1024M com.vmware.general.SimpleClient--url https://example.com/sdk --username pubs --password ***

brock 2013-07-31 18:41 发表评论

bind+dlz+mysql实现区域记录动态更新

brock — Wed, 31 Jul 2013 10:40:00 GMT

BIND-DLZ实验:http://bind-dlz.sourceforge.net/

实验环境:RHEL4,BIND-9.5.0-P2.tar.gz(9.4.0以上版本都已含DLZ补丁),Mysql-5.0.56.tar.gz

1、安装mysql(先安装gcc等相关软件包)

   #tar zxvf mysql-5.0.56.tar.gz
   #cd mysql-5.0.56
   #./configure --prefix=/usr/local/mysql --localstatedir=/usr/loal/mysql/data --   libexecdir=/usr/local/mysql/lib --disable-shared
   #make
   #make install
   #cd /usr/local/mysql/
   #groupadd -g 1003 mysql
   #useradd -g 1003 mysql
   #chown -R mysql .
   #chgrp -R mysql .
   #chown -R mysql lib
   #./bin/mysql_install_db --user=mysql //以mysql的用户身份安装
   #chown -R root .
   #./bin/mysqld_safe --user=mysql & //在后台启动mysql

# cd /root/mysql-5.0.56
# cp support-files/my-medium.cnf /etc/my.cnf
# cp support-files/mysql.server /etc/rc.d/init.d/mysqld
# chmod 700 !$
# chkconfig --add mysqld
# chkconfig --list mysqld
mysqld 1:off 2:on 3:on 4:on 5:on 6:off
# service mysqld start[restart/reload/stop]
# vi /etc/my.cnf
add this:(防止mysql服务器无查询后8小时自动重连)
wait_timeout = 86400

interactive_timeout = 86400

#/usr/local/mysql/bin/mysqladmin -uroot password 'aptech'
#./bin/mysql -uroot -paptech

#echo "PATH=$PATH:/usr/local/mysql/bin" >> /etc/profile

#. !$

2、安装bind

   #tar zxvf bind-9.5.0-P2.tar.gz
   #cd bind-9.5.0-P2
   #./configure --prefix=/usr/local/bind9 --with-dlz-mysql=/usr/local/mysql --enable-threads=no

//--with-dlz-mysql=/usr/local/mysql 要求bind安装中支持DLZ

//--enable-threads=no 关闭多线程

   //--disable-openssl-version-check 禁止openssl版本的检查
   #make
   #make install

3、创建database,table

create database mydata;

use mydata;

create table other_dns_records(

zone varchar(255),

host varchar(255),

type varchar(255),

data varchar(255),

ttl int(11),

mx_priority varchar(255),

refresh int(11),

retry int(11),

expire int(11),

minimum int(11),

serial bigint(11),

resp_person varchar(255),

primary_ns varchar(255));

create table cnc_dns_records(

host varchar(255),

type varchar(255),

data varchar(255),

ttl int(11),

mx_priority varchar(255),

refresh int(11),

retry int(11),

expire int(11),

minimum int(11),

serial bigint(11),

resp_person varchar(255),

primary_ns varchar(255));

insert other_dns_records(zone,host,type,data,ttl,retry)

values('aaa.com','www','A','192.168.199.2','86400','13');

insert cnc_dns_records(zone,host,type,data,ttl,retry)

values('bbb.com','www','A','192.55.199.199','86400','13');

4、编辑/usr/local/bind9/etc/named.conf

#cd /usr/local/bind9/etc

#../sbin/rndc-confgen -a

#../sbin/rndc-confgen > named.conf

#vi !$ //vi named.conf

#less named.conf

# Use with the following in named.conf, adjusting the allow list as needed:
key "rndc-key" {
        algorithm hmac-md5;
        secret "c4aUV+N7GbOF773V+/LnAA==";
};

controls {
        inet 127.0.0.1 port 953
                allow { 127.0.0.1; } keys { "rndc-key"; };
};
# End of named.conf
options {
directory "/usr/local/bind9/etc/";
pid-file "/usr/local/bind9/var/run/named.pid";
allow-query { any; };
recursion no;
version "gaint-d1";
};
include "/usr/local/bind9/etc/cnc.cl";
include "/usr/local/bind9/etc/other.cl";
view "cnc-user" {
match-clients { cnc; };
dlz "Mysql zone" {
database "mysql
{host=localhost dbname=mydata ssl=false port=3306 user=root pass=aptech}
{select zone from cnc_dns_records where zone = '%zone%'}
{select ttl, type, mx_priority, case when lower(type)='txt' then concat('/"', data,
'/"')
when lower(type) = 'soa' then concat_ws('
', data, resp_person, serial, refresh, retry, expire, minimum) else data end as mydata from
cnc_dns_records where zone = '%zone%' and host = '%record%'}";
};
};
view "other-user" {
match-clients { other; };
dlz "Mysql zone" {
database "mysql
{host=localhost dbname=mydata ssl=false port=3306 user=root pass=aptech}
{select zone from other_dns_records where zone='%zone%'}
{select ttl, type, mx_priority, case when lower(type) = 'txt' then concat('/"', data,
'/"')
when lower(type)='soa' then concat_ws('
', data, resp_person, serial, refresh, retry, expire, minimum) else data end as mydata from
other_dns_records where zone = '%zone%' and host = '%record%'}";
};
};
[root@dlz etc]# less cnc.cl
acl "cnc"{
192.168.9.0/24;
};

[root@dlz etc]# less other.cl
acl "other" {
127.0.0.0/18;
};

5、启动&测试

[root@dlz ~]# /usr/local/bind9/sbin/named -gc /usr/local/bind9/etc/named.conf
06-Mar-2009 22:23:02.569 starting BIND 9.5.0-P2 -gc /usr/local/bind9/etc/named.conf
06-Mar-2009 22:23:02.579 loading configuration from '/usr/local/bind9/etc/named.conf'
06-Mar-2009 22:23:02.583 listening on IPv4 interface lo, 127.0.0.1#53
06-Mar-2009 22:23:02.586 listening on IPv4 interface eth0, 192.168.1.5#53
06-Mar-2009 22:23:02.588 Loading 'Mysql zone' using driver mysql
06-Mar-2009 22:23:02.604 default max-cache-size (33554432) applies: view cnc-user
06-Mar-2009 22:23:02.609 Loading 'Mysql zone' using driver mysql
06-Mar-2009 22:23:02.612 default max-cache-size (33554432) applies: view other-user
06-Mar-2009 22:23:02.616 default max-cache-size (33554432) applies: view _bind
06-Mar-2009 22:23:02.621 command channel listening on 127.0.0.1#953
06-Mar-2009 22:23:02.621 ignoring config file logging statement due to -g option
06-Mar-2009 22:23:02.623 running

brock 2013-07-31 18:40 发表评论