Hello Guys,
I have tried the following two cases.
1, "echo c > /proc/sysrq-trigger"
2, Pulled the network cable of one of the host
In both cases, the following happened.
=====
2018-03-13 08:22:54,978 DEBUG [c.c.a.m.ClusteredAgentManagerImpl]
(AgentTaskPool-15:ctx-c8d9f5d2) (logid:c0a3d2da) Notifying other nodes
of to disconnect
2018-03-13 08:22:54,983 INFO [c.c.a.m.AgentManagerImpl]
(AgentTaskPool-16:ctx-d8204625) (logid:ffe4a426) Host 4 is disconnecting
with event AgentDisconnected
2018-03-13 08:22:54,985 DEBUG [c.c.a.m.AgentManagerImpl]
(AgentTaskPool-16:ctx-d8204625) (logid:ffe4a426) Host 4 is already Alert
2018-03-13 08:22:54,985 DEBUG [c.c.a.m.AgentManagerImpl]
(AgentTaskPool-16:ctx-d8204625) (logid:ffe4a426) Deregistering link for
4 with state Alert
2018-03-13 08:22:54,985 DEBUG [c.c.a.m.AgentManagerImpl]
(AgentTaskPool-16:ctx-d8204625) (logid:ffe4a426) Remove Agent : 4
=====
But nothing happened for the vm's in that node. I have waited for one
hour and the VM's in that node has been migrated to the other available
hosts. I think the issue is that the management server still thinks that
the VM's in that host is running. Please check the following logs
=======
2018-03-13 11:08:25,882 DEBUG [c.c.c.CapacityManagerImpl]
(CapacityChecker:ctx-1d8378af) (logid:ae906a50) Found 1 VMs on host 4
2018-03-13 11:08:25,888 DEBUG [c.c.c.CapacityManagerImpl]
(CapacityChecker:ctx-1d8378af) (logid:ae906a50) Found 0 VM, not running
on host 4
========
On 03/13/2018 04:20 PM, Jon Marshall wrote:
I tried "echo c > /proc/sysrq-trigger" which stopped me getting into the server
but it did not stop the server responding to an ipmitool request on the manager eg -
"ipmitool -I lanplus -H 172.16.7.29 -U admin3 -P letmein chassis status"
from the management server got an answer saying the chassis power was on so CS
never registered the compute node as down.
I am obviously doing something wrong but cannot work it out.
The management server has one NIC - 172.16.7.4
Each compute node has 3 NICs -
cnode1 cnode2
mangement NIC 172.16.7.5 172.16.7.6
vm NIC 172.16.6.130 172.16.6.131
storage - 172.16.250.4 172.16.250.5
Dell LOM (for Idrac) 172.16.7.29 172.16.7.30
the dell LOM IPs are the ones used to configure OOBM in the UI
If I pull the storage NIC presumably nothing will happen as the ipmitool check
is running across the management NIC so I need to pull both ?
My understanding of host HA was the management server monitored the compute
nodes using ipmitool and if it did not get a response because the host was down
it would fence off that host and move the VMs to an active compute node.
This is obviously too simplistic so could someone explain how it is meant to
work and what it is protecting against ?
________________________________
From: Paul Angus <paul.an...@shapeblue.com>
Sent: 13 March 2018 07:01
To: users@cloudstack.apache.org
Subject: RE: KVM HostHA
Hi all,
One small note, unplugging the management NIC will only cause an HA event if
the storage is running over that NIC also.
Is the storage is over a separate NIC then, the guest VMs will continue to run
when the mgmt. NIC is unplugged, Host HA will detect the disk activity and
conclude that there is nothing it can do, as the VMs are still running other
than mark the hosts as degraded.
Kind regards,
Paul Angus
paul.an...@shapeblue.com
www.shapeblue.com<http://www.shapeblue.com>
[http://www.shapeblue.com/wp-content/uploads/2017/06/logo.png]<http://www.shapeblue.com/>
Shapeblue - The CloudStack Company<http://www.shapeblue.com/>
www.shapeblue.com
Rapid deployment framework for Apache CloudStack IaaS Clouds. CSForge is a
framework developed by ShapeBlue to deliver the rapid deployment of a
standardised ...
53 Chandos Place, Covent Garden, London WC2N 4HSUK
@shapeblue
-----Original Message-----
From: Parth Patel <parthpatel2...@gmail.com>
Sent: 12 March 2018 17:35
To: users@cloudstack.apache.org
Subject: Re: KVM HostHA
Hi Jon,
As I said, in my case, making the host HA didn't work but by just
having a HA VM running on host and executing - (WARNING) "echo c >
/proc/sysrq-trigger" to simulate a kernel crash on host, the
management server registered it as down and started the VM on another
host. I know I've suggested this before but I insist you give this a
try. Also, you don't need to completely power off the machine manually
but just plugging out the network cable works fine. The cloudstack
agent after losing connection to management server auto reboots
because of KVM heartbeat check shell script mentioned by Rohit Yadav
to one of my earlier queries in other thread.
On Mon 12 Mar, 2018, 21:23 Jon Marshall, <jms....@hotmail.co.uk> wrote:
Hi Paul
Thanks for the response.
I think I am not understanding how it was meant to work then. My
understanding was that the manager used ipmitool to just keep querying
the compute nodes as to their status so I assumed it didn't matter how
you shut the node down, once it was down the manager would get no
response and mark it as down (which it does).
I am in testing mode so I think I will just go and pull the power and
see what happens :)
Thanks
Jon
________________________________
From: Paul Angus <paul.an...@shapeblue.com>
Sent: 12 March 2018 15:31
To: users@cloudstack.apache.org
Subject: RE: KVM HostHA
Hi Jon,
I think that what you guys are finding, is that a controlled host
shutdown, which will cause the agent to shutdown cleanly; Is not
considered an HA event. I wouldn't expect CloudStack to take any
action if you shut down a host, only if the host (agent) stops responding.
Kind regards,
Paul Angus
paul.an...@shapeblue.com
www.shapeblue.com<http://www.shapeblue.com>
[http://www.shapeblue.com/wp-content/uploads/2017/06/logo.png]<http://www.shapeblue.com/>
Shapeblue - The CloudStack Company<http://www.shapeblue.com/>
www.shapeblue.com
Rapid deployment framework for Apache CloudStack IaaS Clouds. CSForge is a
framework developed by ShapeBlue to deliver the rapid deployment of a
standardised ...
[http://www.shapeblue.com/wp-content/uploads/2017/06/logo.png
[http://www.shapeblue.com/wp-content/uploads/2017/06/logo.png]
]<
http://www.shapeblue.com/>
[http://www.shapeblue.com/wp-content/uploads/2017/06/logo.png]<http://www.shapeblue.com/>
Shapeblue - The CloudStack Company<http://www.shapeblue.com/>
www.shapeblue.com
Rapid deployment framework for Apache CloudStack IaaS Clouds. CSForge is a
framework developed by ShapeBlue to deliver the rapid deployment of a
standardised ...
Shapeblue - The CloudStack Company<http://www.shapeblue.com/>
[http://www.shapeblue.com/wp-content/uploads/2017/06/logo.png]<http://www.shapeblue.com/>
Shapeblue - The CloudStack Company<http://www.shapeblue.com/>
www.shapeblue.com
Rapid deployment framework for Apache CloudStack IaaS Clouds. CSForge is a
framework developed by ShapeBlue to deliver the rapid deployment of a
standardised ...
www.shapeblue.com<http://www.shapeblue.com>
[http://www.shapeblue.com/wp-content/uploads/2017/06/logo.png]<http://www.shapeblue.com/>
Shapeblue - The CloudStack Company<http://www.shapeblue.com/>
www.shapeblue.com
Rapid deployment framework for Apache CloudStack IaaS Clouds. CSForge is a
framework developed by ShapeBlue to deliver the rapid deployment of a
standardised ...
Rapid deployment framework for Apache CloudStack IaaS Clouds. CSForge
is a framework developed by ShapeBlue to deliver the rapid deployment
of a standardised ...
53 Chandos Place, Covent Garden, London WC2N 4HSUK @shapeblue
-----Original Message-----
From: Jon Marshall <jms....@hotmail.co.uk>
Sent: 12 March 2018 15:15
To: users@cloudstack.apache.org
Subject: Re: KVM HostHA
I have the same issue here and am not entirely sure what the behaviour
should be.
I have one manager node and 2 compute nodes running 4.11 with ipmi working
correctly.
From the UI under HA -
HA Enabled Yes
HA State Available
HA Provider kvmhaprovider
although interestingly from the "Details" tab it shows -
HA enabled No
which I assume is a cosmetic issue ?
On each compute node I have one HA enabled VM and one non HA enabled VM.
I power off a compute node and the UI updates the host status and the VMs
on that node stop responding but they never fail over to the other node.
Couple of things I noticed -
1) as soon as i power off the compute node the HA state on the other node
shows "Ineligible"
2) In the UI the instances all still show as green even though two of them
are not available
Any help much appreciated
________________________________
From: victor <vic...@ihnetworks.com>
Sent: 07 March 2018 17:01
To: users@cloudstack.apache.org
Subject: KVM HostHA
Hello Guys,
I have installed cloudstack 4.11. I have enabled HA for each hosts I have
added. I have also added ipmi successfully (using ipmi driver).
The hosts are showing like the following.
=======
HA Enabled Yes
HA State Available
HA Provider kvmhaprovider
======
Also the host is showing the following correctly
Resource state --> Enabled
State --> UP
Power state --> On
So I have shutdown one of the hosts to see how the KVM hosts Ha is
working. I have waited for half an hour. But nothing has happened. What
will happen to the VM's in that host, if the host failed to back up.
There isn't much from logs.
Regards
Victor
