Comment 7 for bug 1546798

One small comment: I'm using
- Ubuntu source
- All-in-one
and I also have this problem.

DOCKER LOGS:
DEBU[0156] copying image data from ba7b8918b37a0274ef74d6e2550bfc76312a8d665844c44aeafe4a25726de348:/var/lib/neutron/kolla, to neutron_metadata_socket
DEBU[0156] Calling GET /v1.22/containers/json
DEBU[0156] GET /v1.22/containers/json?all=1&limit=-1&trunc_cmd=0&size=0
DEBU[0156] Calling POST /v1.22/containers/neutron_dhcp_agent/start
DEBU[0156] POST /v1.22/containers/neutron_dhcp_agent/start
DEBU[0156] form data: {}
DEBU[0156] container mounted via layerStore: /var/lib/docker/aufs/mnt/8ec90df91cdb2a4590f6bba4d31aa4c4158010650c5fe93224b028df0000880a
WARN[0156] Auto-creating non-existent volume host path /run/netns, this is deprecated and will be removed soon
ERRO[0157] error locating sandbox id 7fbffe1a9572be17d6202e6af0dfc6c93cf8c4cfc1cbef3498a71b6595aeccc3: sandbox 7fbffe1a9572be17d6202e6af0dfc6c93cf8c4cfc1cbef3498a71b6595aeccc3 not found
WARN[0157] failed to cleanup ipc mounts:
failed to umount /var/lib/docker/containers/ba7b8918b37a0274ef74d6e2550bfc76312a8d665844c44aeafe4a25726de348/shm: invalid argument
ERRO[0157] Error unmounting container ba7b8918b37a0274ef74d6e2550bfc76312a8d665844c44aeafe4a25726de348: not mounted
ERRO[0157] Handler for POST /v1.22/containers/neutron_dhcp_agent/start returned error: Cannot start container ba7b8918b37a0274ef74d6e2550bfc76312a8d665844c44aeafe4a25726de348: Path /run/netns is mounted on /run but it is not a shared mount.