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Vm's do not start in the Master 1 month 1 week ago #2162

  • Wellington Maesta da Silva
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I simulated a server failure process (unplugging it from the socket), but the VMs do not start alone on the Master, and I do not see them in the Pool to start manually on the Master.

Using XCP-ng 8.1, I also noticed that XCP issued an alert for HA-Lizard Storage Controller Notice, 3 times: Ha-Lizard - check_slave_status, HA-Lizard - fence_host, right after the problem with the server. And it takes 10 minutes to understand that this host is down / in trouble (appears as active in the XCP-ng Center during the 10 minutes). However, I do not see the VMs on that server, it does not start on the Master and the VMs do not appear in the Pool even after 10 minutes.

My HA-Lizard configuration is with two servers.

And I also get I'm receiving HA-Lizard Alert message - check_quorum - Failed to connect 1 or more heuristic IP address [192.XXX.XXX.XXX]

My main network is 192.XXX.XXX.XXX and ISCSI network 10.10.10.X, the heuristic IP has to be one of my main network, another machine on the main network or ISCSI IP, I didn't understand this part very well !
I followed the configuration according to the video:


Any idea what's going on? If you can help me thank you!

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Vm's do not start in the Master 1 month 1 week ago #2163

  • Wellington Maesta da Silva
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.

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Last edit: by Wellington Maesta da Silva. Reason: I found the options to change the settings I need.

Vm's do not start in the Master 1 month 1 week ago #2164

  • Salvatore Costantino
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HA will not work in a 2-host pool unless you have properly configured the heuristic IP, which should be a PINGable IP as close to the host management interface as possible. Setting this will also make the errors go away.

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Vm's do not start in the Master 1 month 1 week ago #2165

  • Wellington Maesta da Silva
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Thanks Salvatore, I was trying to change exactly that, I managed to make a change 5 minutes ago, in addition to other adjustments that are in the manual, now it's working, thanks for the quick return.

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Vm's do not start in the Master 1 month 1 week ago #2169

  • Wellington Maesta da Silva
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Salvatore,

I am getting the following alert at the XCP-ng Center every 30 minutes:

HA-Lizard Storage Controller Notice
DRBD Resource: [iscsi1] in [StandAlone] state - expected Connected state

Can you tell me what it would be? I checked the network traffic log, and did not notice disconnection on the interface.

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Last edit: by Wellington Maesta da Silva.

Vm's do not start in the Master 1 month 1 week ago #2170

  • Salvatore Costantino
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Certain crashes (simulated in your case) can cause DRBD to trigger a split brain. This happens when DRBD cannot reliably determine which host has the most up to date data. This is a rare condition, but can occur. There is a script included with ha-lizard that can easily resolve this for you. I am going under the assumption that you are still in a test environment. If not, you should backup your VMs before running the script.

Script can be found here: /etc/iscsi-ha/scripts/drbd-sb-tool
The prompts will walk you through the process
The following user(s) said Thank You: Wellington Maesta da Silva

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