笔记本有一套简单的CloudStack环境，用来做一些简单的测试，装在VMware的workstation里。
管理节点有两个网卡，用作内外网，eth0用作内网：192.168.0.2，eth1用作外网：172.16.1.2。经常装来装去的有时候也很烦，昨天索性吧eth1关闭，用命令：
#ifdown eth1
在UI上配了几个全局设置后，重启CloudStack服务，发现服务无法启动，明明刚才还可以用。就检查了一下log，显示为：
写道
2014-04-28 09:04:45,980 INFO [c.c.u.DatabaseIntegrityChecker] (main:null) Grabbing lock to check for database integrity.
2014-04-28 09:04:45,982 INFO [c.c.u.DatabaseIntegrityChecker] (main:null) Performing database integrity check
2014-04-28 09:04:45,986 DEBUG [c.c.u.DatabaseIntegrityChecker] (main:null) No duplicate hosts with the same local storage found in database
2014-04-28 09:04:45,986 DEBUG [c.c.u.d.VersionDaoImpl] (main:null) Checking to see if the database is at a version before it was the version table is created
2014-04-28 09:04:45,991 INFO [o.a.c.s.l.CloudStackExtendedLifeCycle] (main:null) Configuring CloudStack Components
2014-04-28 09:04:46,611 ERROR [n.s.e.d.MulticastRMICacheManagerPeerProvider] (main:null) Error starting heartbeat. Error was: No such device
java.net.SocketException: No such device
at java.net.PlainDatagramSocketImpl.join(Native Method)
at java.net.AbstractPlainDatagramSocketImpl.join(AbstractPlainDatagramSocketImpl.java:168)
at java.net.MulticastSocket.joinGroup(MulticastSocket.java:300)
2014-04-28 09:04:45,982 INFO [c.c.u.DatabaseIntegrityChecker] (main:null) Performing database integrity check
2014-04-28 09:04:45,986 DEBUG [c.c.u.DatabaseIntegrityChecker] (main:null) No duplicate hosts with the same local storage found in database
2014-04-28 09:04:45,986 DEBUG [c.c.u.d.VersionDaoImpl] (main:null) Checking to see if the database is at a version before it was the version table is created
2014-04-28 09:04:45,991 INFO [o.a.c.s.l.CloudStackExtendedLifeCycle] (main:null) Configuring CloudStack Components
2014-04-28 09:04:46,611 ERROR [n.s.e.d.MulticastRMICacheManagerPeerProvider] (main:null) Error starting heartbeat. Error was: No such device
java.net.SocketException: No such device
at java.net.PlainDatagramSocketImpl.join(Native Method)
at java.net.AbstractPlainDatagramSocketImpl.join(AbstractPlainDatagramSocketImpl.java:168)
at java.net.MulticastSocket.joinGroup(MulticastSocket.java:300)
从网上搜了一下解决方法，有建议是重新初始化，那好，我就执行了一遍：
cloudstack-setup-databases cloud:password@localhost --deploy-as=root
cloudstack-setup-management
熟悉cloudstack安装的都知道，这样执行下去，所有的配置以及数据库就都重置为默认信息了。等服务重启发现，仍然报相同的错误，很奇怪。搜索这个问题都跑到日文网站去了，看到一个好像类似网关路由一类的词语，突然让我想到eth1关闭的这个操作，所以怀疑与此有关，所以重新打开eth1
# ifup eth1
再次重启cloudstack服务，一切正常。
深入研究，怀疑可能与cloudstack需要默认网关有关。
检查静态路由如下：
写道
关闭eth1的状态
[root@ccp43 ~]# route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.0.0 * 255.255.255.0 U 0 0 0 eth0
link-local * 255.255.0.0 U 1002 0 0 eth0
开启eth1的状态
[root@ccp43 ~]# route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
172.16.1.0 * 255.255.255.0 U 0 0 0 eth1
192.168.0.0 * 255.255.255.0 U 0 0 0 eth0
link-local * 255.255.0.0 U 1002 0 0 eth0
link-local * 255.255.0.0 U 1003 0 0 eth1
default 172.16.1.254 0.0.0.0 UG 0 0 0 eth1
[root@ccp43 ~]# route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.0.0 * 255.255.255.0 U 0 0 0 eth0
link-local * 255.255.0.0 U 1002 0 0 eth0
开启eth1的状态
[root@ccp43 ~]# route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
172.16.1.0 * 255.255.255.0 U 0 0 0 eth1
192.168.0.0 * 255.255.255.0 U 0 0 0 eth0
link-local * 255.255.0.0 U 1002 0 0 eth0
link-local * 255.255.0.0 U 1003 0 0 eth1
default 172.16.1.254 0.0.0.0 UG 0 0 0 eth1
所以，个人认为这与cloudstack在启动时还会检查默认路由，如果没有，则会报错，没有此设备，这种情况是非常偶尔的操作下才会出现吧。
有空再看看代码里怎么写吧。