Seems there's a few discussions about ramfs and pivot [1], and apparently it's unsupported [2].
As a workaround you could try to place overlayfs on top of your ramfs [3], you'd then place both your lower and upper dir on ramfs - YMMV. Others may chime in with a different workaround, as I'm not sure if this would be the best way. Hope this helps Cal [1] https://www.google.co.uk/search?q=pivot_root+tmpfs [2] http://www.slax.org/blog/18438-initramfs-pivot-root-solution.html [3] http://askubuntu.com/questions/109413/how-do-i-use-overlayfs On Sat, Dec 14, 2013 at 7:18 AM, Qiang Huang <[email protected]>wrote: > Hi guys, > > I was trying to run a container from ramfs, to root filesystem is > rootfs(ramfs), the template is put onto a mounted disk whose fs is > ext3, and I got this error(I'll skip my config and version and os > and so on, I think they are not keys): > ... > lxc-start 1386999058.944 DEBUG lxc_conf - mountpoint for old rootfs is > '/usr/local/lib/lxc/rootfs/lxc_putold' > lxc-start 1386999058.944 ERROR lxc_conf - Invalid argument - pivot_root > syscall failed > lxc-start 1386999058.944 ERROR lxc_conf - failed to setup pivot root > lxc-start 1386999058.944 ERROR lxc_conf - failed to set rootfs for > 'hq91' > lxc-start 1386999058.944 ERROR lxc_start - failed to setup the container > lxc-start 1386999058.944 ERROR lxc_sync - invalid sequence number 1. > expected 2 > lxc-start 1386999058.952 ERROR lxc_start - failed to spawn 'hq91' > > I dug and figured out that pivot_root has some limitations with ramfs, > So is it possible to run a container from ramfs? And how can we do that? > > Any comments are appreciated. > > > > _______________________________________________ > lxc-users mailing list > [email protected] > http://lists.linuxcontainers.org/listinfo/lxc-users >
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