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From "ASF subversion and git services (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CLOUDSTACK-9509) KVM Hosts connect with no storage
Date Wed, 02 Nov 2016 17:43:58 GMT

    [ https://issues.apache.org/jira/browse/CLOUDSTACK-9509?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15629783#comment-15629783
] 

ASF subversion and git services commented on CLOUDSTACK-9509:
-------------------------------------------------------------

Commit 68f22e2a438c5ec1b7a390632cb94256bfdb6938 in cloudstack's branch refs/heads/master from
[~rohit.yadav@shapeblue.com]
[ https://git-wip-us.apache.org/repos/asf?p=cloudstack.git;h=68f22e2 ]

Merge pull request #1694 from shapeblue/kvm-no-storage-failfast

CLOUDSTACK-9509: Host Connects Without StorageKVM hosts on shared storage failure was accepted
by mgmt server with the
host state as Up, even though there was no primary/shared storage available on
it. This patch offers a quick fix by throwing an exception in the storage monitor
which connects storage pool on host. The failure is trapped by agent manager
that disconnects the agent without any investigation.

Based on Lab tests, KVM agent may take upto 2 minutes to attempt NFS mount when
the storage is inaccessible (firewalled, or shutdown) before returning back with
an error. It is safe to assume that this won't add pressure on mgmt server due to
several reconnection attempts, and KVM agent would retry reconnection every 2
minutes.

For such KVM hosts, where failure happens due to storage issues; they will be
briefly put in Alert state but will be mostly be in Connecting state during which
the KVM host attempts to mount/reconfigure NFS storage pool.

/cc @jburwell @karuturi
@blueorangutan package

* pr/1694:
  CLOUDSTACK-9509: Host Connects Without Storage

Signed-off-by: Rohit Yadav <rohit.yadav@shapeblue.com>


> KVM Hosts connect with no storage
> ---------------------------------
>
>                 Key: CLOUDSTACK-9509
>                 URL: https://issues.apache.org/jira/browse/CLOUDSTACK-9509
>             Project: CloudStack
>          Issue Type: Bug
>      Security Level: Public(Anyone can view this level - this is the default.) 
>            Reporter: Rohit Yadav
>            Assignee: Rohit Yadav
>            Priority: Critical
>             Fix For: 4.8.1, 4.10.0.0, 4.9.1.0
>
>
> KVM hosts on shared storage failure was accepted by mgmt server with the
> host state as Up, even though there was no primary/shared storage available on it. They
fail the ModifyStoragePoolCommand, but the management server continues on with adding SSH
keys and marking them as up.



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