实是一个老话题了,很多同行已经讨论q个问题很多?
一直关注我的朋友会记得,在Ext 正火的时?我推Z一个以Ext portal为基,整合struts,spirng,hibernate的开源项?很多朋友下蝲,配置,q行了这个项?q过各种方式ext的用进行了沟?
怎么说呢?写完W一个不完整的FaceYe ext版本?我自己心里多多少有些无?虽然说FaceYe做成了可配置的类似portall构,但是使用ext做出的portletȝ正的portletq是有很大距ȝ.
而最大问?我觉得不在这?我们知?Ext本n已经很臃肿了,使用Ext写东?很少会直接去写Html,作ؓ我来?大多工作是通过直接与js脚本来做?g正应了很多朋友热忠的one application one pae,实,FaceYe可以说在用户界面上做Cq一?同时面的布局可以随意改变,面上的模块可以随意d,比如从最初的RSS模块,到后来的围绕RSS的订阅等服务, 以ؓ博客{?都可以随意的ȝ?.q个q程,我所写的所有html代码,除了header里面加蝲q来的css/js?留下?几乎只有I空的body?
一个朋友看了以???面上的东西怎么出来?
可能很多朋友也会q么?随着我l向下开?功能来多,要加载的东西也越来越多的时?我设计了另外一个功?把所有要加蝲?js路径写入数据,当需要加载的时?再根据\径去加蝲指定的js,到后?我自q至都分不清哪一个js对应哪一个功能模块了.虽然js有说?有注?但有时候我真的要去select数据库了.虽说用大量jsp来完成类似的功能或许也会出现q样的问?但我觉得,混ؕ,在大量用js,使用return nullq样的action的时?使乱更加׃.
使用Ext带ؓ的另外一个问?是页面是只留下空I如也的body?而这不是googleq样的搜索引擎喜Ƣ的,而我们用Ext做的站点,也很难被搜烦引擎收录,做seo,也不Ҏ.看到q一个朋友用Ext做的|站,从用Ext的角度来?真的是下了很大功?可seo,真的很艰?
所以随着开发的不断深入,我发?不能l箋使用Extq行所有的开发了,臛_,不能大量使用Extq行互联|应用的开发了.
ȝ原因
1.Ext体积太大(没用GZIP过153K)
2.大量使用Ext不利于网站做SEO.Ext的各Upanel,包括Tab,Grid,Win,Form{等,生成h很简?大多只需要几句代码就可以?可以不用一句html,可以生成出来一个漂亮的布局.虽然工作量少?面看上L亮了,可搜索引擎也发现不了|站?得不失.
3.兼容.Ext虽然在兼Ҏ方面花了很大功?但在某些时?q是会偶展现出来一个意想不到的l果,令h渧笑皆非.
4.调试.虽然我们有很多调试工具可以?但有时?真的不知道是哪里Z问题,新来开发的,更是一愁莫?
所以到了后?我开始寻扑֏外一U更为简单的式式来开发了.那就是jQuery.jQuery没有像Ext那里,提供一切你惌?个h觉得 ,jQuery更专注于化最基础的开发工?所以用v?也就感觉更像是用原始的jsq行开发一?而页面上的htmll构,跟没使用jQuery以前,没有太大差别?q对于网站开发来?我觉得是一件好事情.
从用Extq行FaceYe的开?到后来感觉到q,试用YUI,再到选择jQueryq行实际的工?一路走?感觉,真的是爱恨交?Ext化了很多工作,让开发更z?更方?但也带来了很多麻?l我们留下了更小的选择I间,YUI跟Ext,虽说不像Ext一?但用v?到处是Ext的媄?g像一个刚刚分手的恋h一?使用h,太多无奈.直到开始用jQuery,才感?又有了当初跨入IT行业的激?
M一句话,如果你做WEB,别用Ext,如果你做大的目,或是压力较大的项?最好别全部使用Ext.如果你的目人员不稳?只是极少Ch懂Ext,别用Ext.
]]>
从大c里我们认识了石?nbsp;
从火腉K我们认识了敌敌畏
从咸鸭蛋、G椒酱里我们认识了苏丹U?nbsp;
从火锅里我们认识了福马?nbsp;
从银耟뀁蜜枣里我们认识了硫?nbsp;
从木耳中认识了硫酔R
今天三鹿又让同胞知道了三聚氰胺的化学作用
外国人喝牛奶l实?nbsp;
中国人喝牛奶l石?nbsp;
日本人口P一天一杯牛奶振兴一个民?nbsp;
中国人口P一天一杯牛Ӟ震惊一个民?nbsp;
伊利Q蒙牛最惛_三鹿说什?nbsp;
伊利Q你他妈加就加了Q不能少加点Q?nbsp;
蒙牛Q我从来都是奶粉里加三聚氰胺Q你他妈三聚氰胺里加奶粉Q?nbsp;
三鹿Q委屈）Q那几天漏斗坏了Q没他妈控制住量Q?br />
q食品安全，看来真的是一大问题，大伙qx多注意了~大伙n体健店?/p>
没事Q明个新闻采访还会亲切的叫，鹏Q谈谈你在神七上的感受~~Q?br />
那也是跟偶在说话啦~
据公开资料Q这ơ会有飞行员Zq行太空行走的安排，同时Q飞行员q要释放卫星，q下可好了，能放出去Q就能收q来Q哪天咱一不高_发艘飞船上去Q把老美的曲球啊什么的Q全收进来，带回来给咱儿子当皮球玩~
那叫个爽~
不扯蛋了Q祝七成功Q祝飞行员安全?br />
]]>
声明Q本文系JavaEye|站发布的原创博客文章，未经作者书面许可，严禁M|站转蝲本文Q否则必追I法律责任！
在Windowspȝ中安装SNMP代理
在Windows XP/2000/2003上安装SNMP代理
在Windows NT上安装SNMP代理
在Linux上安装SNMP代理
在Solaris上安装SNMP代理
----------------------------------------------------------------------------------------------------------------------------------------------
在计机上安装简单网l管理协?SNMP)服务之前Q您最好了解以下信息：
|络中的共同体名U?
每个共同体的陷阱目标?
SNMP理L的IP地址和计机名称?
----------------------------------------------------------------------------------------------------------------------------------------------
在Windows XP/2000/2003上安装SNMP代理
在Windows XP, 2000?003上安装SNMPQ按照下面的步骤Q?
您必MZ名管理员或管理员组中的成员dQ来完成q些步骤。如果您的计机q接C个网l上Q网l条规设|可能会L您完成这些步骤?
点击开始，指向讄Q点L刉? 双击d或删除程? 然后点击d/删除Windowslg?
点击理和监视工?但不要选择或清除其复选框), 然后点击详细信息?
选择单网l管理协议复选框Qƈ点击定?
点击下一步?
h入相应的CD 或指定文件存储位|的完整路径Q然后点ȝl?
SNMP会在安装后自动启动?
q样完成安装过E。如何配|SNMP代理使之应答SNMPhQ可参见配置SNMP代理?
----------------------------------------------------------------------------------------------------------------------------------------------
在Windows NT安装SNMP代理
在Windows NT上安装SNMPQ按照下面的步骤Q?
右键点击桌面上的|上d图标?
点击属性?
点击服务?
点击dQ将出现选择|络服务对话框?
在网l服务列表中点击SNMP服务Q然后点ȝ定?
插入相应的CD 或指定文件存储位|的完整路径Q然后点ȝl?
在您的计机上复制必要的文g后，出现Microsoft SNMP属性对话框?
q样完成安装过E。如何配|SNMP代理使之应答SNMPhQ可参配|SNMP代理?
----------------------------------------------------------------------------------------------------------------------------------------------
在Linux上面pȝ安装SNMP代理
仅有8.0以前的Linux版本才需要安装SNMP的新版本?
使用以下URL可以下蝲最新的SNMP rpm版本Q?
http://prdownloads.sourceforge.net/net-snmp/net-snmp-5.1.1-1.rh9.i686.rpm?download
使用以下URL可以下蝲最新的SNMP zip版本:
http://heanet.dl.sourceforge.net/sourceforge/net-snmp/ucd-snmp-4.2.6.tar.gz
安装rpm版本的步骤如下：
?root"d?
安装最新版的net-snmp之前Q需要卸载机器上的旧的net-snmp。要列出机器上已l安装的 net-snmp的版本，可用以下命?
rpm -qa | grep "net-snmp"
如果机器上已l安装了旧版本，可用以下命令卸?
rpm -e <使用上述命o列出的net-snmp的版本号> --nodeps
如果机器上没有安装先前的版本Q则使用以下命o安装新版本：
rpm -i <C载的SNMP代理> --nodeps
安装zip版本的步骤如?
使用以下命o解冻文gQ?
tar -zxvf ucd-snmp-4.2.6.tar.gz
安装SNMP的步骤如下：
用root用户d?
执行以下命o来设|C~译器的路径Q?
export PATH=<gcc path>:$PATH
从提取ucd-snmp的目录中执行以下四项命oQ?
./configure --prefix=<directory_name> --with-mib-modules="host"
directory_name 是安装SNMP代理的目录?最好选择一?root下的目录。目?usr?local可能包含SNMP旧版本的文gQ所以不要选择q些目录以确保正安装?
make
umask 022
make install
q样完成安装过E。如何配|SNMP代理使之应答SNMPhQ可参见配置SNMP代理?
----------------------------------------------------------------------------------------------------------------------------------------------
在Solarispȝ中安装SNMP代理
请用以下URL来下载SNMP的最新版本：
http://heanet.dl.sourceforge.net/sourceforge/net-snmp/ucd-snmp-4.2.6.tar.gz
使用以下命o解压文gQ?
tar -zxvf ucd-snmp-4.2.6.tar.gz
安装SNMP的操作步骤如下：
用root用户d?
执行以下命o来设|C~译器的路径Q?
export PATH=<gcc path>:$PATH
从提取ucd-snmp的目录中执行以下四项命oQ?
./configure --prefix=<directory_name> --with-mib-modules="host"
directory_name 是安装 SNMP 代理的目录?最好选择安装在根目录/root下。目?usr?local 可能包含SNMP旧版本的文gQ所以不要选择q些目录以确保正安装?
make
umask 022
make install
注意Q?要安装Solaris 8Q参照下面的步骤Q?
netsnmp-5.1.1包在下面的url有效 ftp://ftp.sunfreeware.com/pub/freeware/sparc/8/netsnmp-5.1.1-sol8-sparc-local.gz. q个包是专门用于solaris8?
gunzip etsnmp-5.1.1-sol8-sparc-local.gz.
pkgadd -d netsnmp-5.1.1-sol8-sparc-local.
包就被安装成功。这个包可以通过" ./configure --with-mib-modules=host "配置Q代理将支持host -resource-mib?
启动netsnmp代理Q执?- # /usr/local/sbin/snmpd.
停止q个q程Q执?- # pkill -9 -x -u 0 snmpd.
q样完成了安装q程。配|SNMP代理使其相应SNMPQ请参考配|SNMP代理?
已有 0 人发表留aQ猛?>>q里<<-参与讨论
JavaEye推荐
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声明Q本文系JavaEye|站发布的原创博客文章，未经作者书面许可，严禁M|站转蝲本文Q否则必追I法律责任！
Java代码
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.StringTokenizer;
/**
* 取得linuxpȝ下的cpu、内存信?nbsp;
*
* */
public final class LinuxSystemTool
{
/**
* get memory by used info
*
* @return int[] result
* result.length==4;int[0]=MemTotal;int[1]=MemFree;int[2]=SwapTotal;int[3]=SwapFree;
* @throws IOException
* @throws InterruptedException
*/
public static int[] getMemInfo() throws IOException, InterruptedException
{
File file = new File("/proc/meminfo");
BufferedReader br = new BufferedReader(new InputStreamReader(
new FileInputStream(file)));
int[] result = new int[4];
String str = null;
StringTokenizer token = null;
while((str = br.readLine()) != null)
{
token = new StringTokenizer(str);
if(!token.hasMoreTokens())
continue;
str = token.nextToken();
if(!token.hasMoreTokens())
continue;
if(str.equalsIgnoreCase("MemTotal:"))
result[0] = Integer.parseInt(token.nextToken());
else if(str.equalsIgnoreCase("MemFree:"))
result[1] = Integer.parseInt(token.nextToken());
else if(str.equalsIgnoreCase("SwapTotal:"))
result[2] = Integer.parseInt(token.nextToken());
else if(str.equalsIgnoreCase("SwapFree:"))
result[3] = Integer.parseInt(token.nextToken());
}
return result;
}
/**
* get memory by used info
*
* @return float efficiency
* @throws IOException
* @throws InterruptedException
*/
public static float getCpuInfo() throws IOException, InterruptedException
{
File file = new File("/proc/stat");
BufferedReader br = new BufferedReader(new InputStreamReader(
new FileInputStream(file)));
StringTokenizer token = new StringTokenizer(br.readLine());
token.nextToken();
int user1 = Integer.parseInt(token.nextToken());
int nice1 = Integer.parseInt(token.nextToken());
int sys1 = Integer.parseInt(token.nextToken());
int idle1 = Integer.parseInt(token.nextToken());
Thread.sleep(1000);
br = new BufferedReader(
new InputStreamReader(new FileInputStream(file)));
token = new StringTokenizer(br.readLine());
token.nextToken();
int user2 = Integer.parseInt(token.nextToken());
int nice2 = Integer.parseInt(token.nextToken());
int sys2 = Integer.parseInt(token.nextToken());
int idle2 = Integer.parseInt(token.nextToken());
return (float)((user2 + sys2 + nice2) - (user1 + sys1 + nice1)) / (float)((user2 + nice2 + sys2 + idle2) - (user1 + nice1 + sys1 + idle1));
}
}
/**
* 试c?nbsp;
*
* <p>@author javer QQ:84831612</p>
* @date 2005
*/
public class JaverTest
{
public static void main(String[] args) throws Exception
{
int[] memInfo = LinuxSystemTool.getMemInfo();
System.out.println("MemTotalQ? + memInfo[0]);
System.out.println("MemFreeQ? + memInfo[1]);
System.out.println("SwapTotalQ? + memInfo[2]);
System.out.println("SwapFreeQ? + memInfo[3]);
System.out.println("CPU利用率：" + LinuxSystemTool.getCpuInfo());
}
}
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.StringTokenizer;
/**
* 取得linuxpȝ下的cpu、内存信?
*
* */
public final class LinuxSystemTool
{
/**
* get memory by used info
*
* @return int[] result
* result.length==4;int[0]=MemTotal;int[1]=MemFree;int[2]=SwapTotal;int[3]=SwapFree;
* @throws IOException
* @throws InterruptedException
*/
public static int[] getMemInfo() throws IOException, InterruptedException
{
File file = new File("/proc/meminfo");
BufferedReader br = new BufferedReader(new InputStreamReader(
new FileInputStream(file)));
int[] result = new int[4];
String str = null;
StringTokenizer token = null;
while((str = br.readLine()) != null)
{
token = new StringTokenizer(str);
if(!token.hasMoreTokens())
continue;
str = token.nextToken();
if(!token.hasMoreTokens())
continue;
if(str.equalsIgnoreCase("MemTotal:"))
result[0] = Integer.parseInt(token.nextToken());
else if(str.equalsIgnoreCase("MemFree:"))
result[1] = Integer.parseInt(token.nextToken());
else if(str.equalsIgnoreCase("SwapTotal:"))
result[2] = Integer.parseInt(token.nextToken());
else if(str.equalsIgnoreCase("SwapFree:"))
result[3] = Integer.parseInt(token.nextToken());
}
return result;
}
/**
* get memory by used info
*
* @return float efficiency
* @throws IOException
* @throws InterruptedException
*/
public static float getCpuInfo() throws IOException, InterruptedException
{
File file = new File("/proc/stat");
BufferedReader br = new BufferedReader(new InputStreamReader(
new FileInputStream(file)));
StringTokenizer token = new StringTokenizer(br.readLine());
token.nextToken();
int user1 = Integer.parseInt(token.nextToken());
int nice1 = Integer.parseInt(token.nextToken());
int sys1 = Integer.parseInt(token.nextToken());
int idle1 = Integer.parseInt(token.nextToken());
Thread.sleep(1000);
br = new BufferedReader(
new InputStreamReader(new FileInputStream(file)));
token = new StringTokenizer(br.readLine());
token.nextToken();
int user2 = Integer.parseInt(token.nextToken());
int nice2 = Integer.parseInt(token.nextToken());
int sys2 = Integer.parseInt(token.nextToken());
int idle2 = Integer.parseInt(token.nextToken());
return (float)((user2 + sys2 + nice2) - (user1 + sys1 + nice1)) / (float)((user2 + nice2 + sys2 + idle2) - (user1 + nice1 + sys1 + idle1));
}
}
/**
* 试c?
*
* <p>@author javer QQ:84831612</p>
* @date 2005
*/
public class JaverTest
{
public static void main(String[] args) throws Exception
{
int[] memInfo = LinuxSystemTool.getMemInfo();
System.out.println("MemTotalQ? + memInfo[0]);
System.out.println("MemFreeQ? + memInfo[1]);
System.out.println("SwapTotalQ? + memInfo[2]);
System.out.println("SwapFreeQ? + memInfo[3]);
System.out.println("CPU利用率：" + LinuxSystemTool.getCpuInfo());
}
} Qhttp://people.ee.ethz.ch/~oetiker/webtools/mrtg/Q就是一个很不错的选择。不q用mrtgp装sysstat、apache、snmp、perl之类的东ѝ而且安装也要好几个步骤，g比较ȝ。本来也想直接调用sar、vmstat之类的命令，parse一下结果就了。哪知道发现不同的版本的linuxq些命o的结果也都是不一栗既然要按版?parse它们的结果，那还不如直接ȝl里面获得算了。于是研I了一下sysstatQhttp://freshmeat.net/projects/sysstat/Q和gkrellmQhttp://gkrellm.net Q的源代码，扑ֈ监测性能的数据所在?
1、CPU
在文?/proc/stat"里面包含了CPU的信息。每一个CPU的每一tick用在什么地斚w在这个文仉面记着。后面的数字含义分别是： user、nice、sys、idle、iowait。有些版本的kernel没有iowaitq一V这些数DCZ开机到现在QCPU的每tick用在了哪里。例如：
cpu0 256279030 0 11832528 1637168262
是cpu0从开机到现在?256279030 tick用在了user消耗，11832528用在了sys消耗。所以如果想计算单位旉Q例?sQ里面CPU的负载，那只需要计?U前后数值的差除以每一U的tick数量可以了。gkrellm是q样实现的：((200 * (v2 - v1) / CPU_TICKS_PER_SECOND) + 1) /2
例如Q第一ơ读?proc/statQuser的值是256279030Q一U以后再Mơ，值是256289030Q那么CPU在这一U的user消耗就是：((200 * (256289030 - 256279030) / CPU_TICKS_PER_SECOND) + 1) /2 = ((10000 * 200 / 1000000) + 1) / 2 = 1%了?
2、内存消?
文g"/proc/meminfo"里面包含的就是内存的信息Q还包括了swap的信息。例如：
$ cat /proc/meminfo
total: used: free: shared: buffers: cached:
Mem: 1057009664 851668992 205340672 0 67616768 367820800
Swap: 2146787328 164429824 1982357504
MemTotal: 1032236 kB
MemFree: 200528 kB
MemShared: 0 kB
…?
不过从gkrellm的源代码看，有些版本没有前面那两行统计的信息Q只能够Ҏ下面的Key: Valueq种各式的数据收集?
3、磁盘空?
从gkrellm的源代码看，q个是一个很复杂的数据。磁盘分区的数据有可能分布在Q?proc/mounts?proc/diskstats?/proc/partitions{等。而且如果惌查某几个特定的\径，q需要通过mount、df{命令的帮助。ؓ了减麻烦，q个数据我就直接?statfs函数直接获得了?
int statfs(const char *path, struct statfs *buf);
q个函数只需要输入需要检查的路径名称Q就可以q回q个路径所在的分区的空间用情况：
ȝ_buf.f_bsize * buf.f_blocks
IZI间Qbuf.f_bsize * buf.f_bavail
4、磁盘I/O
盘I/O的数据也同样比较复杂Q有些版本看/proc/diskstatsQ有些版本看/proc/partitionsQ还有些版本至今我也不知道在那里看……不q可以看到数据的版本也像CPU那样Q需要隔一D|间取|两次取值的差就是流量?
5、网l流?
|络量也是五花八门Q不q基本上都可以在/proc/net/dev里面获得。同样也是需要两ơ取值取其差作ؓ量倹{?
Linux联盟攉整理 ,转脓h明原始链?如有M疑问Ƣ迎来本站Linux论坛讨论
已有 3 人发表留aQ猛?>>q里<<-参与讨论
JavaEye推荐
]]>
声明Q本文系JavaEye|站发布的原创博客文章，未经作者书面许可，严禁M|站转蝲本文Q否则必追I法律责任！
Java代码
#mib.properties
#Fri Jul 11 15:57:28 CST 2008
1.3.6.1.2.1.1.6.0=beijing
1.3.6.1.2.1.1.8.0=test
1.3.6.1.2.1.1.5.0=admin
1.3.6.1.2.1.1.7.0=8899
#mib.properties
#Fri Jul 11 15:57:28 CST 2008
1.3.6.1.2.1.1.6.0=beijing
1.3.6.1.2.1.1.8.0=test
1.3.6.1.2.1.1.5.0=admin
1.3.6.1.2.1.1.7.0=8899 mib搞的两天不是很明白，于是自己定义了个配置文g来充当mib库，mib.properties
下面的例子是服务器端Q也是managerQ?
Java代码
import java.io.IOException;
import java.util.Vector;
import org.snmp4j.CommunityTarget;
import org.snmp4j.PDU;
import org.snmp4j.Snmp;
import org.snmp4j.TransportMapping;
import org.snmp4j.event.ResponseEvent;
import org.snmp4j.mp.SnmpConstants;
import org.snmp4j.smi.Address;
import org.snmp4j.smi.GenericAddress;
import org.snmp4j.smi.OID;
import org.snmp4j.smi.OctetString;
import org.snmp4j.smi.VariableBinding;
import org.snmp4j.transport.DefaultUdpTransportMapping;
public class SnmpUtil {
private Snmp snmp = null;
private Address targetAddress = null;
public void initComm() throws IOException {
// 讄Agent方的IP和端?nbsp;
targetAddress = GenericAddress.parse("udp:192.168.10.191/161");
TransportMapping transport = new DefaultUdpTransportMapping();
snmp = new Snmp(transport);
transport.listen();
}
public ResponseEvent sendPDU(PDU pdu) throws IOException {
// 讄 target
CommunityTarget target = new CommunityTarget();
target.setCommunity(new OctetString("public"));
target.setAddress(targetAddress);
// 通信不成功时的重试次?nbsp;
target.setRetries(2);
// 时旉
target.setTimeout(1500);
target.setVersion(SnmpConstants.version1);
// 向Agent发送PDUQƈq回Response
return snmp.send(pdu, target);
}
public void setPDU() throws IOException {
// set PDU
PDU pdu = new PDU();
pdu.add(new VariableBinding(new OID(new int[] { 1, 3, 6, 1, 2, 1, 1, 7,
0 }), new OctetString("8899")));
pdu.setType(PDU.SET);
sendPDU(pdu);
}
public void getPDU() throws IOException {
// get PDU
PDU pdu = new PDU();
pdu.add(new VariableBinding(new OID(new int[] { 1, 3, 6, 1, 2, 1, 1, 6,
0 })));// pcName
pdu.setType(PDU.GET);
readResponse(sendPDU(pdu));
}
public void readResponse(ResponseEvent respEvnt) {
// 解析Response
System.out.println("----------解析Response-------------");
if (respEvnt != null && respEvnt.getResponse() != null) {
Vector<VariableBinding> recVBs = respEvnt.getResponse()
.getVariableBindings();
for (int i = 0; i < recVBs.size(); i++) {
VariableBinding recVB = recVBs.elementAt(i);
System.out
.println(recVB.getOid() + " : " + recVB.getVariable());
}
}
}
public static void main(String[] args) {
System.out.println("----------start-------------");
try {
SnmpUtil util = new SnmpUtil();
util.initComm();
util.setPDU();
util.getPDU();
} catch (IOException e) {
e.printStackTrace();
}
}
}
import java.io.IOException;
import java.util.Vector;
import org.snmp4j.CommunityTarget;
import org.snmp4j.PDU;
import org.snmp4j.Snmp;
import org.snmp4j.TransportMapping;
import org.snmp4j.event.ResponseEvent;
import org.snmp4j.mp.SnmpConstants;
import org.snmp4j.smi.Address;
import org.snmp4j.smi.GenericAddress;
import org.snmp4j.smi.OID;
import org.snmp4j.smi.OctetString;
import org.snmp4j.smi.VariableBinding;
import org.snmp4j.transport.DefaultUdpTransportMapping;
public class SnmpUtil {
private Snmp snmp = null;
private Address targetAddress = null;
public void initComm() throws IOException {
// 讄Agent方的IP和端?
targetAddress = GenericAddress.parse("udp:192.168.10.191/161");
TransportMapping transport = new DefaultUdpTransportMapping();
snmp = new Snmp(transport);
transport.listen();
}
public ResponseEvent sendPDU(PDU pdu) throws IOException {
// 讄 target
CommunityTarget target = new CommunityTarget();
target.setCommunity(new OctetString("public"));
target.setAddress(targetAddress);
// 通信不成功时的重试次?
target.setRetries(2);
// 时旉
target.setTimeout(1500);
target.setVersion(SnmpConstants.version1);
// 向Agent发送PDUQƈq回Response
return snmp.send(pdu, target);
}
public void setPDU() throws IOException {
// set PDU
PDU pdu = new PDU();
pdu.add(new VariableBinding(new OID(new int[] { 1, 3, 6, 1, 2, 1, 1, 7,
0 }), new OctetString("8899")));
pdu.setType(PDU.SET);
sendPDU(pdu);
}
public void getPDU() throws IOException {
// get PDU
PDU pdu = new PDU();
pdu.add(new VariableBinding(new OID(new int[] { 1, 3, 6, 1, 2, 1, 1, 6,
0 })));// pcName
pdu.setType(PDU.GET);
readResponse(sendPDU(pdu));
}
public void readResponse(ResponseEvent respEvnt) {
// 解析Response
System.out.println("----------解析Response-------------");
if (respEvnt != null && respEvnt.getResponse() != null) {
Vector<VariableBinding> recVBs = respEvnt.getResponse()
.getVariableBindings();
for (int i = 0; i < recVBs.size(); i++) {
VariableBinding recVB = recVBs.elementAt(i);
System.out
.println(recVB.getOid() + " : " + recVB.getVariable());
}
}
}
public static void main(String[] args) {
System.out.println("----------start-------------");
try {
SnmpUtil util = new SnmpUtil();
util.initComm();
util.setPDU();
util.getPDU();
} catch (IOException e) {
e.printStackTrace();
}
}
}
agent代理端代码：
Java代码
import java.util.*;
/**
* ａｇｅｎｔ代理端
* leo
* 20080710
*/
import org.snmp4j.*;
import org.snmp4j.smi.*;
import snmputil.Config;
public class OTAAgent {
public static class Handler implements org.snmp4j.CommandResponder {
protected java.lang.String mAddress = null;
protected int mPort = 0;
protected java.lang.String mMyCommunityName = null;
protected org.snmp4j.TransportMapping mServerSocket = null;
protected org.snmp4j.Snmp mSNMP = null;
public Handler() {
}
public void configure() {
mAddress = "192.168.10.191";
mPort = 161;
mMyCommunityName = "OAagent";
}
public void start() {
try {
mServerSocket = new org.snmp4j.transport.DefaultUdpTransportMapping(
new org.snmp4j.smi.UdpAddress(java.net.InetAddress
.getByName(mAddress), mPort));
mSNMP = new org.snmp4j.Snmp(mServerSocket);
mSNMP.addCommandResponder(this);
mServerSocket.listen();
} catch (java.net.UnknownHostException vException) {
System.out.println(vException);
} catch (java.io.IOException vException) {
System.out.println(vException);
}
}
public synchronized void processPdu(
org.snmp4j.CommandResponderEvent aEvent) {
java.lang.String vCommunityName = new java.lang.String(aEvent
.getSecurityName());
System.out.println("Community name " + vCommunityName);
org.snmp4j.PDU vPDU = aEvent.getPDU();
Config config=new Config();
if (vPDU == null) {
System.out.println("Null pdu");
} else {
System.out.println("(rcv) " + vPDU.toString());
switch (vPDU.getType()) {
case org.snmp4j.PDU.GET:
case org.snmp4j.PDU.GETNEXT:
break;
case org.snmp4j.PDU.SET:
System.out.println("------SET----------");
String reciv=vPDU.get(0).getVariable().getSyntaxString();
System.out.println("----set------"+vPDU.get(0).toString());
String setoid=vPDU.get(0).toString();
System.out.println("-----set-----"+setoid.substring(0, setoid.indexOf("=")-1));
System.out.println("-----set-----"+setoid.substring(setoid.indexOf("=")+1));
config.setValueByOID(setoid.substring(0, setoid.indexOf("=")-1).trim(), setoid.substring(setoid.indexOf("=")+1).trim());
}
org.snmp4j.mp.StatusInformation statusInformation = new org.snmp4j.mp.StatusInformation();
org.snmp4j.mp.StateReference ref = aEvent.getStateReference();
try {
System.out.println("Sending response");
vPDU.setType(PDU.RESPONSE);
OID oid=vPDU.get(0).getOid();
String setoid=vPDU.get(0).toString();
System.out.println("----get------"+setoid.substring(0, setoid.indexOf("=")-1));
System.out.println("-----get-----"+setoid.substring(setoid.indexOf("=")+1));
vPDU.set(0, new VariableBinding(oid,
new OctetString(config.getValueByOID(setoid.substring(0, setoid.indexOf("=")-1).trim()))));
aEvent.getMessageDispatcher().returnResponsePdu(
aEvent.getMessageProcessingModel(),
aEvent.getSecurityModel(),
aEvent.getSecurityName(),
aEvent.getSecurityLevel(), vPDU,
aEvent.getMaxSizeResponsePDU(), ref,
statusInformation);
} catch (org.snmp4j.MessageException vException) {
System.out.println(vException);
}
}
}
}
public static void main(String argv[]) {
Handler h = new Handler();
/** 初始化参?* */
h.configure();
h.start();
/** Do nothing loop * */
while (true) {
System.out.println("----------loop-------------");
synchronized (OTAAgent.class) {
try {
OTAAgent.class.wait();
} catch (Exception e) {
}
}
}
}
}
import java.util.*;
/**
* ａｇｅｎｔ代理端
* leo
* 20080710
*/
import org.snmp4j.*;
import org.snmp4j.smi.*;
import snmputil.Config;
public class OTAAgent {
public static class Handler implements org.snmp4j.CommandResponder {
protected java.lang.String mAddress = null;
protected int mPort = 0;
protected java.lang.String mMyCommunityName = null;
protected org.snmp4j.TransportMapping mServerSocket = null;
protected org.snmp4j.Snmp mSNMP = null;
public Handler() {
}
public void configure() {
mAddress = "192.168.10.191";
mPort = 161;
mMyCommunityName = "OAagent";
}
public void start() {
try {
mServerSocket = new org.snmp4j.transport.DefaultUdpTransportMapping(
new org.snmp4j.smi.UdpAddress(java.net.InetAddress
.getByName(mAddress), mPort));
mSNMP = new org.snmp4j.Snmp(mServerSocket);
mSNMP.addCommandResponder(this);
mServerSocket.listen();
} catch (java.net.UnknownHostException vException) {
System.out.println(vException);
} catch (java.io.IOException vException) {
System.out.println(vException);
}
}
public synchronized void processPdu(
org.snmp4j.CommandResponderEvent aEvent) {
java.lang.String vCommunityName = new java.lang.String(aEvent
.getSecurityName());
System.out.println("Community name " + vCommunityName);
org.snmp4j.PDU vPDU = aEvent.getPDU();
Config config=new Config();
if (vPDU == null) {
System.out.println("Null pdu");
} else {
System.out.println("(rcv) " + vPDU.toString());
switch (vPDU.getType()) {
case org.snmp4j.PDU.GET:
case org.snmp4j.PDU.GETNEXT:
break;
case org.snmp4j.PDU.SET:
System.out.println("------SET----------");
String reciv=vPDU.get(0).getVariable().getSyntaxString();
System.out.println("----set------"+vPDU.get(0).toString());
String setoid=vPDU.get(0).toString();
System.out.println("-----set-----"+setoid.substring(0, setoid.indexOf("=")-1));
System.out.println("-----set-----"+setoid.substring(setoid.indexOf("=")+1));
config.setValueByOID(setoid.substring(0, setoid.indexOf("=")-1).trim(), setoid.substring(setoid.indexOf("=")+1).trim());
}
org.snmp4j.mp.StatusInformation statusInformation = new org.snmp4j.mp.StatusInformation();
org.snmp4j.mp.StateReference ref = aEvent.getStateReference();
try {
System.out.println("Sending response");
vPDU.setType(PDU.RESPONSE);
OID oid=vPDU.get(0).getOid();
String setoid=vPDU.get(0).toString();
System.out.println("----get------"+setoid.substring(0, setoid.indexOf("=")-1));
System.out.println("-----get-----"+setoid.substring(setoid.indexOf("=")+1));
vPDU.set(0, new VariableBinding(oid,
new OctetString(config.getValueByOID(setoid.substring(0, setoid.indexOf("=")-1).trim()))));
aEvent.getMessageDispatcher().returnResponsePdu(
aEvent.getMessageProcessingModel(),
aEvent.getSecurityModel(),
aEvent.getSecurityName(),
aEvent.getSecurityLevel(), vPDU,
aEvent.getMaxSizeResponsePDU(), ref,
statusInformation);
} catch (org.snmp4j.MessageException vException) {
System.out.println(vException);
}
}
}
}
public static void main(String argv[]) {
Handler h = new Handler();
/** 初始化参?* */
h.configure();
h.start();
/** Do nothing loop * */
while (true) {
System.out.println("----------loop-------------");
synchronized (OTAAgent.class) {
try {
OTAAgent.class.wait();
} catch (Exception e) {
}
}
}
}
}
q有一个就是获取和保存mib信息的类Q?
Java代码
package snmputil;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.IOException;
import java.util.HashMap;
import java.util.Hashtable;
import java.util.Map;
import java.util.Properties;
public class Config {
Properties properties;
Map map;
public Config() {
properties = new Properties();
try {
properties.load(new FileInputStream("mib.properties"));
} catch (IOException e) {
System.out.println("dproperties文g错误");
e.printStackTrace();
}
}
/**
* Ҏoid获取value
*
* @param oid
* @return
*/
public String getValueByOID(String oid) {
return properties.getProperty(oid);
}
public void setValueByOID(String oid, String value) {
properties.setProperty(oid, value);
try {
properties.store(new FileOutputStream("mib.properties"),"mib.properties");
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
//试d?nbsp;
public static void main(String[] args) {
Config cfg=new Config();
String oid="1.3.6.1.2.1.1.8.0";
System.out.println("---------"+cfg.getValueByOID(oid));
cfg.setValueByOID(oid, "test");
System.out.println("---------"+cfg.getValueByOID(oid));
}
}
package snmputil;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.IOException;
import java.util.HashMap;
import java.util.Hashtable;
import java.util.Map;
import java.util.Properties;
public class Config {
Properties properties;
Map map;
public Config() {
properties = new Properties();
try {
properties.load(new FileInputStream("mib.properties"));
} catch (IOException e) {
System.out.println("dproperties文g错误");
e.printStackTrace();
}
}
/**
* Ҏoid获取value
*
* @param oid
* @return
*/
public String getValueByOID(String oid) {
return properties.getProperty(oid);
}
public void setValueByOID(String oid, String value) {
properties.setProperty(oid, value);
try {
properties.store(new FileOutputStream("mib.properties"),"mib.properties");
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
//试d?
public static void main(String[] args) {
Config cfg=new Config();
String oid="1.3.6.1.2.1.1.8.0";
System.out.println("---------"+cfg.getValueByOID(oid));
cfg.setValueByOID(oid, "test");
System.out.println("---------"+cfg.getValueByOID(oid));
}
}
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PDUQ协议数据单元）Q用来表C管理站跟代理站点进行通信的数据。包括PDU的类型、传输的数据集合、错误说明等?
除Snmpv1 Trap外，其他操作cd的PDU大致相同?
Snmp4j针对Snmp的各个版本，开发了三个有关PDU的类。PDUQ针对Snmpv2cQ、PDUv1Q针对Snmpv1Q、ScopedPDUQ针对Snmpv3Q，但三个类除各自特别的一些参数外Q都基本相同。所以Snmp4j在设计的时候，PDU设计成另外两个的类Q他们能够׃n大部分功能?
Q?QPDU
1QpducdQSnmpv1支持5U，get、set、getnext、trap、getresponse,Snmpv2c增加了getbulk、informQ?
int getTypeQ）
void setTypeQint type)
2Q错误（主要?U错误，请参见RFCQ?
void setErrorStatus(int status)
int getErrorStatus()
String getErrorStatusText()
void setErrorIndexQint indexQ?
int getErrorindexQ）
3Q变?
void add(VariableBinding vb) // 对于除get、getnext、getbulk?
void addAll(VariableBinding[] vbs) // 对于除get、getnext、getbulk外的
void addOID(VariableBinding vb) // 对于get、getnext、getbulk
void addAllOID(VariableBinding[] vbs) // 对于get、getnext、getbulk
VariableBinding getQint iQ?
VariableBinding[] toArray()
Vector getVariableBindings()
void setQint iQVariableBinding vbQ?
void removeQint iQ?
void clearQ）
int sizeQ）
Q?QPDUv1
PDUv1l承了PDUQ除Snmp v1 trap操作?Q其它都跟PDU相同。因为Snmp v1的Trap设计PDU不同于其他操作的PDUQ它包括Q对象标识符QOIDQ、代理ip地址Qagent-addrQ、时间戳Qtime-stampQ、通用代理cdQgeneric-trapQ、特定代理类型（specific-trap)。所以相应的增加了对q些字段的get/set操作。具体参见API文档?
Q?QScopedPDU
SnmpV3采用了不同安全策略，它的PDU也增加了有关安全斚w的几个字D：上下文名UͼContextNameQ、上下文引擎IDQcontextEngineIDQ等Q其它PDU字段属于USM来管理?
所以ScopedPDU在PDU的基上增加了相应的get/set操作。参见API?
CZ代码如下Q（摘自API文档Q?
SNMPv1/v2c GETNEXT PDU
import org.snmp4j.PDU;
import org.snmp4j.smi.*;
...
PDU pdu = new PDU();
pdu.add(new VariableBinding(new OID("1.3.6.1.2.1.1.1"))); // sysDescr
pdu.add(new VariableBinding(new OID("1.3.6.1.2.1.2.1"))); // ifNumber
pdu.setType(PDU.GETNEXT);
...SNMPv3 GETBULK PDU
import org.snmp4j.ScopedPDU;
import org.snmp4j.smi.*;
...
ScopedPDU pdu = new ScopedPDU();
pdu.add(new VariableBinding(new OID("1.3.6.1.2.1.2.1"))); // ifNumber
pdu.add(new VariableBinding(new OID("1.3.6.1.2.1.2.2.1.10"))); // ifInOctets
pdu.add(new VariableBinding(new OID("1.3.6.1.2.1.2.2.1.16"))); // ifOutOctets
pdu.setType(PDU.GETBULK);
pdu.setMaxRepetitions(50);
// Get ifNumber only once
pdu.setNonRepeaters(1);
// set context non-default context (default context does not need to be set)
pdu.setContextName(new OctetString("subSystemContextA"));
// set non-default context engine ID (to use targets authoritative engine ID
// use an empty (size == 0) octet string)
pdu.setContextEngineID(OctetString.fromHexString("80:00:13:70:c0:a8:01:0d"));
...SNMPv1 TRAP PDU
import org.snmp4j.PDUv1;
...
PDUv1 pdu = new PDUv1();
pdu.setType(PDU.V1TRAP);
pdu.setGenericTrap(PDUv1.COLDSTART);
...SNMPv2c/SNMPv3 INFORM PDU
import org.snmp4j.ScopedPDU;
...
ScopedPDU pdu = new ScopedPDU();
pdu.setType(PDU.INFORM);
// sysUpTime
long sysUpTime = (System.currentTimeMillis() - startTime) / 10;
pdu.add(new VariableBinding(SnmpConstants.sysUpTime, new TimeTicks(sysUpTime)));
pdu.add(new VariableBinding(SnmpConstants.snmpTrapOID, SnmpConstants.linkDown));
// payload
pdu.add(new VariableBinding(new OID("1.3.6.1.2.1.2.2.1.1"+downIndex),
new Integer32(downIndex)));
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关于Snmp4j包，最重要三个概念Q也是三个类QSnmp、Target、PDU?
TargetQ表C理的设备。对于一个被理的设备，我们x它的AddressQ它使用的协议版本versionQ访问它的用户名和密码、以及对q个讑֤我们讄跟它打交道的一些策略，比如时旉、重传次数等。所以有如下ҎQ?
1Q获取或者设|ip地址
void setAddressQAddress addressQ?nbsp;
Address getAddressQ）
2Q设|或者获取版本号Q支持V1QV2cQV3Q?
void setVersionQint verQ?
int getVersionQ）
3Q超时时?Q?单位Qmilliseconds Q?
void setTimeout(long outQ?
long getTimeoutQ）
4Q重传次?
void setRetries(int retries)
int getRetries()
5Q最大PDU大小?
void setMaxSizeRequestPDUQint maxQ?
int getMaxSizeRequestPDUQ）
上面q些对于Snmp三个版本都是相同的，不同的只是在于安全方面，具体来说QSnmpv1Qv2c采用共同体（communityQ方式，安全性很差；SnmpV3采用Z用户的安全（USMQ方式，安全性能得到很大提高?
Q?Q?对于Snmpv1Qv2cQ用TargetzZ个子cCommunityTargetQ增加了对Community的方法：
void setCommunityQOctetString communityQ?
OctetString getCommunityQ）
Q?Q对于SnmpV3Q用其子类UserTargetQ增加了一些有关USM安全斚w的设|，比如采用的安全模型、安全别、访问该讑֤的用户名以及权威引擎IDQauthoritative engine IDQ：
iQ安全别（支持三种安全U别Q?
void setSecurityLevel(int level)
int getSecurityLevel()
iiQ访问用户名Q该讉K用户名称必须在设|USM的时候添加其相应的UsmUserQ?
void setSecurityName(OctetString name)
OctetString getSecurityName()
iiiQ安全模型（支持三种安全模型Q?
void setSecurityModel(int model)
int getSecurityModel()
VQ权威引擎IDQauthoritative engine IDQ?
void setAuthoritativeEngineID(byte[] id)
byte[] getAuthoritativeEngineIDQ）
对于Target的代码大致如下：Q摘自Snmp4j的说明文档）
Community Target
CommunityTarget target = new CommunityTarget();
target.setCommunity(new OctetString("public"));
target.setAddress(targetAddress);
target.setVersion(SnmpConstants.version1);User Target
UserTarget target = new UserTarget();
target.setAddress(targetAddress);
target.setRetries(1);
// set timeout to 500 milliseconds -> 2*500ms = 1s total timeout
target.setTimeout(500);
target.setVersion(SnmpConstants.version3);
target.setSecurityLevel(SecurityLevel.AUTH_PRIV);
target.setSecurityName(new OctetString("MD5DES"));
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ａｇｅｎｔ代理端例子Q?
Java代码
import java.util.*;
import org.snmp4j.*;
import org.snmp4j.smi.*;
//ａｇｅｎｔ代理端例子Q?nbsp;
public class Test2 {
public static class Handler implements org.snmp4j.CommandResponder {
protected java.lang.String mAddress = null;
protected int mPort = 0;
protected java.lang.String mMyCommunityName = null;
protected org.snmp4j.TransportMapping mServerSocket = null;
protected org.snmp4j.Snmp mSNMP = null;
public Handler() {
}
public void configure() {
mAddress = "192.168.10.191";
mPort = 161;
mMyCommunityName = "test";
}
public void start() {
try {
mServerSocket = new org.snmp4j.transport.DefaultUdpTransportMapping(
new org.snmp4j.smi.UdpAddress(java.net.InetAddress
.getByName(mAddress), mPort));
mSNMP = new org.snmp4j.Snmp(mServerSocket);
mSNMP.addCommandResponder(this);
mServerSocket.listen();
} catch (java.net.UnknownHostException vException) {
System.out.println(vException);
} catch (java.io.IOException vException) {
System.out.println(vException);
}
}
public synchronized void processPdu(
org.snmp4j.CommandResponderEvent aEvent) {
java.lang.String vCommunityName = new java.lang.String(aEvent
.getSecurityName());
System.out.println("Community name " + vCommunityName);
org.snmp4j.PDU vPDU = aEvent.getPDU();
if (vPDU == null) {
System.out.println("Null pdu");
} else {
System.out.println("(rcv) " + vPDU.toString());
switch (vPDU.getType()) {
case org.snmp4j.PDU.GET:
case org.snmp4j.PDU.GETNEXT:
break;
}
org.snmp4j.mp.StatusInformation statusInformation = new org.snmp4j.mp.StatusInformation();
org.snmp4j.mp.StateReference ref = aEvent.getStateReference();
try {
System.out.println("Sending response");
vPDU.setType(PDU.RESPONSE);
vPDU.set(0, new VariableBinding(vPDU.get(0).getOid(),
new OctetString("Test")));
aEvent.getMessageDispatcher().returnResponsePdu(
aEvent.getMessageProcessingModel(),
aEvent.getSecurityModel(),
aEvent.getSecurityName(),
aEvent.getSecurityLevel(), vPDU,
aEvent.getMaxSizeResponsePDU(), ref,
statusInformation);
} catch (org.snmp4j.MessageException vException) {
System.out.println(vException);
}
}
}
}
public static void main(String argv[]) {
Handler h = new Handler();
h.configure();
h.start();
/** Do nothing loop * */
while (true) {
synchronized (Test2.class) {
try {
Test2.class.wait();
} catch (Exception e) {
}
}
}
}
}
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Linux SNMP OID’s for CPU,Memory and Disk Statistics
SNMP stands for Simple Network Management Protocol and consists of three key components: managed devices, agents, and network-management systems (NMSs). A managed device is a node that has an SNMP agent and resides on a managed network. These devices can be routers and access server, switches and bridges, hubs, computer hosts, or printers. An agent is a software module residing within a device. This agent translates information into a compatible format with SNMP. An NMS runs monitoring applications. They provide the bulk of processing and memory resources required for network management.
SNMP MIBs, OIDs Overview
MIB stands for Management Information Base and is a collection of information organized hierarchically. These are accessed using a protocol such as SNMP. There are two types of MIBs: scalar and tabular. Scalar objects define a single object instance whereas tabular objects define multiple related object instances grouped in MIB tables.
MIB files for specific devices or systems can be downloaded from here
OIDs or Object Identifiers uniquely identify manged objects in a MIB hierarchy. This can be depicted as a tree, the levels of which are assigned by different organizations. Top level MIB object IDs (OIDs) belong to different standard organizations. Vendors define private branches including managed objects for their own products.
Here is a sample structure of an OID
Iso (1).org(3).dod(6).internet(1).private(4).transition(868).products(2).chassis(4).card(1).slotCps(2)B
.BcpsSlotSummary(1).cpsModuleTable(1).cpsModuleEntry(1).cpsModuleModel(3).3562.3
Most of the people may be looking for OID’s for Linux OID’s for CPU,Memory and Disk Statistics for this first you need to install SNMP server and clients. If you want to install SNMP server and client installation in linux学习 check here
CPU Statistics
Load
1 minute Load: .1.3.6.1.4.1.2021.10.1.3.1
5 minute Load: .1.3.6.1.4.1.2021.10.1.3.2
15 minute Load: .1.3.6.1.4.1.2021.10.1.3.3
CPU
percentage of user CPU time: .1.3.6.1.4.1.2021.11.9.0
raw user cpu time: .1.3.6.1.4.1.2021.11.50.0
percentages of system CPU time: .1.3.6.1.4.1.2021.11.10.0
raw system cpu time: .1.3.6.1.4.1.2021.11.52.0
percentages of idle CPU time: .1.3.6.1.4.1.2021.11.11.0
raw idle cpu time: .1.3.6.1.4.1.2021.11.53.0
raw nice cpu time: .1.3.6.1.4.1.2021.11.51.0
Memory Statistics
Total Swap Size: .1.3.6.1.4.1.2021.4.3.0
Available Swap Space: .1.3.6.1.4.1.2021.4.4.0
Total RAM in machine: .1.3.6.1.4.1.2021.4.5.0
Total RAM used: .1.3.6.1.4.1.2021.4.6.0
Total RAM Free: .1.3.6.1.4.1.2021.4.11.0
Total RAM Shared: .1.3.6.1.4.1.2021.4.13.0
Total RAM Buffered: .1.3.6.1.4.1.2021.4.14.0
Total Cached Memory: .1.3.6.1.4.1.2021.4.15.0
Disk Statistics
The snmpd.conf needs to be edited. Add the following (assuming a machine with a single ??partition):
disk / 100000 (or)
includeAllDisks 10% for all partitions and disks
The OIDs are as follows
Path where the disk is mounted: .1.3.6.1.4.1.2021.9.1.2.1
Path of the device for the partition: .1.3.6.1.4.1.2021.9.1.3.1
Total size of the disk/partion (kBytes): .1.3.6.1.4.1.2021.9.1.6.1
Available space on the disk: .1.3.6.1.4.1.2021.9.1.7.1
Used space on the disk: .1.3.6.1.4.1.2021.9.1.8.1
Percentage of space used on disk: .1.3.6.1.4.1.2021.9.1.9.1
Percentage of inodes used on disk: .1.3.6.1.4.1.2021.9.1.10.1
System Uptime: .1.3.6.1.2.1.1.3.0
Examples
These Commands you need to run on the SNMP server
Get available disk space for / on the target host
#snmpget -v 1 -c “community?target_name_or_ip .1.3.6.1.4.1.2021.9.1.7.1
this will return available disk space for the first entry in the ‘disk?section of snmpd.conf; replace 1 with n for the nth entry
Get the 1-minute system load on the target host
#snmpget -v 1 -c “community?target_name_or_ip .1.3.6.1.4.1.2021.10.1.3.1
Get the 5-minute system load on the target host
#snmpget -v 1 -c “community?target_name_or_ip .1.3.6.1.4.1.2021.10.1.3.2
Get the 15-minute system load on the target host
#snmpget -v 1 -c “community?target_name_or_ip .1.3.6.1.4.1.2021.10.1.3.3
Get amount of available swap space on the target host
#snmpget -v 1 -c “community?target_name_or_ip .1.3.6.1.4.1.2021.4.4.0
Variable Descriptor Object Identifier
System Group
sysDescr 1.3.6.1.2.1.1.1
sysObjectID 1.3.6.1.2.1.1.2
sysUpTime 1.3.6.1.2.1.1.3
sysContact 1.3.6.1.2.1.1.4
sysName 1.3.6.1.2.1.1.5
sysLocation 1.3.6.1.2.1.1.6
sysServices 1.3.6.1.2.1.1.7
Interfaces Group
ifNumber 1.3.6.1.2.1.2.1
ifTable 1.3.6.1.2.1.2.2
ifEntry 1.3.6.1.2.1.2.2.1
ifIndex 1.3.6.1.2.1.2.2.1.1
ifDescr 1.3.6.1.2.1.2.2.1.2
ifType 1.3.6.1.2.1.2.2.1.3
ifMtu 1.3.6.1.2.1.2.2.1.4
ifSpeed 1.3.6.1.2.1.2.2.1.5
ifPhysAddress 1.3.6.1.2.1.2.2.1.6
ifAdminStatus 1.3.6.1.2.1.2.2.1.7
ifOperStatus 1.3.6.1.2.1.2.2.1.8
ifLastChange 1.3.6.1.2.1.2.2.1.9
ifInOctets 1.3.6.1.2.1.2.2.1.10
ifInUcastPkts 1.3.6.1.2.1.2.2.1.11
ifInNUcastPkts 1.3.6.1.2.1.2.2.1.12
ifInDiscards 1.3.6.1.2.1.2.2.1.13
ifInErrors 1.3.6.1.2.1.2.2.1.14
ifInUnknownProtos 1.3.6.1.2.1.2.2.1.15
ifOutOctets 1.3.6.1.2.1.2.2.1.16
ifOutUcastPkts 1.3.6.1.2.1.2.2.1.17
ifOutNUcastPkts 1.3.6.1.2.1.2.2.1.18
ifOutDiscards 1.3.6.1.2.1.2.2.1.19
ifOutErrors 1.3.6.1.2.1.2.2.1.20
ifOutQLen 1.3.6.1.2.1.2.2.1.21
ifSpecific 1.3.6.1.2.1.2.2.1.22
IP Group
ipForwarding 1.3.6.1.2.1.4.1
ipDefaultTTL 1.3.6.1.2.1.4.2
ipInReceives 1.3.6.1.2.1.4.3
ipInHdrErrors 1.3.6.1.2.1.4.4
ipInAddrErrors 1.3.6.1.2.1.4.5
ipForwDatagrams 1.3.6.1.2.1.4.6
ipInUnknownProtos 1.3.6.1.2.1.4.7
ipInDiscards 1.3.6.1.2.1.4.8
ipInDelivers 1.3.6.1.2.1.4.9
ipOutRequests 1.3.6.1.2.1.4.10
ipOutDiscards 1.3.6.1.2.1.4.11
ipOutNoRoutes 1.3.6.1.2.1.4.12
ipReasmTimeout 1.3.6.1.2.1.4.13
ipReasmReqds 1.3.6.1.2.1.4.14
ipReasmOKs 1.3.6.1.2.1.4.15
ipReasmFails 1.3.6.1.2.1.4.16
ipFragsOKs 1.3.6.1.2.1.4.17
ipFragsFails 1.3.6.1.2.1.4.18
ipFragCreates 1.3.6.1.2.1.4.19
ipAddrTable 1.3.6.1.2.1.4.20
ipAddrEntry 1.3.6.1.2.1.4.20.1
ipAdEntAddr 1.3.6.1.2.1.4.20.1.1
ipAdEntIfIndex 1.3.6.1.2.1.4.20.1.2
ipAdEntNetMask 1.3.6.1.2.1.4.20.1.3
ipAdEntBcastAddr 1.3.6.1.2.1.4.20.1.4
ipAdEntReasmMaxSize 1.3.6.1.2.1.4.20.1.5
ICMP Group
icmpInMsgs 1.3.6.1.2.1.5.1
icmpInErrors 1.3.6.1.2.1.5.2
icmpInDestUnreachs 1.3.6.1.2.1.5.3
icmpInTimeExcds 1.3.6.1.2.1.5.4
icmpInParmProbs 1.3.6.1.2.1.5.5
icmpInSrcQuenchs 1.3.6.1.2.1.5.6
icmpInRedirects 1.3.6.1.2.1.5.7
icmpInEchos 1.3.6.1.2.1.5.8
icmpInEchoReps 1.3.6.1.2.1.5.9
icmpInTimestamps 1.3.6.1.2.1.5.10
icmpInTimestampReps 1.3.6.1.2.1.5.11
icmpInAddrMasks 1.3.6.1.2.1.5.12
icmpInAddrMaskReps 1.3.6.1.2.1.5.13
icmpOutMsgs 1.3.6.1.2.1.5.14
icmpOutErrors 1.3.6.1.2.1.5.15
icmpOutDestUnreachs 1.3.6.1.2.1.5.16
icmpOutTimeExcds 1.3.6.1.2.1.5.17
icmpOutParmProbs 1.3.6.1.2.1.5.18
icmpOutSrcQuenchs 1.3.6.1.2.1.5.19
icmpOutRedirects 1.3.6.1.2.1.5.20
icmpOutEchos 1.3.6.1.2.1.5.21
icmpOutEchoReps 1.3.6.1.2.1.5.22
icmpOutTimestamps 1.3.6.1.2.1.5.23
icmpOutTimestampReps 1.3.6.1.2.1.5.24
icmpOutAddrMasks 1.3.6.1.2.1.5.25
icmpOutAddrMaskReps 1.3.6.1.2.1.5.26
TCP Group
tcpRtoAlgorithm 1.3.6.1.2.1.6.1
tcpRtoMin 1.3.6.1.2.1.6.2
tcpRtoMax 1.3.6.1.2.1.6.3
tcpMaxConn 1.3.6.1.2.1.6.4
tcpActiveOpens 1.3.6.1.2.1.6.5
tcpPassiveOpens 1.3.6.1.2.1.6.6
tcpAttemptFails 1.3.6.1.2.1.6.7
tcpEstabResets 1.3.6.1.2.1.6.8
tcpCurrEstab 1.3.6.1.2.1.6.9
tcpInSegs 1.3.6.1.2.1.6.10
tcpOutSegs 1.3.6.1.2.1.6.11
tcpRetransSegs 1.3.6.1.2.1.6.12
tcpConnTable 1.3.6.1.2.1.6.13
tcpConnEntry 1.3.6.1.2.1.6.13.1
tcpConnState 1.3.6.1.2.1.6.13.1.1
tcpConnLocalAddress 1.3.6.1.2.1.6.13.1.2
tcpConnLocalPort 1.3.6.1.2.1.6.13.1.3
tcpConnRemAddress 1.3.6.1.2.1.6.13.1.4
tcpConnRemPort 1.3.6.1.2.1.6.13.1.5
tcpInErrs 1.3.6.1.2.1.6.14
tcpOutRsts 1.3.6.1.2.1.6.15
UDP Group
udpInDatagrams 1.3.6.1.2.1.7.1
udpNoPorts 1.3.6.1.2.1.7.2
udpInErrors 1.3.6.1.2.1.7.3
udpOutDatagrams 1.3.6.1.2.1.7.4
udpTable 1.3.6.1.2.1.7.5
udpEntry 1.3.6.1.2.1.7.5.1
udpLocalAddress 1.3.6.1.2.1.7.5.1.1
udpLocalPort 1.3.6.1.2.1.7.5.1.2
SNMP Group
snmpInPkts 1.3.6.1.2.1.11.1
snmpOutPkts 1.3.6.1.2.1.11.2
snmpInBadVersions 1.3.6.1.2.1.11.3
snmpInBadCommunityNames 1.3.6.1.2.1.11.4
snmpInBadCommunityUses 1.3.6.1.2.1.11.5
snmpInASNParseErrs 1.3.6.1.2.1.11.6
NOT USED 1.3.6.1.2.1.11.7
snmpInTooBigs 1.3.6.1.2.1.11.8
snmpInNoSuchNames 1.3.6.1.2.1.11.9
snmpInBadValues 1.3.6.1.2.1.11.10
snmpInReadOnlys 1.3.6.1.2.1.11.11
snmpInGenErrs 1.3.6.1.2.1.11.12
snmpInTotalReqVars 1.3.6.1.2.1.11.13
snmpInTotalSetVars 1.3.6.1.2.1.11.14
snmpInGetRequests 1.3.6.1.2.1.11.15
snmpInGetNexts 1.3.6.1.2.1.11.16
snmpInSetRequests 1.3.6.1.2.1.11.17
snmpInGetResponses 1.3.6.1.2.1.11.18
snmpInTraps 1.3.6.1.2.1.11.19
snmpOutTooBigs 1.3.6.1.2.1.11.20
snmpOutNoSuchNames 1.3.6.1.2.1.11.21
snmpOutBadValues 1.3.6.1.2.1.11.22
NOT USED 1.3.6.1.2.1.11.23
snmpOutGenErrs 1.3.6.1.2.1.11.24
snmpOutGetRequests 1.3.6.1.2.1.11.25
snmpOutGetNexts 1.3.6.1.2.1.11.26
snmpOutSetRequests 1.3.6.1.2.1.11.27
snmpOutGetResponses 1.3.6.1.2.1.11.28
snmpOutTraps 1.3.6.1.2.1.11.29
snmpEnableAuthenTraps 1.3.6.1.2.1.11.30
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