lxc-clone: maintain size of lvm snapshot

When creating a container as lvm snapshot, use the original size unless user explicitly overrides it. It's all well and good to day "use lvextend if you run out of space", but in the meantime applications may become corrupted... Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com> Signed-off-by: Daniel Lezcano <dlezcano@fr.ibm.com>

lxc-clone: maintain size of lvm snapshot
93f29214 · Serge Hallyn · Daniel Lezcano · 96bd45c8 · 93f29214
Commit 93f29214 authored Jul 31, 2012 by Serge Hallyn Committed by Daniel Lezcano Jul 31, 2012
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lxc-clone.in src/lxc/lxc-clone.in +5 -1

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--- a/src/lxc/lxc-clone.in
+++ b/src/lxc/lxc-clone.in
@@ -50,7 +50,8 @@ localstatedir=@LOCALSTATEDIR@
 lxc_path=@LXCPATH@
 bindir=@BINDIR@
 snapshot=no
-lxc_size=2G
+lxc_defsize=2G
+lxc_size=_unset
 lxc_vg=lxc
 lxc_lv_prefix=""
 fstype=ext3
@@ -199,6 +200,9 @@ if [ -b $oldroot ]; then
        lxc-freeze -n $lxc_orig
        frozen=1
    fi
+    if [ $lxc_size = "_unset" ]; then
+        lxc_size=`lvdisplay $oldroot | grep Size | awk '{ print $3 $4 }'`
+    fi
    lvcreate -s -L $lxc_size -n ${lxc_lv_prefix}${lxc_new}_snapshot $oldroot
    if [ $container_running = "True" ]; then
        lxc-unfreeze -n $lxc_orig