报错1

rpm -ivh cloudera-manager-server-db-2-7.1.4-6363010.el7.x86_64.rpm 
警告：cloudera-manager-server-db-2-7.1.4-6363010.el7.x86_64.rpm: 头V3 RSA/SHA256 Signature, 密钥 ID b0b19c9f: NOKEY
错误：依赖检测失败：
	postgresql10-server >= 10 被 cloudera-manager-server-db-2-7.1.4-6363010.el7.x86_64 需要

解决

下载低版本，然后到官网https://yum.postgresql.org/10/redhat/rhel-7-x86_64/repoview/postgresqldbserver10.group.html下载10版本的rpm包，需要下载3个包

postgresql10-10.15-1PGDG.rhel7.x86_64.rpm
postgresql10-libs-10.15-1PGDG.rhel7.x86_64.rpm
postgresql10-server-10.15-1PGDG.rhel7.x86_64.rpm

下载旧版本

rpm -e --nodeps `rpm -qa|grep postgres`

安装新版本
安装依赖

yum -y install libicu

安装10 版本postgresql

rpm -ivh postgresql10-libs-10.15-1PGDG.rhel7.x86_64.rpm
rpm -ivh postgresql10-10.15-1PGDG.rhel7.x86_64.rpm
rpm -ivh postgresql10-server-10.15-1PGDG.rhel7.x86_64.rpm

安装cloudera-manager-server-db

rpm -ivh cloudera-manager-server-db-2-7.1.4-6363010.el7.x86_64.rpm 
警告：cloudera-manager-server-db-2-7.1.4-6363010.el7.x86_64.rpm: 头V3 RSA/SHA256 Signature, 密钥 ID b0b19c9f: NOKEY
准备中...                          ################################# [100%]
正在升级/安装...
   1:cloudera-manager-server-db-2-7.1.################################# [100%]

报错2

rpm -ivh cloudera-manager-agent-7.1.4-6363010.el7.x86_64.rpm 
警告：cloudera-manager-agent-7.1.4-6363010.el7.x86_64.rpm: 头V3 RSA/SHA256 Signature, 密钥 ID b0b19c9f: NOKEY
错误：依赖检测失败：
	bind-utils 被 cloudera-manager-agent-7.1.4-6363010.el7.x86_64 需要
	httpd 被 cloudera-manager-agent-7.1.4-6363010.el7.x86_64 需要
	mod_ssl 被 cloudera-manager-agent-7.1.4-6363010.el7.x86_64 需要
	openssl-devel 被 cloudera-manager-agent-7.1.4-6363010.el7.x86_64 需要
	python-psycopg2 <= 2.8.3 被 cloudera-manager-agent-7.1.4-6363010.el7.x86_64 需要
	MySQL-python 被 cloudera-manager-agent-7.1.4-6363010.el7.x86_64 需要

解决

安装依赖

yum -y install bind-utils httpd mod_ssl openssl-devel python-psycopg2 MySQL-python

继续安装

rpm -ivh cloudera-manager-agent-7.1.4-6363010.el7.x86_64.rpm 
警告：cloudera-manager-agent-7.1.4-6363010.el7.x86_64.rpm: 头V3 RSA/SHA256 Signature, 密钥 ID b0b19c9f: NOKEY
准备中...                          ################################# [100%]
正在升级/安装...
   1:cloudera-manager-agent-7.1.4-6363################################# [100%]
Created symlink from /etc/systemd/system/multi-user.target.wants/cloudera-scm-agent.service to /usr/lib/systemd/system/cloudera-scm-agent.service.
Created symlink from /etc/systemd/system/multi-user.target.wants/cloudera-scm-supervisord.service to /usr/lib/systemd/system/cloudera-scm-supervisord.service.

报错3

请求 Host Monitor 超时。这可能会导致页面响应缓慢。

解决

改Monitor服务配置

这个内存根据推荐值调整，然后重启服务，在web界面操作，具体操作步骤不再赘述。

报错4

hdfs报无法创建/tmp/

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解决

sudo -u hdfs hdfs dfsadmin -safemode leave