Hadoop案例（一）之日志清洗
日志清洗案例
一. 简单解析版
1）需求
去除日志中字段长度小于等于11的日志。
2）输入数据
194.237.142.21 - - [/Sep/::: +] "GET /wp-content/uploads/2013/07/rstudio-git3.png HTTP/1.1" "-" "Mozilla/4.0 (compatible;)"
183.49.46.228 - - [/Sep/::: +] "-" "-" "-"
163.177.71.12 - - [/Sep/::: +] "HEAD / HTTP/1.1" "-" "DNSPod-Monitor/1.0"
163.177.71.12 - - [/Sep/::: +] "HEAD / HTTP/1.1" "-" "DNSPod-Monitor/1.0"
101.226.68.137 - - [/Sep/::: +] "HEAD / HTTP/1.1" "-" "DNSPod-Monitor/1.0"
101.226.68.137 - - [/Sep/::: +] "HEAD / HTTP/1.1" "-" "DNSPod-Monitor/1.0"
60.208.6.156 - - [/Sep/::: +] "GET /wp-content/uploads/2013/07/rcassandra.png HTTP/1.0" "http://cos.name/category/software/packages/" "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/29.0.1547.66 Safari/537.36"
222.68.172.190 - - [/Sep/::: +] "GET /images/my.jpg HTTP/1.1" "http://www.angularjs.cn/A00n" "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/29.0.1547.66 Safari/537.36"
222.68.172.190 - - [/Sep/::: +] "-" "-" "-"
183.195.232.138 - - [/Sep/::: +] "HEAD / HTTP/1.1" "-" "DNSPod-Monitor/1.0"
183.195.232.138 - - [/Sep/::: +] "HEAD / HTTP/1.1" "-" "DNSPod-Monitor/1.0"
66.249.66.84 - - [/Sep/::: +] "GET /page/6/ HTTP/1.1" "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"
221.130.41.168 - - [/Sep/::: +] "GET /feed/ HTTP/1.1" "-" "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/29.0.1547.66 Safari/537.36"
157.55.35.40 - - [/Sep/::: +] "GET /robots.txt HTTP/1.1" "-" "Mozilla/5.0 (compatible; bingbot/2.0; +http://www.bing.com/bingbot.htm)"
50.116.27.194 - - [/Sep/::: +] "POST /wp-cron.php?doing_wp_cron=1379487095.2510800361633300781250 HTTP/1.0" "-" "WordPress/3.6; http://blog.fens.me"
58.215.204.118 - - [/Sep/::: +] "GET /nodejs-socketio-chat/ HTTP/1.1" "http://www.google.com/url?sa=t&rct=j&q=nodejs%20%E5%BC%82%E6%AD%A5%E5%B9%BF%E6%92%AD&source=web&cd=1&cad=rja&ved=0CCgQFjAA&url=%68%74%74%70%3a%2f%2f%62%6c%6f%67%2e%66%65%6e%73%2e%6d%65%2f%6e%6f%64%65%6a%73%2d%73%6f%63%6b%65%74%69%6f%2d%63%68%61%74%2f&ei=rko5UrylAefOiAe7_IGQBw&usg=AFQjCNG6YWoZsJ_bSj8kTnMHcH51hYQkAA&bvm=bv.52288139,d.aGc" "Mozilla/5.0 (Windows NT 5.1; rv:23.0) Gecko/20100101 Firefox/23.0"
58.215.204.118 - - [/Sep/::: +] "GET /wp-includes/js/jquery/jquery-migrate.min.js?ver=1.2.1 HTTP/1.1" "http://blog.fens.me/nodejs-socketio-chat/" "Mozilla/5.0 (Windows NT 5.1; rv:23.0) Gecko/20100101 Firefox/23.0"
58.215.204.118 - - [/Sep/::: +] "GET /wp-includes/js/jquery/jquery.js?ver=1.10.2 HTTP/1.1" "http://blog.fens.me/nodejs-socketio-chat/" "Mozilla/5.0 (Windows NT 5.1; rv:23.0) Gecko/20100101 Firefox/23.0"
58.215.204.118 - - [/Sep/::: +] "GET /wp-includes/js/comment-reply.min.js?ver=3.6 HTTP/1.1" "http://blog.fens.me/nodejs-socketio-chat/" "Mozilla/5.0 (Windows NT 5.1; rv:23.0) Gecko/20100101 Firefox/23.0"
58.215.204.118 - - [/Sep/::: +] "GET /wp-content/uploads/2013/08/chat.png HTTP/1.1" "http://blog.fens.me/nodejs-socketio-chat/" "Mozilla/5.0 (Windows NT 5.1; rv:23.0) Gecko/20100101 Firefox/23.0"
58.215.204.118 - - [/Sep/::: +] "GET /wp-content/uploads/2013/08/chat2.png HTTP/1.1" "http://blog.fens.me/nodejs-socketio-chat/" "Mozilla/5.0 (Windows NT 5.1; rv:23.0) Gecko/20100101 Firefox/23.0"
58.215.204.118 - - [/Sep/::: +] "GET /wp-content/uploads/2013/08/socketio.png HTTP/1.1" "http://blog.fens.me/nodejs-socketio-chat/" "Mozilla/5.0 (Windows NT 5.1; rv:23.0) Gecko/20100101 Firefox/23.0"
58.248.178.212 - - [/Sep/::: +] "GET /nodejs-grunt-intro/ HTTP/1.1" "http://blog.fens.me/series-nodejs/" "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.04506.30; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; MDDR; InfoPath.2; .NET4.0C)"
58.248.178.212 - - [/Sep/::: +] "GET /wp-includes/js/jquery/jquery-migrate.min.js?ver=1.2.1 HTTP/1.1" "http://blog.fens.me/nodejs-grunt-intro/" "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.04506.30; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; MDDR; InfoPath.2; .NET4.0C)"
3）实现代码
（1）编写LogMapper
package com.xyg.mapreduce.weblog;
import java.io.IOException;
import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.io.NullWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Mapper; public class LogMapper extends Mapper<LongWritable, Text, Text, NullWritable>{ Text k = new Text(); @Override
protected void map(LongWritable key, Text value, Context context) throws IOException, InterruptedException { // 1 获取1行数据
String line = value.toString();
// 2 解析日志
boolean result = parseLog(line,context);
// 3 日志不合法退出
if (!result) {
return;
}
// 4 设置key
k.set(line);
// 5 写出数据
context.write(k, NullWritable.get());
}
// 2 解析日志
private boolean parseLog(String line, Context context) {
// 1 截取
String[] fields = line.split(" "); // 2 日志长度大于11的为合法
if (fields.length > ) {
// 系统计数器
context.getCounter("map", "true").increment();
return true;
}else {
context.getCounter("map", "false").increment();
return false;
}
}
}
（2）编写LogDriver
package com.xyg.mapreduce.weblog; import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.NullWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat; public class LogDriver { public static void main(String[] args) throws Exception {
args = new String[] { "e:/inputlog", "e:/output1" };
// 1 获取job信息
Configuration conf = new Configuration();
Job job = Job.getInstance(conf);
// 2 加载jar包
job.setJarByClass(LogDriver.class);
// 3 关联map
job.setMapperClass(LogMapper.class);
// 4 设置最终输出类型
job.setOutputKeyClass(Text.class);
job.setOutputValueClass(NullWritable.class);
// 5 设置输入和输出路径
FileInputFormat.setInputPaths(job, new Path(args[]));
FileOutputFormat.setOutputPath(job, new Path(args[]));
// 6 提交
job.waitForCompletion(true);
}
}
二. 复杂解析版
1）需求
对web访问日志中的各字段识别切分
去除日志中不合法的记录
根据统计需求，生成各类访问请求过滤数据
2）输入数据
194.237.142.21 - - [/Sep/::: +] "GET /wp-content/uploads/2013/07/rstudio-git3.png HTTP/1.1" "-" "Mozilla/4.0 (compatible;)"
183.49.46.228 - - [/Sep/::: +] "-" "-" "-"
163.177.71.12 - - [/Sep/::: +] "HEAD / HTTP/1.1" "-" "DNSPod-Monitor/1.0"
163.177.71.12 - - [/Sep/::: +] "HEAD / HTTP/1.1" "-" "DNSPod-Monitor/1.0"
101.226.68.137 - - [/Sep/::: +] "HEAD / HTTP/1.1" "-" "DNSPod-Monitor/1.0"
101.226.68.137 - - [/Sep/::: +] "HEAD / HTTP/1.1" "-" "DNSPod-Monitor/1.0"
60.208.6.156 - - [/Sep/::: +] "GET /wp-content/uploads/2013/07/rcassandra.png HTTP/1.0" "http://cos.name/category/software/packages/" "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/29.0.1547.66 Safari/537.36"
222.68.172.190 - - [/Sep/::: +] "GET /images/my.jpg HTTP/1.1" "http://www.angularjs.cn/A00n" "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/29.0.1547.66 Safari/537.36"
222.68.172.190 - - [/Sep/::: +] "-" "-" "-"
183.195.232.138 - - [/Sep/::: +] "HEAD / HTTP/1.1" "-" "DNSPod-Monitor/1.0"
183.195.232.138 - - [/Sep/::: +] "HEAD / HTTP/1.1" "-" "DNSPod-Monitor/1.0"
66.249.66.84 - - [/Sep/::: +] "GET /page/6/ HTTP/1.1" "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"
221.130.41.168 - - [/Sep/::: +] "GET /feed/ HTTP/1.1" "-" "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/29.0.1547.66 Safari/537.36"
157.55.35.40 - - [/Sep/::: +] "GET /robots.txt HTTP/1.1" "-" "Mozilla/5.0 (compatible; bingbot/2.0; +http://www.bing.com/bingbot.htm)"
50.116.27.194 - - [/Sep/::: +] "POST /wp-cron.php?doing_wp_cron=1379487095.2510800361633300781250 HTTP/1.0" "-" "WordPress/3.6; http://blog.fens.me"
58.215.204.118 - - [/Sep/::: +] "GET /nodejs-socketio-chat/ HTTP/1.1" "http://www.google.com/url?sa=t&rct=j&q=nodejs%20%E5%BC%82%E6%AD%A5%E5%B9%BF%E6%92%AD&source=web&cd=1&cad=rja&ved=0CCgQFjAA&url=%68%74%74%70%3a%2f%2f%62%6c%6f%67%2e%66%65%6e%73%2e%6d%65%2f%6e%6f%64%65%6a%73%2d%73%6f%63%6b%65%74%69%6f%2d%63%68%61%74%2f&ei=rko5UrylAefOiAe7_IGQBw&usg=AFQjCNG6YWoZsJ_bSj8kTnMHcH51hYQkAA&bvm=bv.52288139,d.aGc" "Mozilla/5.0 (Windows NT 5.1; rv:23.0) Gecko/20100101 Firefox/23.0"
58.215.204.118 - - [/Sep/::: +] "GET /wp-includes/js/jquery/jquery-migrate.min.js?ver=1.2.1 HTTP/1.1" "http://blog.fens.me/nodejs-socketio-chat/" "Mozilla/5.0 (Windows NT 5.1; rv:23.0) Gecko/20100101 Firefox/23.0"
58.215.204.118 - - [/Sep/::: +] "GET /wp-includes/js/jquery/jquery.js?ver=1.10.2 HTTP/1.1" "http://blog.fens.me/nodejs-socketio-chat/" "Mozilla/5.0 (Windows NT 5.1; rv:23.0) Gecko/20100101 Firefox/23.0"
58.215.204.118 - - [/Sep/::: +] "GET /wp-includes/js/comment-reply.min.js?ver=3.6 HTTP/1.1" "http://blog.fens.me/nodejs-socketio-chat/" "Mozilla/5.0 (Windows NT 5.1; rv:23.0) Gecko/20100101 Firefox/23.0"
58.215.204.118 - - [/Sep/::: +] "GET /wp-content/uploads/2013/08/chat.png HTTP/1.1" "http://blog.fens.me/nodejs-socketio-chat/" "Mozilla/5.0 (Windows NT 5.1; rv:23.0) Gecko/20100101 Firefox/23.0"
58.215.204.118 - - [/Sep/::: +] "GET /wp-content/uploads/2013/08/chat2.png HTTP/1.1" "http://blog.fens.me/nodejs-socketio-chat/" "Mozilla/5.0 (Windows NT 5.1; rv:23.0) Gecko/20100101 Firefox/23.0"
58.215.204.118 - - [/Sep/::: +] "GET /wp-content/uploads/2013/08/socketio.png HTTP/1.1" "http://blog.fens.me/nodejs-socketio-chat/" "Mozilla/5.0 (Windows NT 5.1; rv:23.0) Gecko/20100101 Firefox/23.0"
58.248.178.212 - - [/Sep/::: +] "GET /nodejs-grunt-intro/ HTTP/1.1" "http://blog.fens.me/series-nodejs/" "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.04506.30; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; MDDR; InfoPath.2; .NET4.0C)"
58.248.178.212 - - [/Sep/::: +] "GET /wp-includes/js/jquery/jquery-migrate.min.js?ver=1.2.1 HTTP/1.1" "http://blog.fens.me/nodejs-grunt-intro/" "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.04506.30; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; MDDR; InfoPath.2; .NET4.0C)"
3）实现代码
（1）定义一个bean，用来记录日志数据中的各数据字段
package com.xyg.mapreduce.log;
public class LogBean {
private String remote_addr;// 记录客户端的ip地址
private String remote_user;// 记录客户端用户名称,忽略属性"-"
private String time_local;// 记录访问时间与时区
private String request;// 记录请求的url与http协议
private String status;// 记录请求状态；成功是200
private String body_bytes_sent;// 记录发送给客户端文件主体内容大小
private String http_referer;// 用来记录从那个页面链接访问过来的
private String http_user_agent;// 记录客户浏览器的相关信息
private boolean valid = true;// 判断数据是否合法
public String getRemote_addr() {
return remote_addr;
}
public void setRemote_addr(String remote_addr) {
this.remote_addr = remote_addr;
}
public String getRemote_user() {
return remote_user;
}
public void setRemote_user(String remote_user) {
this.remote_user = remote_user;
}
public String getTime_local() {
return time_local;
}
public void setTime_local(String time_local) {
this.time_local = time_local;
}
public String getRequest() {
return request;
}
public void setRequest(String request) {
this.request = request;
}
public String getStatus() {
return status;
}
public void setStatus(String status) {
this.status = status;
}
public String getBody_bytes_sent() {
return body_bytes_sent;
}
public void setBody_bytes_sent(String body_bytes_sent) {
this.body_bytes_sent = body_bytes_sent;
}
public String getHttp_referer() {
return http_referer;
}
public void setHttp_referer(String http_referer) {
this.http_referer = http_referer;
}
public String getHttp_user_agent() {
return http_user_agent;
}
public void setHttp_user_agent(String http_user_agent) {
this.http_user_agent = http_user_agent;
}
public boolean isValid() {
return valid;
}
public void setValid(boolean valid) {
this.valid = valid;
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder();
sb.append(this.valid);
sb.append("\001").append(this.remote_addr);
sb.append("\001").append(this.remote_user);
sb.append("\001").append(this.time_local);
sb.append("\001").append(this.request);
sb.append("\001").append(this.status);
sb.append("\001").append(this.body_bytes_sent);
sb.append("\001").append(this.http_referer);
sb.append("\001").append(this.http_user_agent);
return sb.toString();
}
}
（2）编写LogMapper程序
package com.xyg.mapreduce.log;
import java.io.IOException;
import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.io.NullWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Mapper; public class LogMapper extends Mapper<LongWritable, Text, Text, NullWritable>{
Text k = new Text(); @Override
protected void map(LongWritable key, Text value, Context context)
throws IOException, InterruptedException {
// 1 获取1行
String line = value.toString();
// 2 解析日志是否合法
LogBean bean = pressLog(line);
if (!bean.isValid()) {
return;
}
k.set(bean.toString());
// 3 输出
context.write(k, NullWritable.get());
} // 解析日志
private LogBean pressLog(String line) {
LogBean logBean = new LogBean();
// 1 截取
String[] fields = line.split(" ");
if (fields.length > ) {
// 2封装数据
logBean.setRemote_addr(fields[]);
logBean.setRemote_user(fields[]);
logBean.setTime_local(fields[].substring());
logBean.setRequest(fields[]);
logBean.setStatus(fields[]);
logBean.setBody_bytes_sent(fields[]);
logBean.setHttp_referer(fields[]); if (fields.length > ) {
logBean.setHttp_user_agent(fields[] + " "+ fields[]);
}else {
logBean.setHttp_user_agent(fields[]);
}
// 大于400，HTTP错误
if (Integer.parseInt(logBean.getStatus()) >= ) {
logBean.setValid(false);
}
}else {
logBean.setValid(false);
}
return logBean;
}
}
（3）编写LogDriver程序
package com.xyg.mapreduce.log;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.NullWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat; public class LogDriver {
public static void main(String[] args) throws Exception {
// 1 获取job信息
Configuration conf = new Configuration();
Job job = Job.getInstance(conf);
// 2 加载jar包
job.setJarByClass(LogDriver.class);
// 3 关联map
job.setMapperClass(LogMapper.class);
// 4 设置最终输出类型
job.setOutputKeyClass(Text.class);
job.setOutputValueClass(NullWritable.class);
// 5 设置输入和输出路径
FileInputFormat.setInputPaths(job, new Path(args[]));
FileOutputFormat.setOutputPath(job, new Path(args[]));
// 6 提交
job.waitForCompletion(true);
}
}
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