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。
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
然后，就可以继续了。（这是针对bin方式来安装）
更多安装方法，请见
Ubuntu14.04下完美安装cloudermanage多种方式（图文详解）（博主推荐）
也许，你在卸载中，会遇到如下问题
Clouder Manager安装时出现please remove the following file: /etc/cloudera-scm-server/db.properties问题解决（图文详解）
最后成功！
