故障现象：Centos7.3使用yum安装完cloudstack-agent后，尝试启动cloudstack-agent服务，看了下，服务无法正常启动，要么就是启动后，马上就停止了，查看日志发现如下报错：
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# cat /var/log/cloudstack/agent/agent.log
2017-11-16 23:30:24,507 WARN [cloud.resource.ServerResourceBase] (main:null) (logid:) Nics are not specified
in
properties
file
/db
, will try to autodiscover
2017-11-16 23:30:24,512 INFO [cloud.resource.ServerResourceBase] (main:null) (logid:) Designating private to be nic br0
2017-11-16 23:30:24,534 INFO [kvm.resource.LibvirtConnection] (main:null) (logid:) No existing libvirtd connection found. Opening a new one
2017-11-16 23:30:24,787 INFO [org.reflections.Reflections] (main:null) (logid:) Reflections took 51 ms to scan 1 urls, producing 7 keys and 10 values
2017-11-16 23:30:24,802 ERROR [cloud.agent.AgentShell] (main:null) (logid:) Unable to start agent: Failed to get private nic name
2017-11-16 23:30:35,350 INFO [cloud.agent.AgentShell] (main:null) (logid:) Agent started
2017-11-16 23:30:35,352 INFO [cloud.agent.AgentShell] (main:null) (logid:) Implementation Version is 4.9.2.0
2017-11-16 23:30:35,354 INFO [cloud.agent.AgentShell] (main:null) (logid:) agent.properties found at
/etc/cloudstack/agent/agent
.properties
2017-11-16 23:30:35,358 INFO [cloud.agent.AgentShell] (main:null) (logid:) Defaulting to using properties
file
for
storage
2017-11-16 23:30:35,359 INFO [cloud.agent.AgentShell] (main:null) (logid:) Defaulting to the constant
time
backoff algorithm
2017-11-16 23:30:35,373 INFO [cloud.utils.LogUtils] (main:null) (logid:) log4j configuration found at
/etc/cloudstack/agent/log4j-cloud
.xml
2017-11-16 23:30:35,385 INFO [cloud.agent.AgentShell] (main:null) (logid:) Using default Java settings
for
IPv6 preference
for
agent connection
2017-11-16 23:30:35,509 INFO [cloud.agent.Agent] (main:null) (logid:)
id
is
2017-11-16 23:30:35,512 WARN [cloud.resource.ServerResourceBase] (main:null) (logid:) Nics are not specified
in
properties
file
/db
, will try to autodiscover
2017-11-16 23:30:35,518 INFO [cloud.resource.ServerResourceBase] (main:null) (logid:) Designating private to be nic br0
2017-11-16 23:30:35,543 INFO [kvm.resource.LibvirtConnection] (main:null) (logid:) No existing libvirtd connection found. Opening a new one
2017-11-16 23:30:35,807 INFO [org.reflections.Reflections] (main:null) (logid:) Reflections took 49 ms to scan 1 urls, producing 7 keys and 10 values
2017-11-16 23:30:35,822 ERROR [cloud.agent.AgentShell] (main:null) (logid:) Unable to start agent: Failed to get private nic name
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然后我发现我的systemctl start cloudstack-agent，服务根本不起来，一开始有点陷入误区，查了很多办法，都没法解决问题。
尝试解决方法（添加主机）：
输入主机名称，用户名，密码
添加成功后，我们查看下cloudstack下agent的状态
然后我们查看下cloudstack-agent的配置文件：
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# cat /etc/cloudstack/agent/agent.properties
#Storage
#Thu Nov 16 23:35:18 CST 2017
guest.network.device=br0
workers=5
private.network.device=br0
port=8250
resource=com.cloud.hypervisor.kvm.resource.LibvirtComputingResource
pod=1
zone=1
hypervisor.
type
=kvm
guid=a9e231ac-d361-3d25-9692-efeb9e35bf3d
public.network.device=br0
cluster=1
local
.storage.uuid=2a89854c-a9f6-46e1-8378-767a25ddb0ec
domr.scripts.
dir
=scripts
/network/domr/kvm
LibvirtComputingResource.
id
=7
host=172.16.2.1
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当我们遇到当前没法处理的时候，不妨试着往下一步走，人生不也是如此么。
本文转自 冰冻vs西瓜 51CTO博客，原文链接：http://blog.51cto.com/molewan/1982661，如需转载请自行联系原作者
