https://gigatux.com/wiki/index.php?action=history&feed=atom&title=OS_images_become_unavailable 2026-11-06T13:40:43Z Revision history for this page on the wiki MediaWiki 1.46.2 https://gigatux.com/wiki/index.php?title=OS_images_become_unavailable&diff=332&oldid=prev 2013-01-25T12:39:58Z

<p></p> <table style="background-color: #fff; color: #202122;" data-mw-interface=""> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="en-GB"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 12:39, 25 January 2013</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l1">Line 1:</td> <td colspan="2" class="diff-lineno">Line 1:</td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>OS images are stored on both '''node00001.gigatux.com''' and '''node01001.gigatux.com'''. They are mounted via <del style="font-weight: bold; text-decoration: none;">NFS </del>on <del style="font-weight: bold; text-decoration: none;">each </del>other physical <del style="font-weight: bold; text-decoration: none;">server</del>.</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>OS images are stored on both '''node00001.gigatux.com''' and '''node01001.gigatux.com'''. They are mounted via <ins style="font-weight: bold; text-decoration: none;">[http://en.wikipedia.org/wiki/SSHFS SSHFS] </ins>on <ins style="font-weight: bold; text-decoration: none;">all </ins>other physical <ins style="font-weight: bold; text-decoration: none;">servers</ins>.</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">Sometimes, the </del>NFS <del style="font-weight: bold; text-decoration: none;">connection can go </del>down. <del style="font-weight: bold; text-decoration: none;">Unfortunately</del>, NFS <del style="font-weight: bold; text-decoration: none;">is a kernel-level server so sometimes this means that it's really difficult to get it running again</del>.</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">We used to use </ins>NFS <ins style="font-weight: bold; text-decoration: none;">but this regularly went </ins>down. <ins style="font-weight: bold; text-decoration: none;">However</ins>, NFS <ins style="font-weight: bold; text-decoration: none;">mounts still exist</ins>.</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">As a backup, we can use [http://en.wikipedia.org/wiki/</del>SSHFS <del style="font-weight: bold; text-decoration: none;">SSHFS] which is basically a filesystem mounted using SSH. This is pretty reliable. To get this working</del>, the <del style="font-weight: bold; text-decoration: none;">old NFS mounts need to be unmounted and SSHFS needs to be set up. The </del>following commands <del style="font-weight: bold; text-decoration: none;">achieve this</del>:</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">If you need to remount the </ins>SSHFS <ins style="font-weight: bold; text-decoration: none;">mounts for whatever reason</ins>, <ins style="font-weight: bold; text-decoration: none;">type </ins>the following commands:</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* umount -l /usr/share/dtc-xen-os</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* umount -l /usr/share/dtc-xen-os</div></td></tr> <tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l11">Line 11:</td> <td colspan="2" class="diff-lineno">Line 11:</td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* sshfs dtcmirror@node00001.gigatux.com:/usr/share/dtc-xen-app/ /usr/share/dtc-xen-app/</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* sshfs dtcmirror@node00001.gigatux.com:/usr/share/dtc-xen-app/ /usr/share/dtc-xen-app/</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* sshfs dtcmirror@node00001.gigatux.com:/usr/share/dtc-xen-hvm/ /usr/share/dtc-xen-hvm/</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>* sshfs dtcmirror@node00001.gigatux.com:/usr/share/dtc-xen-hvm/ /usr/share/dtc-xen-hvm/</div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">If everything fails, the NFS mountpoints are still available so something like the below should work:</ins></div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">* umount -l /usr/share/dtc-xen-os</ins></div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">* umount -l /usr/share/dtc-xen-app</ins></div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">* umount -l /usr/share/dtc-xen-hvm</ins></div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">* mount -v node01001.gigatux.com:/usr/share/dtc-xen-os /usr/share/dtc-xen-os -o rsize=65526,wsize=65536,proto=udp,noauto,vers=3</ins></div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">* mount -v node01001.gigatux.com:/usr/share/dtc-xen-app /usr/share/dtc-xen-app -o rsize=65526,wsize=65536,proto=udp,noauto,vers=3</ins></div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">* mount -v node01001.gigatux.com:/usr/share/dtc-xen-hvm /usr/share/dtc-xen-hvm -o rsize=65526,wsize=65536,proto=udp,noauto,vers=3</ins></div></td></tr> </table>

Cocodude https://gigatux.com/wiki/index.php?title=OS_images_become_unavailable&diff=307&oldid=prev 2012-10-03T10:41:28Z

<p>Created page with &quot;OS images are stored on both &#039;&#039;&#039;node00001.gigatux.com&#039;&#039;&#039; and &#039;&#039;&#039;node01001.gigatux.com&#039;&#039;&#039;. They are mounted via NFS on each other physical server. Sometimes, the NFS connection c...&quot;</p> <p><b>New page</b></p><div>OS images are stored on both &#039;&#039;&#039;node00001.gigatux.com&#039;&#039;&#039; and &#039;&#039;&#039;node01001.gigatux.com&#039;&#039;&#039;. They are mounted via NFS on each other physical server.<br /> <br /> Sometimes, the NFS connection can go down. Unfortunately, NFS is a kernel-level server so sometimes this means that it&#039;s really difficult to get it running again.<br /> <br /> As a backup, we can use [http://en.wikipedia.org/wiki/SSHFS SSHFS] which is basically a filesystem mounted using SSH. This is pretty reliable. To get this working, the old NFS mounts need to be unmounted and SSHFS needs to be set up. The following commands achieve this:<br /> <br /> * umount -l /usr/share/dtc-xen-os<br /> * umount -l /usr/share/dtc-xen-app<br /> * umount -l /usr/share/dtc-xen-hvm<br /> * sshfs dtcmirror@node00001.gigatux.com:/usr/share/dtc-xen-os/ /usr/share/dtc-xen-os/<br /> * sshfs dtcmirror@node00001.gigatux.com:/usr/share/dtc-xen-app/ /usr/share/dtc-xen-app/<br /> * sshfs dtcmirror@node00001.gigatux.com:/usr/share/dtc-xen-hvm/ /usr/share/dtc-xen-hvm/</div>

Cocodude