S1_搭建分布式OpenStack集群_01 准备虚拟机

Openstack版本：openstack-queen 版本

一、环境准备

网络规划：

Management + API Network：10.10.11.0/24 eth1    网桥：br1

VM (Tenant Network：             10.10.12.0/24 eth2    网桥：br2

External Network：                   10.10.10.0/24 eth0    网桥vbr

集群环境：Centos7.4 x86_64

Controller： 2C + 8G + 50G  eth0 eth1 eth2

Compute1：2C + 8G + 50G  eth0 eth1

Neutron：    2C + 8G + 50G  eth0 eth1

Cinder：      2C + 8G + 50G  eth0 eth1

附加节点 为集群提供本地yum源

Yum节点： 2C + 8G + 50G  eth0  网桥:br1  IP:10.10.11.200

二、搭建网桥

2.1 创建网桥文件

创建网桥文件：vbr.xml

networks]# cd /etc/libvirt/qemu/networks/
networks]# cat vbr.xml
<network>
  <name>vbr</name>
  <forward mode='nat'/>
  <bridge name='vbr' stp='on' delay='0'/>
  <ip address='10.10.10.1' netmask='255.255.255.0'>
    <dhcp>
      <range start='10.10.10.10' end='10.10.10.254'/>
    </dhcp>
  </ip>
</network>

创建网桥文件：br1.xml
networks]# cat br1.xml
<network>
  <name>br1</name>
  <bridge name='br1' stp='on' delay='0'/>
  <ip address='10.10.11.1' netmask='255.255.255.0'>
    <dhcp>
      <range start='10.10.11.10' end='10.10.11.254'/>
    </dhcp>
  </ip>

创建网桥文件：br2.xml

networks]# cat br2.xml
<network>
  <name>br2</name>
  <uuid>f06b24c9-963b-4239-a75a-25d4814df099</uuid>
  <ip address='10.10.12.1' netmask='255.255.255.0'>
    <dhcp>
      <range start='10.10.12.10' end='10.10.12.254'/>
    </dhcp>
  </ip>
</network>

2.2 启用网桥

定义：

networks]# for i in `ls *.xml`
> do
> virsh net-define $i
> done
Network br1 defined from br1.xml
Network br2 defined from br2.xml
Network vbr defined from vbr.xml

启动：

networks]# for i in vbr br1 br2
> do
> virsh net-start $i
> done

开机自启：

networks]# for i in vbr br1 br2
> do
> virsh net-autostart $i
> done
Network vbr marked as autostarted
Network br1 marked as autostarted
Network br2 marked as autostarted

ifconfig 可见：

三、创建4台虚拟机

3.1 准备 镜像模板 + 虚拟机定义文件

提前准备好:node.qcow2 和node.xml 并作对应修改，否则无法使用：

node.xml关键信息：

qemu]# cd /etc/libvirt/qemu/
qemu]# cat node.xml | grep "<name>"
  <name>node</name>

qemu]# cat node.xml | grep "<memory"
  <memory unit='KiB'>8848000</memory>

qemu]# cat node.xml | grep "<currentMemory"
  <currentMemory unit='KiB'>8848000</currentMemory>

qemu]# cat node.xml | grep "<source file"
      <source file='/var/lib/libvirt/images/node.img'/>

3.2 创建脚本 build.sh

sh]# ls
build.sh
sh]# cat build.sh
#!/bin/bash
read -p "How many VMs do you want:" Num
for((i=1;i<=$Num;i++));
do
   read -p "Name:" name   
   cd /var/lib/libvirt/images
   qemu-img create -f qcow2 -b node.qcow2 $name.img 50G
   cd /etc/libvirt/qemu
   sed "s,node,$name," node.xml > $name.xml
   virsh define $name.xml
done

3.3 创建虚拟机

sh]# bash build.sh
How many dou you want:4
Name:controller
Formatting 'controller.img', fmt=qcow2 size=53687091200 backing_file='node.qcow2' encryption=off cluster_size=65536 lazy_refcounts=off
Domain controller defined from controller.xml

Name:compute1
Formatting 'compute1.img', fmt=qcow2 size=53687091200 backing_file='node.qcow2' encryption=off cluster_size=65536 lazy_refcounts=off
Domain compute1 defined from compute1.xml

Name:neutron
Formatting 'neutron.img', fmt=qcow2 size=53687091200 backing_file='node.qcow2' encryption=off cluster_size=65536 lazy_refcounts=off
Domain neutron defined from neutron.xml

Name:cinder
Formatting 'cinder.img', fmt=qcow2 size=53687091200 backing_file='node.qcow2' encryption=off cluster_size=65536 lazy_refcounts=off
Domain cinder defined from cinder.xml

sh]# virsh list --all
 Id    Name                           State
----------------------------------------------------
 1     yum                            running
 -     cinder                         shut off
 -     compute1                       shut off
 -     controller                     shut off
 -     neutron                        shut off

3.4 根据配置分别给虚拟机添加网卡

打开virt-manager，这里只演示给controller添加网卡：

添加vbr：

添加br1:

添加br2:

其他主机一样，不需要添加vbr，只需要添加br1和br2。

启动虚拟机：

]# for i in controller compute1 neutron cinder
> do
> virsh start $i
> done