php – Zabbix无法连接到PostgreSQL数据库

我已将以下RPM安装到我的Zabbix机器上(主机名为zbx-hostname)：

zabbix-java-gateway-2.2.4-1.el6.x86_64
zabbix-web-2.2.4-1.el6.noarch
zabbix-agent-2.2.4-1.el6.x86_64
zabbix-server-2.2.4-1.el6.x86_64
zabbix-2.2.4-1.el6.x86_64
zabbix-web-pgsql-2.2.4-1.el6.noarch
zabbix-server-pgsql-2.2.4-1.el6.x86_64

我的PostgreSQL机器安装了带有RPMS的postgreSQL 9.2(主机名将是db-hostname)：

postgresql92-9.2.8-1PGDG.rhel6.x86_64
postgresql92-libs-9.2.8-1PGDG.rhel6.x86_64
postgresql92-server-9.2.8-1PGDG.rhel6.x86_64

我的zabbix_server.conf文件如下所示：

LogFile=/var/log/zabbix/zabbix_server.log
LogFileSize=0
PidFile=/var/run/zabbix/zabbix_server.pid
DBHost=db-hostname
DBName=zabbix-dbname
DBUser=zabbix-user
DBPassword=zabbix-password
DBSocket=
DBPort=5432

我的zabbix php配置如下：

$DB['TYPE']     = 'POSTGRESQL';
$DB['SERVER']   = 'db-hostname';
$DB['PORT']     = '5432';
$DB['DATABASE'] = 'zabbix-dbname';
$DB['USER']     = 'zabbix-user';
$DB['PASSWORD'] = 'zabbix-password';

// SCHEMA is relevant only for IBM_DB2 database
$DB['SCHEMA'] = '';

$ZBX_SERVER      = 'localhost';
$ZBX_SERVER_PORT = '10051';
$ZBX_SERVER_NAME = '';

$IMAGE_FORMAT_DEFAULT = IMAGE_FORMAT_PNG;
?>

我能够运行以下内容并成功连接到我的数据库：

export PGPASSWORD=zabbix; psql -U zabbix-user -d zabbix-dbname -h db-hostname
export PGPASSWORD=zabbix; psql -U zabbix-user -d zabbix-dbname -h 192.168.0.1

但zabbix拒绝连接打印输出(192.168.0.1是正确解析的IP地址)：

25015:20150205:112656.236 [Z3001] connection to database 'zabbix-dbname' failed: [0] could not connect to server: Permission denied
    Is the server running on host "db-hostname" (192.168.0.1) and accepting
    TCP/IP connections on port 5432?

25015:20150205:112656.236 Database is down. Reconnecting in 10 seconds.

但是在我监控TCP流量的数据库主机上,我没有看到任何传入连接(同时使用tcpdump和iptables).看来zabbix甚至没有尝试向数据库框发出请求？

我已经删除了我的zabbix框并重新启用它以获得相同的错误两次,所以它似乎是我的配置问题,有人知道任何解决方案吗？