<html><body><div style="font-family: arial, helvetica, sans-serif; font-size: 10pt; color: #333333"><div>Hi Everyone, <br></div><div><br data-mce-bogus="1"></div><div>I'm probably not fully grasping how LXC containers/snapshotting works, but why isn't the following possible?<br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div><table style="width: 70%; table-layout: fixed;" data-mce-style="width: 70%; table-layout: fixed;" cellpadding="3px" border="1px"><tbody><tr><td style="text-align: center;" data-mce-style="text-align: center;"><strong>Host</strong></td><td style="text-align: center;" data-mce-style="text-align: center;"><strong>Container</strong><br></td><td style="text-align: center;" data-mce-style="text-align: center;"><strong>Monday</strong><br data-mce-bogus="1"></td><td style="text-align: center;" data-mce-style="text-align: center;"><strong>Tuesday</strong><br></td><td style="text-align: center;" data-mce-style="text-align: center;"><strong>Wed</strong><br data-mce-bogus="1"></td><td style="text-align: center;" data-mce-style="text-align: center;"><strong>Thurs</strong><br></td></tr><tr><td style="text-align: center;" data-mce-style="text-align: center;">H1<br data-mce-bogus="1"></td><td style="text-align: center;" data-mce-style="text-align: center;">C1 (fresh Ubuntu)<br></td><td style="text-align: center;" data-mce-style="text-align: center;">SA (added apache)<br></td><td style="text-align: center;" data-mce-style="text-align: center;">SB (removed apache and added nginx)<br></td><td style="text-align: center;" data-mce-style="text-align: center;">SC (hardened nginx config)<br></td><td style="text-align: center;" data-mce-style="text-align: center;">Host dies<br></td></tr><tr><td style="text-align: center;" data-mce-style="text-align: center;">H2<br data-mce-bogus="1"></td><td style="text-align: center;" data-mce-style="text-align: center;">C2 (created from C1 Snapshot B)<br></td><td style="text-align: center;" data-mce-style="text-align: center;"><br></td><td style="text-align: center;" data-mce-style="text-align: center;"><br></td><td style="text-align: center;" data-mce-style="text-align: center;">SC (with hardened nginx config)<br></td><td style="text-align: center;" data-mce-style="text-align: center;"><br></td></tr></tbody></table></div><div data-marker="__SIG_PRE__"><div><br data-mce-bogus="1"></div><div>On Tuesday, I snapshot C1 (creating SB) and stop the container. I then jump on a new host (H2) and copy snapshot B: <br data-mce-bogus="1"></div><blockquote><div><strong>H2$ </strong> lxc copy H1:C1/SB C2<br></div></blockquote><div>At this point, my C2 is equivalent to C1 + SA + SB. Thus, I believe that C1 + SA + SB = C2<br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div>On Wednesday, I take Snapshot C on H1. <br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div>I believe that on Wednesday, after taking SC, I should be able to copy SC <strong>alone</strong> to H2. And then on Thursday, when H1 dies, I should be able to go to H2 and launch SC (C2 + SC) and have the same container I had on H! when I first took Snapshot C.<br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div>If I'm wrong, why am I wrong? If I'm right, how do I copy SC by itself (and not the whole container) to H2 on Wednesday?<br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div>Best Regards,</div><div><br></div><div style="text-align: left;"><img style="align: left;" src="https://www.robco.com/images/logo.jpg" data-mce-src="https://www.robco.com/images/logo.jpg" align="left"><strong>Lai Wei-Hwa</strong><br> <span style="font-size: 10pt;">IT Administrator</span><br> T. (514) 367-2252 ext 6308 C. (514) 218-7400 <a href="mailto:whlai@robco.com" target="_blank">whlai@robco.com</a><br> Montreal<strong><span style="color: #ff0000;"> -</span></strong> Toronto <strong><span style="color: #ff0000;">-</span></strong> Edmonton <a href="https://www.robco.com" target="_blank">www.robco.com</a><br><hr></div><div style="text-align: right;"><span style="color: #808080;">ISO 9001 / 14001</span></div><div style="text-align: left;"><br></div></div></div></body></html>