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31 lines
1.4 KiB
XML
31 lines
1.4 KiB
XML
<?xml version='1.0' encoding='utf-8' ?>
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<!DOCTYPE section PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" "file:///C:/Program%20Files%20(x86)/Publican/DocBook_DTD/docbookx.dtd" [
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<!ENTITY % BOOK_ENTITIES SYSTEM "cloudstack.ent">
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%BOOK_ENTITIES;
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]>
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<section id="troubleshooting-dataloss-on-exported-primary-storage">
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<title>Data Loss on Exported Primary Storage</title>
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<formalpara>
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<title>Symptom</title>
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<para>Loss of existing data on primary storage which has been exposed as a Linux NFS server export on an iSCSI volume. </para>
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</formalpara>
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<formalpara>
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<title>Cause</title>
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<para>It is possible that a client from outside the intended pool has mounted the storage. When this occurs, the LVM is wiped and all data in the volume is lost</para>
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</formalpara>
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<formalpara>
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<title>Solution</title>
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<para>When setting up LUN exports, restrict the range of IP addresses that are allowed access by specifying a subnet mask. For example:</para>
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</formalpara>
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<programlisting>echo “/export 192.168.1.0/24(rw,async,no_root_squash)” > /etc/exports</programlisting>
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<para>Adjust the above command to suit your deployment needs.</para>
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<formalpara>
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<title>More Information</title>
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<para>See the export procedure in the "Secondary Storage" section of the CloudPlatform Installation Guide</para>
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</formalpara>
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</section>
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