[lxc-users] sysvinit with cgroup namespace

[KATOH Yasufumi]

Sorry, I ran old version (2.0.0.rc7).

> My desktop is used sysvinit as init.

> I try using the "cgroup namespace", then a lxc container does not
> start.

> Now, If we have '/proc/self/ns/cgroup', then cgfsng is used as cgroup
> driver (in cgfsng_opt_init function). But in all_controllers_found
> function (in cgfsng.c), systemd cgroup ("name=systemd") must be exist.

> But on sysvinit environment, it doesn't exist, so a container is not
> started.

> lxc-start 20160406201046.399 INFO     lxc_cgroup - cgroup.c:cgroup_init:68 - cgroup driver cgroupfs-ng initing for ct01
> lxc-start 20160406201046.400 ERROR    lxc_cgfsng - cgfsng.c:all_controllers_found:431 - no systemd controller mountpoint found
> lxc-start 20160406201046.400 ERROR    lxc_start - start.c:lxc_spawn:1079 - failed initializing cgroup support
> lxc-start 20160406201046.434 ERROR    lxc_start - start.c:__lxc_start:1329 - failed to spawn 'ct01'

> Will we be able to start a container on sysvinit with cgroup namespace
> in the future release?

I tried 2.0.0.rc15.

I can't start a container with sysvinit regardless of whether cgroup
namespace is used.

lxc-start 20160406212027.095 INFO     lxc_cgroup - cgroup.c:cgroup_init:72 - cgroup driver cgroupfs-ng initing for ct01
lxc-start 20160406212027.096 ERROR    lxc_cgfsng - cgfsng.c:all_controllers_found:431 - no systemd controller mountpoint found
lxc-start 20160406212027.096 ERROR    lxc_start - start.c:lxc_spawn:1079 - failed initializing cgroup support
lxc-start 20160406212027.136 ERROR    lxc_start - start.c:__lxc_start:1329 - failed to spawn 'ct01'
lxc-start 20160406212027.136 WARN     lxc_commands - commands.c:lxc_cmd_rsp_recv:172 - command get_cgroup failed to receive response
lxc-start 20160406212032.141 ERROR    lxc_start_ui - lxc_start.c:main:344 - The container failed to start.
lxc-start 20160406212032.141 ERROR    lxc_start_ui - lxc_start.c:main:346 - To get more details, run the container in foreground mode.
lxc-start 20160406212032.141 ERROR    lxc_start_ui - lxc_start.c:main:348 - Additional information can be obtained by setting the --logfile and --logpriority options.

I read src/lxc/cgroup.c. At this version, I suppose that cgfsng driver
needs systemd, and cgroup_ops_init function always call
cgfsng_ops_init and always return cgfsng_ops when cgmanager is not used.

I guess sysvinit need cgfs driver when without cgmanager, but not
used. Will cgfs driver is called when any conditions?