Hello!  Wanted to see if anyone else has ran into this issue or if you can 
point me in the right direction...

I have 2 KVM CloudStack-agents version 4.11.2 running Centos7 that are not able 
to start the cloudstack-agent service if the agent.propreties file specifies 
the variable "private.network.device=cloudbr0".  This is automatically added to 
the config file when the agent connects to the server, if the private network 
is commented out the service is able to start up but any system VMs are unable 
to connect to the network.  This environment was working with my original 2 KVM 
agents, but after deleting the hosts and rebuilding with identical network 
config I've ran into this issue.  I have logs and configs below, any ideas what 
is wrong?  This is a dev proof of concept environment, so I can rebuild if 
needed.  Thank you for your time!


2019-01-07 15:36:10,257 INFO  [cloud.agent.AgentShell] (main:null) (logid:) 
Agent started
2019-01-07 15:36:10,259 INFO  [cloud.agent.AgentShell] (main:null) (logid:) 
Implementation Version is 4.11.2.0
2019-01-07 15:36:10,260 INFO  [cloud.agent.AgentShell] (main:null) (logid:) 
agent.properties found at /etc/cloudstack/agent/agent.properties
2019-01-07 15:36:10,271 INFO  [cloud.agent.AgentShell] (main:null) (logid:) 
Defaulting to using properties file for storage
2019-01-07 15:36:10,272 INFO  [cloud.agent.AgentShell] (main:null) (logid:) 
Defaulting to the constant time backoff algorithm
2019-01-07 15:36:10,282 INFO  [cloud.utils.LogUtils] (main:null) (logid:) log4j 
configuration found at /etc/cloudstack/agent/log4j-cloud.xml
2019-01-07 15:36:10,293 INFO  [cloud.agent.AgentShell] (main:null) (logid:) 
Using default Java settings for IPv6 preference for agent connection
2019-01-07 15:36:10,384 INFO  [cloud.agent.Agent] (main:null) (logid:) id is 15
2019-01-07 15:36:10,387 WARN  [cloud.resource.ServerResourceBase] (main:null) 
(logid:) Incorrect details for private Nic during initialization of 
ServerResourceBase
2019-01-07 15:36:10,387 ERROR [cloud.agent.AgentShell] (main:null) (logid:) 
Unable to start agent: Unable to configure LibvirtComputingResource


This occurs on version 4.11.1 and 4.11.2, and I've seen other threads with this 
issue on earlier versions that reported downgrading the agent fixed this issue.



NIC CONFIGURATION:

ifcfg-cloudbr0
DEVICE=cloudbr0
TYPE=Bridge
ONBOOT=yes
BOOTPROTO=none
IPV6INIT=no
IPV6_AUTOCONF=no
DELAY=5
STP=yes

Ifcfg-eno1.8
HWADDR=XX:XX:XX:XX:XX:XX
DEVICE=eno1.8
ONBOOT=yes
HOTPLUG=no
BOOTPROTO=none
TYPE=Vlan
VLAN=yes
BRIDGE=cloudbr0

cloudbr0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        ether txqueuelen 1000  (Ethernet)
        RX packets 2368  bytes 116316 (113.5 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 3  bytes 270 (270.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

eno1.8: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        ether txqueuelen 1000  (Ethernet)
        RX packets 3159  bytes 163465 (159.6 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 1752  bytes 91924 (89.7 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0


brctl show
bridge name     bridge id               STP enabled     interfaces
cloud0          8000.fe00a9fe00fc       no              vnet0
                                                        vnet3
cloudbr0        8000.64510630b869       yes             eno1.8
                                                        vnet2
                                                        vnet5
cloudbr1        8000.64510630b869       yes             eno1.7
                                                        vnet1
                                                        vnet4
virbr0          8000.525400b79d7d       yes             virbr0-nic


Agent.properties file networks:
public.network.device=cloudbr0
private.network.device=cloudbr0
guest.network.device=cloudbr1


Cloudstack Zone network config:

Zone > Physical Network 1 > Public
Traffic Type

Public



Broadcast Domain Type

Vlan



KVM traffic label

cloudbr0



10.x.y1

255.255.255.0

vlan://untagged

10.x.y.100

10.x.y.199

[ROOT] system


**Note: The public network works fine, virtual routers have network access.

Zone > Physical Network 1 > Management
Traffic Type

Management



Broadcast Domain Type

Native



KVM traffic label

cloudbr0



Pod1

10.x.y.1

255.255.255.0

vlan://8

10.x.y.30

10.x.y.49

system VMs



Pod1

10.x.y.1

255.255.255.0

vlan://8

10.x.y.50

10.x.y.99



**NOTE: Tried above Mangement IP ranges with and without vlan tags, can't get 
any system VMs to have network connectivity


Zone > Physical Network 1 > Guest
State

Enabled

VLAN/VNI Range(s)

800-850

KVM traffic label

cloudbr1




Daniel Farrar


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