Bionic verification was successfully done using the steps outlined in the bug description. The important parts are captured here: $ lxc exec lp1959047 -- apt-get install -y lxd Reading package lists... Done Building dependency tree Reading state information... Done The following additional packages will be installed: acl apparmor dns-root-data dnsmasq-base ebtables iptables libip6tc0 libiptc0 liblxc-common liblxc1 liblzo2-2 libnetfilter-conntrack3 libnfnetlink0 libuv1 lxcfs lxd-client rsync squashfs-tools uidmap xdelta3 Suggested packages: apparmor-profiles-extra apparmor-utils criu lxd-tools openssh-server The following NEW packages will be installed: acl apparmor dns-root-data dnsmasq-base ebtables iptables libip6tc0 libiptc0 liblxc-common liblxc1 liblzo2-2 libnetfilter-conntrack3 libnfnetlink0 libuv1 lxcfs lxd lxd-client rsync squashfs-tools uidmap xdelta3 0 upgraded, 21 newly installed, 0 to remove and 9 not upgraded. Need to get 10.9 MB of archives. After this operation, 41.3 MB of additional disk space will be used. Get:1 http://archive.ubuntu.com/ubuntu bionic/main amd64 libnfnetlink0 amd64 1.0.1-3 [13.3 kB] Get:2 http://archive.ubuntu.com/ubuntu bionic/main amd64 liblzo2-2 amd64 2.08-1.2 [48.7 kB] Get:3 http://archive.ubuntu.com/ubuntu bionic-updates/main amd64 apparmor amd64 2.12-4ubuntu5.1 [487 kB] Get:4 http://archive.ubuntu.com/ubuntu bionic/main amd64 libip6tc0 amd64 1.6.1-2ubuntu2 [19.9 kB] Get:5 http://archive.ubuntu.com/ubuntu bionic/main amd64 libiptc0 amd64 1.6.1-2ubuntu2 [9308 B] Get:6 http://archive.ubuntu.com/ubuntu bionic/main amd64 libnetfilter-conntrack3 amd64 1.0.6-2 [37.8 kB] Get:7 http://archive.ubuntu.com/ubuntu bionic/main amd64 iptables amd64 1.6.1-2ubuntu2 [269 kB] Get:8 http://archive.ubuntu.com/ubuntu bionic-updates/main amd64 rsync amd64 3.1.2-2.1ubuntu1.3 [335 kB] Get:9 http://archive.ubuntu.com/ubuntu bionic/main amd64 acl amd64 2.2.52-3build1 [38.5 kB] Get:10 http://archive.ubuntu.com/ubuntu bionic/main amd64 dns-root-data all 2018013001 [5360 B] Get:11 http://archive.ubuntu.com/ubuntu bionic-updates/main amd64 dnsmasq-base amd64 2.79-1ubuntu0.5 [307 kB] Get:12 http://archive.ubuntu.com/ubuntu bionic-updates/main amd64 ebtables amd64 2.0.10.4-3.5ubuntu2.18.04.3 [79.9 kB] Get:13 http://archive.ubuntu.com/ubuntu bionic-updates/main amd64 liblxc1 amd64 3.0.3-0ubuntu1~18.04.1 [264 kB] Get:14 http://archive.ubuntu.com/ubuntu bionic-updates/main amd64 liblxc-common amd64 3.0.3-0ubuntu1~18.04.1 [438 kB] Get:15 http://archive.ubuntu.com/ubuntu bionic/main amd64 libuv1 amd64 1.18.0-3 [64.4 kB] Get:16 http://archive.ubuntu.com/ubuntu bionic-updates/main amd64 lxcfs amd64 3.0.3-0ubuntu1~18.04.2 [39.0 kB] Get:17 http://archive.ubuntu.com/ubuntu bionic-proposed/main amd64 lxd-client amd64 3.0.3-0ubuntu1~18.04.2 [3025 kB] Get:18 http://archive.ubuntu.com/ubuntu bionic-updates/main amd64 squashfs-tools amd64 1:4.3-6ubuntu0.18.04.4 [111 kB] Get:19 http://archive.ubuntu.com/ubuntu bionic-proposed/main amd64 uidmap amd64 1:4.5-1ubuntu2.3 [68.0 kB] Get:20 http://archive.ubuntu.com/ubuntu bionic/main amd64 xdelta3 amd64 3.0.11-dfsg-1ubuntu1 [68.9 kB] Get:21 http://archive.ubuntu.com/ubuntu bionic-proposed/main amd64 lxd amd64 3.0.3-0ubuntu1~18.04.2 [5199 kB] Fetched 10.9 MB in 4s (2980 kB/s) ... Unpacking xdelta3 (3.0.11-dfsg-1ubuntu1) ... Selecting previously unselected package lxd. Preparing to unpack .../20-lxd_3.0.3-0ubuntu1~18.04.2_amd64.deb ... Adding system user `lxd' (UID 105) ... Adding new user `lxd' (UID 105) with group `nogroup' ... Creating home directory `/var/lib/lxd/' ... Adding group `lxd' (GID 109) ... Done. Unpacking lxd (3.0.3-0ubuntu1~18.04.2) ... ... Setting up liblxc1 (3.0.3-0ubuntu1~18.04.1) ... Setting up liblxc-common (3.0.3-0ubuntu1~18.04.1) ... apparmor.service is not active, cannot reload. invoke-rc.d: initscript apparmor, action "reload" failed. Setting up lxd (3.0.3-0ubuntu1~18.04.2) ... ... $ lxc exec lp1959047 -- lxc exec c1 -- journalctl -b0 --grep 'Failed to set up namespace' -- No entries -- So it worked, thanks!