build: Default size for the LXC disk is no longer enough

[hebasto]

My favorite configuration for gitian building is Linux Mint 19.1 (based on Ubuntu 18.04) with LXC 3.0.3.

Faced disk space issues. This gitian-builder patch works well:

diff --git a/bin/make-base-vm b/bin/make-base-vm
index 916c11f..152f8bc 100755
--- a/bin/make-base-vm
+++ b/bin/make-base-vm
@@ -264,7 +264,7 @@ if [ $LXC = "1" ]; then
       fi
     fi
   fi
-  dd if=/dev/zero of=$OUT-lxc bs=1M count=1 seek=10240
+  dd if=/dev/zero of=$OUT-lxc bs=1M count=1 seek=15360
   /sbin/mkfs.ext4 -F $OUT-lxc
   t=`mktemp -d gitian.XXXXXXXX`
   sudo mount $OUT-lxc $t

Refs:

• Reproducibility issue with 0.18.0rc1 #15541 (comment) and gitian: Improve error handling #15549 (comment) by @laanwj
• KVM --disksize option to grow target disk image devrandom/gitian-builder#172 by @luke-jr

[laanwj]

Tested ACK (well, I tested wih 12240 so this size should certainly be enough)

Edit: Eh, why didn't you open this PR on the gitian repository, there's nothing we can do with this here

[luke-jr]

Eh? make-base-vm doesn't work with bionic at all though...

[hebasto]

@laanwj

Eh, why didn't you open this PR on the gitian repository, there's nothing we can do with this her

I cannot reproduce the issue reliably.
Is it ok to increase LXC disk just for safety?

[hebasto]

devrandom/gitian-builder#212 has been merged now.