I need to rapidly spin up new cloud servers running an LXC image for a CI/CD pipeline. However, the way I’ve currently implemented things, it takes too long:
- Starting the underlying cloud server take about 20-30 sec
-
apt-get update && apt-get install -y --no-install-recommends lxdtakes another 45-60 sec. -
lxd init ...&&lxd remote add ...takes another 30 sec - finally,
lxd launch remote:...takes anywhere between 3-4 mins. This includes physically transferring a 4.5 GB image and then de-compressing/untarring it to get a 14 GB rootfs
I have the ability to parallelize these operations, so I was wondering if something like the following is possible. If yes, how?
- While
apt-get install lxdis running, can Iscpthe uncompressed rootfs from theremoteserver to some directory outside of/var/lib/lxd/storage-pools/default/containers/ - When
lxdis installed, can I start a container with the rootfs that I copied in the previous step?
The two machines have 3-4 Gbits/sec pipe (tested via iperf). So, theoretically, the uncompressed rootfs should get copied in about 40sec.