OpenStack（四）计算节点扩容、云主机迁移

一、计算节点扩容

1.环境准备

删除之前创建的云主机，环境资源充足的话无需删除。只是因为实验环境内存资源匮乏，为了不影响等会扩容程序运行才删除的

检查新的计算节点（nova02）：

- 是否配置静态IP及主机名

- 是否能与openstack、nova01相互ping主机名ping通

- 是否配置/etc/resolv.conf，删除了search开头的行

-是否配置了时间同步

-是否配置了yum源

-是否安装了依赖包 qemu-kvm libvirt-client libvirt-daemon libvirt-daemon-driver-qemu python-setuptools

2.修改应答文件answer.ini，然后执行安装

openstack节点执行：

vi /root/answer.ini

98: CONFIG_COMPUTE_HOSTS=192.168.0.101,192.168.0.102  #计算节点增加192.168.0.102
102: CONFIG_NETWORK_HOSTS=192.168.0.100,192.168.0.101,192.168.0.102  #网络配置增加192.168.0.102节点

packstack --answer-file=answer.ini #按照提示输入nova02节点的密码开始扩容计算节点，预计20分钟完成

**** Installation completed successfully ******

Additional information:
* File /root/keystonerc_admin has been created on OpenStack client host 192.168.0.100. To use the command line tools you need to source the file.
* To access the OpenStack Dashboard browse to http://192.168.0.100/dashboard .
Please, find your login credentials stored in the keystonerc_admin in your home directory.
* The installation log file is available at: /var/tmp/packstack/20230531-171625-nUyNJR/openstack-setup.log
* The generated manifests are available at: /var/tmp/packstack/20230531-171625-nUyNJR/manifests

安装后，apache配置已被还原，需要重新添加解决bug的那条：

vi /etc/httpd/conf.d/15-horizon_vhost.conf

  ## Server aliases
  ServerAlias 192.168.0.100
  ServerAlias openstack
  ServerAlias localhost
  WSGIDaemonProcess apache group=apache processes=3 threads=10 user=apache
  WSGIProcessGroup apache
  WSGIApplicationGroup %{GLOBAL}  #添加这行
  WSGIScriptAlias /dashboard "/usr/share/openstack-dashboard/openstack_dashboard/wsgi/django.wsgi"

systemctl reload httpd