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From "Wido den Hollander (JIRA)" <>
Subject [jira] [Issue Comment Deleted] (CLOUDSTACK-3535) No HA actions are performed when a KVM host goes offline
Date Tue, 06 Aug 2013 09:10:49 GMT


Wido den Hollander updated CLOUDSTACK-3535:

    Comment: was deleted

(was: Fyi, Lennert is my colleague :)

I've been writing some extra code for the HA. It's mainly a PoC for myself, but I was thinking
about running an extra Python webservice on port 8251 on the KVM Agent which only tells which
Instances are still running on the host in case the Agent doesn't respond.

The Agent can crash due to some unforeseen reason, but the Instances might still be running
just fine.

So I wanted to create a backup where the Investigator can double-check if the Instance is
still alive without doing a ICMP ping.

It's a simple Webservice which gives back some JSON data about what Instances are running
on that host so the Investigator knows that.)
> No HA actions are performed when a KVM host goes offline
> --------------------------------------------------------
>                 Key: CLOUDSTACK-3535
>                 URL:
>             Project: CloudStack
>          Issue Type: Bug
>      Security Level: Public(Anyone can view this level - this is the default.) 
>          Components: Hypervisor Controller, KVM, Management Server
>    Affects Versions: 4.1.0, 4.1.1, 4.2.0
>         Environment: KVM (CentOS 6.3) with CloudStack 4.1
>            Reporter: Paul Angus
>            Assignee: edison su
>            Priority: Blocker
>             Fix For: 4.2.0
>         Attachments: management-server.log.Agent
> If a KVM host 'goes down', CloudStack does not perform HA for instances which are marked
as HA enabled on that host (including system VMs)
> CloudStack does not show the host as disconnected.

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