Misc Tips, TroubleShooting

Sending commands to LXD containers

Use bash -c "<command>" for commands with wildcards. i.e.

for machine in $(lxc list | grep RUNNING | awk '{print $2}') ;\
    do lxc exec "${machine}" -- bash -c "cat /etc/apt/apt.conf.d/02*" ; done

fish shell is actually a little bit cleaner

for machine in (lxc list | grep RUNNING | awk '{print $2}') ; \
    lxc exec $machine -- bash -c "cat /etc/apt/apt.conf.d/02*" ; end

# change all their time zones
for machine in (lxc list | grep RUNNING | awk '{print $2}') ; \
    lxc exec $machine -- bash -c "timedatectl set-timezone America/Los_Angeles" ; end
# check to see if anyone is logged in before rebooting
for machine in (lxc list | grep RUNNING | awk '{print $2}') ; echo ; \
    echo $machine ; lxc exec $machine -- bash -c "who" ; end

Move LXD container to another Server

# stop the container
lxc stop <container name>
# publish image of container to local *storage*
lxc publish <container name> --alias <image name>
# export the new image to tarball
lxc image export <image name>
# scp tarball to other box
scp a4762b114fecee2e2bc227b9032405642c5286c02009babef7953e011e597bfe.tar.gz server:
# on other box import the image
lxc image import <tarball file name> --alias <image name>
# launch container
lxc launch <image name> <container name>
# assign profile to container
lxc profile assign <container name> <profile name>

Shell into the new running container, update any network interface configurations that you need to, and then restart the container.

Ubuntu-Mate-Welcome-Center doesn't work some for some repos

Perhaps your apt-cacher-ng proxy server isn't configured to allow traffic through from https sources. Make sure the following is uncommented. This applies for all PPA's that use https.

# /etc/apt-cacher-ng/acng.conf
PassThroughPattern: .*