手把手教你通过Ambari新建Hadoop集群图解案例
作者：尹正杰
版权声明：原创作品，谢绝转载！否则将追究法律责任。
登陆系统之后，会看到Ambari空空如也的欢迎界面，接下来我们就需要介绍如何通过Ambari新建Hadoop集群。关于如何部署Ambari是很简单的，我这里就不啰嗦了，感兴趣的小伙伴可以参考我之前的笔记：。
1>.登陆Ambari的界面
2>.点击“Launc Install Wizard”按钮进入新建集群向导
3>.自定义集群名称
4>.使用本地的yum仓库（需要选择“Use Local Repository”，我这里默认就使用的这个选项。） 
5>.在redhat7按照上图输入本地源的路径后，点击下一步
6>.将私钥上传到Ambari到管理控制台上（这个步骤应该是你在部署Ambari服务到时候就已经生成过私钥啦！）
7>.注册服务器时拍错处理（附有解决问题的详细过程）
下图正在安装软件：
注册服务器，如下图：
在上面的那个过程如果你卡顿的时间比较长的话，估计会失败，如下图：
查看错误日志，如下图：
根据上面的报错信息，大家都知道是没有这个目录，才会报这个错误。可能是Ambari公司的开发人员在对这个目录进行判断时逻辑出现问题了，如果这个目录不存在他们并没有自动创建，
解决方案：
因此我们需要登陆对应的服务器手动将这个目录创建出来即可。
我们看报错一定要看全，我们需要把进度条往下拉，看是否还有其他的报错，你会发现有以下报错：
如上图所示，报错“SSLError: Failed to connect. Please check openssl library versions. ”，根据报错提示，说是我的openssl的版本有问题。百度一下原因，说有可能是openssl版本不匹配，因为python 2.7.5有的版本（或更高版本）增加了certificate verification，正是因为这个特性导致ambari-agent无法连接server。（呵呵～是不是感觉跟没说一样！）
解决步骤
既然他说我的版本有问题，那我就先看卡自己的openssl到底是啥版本
[root@node101 ~]# rpm -qa | grep openssl openssl-libs-1.0.2k-16.el7.x86_64openssl-1.0.2k-16.el7.x86_64[root@node101 ~]#
好，接下里，咱们就说干就干，开始升级版本：
[root@node101 ~]# yum update openssl Loaded plugins: fastestmirror, prioritiesambari-2.6.0.0 | 2.9 kB 00:00:00 Loading mirror speeds from cached hostfile * base: mirrors.aliyun.com * extras: mirrors.tuna.tsinghua.edu.cn * updates: mirrors.tuna.tsinghua.edu.cn17 packages excluded due to repository priority protectionsNo packages marked for update[root@node101 ~]#
根据上面的提示，说没有可以更新的安装包对于我服务器而言，因此我得像个方法，让他可以支持更新，那就得重新更换yum源了。
[root@node101 ~]# mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.`date +%F` #先备份一份yum源[root@node101 ~]# [root@node101 ~]# wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo--2018-12-06 17:01:48-- http://mirrors.aliyun.com/repo/Centos-7.repoResolving mirrors.aliyun.com (mirrors.aliyun.com)... 42.81.12.221, 42.81.12.217, 42.81.12.218, ...Connecting to mirrors.aliyun.com (mirrors.aliyun.com)|42.81.12.221|:80... connected.HTTP request sent, awaiting response... 200 OKLength: 2523 (2.5K) [application/octet-stream]Saving to: ‘/etc/yum.repos.d/CentOS-Base.repo’100%[===========================================================================>] 2,523 --.-K/s in 0.001s 2018-12-06 17:01:48 (2.68 MB/s) - ‘/etc/yum.repos.d/CentOS-Base.repo’ saved [2523/2523][root@node101 ~]#
[root@node101 ~]# yum clean allLoaded plugins: fastestmirror, prioritiesCleaning repos: HDP-2.6.3.0 HDP-UTILS-1.1.0.21 ambari-2.6.0.0 base extras updatesCleaning up list of fastest mirrors[root@node101 ~]#
[root@node101 ~]# yum makecacheLoaded plugins: fastestmirror, prioritiesHDP-2.6.3.0 | 2.9 kB 00:00:00 HDP-UTILS-1.1.0.21 | 2.9 kB 00:00:00 ambari-2.6.0.0 | 2.9 kB 00:00:00 base | 3.6 kB 00:00:00 extras | 3.4 kB 00:00:00 updates | 3.4 kB 00:00:00 (1/21): HDP-2.6.3.0/filelists_db | 418 kB 00:00:00 (2/21): HDP-2.6.3.0/primary_db | 100 kB 00:00:00 (3/21): HDP-2.6.3.0/other_db | 14 kB 00:00:00 (4/21): HDP-UTILS-1.1.0.21/filelists_db | 95 kB 00:00:00 (5/21): HDP-UTILS-1.1.0.21/other_db | 20 kB 00:00:00 (6/21): HDP-UTILS-1.1.0.21/primary_db | 38 kB 00:00:00 (7/21): ambari-2.6.0.0/filelists_db | 167 kB 00:00:00 (8/21): ambari-2.6.0.0/other_db | 1.3 kB 00:00:00 (9/21): ambari-2.6.0.0/primary_db | 8.6 kB 00:00:00 (10/21): base/7/x86_64/group_gz | 166 kB 00:00:00 (11/21): base/7/x86_64/filelists_db | 7.1 MB 00:00:11 (12/21): extras/7/x86_64/prestodelta | 33 kB 00:00:00 (13/21): extras/7/x86_64/filelists_db | 330 kB 00:00:00 (14/21): extras/7/x86_64/other_db | 106 kB 00:00:01 (15/21): updates/7/x86_64/prestodelta | 173 kB 00:00:00 (16/21): updates/7/x86_64/filelists_db | 1.3 MB 00:00:02 (17/21): extras/7/x86_64/primary_db | 153 kB 00:00:03 (18/21): updates/7/x86_64/other_db | 182 kB 00:00:01 (19/21): updates/7/x86_64/primary_db | 1.3 MB 00:00:02 (20/21): base/7/x86_64/other_db | 2.6 MB 00:00:07 (21/21): base/7/x86_64/primary_db | 6.0 MB 00:00:21 Determining fastest mirrors * base: mirrors.aliyun.com * extras: mirrors.aliyun.com * updates: mirrors.aliyun.comMetadata Cache Created[root@node101 ~]#
[root@node101 ~]# yum -y update......(内容太多了我就懒得复制了~) libdrm.x86_64 0:2.4.91-3.el7 libffi.x86_64 0:3.0.13-18.el7 libgcc.x86_64 0:4.8.5-36.el7 libgcrypt.x86_64 0:1.5.3-14.el7 libgomp.x86_64 0:4.8.5-36.el7 libgudev1.x86_64 0:219-62.el7 libmount.x86_64 0:2.23.2-59.el7 libndp.x86_64 0:1.2-7.el7 libnetfilter_conntrack.x86_64 0:1.0.6-1.el7_3 libnl3.x86_64 0:3.2.28-4.el7 libpcap.x86_64 14:1.5.3-11.el7 libpciaccess.x86_64 0:0.14-1.el7 libproxy.x86_64 0:0.4.11-11.el7 libpwquality.x86_64 0:1.2.3-5.el7 libselinux.x86_64 0:2.5-14.1.el7 libselinux-python.x86_64 0:2.5-14.1.el7 libselinux-utils.x86_64 0:2.5-14.1.el7 libsemanage.x86_64 0:2.5-14.el7 libsepol.x86_64 0:2.5-10.el7 libsoup.x86_64 0:2.62.2-2.el7 libss.x86_64 0:1.42.9-13.el7 libssh2.x86_64 0:1.4.3-12.el7 libstdc++.x86_64 0:4.8.5-36.el7 libtasn1.x86_64 0:4.10-1.el7 libuser.x86_64 0:0.60-9.el7 libuuid.x86_64 0:2.23.2-59.el7 linux-firmware.noarch 0:20180911-69.git85c5d90.el7 logrotate.x86_64 0:3.8.6-17.el7 lsscsi.x86_64 0:0.27-6.el7 lua.x86_64 0:5.1.4-15.el7 lvm2.x86_64 7:2.02.180-10.el7_6.2 lvm2-libs.x86_64 7:2.02.180-10.el7_6.2 make.x86_64 1:3.82-23.el7 man-db.x86_64 0:2.6.3-11.el7 mariadb-libs.x86_64 1:5.5.60-1.el7_5 microcode_ctl.x86_64 2:2.1-47.el7 mozjs17.x86_64 0:17.0.0-20.el7 ncurses.x86_64 0:5.9-14.20130511.el7_4 ncurses-base.noarch 0:5.9-14.20130511.el7_4 ncurses-libs.x86_64 0:5.9-14.20130511.el7_4 net-tools.x86_64 0:2.0-0.24.20131004git.el7 nettle.x86_64 0:2.7.1-8.el7 nspr.x86_64 0:4.19.0-1.el7_5 nss.x86_64 0:3.36.0-7.el7_5 nss-softokn.x86_64 0:3.36.0-5.el7_5 nss-softokn-freebl.x86_64 0:3.36.0-5.el7_5 nss-sysinit.x86_64 0:3.36.0-7.el7_5 nss-tools.x86_64 0:3.36.0-7.el7_5 nss-util.x86_64 0:3.36.0-1.el7_5 numactl-libs.x86_64 0:2.0.9-7.el7 openldap.x86_64 0:2.4.44-20.el7 openssh.x86_64 0:7.4p1-16.el7 openssh-clients.x86_64 0:7.4p1-16.el7 openssh-server.x86_64 0:7.4p1-16.el7 os-prober.x86_64 0:1.58-9.el7 p11-kit.x86_64 0:0.23.5-3.el7 p11-kit-trust.x86_64 0:0.23.5-3.el7 pam.x86_64 0:1.1.8-22.el7 parted.x86_64 0:3.1-29.el7 pciutils-libs.x86_64 0:3.5.1-3.el7 pcre.x86_64 0:8.32-17.el7 perl.x86_64 4:5.16.3-293.el7 perl-Pod-Escapes.noarch 1:1.04-293.el7 perl-libs.x86_64 4:5.16.3-293.el7 perl-macros.x86_64 4:5.16.3-293.el7 pinentry.x86_64 0:0.8.1-17.el7 plymouth.x86_64 0:0.8.9-0.31.20140113.el7.centos plymouth-core-libs.x86_64 0:0.8.9-0.31.20140113.el7.centos plymouth-scripts.x86_64 0:0.8.9-0.31.20140113.el7.centos policycoreutils.x86_64 0:2.5-29.el7 polkit.x86_64 0:0.112-18.el7 postfix.x86_64 2:2.10.1-7.el7 procps-ng.x86_64 0:3.3.10-23.el7 python.x86_64 0:2.7.5-76.el7 python-libs.x86_64 0:2.7.5-76.el7 python-perf.x86_64 0:3.10.0-957.1.3.el7 python-pycurl.x86_64 0:7.19.0-19.el7 python-pyudev.noarch 0:0.15-9.el7 python-slip.noarch 0:0.4.0-4.el7 python-slip-dbus.noarch 0:0.4.0-4.el7 readline.x86_64 0:6.2-10.el7 rsyslog.x86_64 0:8.24.0-34.el7 selinux-policy.noarch 0:3.13.1-229.el7_6.6 selinux-policy-targeted.noarch 0:3.13.1-229.el7_6.6 setup.noarch 0:2.8.71-10.el7 shadow-utils.x86_64 2:4.1.5.1-25.el7 shared-mime-info.x86_64 0:1.8-4.el7 sudo.x86_64 0:1.8.23-3.el7 systemd.x86_64 0:219-62.el7 systemd-libs.x86_64 0:219-62.el7 systemd-sysv.x86_64 0:219-62.el7 tar.x86_64 2:1.26-35.el7 trousers.x86_64 0:0.3.14-2.el7 tuned.noarch 0:2.10.0-6.el7 tzdata.noarch 0:2018g-1.el7 util-linux.x86_64 0:2.23.2-59.el7 vim-minimal.x86_64 2:7.4.160-5.el7 virt-what.x86_64 0:1.18-4.el7 wpa_supplicant.x86_64 1:2.6-12.el7 xfsprogs.x86_64 0:4.5.0-18.el7 xz.x86_64 0:5.2.2-1.el7 xz-libs.x86_64 0:5.2.2-1.el7 yum-plugin-fastestmirror.noarch 0:1.1.31-50.el7 zlib.x86_64 0:1.2.7-18.el7 Replaced: NetworkManager.x86_64 1:1.0.6-27.el7 grub2.x86_64 1:2.02-0.29.el7.centos grub2-tools.x86_64 1:2.02-0.29.el7.centos pygobject3-base.x86_64 0:3.14.0-3.el7 Complete![root@node101 ~]#
[root@node101 ~]# yum update openssl Loaded plugins: fastestmirror, prioritiesLoading mirror speeds from cached hostfile * base: mirrors.aliyun.com * extras: mirrors.aliyun.com * updates: mirrors.aliyun.com17 packages excluded due to repository priority protectionsNo packages marked for update[root@node101 ~]#
问题依旧还是僵持着，参考社区版本链接：https://community.hortonworks.com/questions/145/openssl-error-upon-host-registration.html
修改/etc/python/cert-verification.cfg配置文件
[root@node101 ~]# cat /etc/python/cert-verification.cfg# Possible values are:# 'enable' to ensure HTTPS certificate verification is enabled by default# 'disable' to ensure HTTPS certificate verification is disabled by default# 'platform_default' to delegate the decision to the redistributor providing this particular Python version# For more info refer to https://www.python.org/dev/peps/pep-0493/[https]#verify=platform_default #这是我操作系统默认的设置，我将它的值改为“disable”，建议复制一行进行修改，这样你知道上修改前的属性值是多少，便于你恢复。verify=disable[root@node101 ~]#
修改/etc/ambari-agent/conf/ambari-agent.ini，在[security]添加下面内容：
[root@node101 ~]# cat /etc/ambari-agent/conf/ambari-agent.ini# Licensed to the Apache Software Foundation (ASF) under one or more# contributor license agreements. See the NOTICE file distributed with# this work for additional information regarding copyright ownership.# The ASF licenses this file to You under the Apache License, Version 2.0# (the "License"); you may not use this file except in compliance with# the License. You may obtain a copy of the License at## http://www.apache.org/licenses/LICENSE-2.0## Unless required by applicable law or agreed to in writing, software# distributed under the License is distributed on an "AS IS" BASIS,# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.# See the License for the specific[server]hostname=node101.yinzhengjie.org.cnurl_port=8440secured_url_port=8441connect_retry_delay=10max_reconnect_retry_delay=30[agent]logdir=/var/log/ambari-agentpiddir=/var/run/ambari-agentprefix=/var/lib/ambari-agent/data;loglevel=(DEBUG/INFO)loglevel=INFOdata_cleanup_interval=86400data_cleanup_max_age=2592000data_cleanup_max_size_MB = 100ping_port=8670cache_dir=/var/lib/ambari-agent/cachetolerate_download_failures=truerun_as_user=rootparallel_execution=0alert_grace_period=5status_command_timeout=5alert_kinit_timeout=14400000system_resource_overrides=/etc/resource_overrides; memory_threshold_soft_mb=400; memory_threshold_hard_mb=1000; ignore_mount_points=/mnt/custom1,/mnt/custom2[security]keysdir=/var/lib/ambari-agent/keysserver_crt=ca.crtpassphrase_env_var_name=AMBARI_PASSPHRASEssl_verify_cert=0credential_lib_dir=/var/lib/ambari-agent/cred/libcredential_conf_dir=/var/lib/ambari-agent/cred/confcredential_shell_cmd=org.apache.hadoop.security.alias.CredentialShellforce_https_protocol=PROTOCOL_TLSv1_2 #没错，我修改的就是它！[network]; this option apply only for Agent communicationuse_system_proxy_settings=true[services]pidLookupPath=/var/run/[heartbeat]state_interval_seconds=60dirs=/etc/hadoop,/etc/hadoop/conf,/etc/hbase,/etc/hcatalog,/etc/hive,/etc/oozie, /etc/sqoop, /var/run/hadoop,/var/run/zookeeper,/var/run/hbase,/var/run/templeton,/var/run/oozie, /var/log/hadoop,/var/log/zookeeper,/var/log/hbase,/var/run/templeton,/var/log/hive; 0 - unlimitedlog_lines_count=300idle_interval_min=1idle_interval_max=10[logging]syslog_enabled=0[root@node101 ~]#
修改上述的配置文件后，我们需要重启重启ambari-agent 服务：
[root@node101 ~]# xrsync.sh /etc/ambari-agent/conf/ambari-agent.ini =========== node102.yinzhengjie.org.cn : /etc/ambari-agent/conf/ambari-agent.ini ===========命令执行成功=========== node103.yinzhengjie.org.cn : /etc/ambari-agent/conf/ambari-agent.ini ===========命令执行成功[root@node101 ~]#
[root@node101 ~]# ambari-agent restartRestarting ambari-agentVerifying Python version compatibility...Using python /usr/bin/pythonFound ambari-agent PID: 5248Stopping ambari-agentRemoving PID file at /run/ambari-agent/ambari-agent.pidambari-agent successfully stoppedVerifying Python version compatibility...Using python /usr/bin/pythonChecking for previously running Ambari Agent...Checking ambari-common dir...Starting ambari-agentVerifying ambari-agent process status...Ambari Agent successfully startedAgent PID at: /run/ambari-agent/ambari-agent.pidAgent out at: /var/log/ambari-agent/ambari-agent.outAgent log at: /var/log/ambari-agent/ambari-agent.log[root@node101 ~]#
Duang～，你会发现服务器注册成功啦～问题得到解决：（看来HDP社区版的论坛的确是有不少大佬啊～哈哈哈）
8>.进入服务选择页面，自定义需要安装的服务
9>.自定义需要安装的服务后，点击下一步
10>.分配主控服务，分配完毕后点击下一步
11>.分配子服务和客户端
12>.配置NameNode和DataNode在服务器上的存储路径
输入Grafana Admin的密码，如下图：
点击途中的有警告的按钮，咱们依然还需要输入一个密码，如下图：
13>.查看安装预览页面，显示了安装组件的概览信息（如果你察觉到哪里配置的不合理可以点击“back”返回去修改），如无异常，点击“Deploy”
14>.等待组件安装过程
15>.安装完毕，点击下一步
16>.安装完毕后，点击“Complete”，进入主界面
17>.进入Ambari的主界面
