OpenStack入门修炼之如何创建生产使用的openstack镜像（16）
在linux-node1节点上：、# yum install -y openstack-nova-compute
# yum install -y libvirt qemu-kvm
# systemctl start libvirtd
# systemctl enable libvirtd
# vim /etc/nova/nova.conf
增加novncproxy的地址：
novncproxy_base_url=http://192.168.56.11:6080/vnc_auto.html
# systemctl start openstack-nova-compute
# systemctl enable openstack-nova-compute
# source admin-openstack
# nova service-list
当需要删除该节点时，只能从命令行进行删除:nova service-delete ID。在horizon界面上是只能关闭服务，无法进行删除。
创建openstack镜像的过程：
（1）创建一个虚拟机硬盘，格式qcow2，大小为10G
# qemu-img create -f qcow2 /tmp/centos.qcow2 10G
Formatting '/tmp/centos.qcow2', fmt=qcow2 size=10737418240 encryption=off cluster_size=65536 lazy_refcounts=off refcount_bits=16
（2）创建虚拟机
# virt-install --virt-type kvm --name centos --ram 1024 \
--disk /tmp/centos.qcow2,format=qcow2 \
--network network=default \
--graphics vnc,listen=0.0.0.0 --noautoconsole \
--os-type=linux --os-variant=centos7.0 \
--location=/tmp/CentOS-7-x86_64-Minimal-1511.iso
# virsh list --all
Id 名称 状态
----------------------------------------------------
- centos 关闭
# virsh start centos
（3）TightVNC链接192.168.56.11进入系统安装
只分根分区，私有云不分swap分区
（4）启动虚拟机
# virsh start centos
（5）在虚拟机内安装默认的软件，或基础优化
yum install net-tools tree screen wget git vim
（6）openstack上传镜像
# openstack image create "Centos-7-x86_64" --file=/tmp/centos.qcow2 --disk-format qcow2 --container-format bare --public
+------------------+------------------------------------------------------+
| Field | Value |
+------------------+------------------------------------------------------+
| checksum | 4ac6fb14f7e5bb3c9889df4bda71474a |
| container_format | bare |
| created_at | 2017-12-07T08:06:55Z |
| disk_format | qcow2 |
| file | /v2/images/5aa6e9a1-4aea-467c-a684-51080c326887/file |
| id | 5aa6e9a1-4aea-467c-a684-51080c326887 |
| min_disk | 0 |
| min_ram | 0 |
| name | Centos-7-x86_64 |
| owner | 21a45d59913d4c05b46ad3ec92e61656 |
| protected | False |
| schema | /v2/schemas/image |
| size | 1145896960 |
| status | active |
| tags | |
| updated_at | 2017-12-07T08:08:42Z |
| virtual_size | None |
| visibility | public |
+------------------+------------------------------------------------------+
# openstack image list
+--------------------------------------+-----------------+--------+
| ID | Name | Status |
+--------------------------------------+-----------------+--------+
| 5aa6e9a1-4aea-467c-a684-51080c326887 | Centos-7-x86_64 | active |
| 51e1e125-dbe3-49c6-a3d5-55c89f195f55 | cirros | active |
+--------------------------------------+-----------------+--------+
（7）通过上传的镜像创建centos7云主机
使用admin账户创建云主机类型，后使用demo用户进行创建云主机
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