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<p class="MsoNormal">Hi all,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I’ve seen many questions/issues came by and I decided to post the issue that I encountered.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Recently I tried updating the mgsnode IP address on a lustre node and although the command executed successfully, the old IP value remained.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Old value: <i>10.10.10.2</i> (points to a server that is not a mgsnode)<br>
New value: <i><span style="color:black">10.10.10.201@o2ib,10.10.10.202@o2ib,10.10.10.203@o2ib,10.10.10.204@o2ib</span></i><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Please find the command and output below:<o:p></o:p></p>
<p class="MsoNormal" style="vertical-align:baseline"><br>
<i><span style="color:black">[root@xxx ~]# tunefs.lustre --erase-param mgsnode --writeconf --mgsnode=10.10.10.201@o2ib,10.10.10.202@o2ib,10.10.10.203@o2ib,10.10.10.204@o2ib zfs_R10_nvme0-4/dne_mdt1<o:p></o:p></span></i></p>
<p class="MsoNormal" style="vertical-align:baseline"><i><span style="color:black">checking for existing Lustre data: found<o:p></o:p></span></i></p>
<p class="MsoNormal" style="vertical-align:baseline"><i><span style="color:black"> <o:p></o:p></span></i></p>
<p class="MsoNormal" style="vertical-align:baseline"><i><span style="color:black"> Read previous values:<o:p></o:p></span></i></p>
<p class="MsoNormal" style="vertical-align:baseline"><i><span style="color:black">Target: neohpfs-MDT0001<o:p></o:p></span></i></p>
<p class="MsoNormal" style="vertical-align:baseline"><i><span style="color:black">Index: 1<o:p></o:p></span></i></p>
<p class="MsoNormal" style="vertical-align:baseline"><i><span style="color:black">Lustre FS: neohpfs<o:p></o:p></span></i></p>
<p class="MsoNormal" style="vertical-align:baseline"><i><span style="color:black">Mount type: zfs<o:p></o:p></span></i></p>
<p class="MsoNormal" style="vertical-align:baseline"><i><span style="color:black">Flags: 0x1<o:p></o:p></span></i></p>
<p class="MsoNormal" style="vertical-align:baseline"><i><span style="color:black"> (MDT )<o:p></o:p></span></i></p>
<p class="MsoNormal" style="vertical-align:baseline"><i><span style="color:black">Persistent mount opts: <o:p></o:p></span></i></p>
<p class="MsoNormal" style="vertical-align:baseline"><i><span style="color:black">Parameters: mgsnode=10.10.10.2@o2ib<o:p></o:p></span></i></p>
<p class="MsoNormal" style="vertical-align:baseline"><i><span style="color:black"> <o:p></o:p></span></i></p>
<p class="MsoNormal" style="vertical-align:baseline"><i><span style="color:black"> Permanent disk data:<o:p></o:p></span></i></p>
<p class="MsoNormal" style="vertical-align:baseline"><i><span style="color:black">Target: neohpfs=MDT0001<o:p></o:p></span></i></p>
<p class="MsoNormal" style="vertical-align:baseline"><i><span style="color:black">Index: 1<o:p></o:p></span></i></p>
<p class="MsoNormal" style="vertical-align:baseline"><i><span style="color:black">Lustre FS: neohpfs<o:p></o:p></span></i></p>
<p class="MsoNormal" style="vertical-align:baseline"><i><span style="color:black">Mount type: zfs<o:p></o:p></span></i></p>
<p class="MsoNormal" style="vertical-align:baseline"><i><span style="color:black">Flags: 0x141<o:p></o:p></span></i></p>
<p class="MsoNormal" style="vertical-align:baseline"><i><span style="color:black"> (MDT update writeconf )<o:p></o:p></span></i></p>
<p class="MsoNormal" style="vertical-align:baseline"><i><span style="color:black">Persistent mount opts: <o:p></o:p></span></i></p>
<p class="MsoNormal" style="vertical-align:baseline"><i><span style="color:black">Parameters: mgsnode=:10.10.10.201@o2ib,10.10.10.202@o2ib,10.10.10.203@o2ib,10.10.10.204@o2ib<o:p></o:p></span></i></p>
<p class="MsoNormal" style="vertical-align:baseline"><i><span style="color:black">[root@xxx ~]# <o:p></o:p></span></i></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I did restart the lustre service thinking this would perhaps load the new value/config and although the service came up successfully, it still had not loaded the new value.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Appreciate any help, suggestions you can provide as to why the new value was not saved/loaded. In case I made a mistake, or I followed the incorrect step(s)/process than please, feel free to point that out.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Best Regards,<o:p></o:p></p>
<p class="MsoNormal">Ricardo<o:p></o:p></p>
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