说在前面的话

　　我的机器是总共4台，分别为ubuntucmbigdata1、ubuntucmbigdata2、ubuntucmbigdata3和ubuntucmbigdata4。（注意啦，以下是针对Ubuntu系统的）

　　在ubuntucmbigdata1上执行了

sudo apt-get install cloudera-manager-daemons  cloudera-manager-server sudo apt-get install cloudera-manager-daemons  cloudera-manager-agent

　　即，ubuntucmbigdata1是既做server，又做agent。

　　在ubuntucmbigdata2、ubuntucmbigdata3和ubuntucmbigdata4上执行了

sudo apt-get install cloudera-manager-daemons  cloudera-manager-agent

　　即，ubuntucmbigdata2、3、和4是只做agent。

　　在ubuntucmbigdata1、ubuntucmbigdata2、ubuntucmbigdata3、ubuntucmbigdata4上

新建文件sudo vi /etc/apt/sources.list.d/cloudera-manager.list，复制以下内容到cloudera.list里

# Packages for Cloudera Manager, Version 5, on Ubuntu 14.04 x86_64
deb [arch=amd64] http://archive.cloudera.com/cm5/ubuntu/trusty/amd64/cm trusty-cm5 contrib
deb-src http://archive.cloudera.com/cm5/ubuntu/trusty/amd64/cm trusty-cm5 contrib

　　并且在在ubuntucmbigdata1、ubuntucmbigdata2、ubuntucmbigdata3、ubuntucmbigdata4上

　　向apt添加cloudera源公钥，在所有节点执行如下命令：

curl -s http://archive.cloudera.com/cm5/ubuntu/trusty/amd64/cm/archive.key | sudo apt-key add -

然后，再

sudo apt-get update

　　问题详情

解决办法

　　思路1：

Starting cloudera-scm-server: * Couldn't start cloudera-scm-server的解决办法（图文详解）

　　思路2：

　　查看cloudera-scm-agent的运行日志

bigdata@ubuntucmbigdata1:/opt/cm-5.6.0/log$ ll
total 20
drwxr-xr-x 5 bigdata bigdata 4096  2月 12  2016 ./
drwxr-xr-x 8 bigdata bigdata 4096  2月 12  2016 ../
drwxr-xr-x 2 bigdata bigdata 4096  6月 25 19:53 cloudera-scm-agent/
drwxr-xr-x 2 bigdata bigdata 4096  6月 25 19:52 cloudera-scm-server/
drwxr-xr-x 2 bigdata bigdata 4096  2月 12  2016 cmf/
bigdata@ubuntucmbigdata1:/opt/cm-5.6.0/log$ cd cloudera-scm-agent/
bigdata@ubuntucmbigdata1:/opt/cm-5.6.0/log/cloudera-scm-agent$ ll
total 40
drwxr-xr-x 2 bigdata bigdata  4096  6月 25 19:53 ./
drwxr-xr-x 5 bigdata bigdata  4096  2月 12  2016 ../
-rw-r--r-- 1 root    root    14757  6月 25 19:57 cloudera-scm-agent.log
-rw-r--r-- 1 root    root      935  6月 25 19:53 cloudera-scm-agent.out
-rw-r--r-- 1 root    root      202  6月 25 19:53 cmf_listener.log
-rw-r--r-- 1 root    root      539  6月 25 19:53 supervisord.log
-rw-r--r-- 1 root    root      449  6月 25 19:53 supervisord.out
bigdata@ubuntucmbigdata1:/opt/cm-5.6.0/log/cloudera-scm-agent$ cat cloudera-scm-agent.out 
[25/Jun/2017 19:53:01 +0000] 9651 MainThread agent        INFO     SCM Agent Version: 5.6.0
[25/Jun/2017 19:53:01 +0000] 9651 MainThread util         INFO     Generating Agent UUID for the first time: '/opt/cm-5.6.0/lib/cloudera-scm-agent/uuid'
[25/Jun/2017 19:53:01 +0000] 9651 MainThread agent        INFO     Adding env vars that start with CMF_AGENT_
[25/Jun/2017 19:53:01 +0000] 9651 MainThread agent        INFO     explicitly passing env var to supervisee: MGMT_HOME: /opt/cm-5.6.0/share/cmf
[25/Jun/2017 19:53:01 +0000] 9651 MainThread agent        INFO     explicitly passing env var to supervisee: ROOT: /opt/cm-5.6.0/lib/cmf
[25/Jun/2017 19:53:01 +0000] 9651 MainThread agent        INFO     Logging to /opt/cm-5.6.0/log/cloudera-scm-agent/cloudera-scm-agent.log
Error: could not find config file /opt/cm-5.6.0/run/cloudera-scm-agent/supervisor/supervisord.conf
For help, use /opt/cm-5.6.0/lib/cmf/agent/src/cmf/agent.py -h
bigdata@ubuntucmbigdata1:/opt/cm-5.6.0/log/cloudera-scm-agent$

　　当cloudera-scm-server、cloudera-scm-agent start启动成功之后，可通过http://主节点IP:7180来访问CM，用户名密码都为admin。剩下的就是一直点下一步和根据具体的需求来配置集群了。

　注意，在此之前。

　　ubuntucmbigdata1机器上，则需要执行

bigdata@ubuntucmbigdata1:~$ sudo /usr/share/cmf/schema/scm_prepare_database.sh mysql scm scm scm_password[sudo] password for bigdata: 
Sorry, try again.
[sudo] password for bigdata: 
JAVA_HOME=/usr/java/jdk1.7.0_80
Verifying that we can write to /etc/cloudera-scm-server
Creating SCM configuration file in /etc/cloudera-scm-server
Executing:  /usr/java/jdk1.7.0_80/bin/java -cp /usr/share/java/mysql-connector-java.jar:/usr/share/java/oracle-connector-java.jar:/usr/share/cmf/schema/../lib/* com.cloudera.enterprise.dbutil.DbCommandExecutor /etc/cloudera-scm-server/db.properties com.cloudera.cmf.db.
[                          main] DbCommandExecutor              INFO  Successfully connected to database.
All done, your SCM database is configured correctly!

bigdata@ubuntucmbigdata1:~$ sudo service cloudera-scm-server start
[sudo] password for bigdata:
Starting cloudera-scm-server: * cloudera-scm-server started

bigdata@ubuntucmbigdata1:~$

bigdata@ubuntucmbigdata1:~$ sudo service cloudera-scm-agent start
[sudo] password for bigdata:
Starting cloudera-scm-agent: * cloudera-scm-agent started

bigdata@ubuntucmbigdata1:~$

　　然后，在ubuntucmbigdata2、ubuntucmbigdata3、ubuntucmbigdata4上

bigdata@ubuntucmbigdata2:~$ sudo service cloudera-scm-agent start
[sudo] password for bigdata:
Starting cloudera-scm-agent: * cloudera-scm-agent started

bigdata@ubuntucmbigdata2:~$

bigdata@ubuntucmbigdata3:~$ sudo service cloudera-scm-agent start
[sudo] password for bigdata:
Starting cloudera-scm-agent: * cloudera-scm-agent started

bigdata@ubuntucmbigdata3:~$

bigdata@ubuntucmbigdata4:~$ sudo service cloudera-scm-agent start
[sudo] password for bigdata:
Starting cloudera-scm-agent: * cloudera-scm-agent started

bigdata@ubuntucmbigdata4:~$

　　思路3：

　　关闭这台机器的防火墙

bigdata@ubuntucmbigdata1:/opt$ sudo ufw disable
Firewall stopped and disabled on system startup
bigdata@ubuntucmbigdata1:/opt$ sudo ufw status
Status: inactive
bigdata@ubuntucmbigdata1:/opt$

　　思路4：

bigdata@ubuntucmbigdata1:/opt/cm-5.6.0/etc$ netstat -nltp
(No info could be read for "-p": geteuid()=1000 but you should be root.)
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN      -               
tcp        0      0 127.0.0.1:631           0.0.0.0:*               LISTEN      -               
tcp        0      0 127.0.0.1:19001         0.0.0.0:*               LISTEN      -               
tcp        0      0 127.0.0.1:6010          0.0.0.0:*               LISTEN      -               
tcp        0      0 127.0.0.1:6011          0.0.0.0:*               LISTEN      -               
tcp        0      0 127.0.0.1:6012          0.0.0.0:*               LISTEN      -               
tcp        0      0 127.0.1.1:9000          0.0.0.0:*               LISTEN      -               
tcp        0      0 127.0.0.1:3306          0.0.0.0:*               LISTEN      -               
tcp6       0      0 :::22                   :::*                    LISTEN      -               
tcp6       0      0 ::1:631                 :::*                    LISTEN      -               
tcp6       0      0 ::1:6010                :::*                    LISTEN      -               
tcp6       0      0 ::1:6011                :::*                    LISTEN      -               
tcp6       0      0 ::1:6012                :::*                    LISTEN      -

　　　　思路5：

cloudera-scm-server启动时出现Caused by: javax.persistence.PersistenceException: org.hibernate.exception.GenericJDBCException: Could not open connection问题解决方法（图文详解）

　　　思路6：

　　　　时间同步

ntpdate pool.ntp.org

　　一般前面的6种思路是一定可以解决cloudera manager的7180 web界面访问不了

　　思路7：（万不得已）

　　最戳的办法，就是

http://www.aboutyun.com/thread-8992-1-1.html （包含centos、ubuntu、debian和rehat各版本都有）

　　卸载它，重新来过。

正用得上，刚安装好的CDH5的CM server启不来，只好全部四节点卸载来过。

　　如在ubuntu系统下

bigdata@ubuntucmbigdata1:/opt/softwares/cm-5.6.0$ sudo rm -Rf /usr/share/cmf /var/lib/cloudera* /var/cache/yum/cloudera*
bigdata@ubuntucmbigdata1:/opt/softwares/cm-5.6.0$ sudo apt-get purge 'cloudera-manager-*'
bigdata@ubuntucmbigdata1:/opt/softwares/cm-5.6.0$ sudo apt-get purge 'cloudera-manager-*' avro-tools crunch flume-ng hadoop-hdfs-fuse hadoop-hdfs-nfs3 hadoop-httpfs hbase-solr hive-hbase hive-webhcat hue-beeswax hue-hbase hue-impala hue-pig hue-plugins hue-rdbms hue-search hue-spark hue-sqoop hue-zookeeper impala impala-shell kite llama mahout oozie pig pig-udf-datafu search sentry solr-mapreduce spark-python sqoop sqoop2 whirr


bigdata@ubuntucmbigdata1:/opt/softwares/cm-5.6.0$ sudo apt-get clean
bigdata@ubuntucmbigdata1:/opt/softwares/cm-5.6.0$ sudo rm -Rf /usr/share/cmf /var/lib/cloudera* /var/cache/yum/cloudera* /var/log/cloudera* /var/run/cloudera*
bigdata@ubuntucmbigdata1:/opt/softwares/cm-5.6.0$ sudo rm -Rf /var/cache/apt/archives/cloudera*

　　再进一步卸载彻底干净

　　见

Cloudera Manager卸载笔记

1、通过管理平台分别停止组件服务和Cloudera Management Service2、通过管理平台注销并移除Parcles （在控制台注销并移除，无论是安装的Parcles还是未安装的Parcles）3、停止后台服务sudo service cloudera-scm-agent stopsudo service cloudera-scm-server stop    sudo service cloudera-scm-server-db stopsudo service mysqld stop4、卸载Cloudera Manager Server执行命令：sudo /usr/share/cmf/uninstall-cloudera-manager.sh5、清理配置和缓存信息在所有agent上执行：sudo umount -v /var/run/cloudera-scm-agent/process在所有主机上执行：sudo rm -rf /usr/share/cmf;sudo rm -rf /var/lib/cloudera*;sudo rm -rf  /var/cache/yum/x86_64/6/cloudera*;sudo rm -rf  /var/log/cloudera*;sudo rm -rf  /var/run/cloudera*  /etc/cloudera* 6、卸载rpm安装包1）查看 rpm -qa | grep cloudera2）卸载 for f in `rpm -qa | grep cloudera `  ; do sudo rpm -e ${f} ; done7、清理安装文件sudo rm -rf /var/lib/hadoop-* /var/lib/impala /var/lib/solr /var/lib/zookeeper /var/lib/hue /var/lib/oozie  /var/lib/pgsql  /var/lib/sqoop2  /data/dfs/  /data/impala/ /data/yarn/  /dfs/ /impala/ /yarn/  /var/run/hadoop-*/ /var/run/hdfs-*/ /usr/bin/hadoop* /usr/bin/zookeeper* /usr/bin/hbase* /usr/bin/hive* /usr/bin/hdfs /usr/bin/mapred /usr/bin/yarn /usr/bin/sqoop* /usr/bin/oozie /etc/hadoop* /etc/zookeeper* /etc/hive* /etc/hue /etc/impala /etc/sqoop* /etc/oozie /etc/hbase* /etc/hcatalog 略过其它软件，只删除hadoop相关sudo rm -rf ` find /var/lib/alternatives/* ! -name "mta" ! -name "print" ! -name "zlibrary-ui"  -mtime -3` 8、如果有hadoop先关进程还在，则杀死for u in hdfs mapred cloudera-scm hbase hue zookeeper oozie hive impala flume; do sudo kill $(ps -u $u -o pid=); done9、清理parcelsudo rm -rf /opt/cloudera/parcel-cache /opt/cloudera/parcels10、清理组件用户sudo userdel hue;sudo userdel impala;sudo userdel spark;sudo userdel sentry;sudo userdel sqoop2;sudo userdel hbase;sudo userdel oozie;sudo userdel yarn;sudo userdel mapred;sudo userdel zookeeper;sudo userdel httpfs;sudo userdel solr;sudo userdel kms;sudo userdel hive;sudo userdel flume;sudo userdel hdfs;sudo userdel sqoop;sudo userdel llama;sudo userdel cloudera-scm;sudo userdel postgres;

　　然后，就可以继续了。（这是针对bin方式来安装）