软件版本

1. ambari 2.7.5
2. HDP 3.1.5
3. centos7.9

设置静态IP

静态IP设置很简单，修改网络配置文件

vim /etc/sysconfig/network-scripts/ifcfg-ens33

配置如下

BOOTPROTO="static"
ONBOOT="yes"
IPADDR=192.168.1.21
NETMASK=255.255.255.0
GATEWAY=192.168.1.1
DNS1=192.168.1.1

每台机器均修改为静态IP

添加hosts文件

vim /etc/host

127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.1.21  hadoop1
192.168.1.22  hadoop2
192.168.1.23  hadoop3

配置免密并拷贝hosts文件

主节点访问子节点需要免密，使用命令生成密钥，并拷贝到子节点，主节点为hadoop1

 ssh-keygen
 ssh-copy-id

关闭防火墙

systemctl stop firewalld
systemctl disable firewalld
or
service firewalld stop
chkconfig firewalld off

关闭selinux

vim /etc/selinux/config
SELINUX=disabled

同步配置文件

scp /etc/hosts hadoop2:/etc/hosts
scp /etc/selinux/config hadoop2:/etc/selinux/config
scp /etc/hosts hadoop3:/etc/hosts
scp /etc/selinux/config hadoop3:/etc/selinux/config

挂载磁盘

[root@hadoop3 ~]# fdisk /dev/sdb 
Welcome to fdisk (util-linux 2.23.2).

Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.

Device does not contain a recognized partition table
Building a new DOS disklabel with disk identifier 0x6b24e51e.

Command (m for help): p

Disk /dev/sdb: 107.4 GB, 107374182400 bytes, 209715200 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x6b24e51e

   Device Boot      Start         End      Blocks   Id  System

Command (m for help): n
Partition type:
   p   primary (0 primary, 0 extended, 4 free)
   e   extended
Select (default p): p
Partition number (1-4, default 1): 
First sector (2048-209715199, default 2048): 
Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-209715199, default 209715199): 
Using default value 209715199
Partition 1 of type Linux and of size 100 GiB is set

Command (m for help): w
The partition table has been altered!

Calling ioctl() to re-read partition table.
Syncing disks.
[root@hadoop3 ~]# mkfs.xfs /dev/sdb1 
meta-data=/dev/sdb1              isize=512    agcount=4, agsize=6553536 blks
         =                       sectsz=512   attr=2, projid32bit=1
         =                       crc=1        finobt=0, sparse=0
data     =                       bsize=4096   blocks=26214144, imaxpct=25
         =                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0 ftype=1
log      =internal log           bsize=4096   blocks=12799, version=2
         =                       sectsz=512   sunit=0 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0
[root@hadoop3 ~]# mkdir /data01
[root@hadoop3 ~]# mount /dev/sdb1 /data01
[root@hadoop3 ~]# vi /etc/fstab 
[root@hadoop3 ~]# 
/dev/sdb1 /data01 xfs defaults 0 0

网络增强配置

如果是物理机，交换机插槽较多，可以配置bond6使用双网口进行访问，加快网络的吞吐。bond6配置后续有空会展开来描述。

总结

操作系统初始配置到此结束，后续进行安装前的yum配置。