大数据一共3个集群,hadoop1 是master
主机名
ip
软件
hadoop1
172.16.21.40
Hadoop,HBase,Zk,Hive,Spark
hadoop2
172.16.21.41
Hadoop,HBase,Zk,Spark
hadoop3
172.16.21.42
Hadoop,HBase,Zk,Spark
hadoop4
172.16.21.43
Hadoop,HBase,Zk,Spark
数据库,redis,docker,web服务等
主机名
ip
软件
bigdata
172.16.21.30
docker mysql等
若需
vi /etc/sysconfig/network-scripts/ifcfg-eth0
DNS1=114.114.114.114
systemctl restart network
cd /etc/yum.repos.d
wget -O epel.repo http://mirrors.aliyun.com/repo/Centos-7.repo
yum clean all
rm -rf /var/cache/yum
yum makecache
若需
cat /etc/redhat-release
yum update
hostnamectl set-hostname hadoop2
systemctl status firewalld.service
# 没关闭的使用下面的命令
systemctl stop firewalld.service
chmod 755 ~/.ssh
ssh-keygen -t rsa
# 每个复制到除本机以外的服务器
ssh-copy-id -i ~/.ssh/id_rsa.pub root@172.16.21.40
ssh-copy-id -i ~/.ssh/id_rsa.pub root@172.16.21.41
ssh-copy-id -i ~/.ssh/id_rsa.pub root@172.16.21.42
ssh-copy-id -i ~/.ssh/id_rsa.pub root@172.16.21.43
错误:
hadoop1: Permission denied (publickey,gssapi-keyex,gssapi-with-mic,password).
解决:
vi /etc/ssh/sshd_config
修改PubkeyAuthentication yes
service sshd restart
172.16.21.30 为时钟服务器,其余的服务器按照此来同步
vim /etc/ntp.conf
# 对应位置添加
server 127.0.0.1
# 以及
restrict 172.16.0.0
# 启动
systemctl start ntpd
systemctl enable ntpd
# 立即同步时间,注意观察变化
ntpdate ntp1.aliyun.com
# 如果报错,域名解析错误
vi /etc/resolv.conf
# 添加
nameserver 114.114.114.114
# 写入bois
hwclock --systohc
# 查看bois
hwclock -r
# 添加定时任务
systemctl start crond.service
systemctl enable crond
crontab -e
# 添加信息
59 23 * * * ntpdate ntp1.aliyun.com
# 查看时间
timedatectl
其余客户端配置chrony
server 172.16.21.30
# 启动
systemctl start chronyd
systemctl enable chronyd
# 查看
chronyc sources -v
# 出现*表示可以。
先卸载本机的openjdk
rpm -qa|grep java
发现
java-1.7.0-openjdk-1.7.0.251-2.6.21.0.el7_7.x86_64
java-1.8.0-openjdk-1.8.0.242.b08-0.el7_7.x86_64
java-1.7.0-openjdk-headless-1.7.0.251-2.6.21.0.el7_7.x86_64
java-1.8.0-openjdk-headless-1.8.0.242.b08-0.el7_7.x86_64
除了.noarch都删除
rpm -e --nodeps java-1.8.0-openjdk-headless-1.8.0.242.b08-0.el7_7.x86_64
rpm -e --nodeps java-1.7.0-openjdk-headless-1.7.0.251-2.6.21.0.el7_7.x86_64
rpm -e --nodeps java-1.8.0-openjdk-1.8.0.242.b08-0.el7_7.x86_64
rpm -e --nodeps java-1.7.0-openjdk-1.7.0.251-2.6.21.0.el7_7.x86_64
上传jdk18
不支持jdk11!!!不要自己给自己找麻烦。
rpm 安装
cd /opt
rpm -ivh jdk-8u251-linux-x64.rpm
配置环境变量
vim /etc/profile
export JAVA_HOME=/usr/java/jdk1.8.0_251-amd64
export PATH=$PATH:$JAVA_HOME/bin
source /etc/profile
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