WebLogic 实用技巧 01 — Active GridLink 数据源配置指南

作者：金辉 (Orace)

2015 年 12 月 21 日发布

总体架构

1. 确认环境

由于版本上的差异，DNS 服务器、RAC 数据库环境在配置上略有不同，本文仅作参考，不作为任何技术承诺。

搭建 Oracle 11g RAC；

搭建 DNS 服务器，并配置；

确保使用 WebLogic 11g 或 12c。我使用的是 WebLogic 12c。

2. 搭建Oracle RAC环境

参考《OracleVirtualBox 中安装 Oracle Linux6.1 和 11gR2(11.0.2.3) RAC》

3. 搭建 DNS 服务器，配置 RAC 的 SCAN

3.1 安装 DNS 服务器包

我的 DNS 服务器主机是 Oracle Linux 6.1 X86—64，安装 bind 包。

rpm -Uvh bind-9.7.3-2.el6.x86_64.rpm

rpm -Uvh bind-chroot-9.7.3-2.el6.x86_64.rpm

rpm -Uvh bind-libs-9.7.3-2.el6.x86_64.rpm

rpm -Uvh bind-utils-9.7.3-2.el6.x86_64.rpm

3.2 配置/etc/named.conf

// Provided by Red Hat bind package to configure the ISC BIND named(8) DNS

// server as a caching only nameserver (as a localhost DNS resolver only).

//

// See /usr/share/doc/bind*/sample/ for example named configuration files.

//

options {

listen-on port 53 { 127.0.0.1; 192.168.1.201;};

listen-on-v6 port 53 { ::1; };

directory "/var/named";

dump-file "/var/named/data/cache_dump.db";

statistics-file "/var/named/data/named_stats.txt";

memstatistics-file "/var/named/data/named_mem_stats.txt";

allow-query { localhost; };

recursion yes;

dnssec-enable yes;

dnssec-validation yes;

dnssec-lookaside auto;

/* Path to ISC DLV key */

bindkeys-file "/etc/named.iscdlv.key";

};

logging {

channel default_debug {

file "data/named.run";

severity dynamic;

};

};

zone "." IN {

type hint;

file "named.ca";

};

zone "localdomain." IN {

type master;

file "localdomain.zone";

allow-update { none; };

};

zone "1.168.192.in-addr.arpa." IN {

type master;

file "1.168.192.in-addr.arpa";

allow-update { none; };

};

include "/etc/named.rfc1912.zones";

192.168.1.201：是我 DNS 服务器的主机 IP。

1.168.192.in-addr.arpa：是 RAC 的 Public 地址的网段，也是 scan ip 地址的网段

3.3 配置 /var/named/localdomain.zone

$TTL 86400

@ IN SOA localhost root.localhost (

42 ; serial (d. adams)

3H ; refresh

15M ; retry

1W ; expiry

1D ) ; minimum

IN NS localhost

localhost IN A 127.0.0.1

rac1 IN A 192.168.1.111

rac2 IN A 192.168.1.112

rac1-priv IN A 192.168.2.111

rac2-priv IN A 192.168.2.112

rac1-vip IN A 192.168.1.113

rac2-vip IN A 192.168.1.114

ol6-112-scan IN A 192.168.1.115

ol6-112-scan IN A 192.168.1.116

ol6-112-scan IN A 192.168.1.117

各地址应与《OracleVirtualBox 中安装 Oracle Linux6.1 和 11gR2(11.0.2.3) RAC》中的配置一致。

3.4 配置 /var/named/1.168.192.in-addr.arpa

$ORIGIN 1.168.192.in-addr.arpa.

$TTL 1H

@ IN SOA dns.localdomain. root.dns.localdomain. ( 2

3H

1H

1W

1H )

1.168.192.in-addr.arpa. IN NS dns.localdomain.

101 IN PTR rac1.localdomain.

102 IN PTR rac2.localdomain.

111 IN PTR rac1-vip.localdomain.

112 IN PTR rac2-vip.localdomain.

121 IN PTR ol6-112-scan.localdomain.

122 IN PTR ol6-112-scan.localdomain.

123 IN PTR ol6-112-scan.localdomain.

dns.localdomain：是我的主机名

3.5 启动 DNS 服务器

# service named start

3.6 编辑域名搜索文件 /etc/resolv.conf

# Generated by NetworkManager

search localdomain

nameserver 192.168.1.201

192.168.1.201：是我本机地址，也是 DNS 服务器地址

3.7 测试 DNS 中的 SCAN 名

[root@dns named]# ping ol6-112-scan.localdomain

PING ol6-112-scan.localdomain (192.168.1.116) 56(84) bytes of data.

64 bytes from 192.168.1.116: icmp_seq=1 ttl=64 time=1.15 ms

64 bytes from 192.168.1.116: icmp_seq=2 ttl=64 time=0.214 ms

64 bytes from 192.168.1.116: icmp_seq=3 ttl=64 time=0.251 ms

^C

--- ol6-112-scan.localdomain ping statistics ---

3 packets transmitted, 3 received, 0% packet loss, time 2419ms

rtt min/avg/max/mdev = 0.214/0.539/1.153/0.434 ms

[root@dns named]# ping ol6-112-scan.localdomain

PING ol6-112-scan.localdomain (192.168.1.115) 56(84) bytes of data.

64 bytes from 192.168.1.115: icmp_seq=1 ttl=64 time=0.535 ms

64 bytes from 192.168.1.115: icmp_seq=2 ttl=64 time=0.219 ms

64 bytes from 192.168.1.115: icmp_seq=3 ttl=64 time=0.246 ms

^C

--- ol6-112-scan.localdomain ping statistics ---

3 packets transmitted, 3 received, 0% packet loss, time 2211ms

rtt min/avg/max/mdev = 0.219/0.333/0.535/0.143 ms

[root@dns named]# ping ol6-112-scan.localdomain

PING ol6-112-scan.localdomain (192.168.1.117) 56(84) bytes of data.

64 bytes from 192.168.1.117: icmp_seq=1 ttl=64 time=0.500 ms

64 bytes from 192.168.1.117: icmp_seq=2 ttl=64 time=0.253 ms

64 bytes from 192.168.1.117: icmp_seq=3 ttl=64 time=0.232 ms

^C

--- ol6-112-scan.localdomain ping statistics ---

3 packets transmitted, 3 received, 0% packet loss, time 2337ms

rtt min/avg/max/mdev = 0.232/0.328/0.500/0.122 ms

[root@dns named]# nslookup ol6-112-scan.localdomain

Server: 192.168.1.201

Address: 192.168.1.201#53

Name: ol6-112-scan.localdomain

Address: 192.168.1.116

Name: ol6-112-scan.localdomain

Address: 192.168.1.117

Name: ol6-112-scan.localdomain

Address: 192.168.1.115