##存储
- Fuse http://fuse.sourceforge.net/
- 主存储无法删除解决方法:到数据库找volumes表，找到相关volume 处于expunging 状态，表示已经删除，但remove字段是NULL，说明有问题，在删除后，removed应该有删除的时间，而不是为null.
mysql>use cloud;
mysql>update storage_pool set removed=now() where pod_id=5;
mysql>update volumes set removed=now() where pod_id=5;
4.3版本已经解决此bug
https://issues.apache.org/jira/browse/CLOUDSTACK-4697
https://issues.apache.org/jira/browse/CLOUDSTACK-4402
##网络
Looks like the template names are wrong.
- For Hyper-V
-m /mnt/secondary -u http://download.cloud.com/templates/4.3/systemvm64template-2013-12-23-hyperv.vhd.bz2 -h hyperv -s -F
- For XenServer:
-m /mnt/secondary -u http://download.cloud.com/templates/acton/acton-systemvm-02062012.vhd.bz2 -h xenserver -s -F
- For vSphere:
-m /mnt/secondary -u http://download.cloud.com/templates/burbank/burbank-systemvm-08012012.ova -h vmware -s -F
- For KVM:
-m /mnt/secondary -u http://download.cloud.com/templates/acton/acton-systemvm-02062012.qcow2.bz2 -h kvm -s -F
- For LXC:
-m /mnt/secondary -u http://download.cloud.com/templates/acton/acton-systemvm-02062012.qcow2.bz2 -h lxc -s -F
##区域 清理一个区域的步骤，SQL
mysql> delete from volumes;
mysql> delete from storage_pool;
mysql> delete from dc_storage_network_ip_range;
mysql> delete from nics;
mysql> select * from cluster;
mysql> delete from host_pod_ref;
mysql>delete from image_store;
mysql> delete from vm_instance ;
mysql> delete from data_center;
##提供点
##集群
##主机
##虚拟机
- KVM 做虚拟化程序，全局参数： kvm.snapshot.enabled 设置为true后 才能做快照，且不支持实例的快照，只支持卷的快照
- 修改虚拟机操作系统用户名，通过修改数据库来修改实例的名字：比如把uuid修改为 test
##系统路由
##vpc 通过域来实现资源的隔离，操作顺序是:先建立多个域，然后再创建用户的时候，选择不同的域。使之用户级别不同（admin/user）
##高可用 1.全局变量 ha.tag 2.计算方案，ha标签 3.主机ha 标签 ##数据库 ###cloudstack4.2.1
- 数据中心表：data_center表
- 提供点表：host_pod_ref表
- 集群表：cluster表
- 主机表：host表