Unable to start Lxc container on Android

Syed · March 22, 2021, 7:05am

Hi,

Lxc container on Android is not starting.
Please help. Below is the debug log.

lxc-start myContainerImage 20210317093031.625 INFO lxc-start myContainerImage 20210317093031.626 DEBUG lxc-start myContainerImage 20210317093031.626 DEBUG lxc-start myContainerImage 20210317093031.626 DEBUG lxc-start myContainerImage 20210317093031.627 WARN "
lxc-start myContainerImage 20210317093031.627 WARN "
lxc-start myContainerImage 20210317093031.627 WARN "
lxc-start myContainerImage 20210317093031.627 WARN "
lxc-start myContainerImage 20210317093031.627 WARN "
lxc-start myContainerImage 20210317093031.627 WARN "
lxc-start myContainerImage 20210317093031.627 INFO lxc-start myContainerImage 20210317093031.629 INFO lxc-start myContainerImage 20210317093031.629 INFO lxc-start myContainerImage 20210317093031.629 INFO lxc-start myContainerImage 20210317093031.629 INFO lxc-start myContainerImage 20210317093031.629 DEBUG lxc-start myContainerImage 20210317093031.629 DEBUG lxc-start myContainerImage 20210317093031.629 DEBUG lxc-start myContainerImage 20210317093031.629 DEBUG lxc-start myContainerImage 20210317093031.629 DEBUG lxc-start myContainerImage 20210317093031.629 DEBUG lxc-start myContainerImage 20210317093031.629 INFO lxc-start myContainerImage 20210317093031.630 DEBUG lxc-start myContainerImage 20210317093031.630 DEBUG lxc-start myContainerImage 20210317093031.630 INFO lxc-start myContainerImage 20210317093031.630 INFO lxc-start myContainerImage 20210317093031.632 INFO lxc-start myContainerImage 20210317093031.632 INFO lxc-start myContainerImage 20210317093031.632 DEBUG lxc-start myContainerImage 20210317093031.632 DEBUG lxc-start myContainerImage 20210317093031.632 DEBUG lxc-start myContainerImage 20210317093031.632 DEBUG lxc-start myContainerImage 20210317093031.632 DEBUG lxc-start myContainerImage 20210317093031.632 DEBUG lxc-start myContainerImage 20210317093031.632 INFO lxc-start myContainerImage 20210317093031.632 DEBUG lxc-start myContainerImage 20210317093031.632 DEBUG lxc-start myContainerImage 20210317093031.632 DEBUG lxc-start myContainerImage 20210317093031.632 DEBUG lxc-start myContainerImage 20210317093031.632 DEBUG lxc-start myContainerImage 20210317093031.632 DEBUG lxc-start myContainerImage 20210317093031.632 INFO lxc-start myContainerImage 20210317093031.632 DEBUG lxc-start myContainerImage 20210317093031.633 INFO lxc-start myContainerImage 20210317093031.650 DEBUG lxc-start myContainerImage 20210317093031.650 INFO lxc-start myContainerImage 20210317093031.650 DEBUG lxc-start myContainerImage 20210317093031.650 NOTICE lxc-start myContainerImage 20210317093031.666 DEBUG lxc-start myContainerImage 20210317093031.666 NOTICE lxc-start myContainerImage 20210317093031.666 DEBUG lxc-start myContainerImage 20210317093031.666 NOTICE lsm - external/lxc/src/lxc/lsm/lsm.c:lsm_init:50 - LSM security driver nop
terminal - external/lxc/src/lxc/terminal.c:lxc_terminal_peer_default:714 - Using terminal “/dev/tty” as proxy
terminal - external/lxc/src/lxc/terminal.c:lxc_terminal_signal_init:192 - Created signal fd 9
terminal - external/lxc/src/lxc/terminal.c:lxc_terminal_winsz:90 - Set window size to 211 columns and 53 rows
cgfsng - external/lxc/src/lxc/cgroups/cgfsng.c:cg_hybrid_get_controllers:746 - Found hierarchy not under /sys/fs/cgroup: "/dev/cg2_bpf rw,nosuid,nodev,noexec,relatime shared:8 - cgroup2 none rw
cgfsng - external/lxc/src/lxc/cgroups/cgfsng.c:cg_hybrid_get_controllers:746 - Found hierarchy not under /sys/fs/cgroup: "/dev/cpuctl rw,nosuid,nodev,noexec,relatime shared:10 - cgroup none rw,cpu
cgfsng - external/lxc/src/lxc/cgroups/cgfsng.c:cg_hybrid_get_controllers:746 - Found hierarchy not under /sys/fs/cgroup: "/acct rw,nosuid,nodev,noexec,relatime shared:11 - cgroup none rw,cpuacct
cgfsng - external/lxc/src/lxc/cgroups/cgfsng.c:cg_hybrid_get_controllers:746 - Found hierarchy not under /sys/fs/cgroup: "/dev/cpuset rw,nosuid,nodev,noexec,relatime shared:12 - cgroup none rw,cpuset,noprefix,release_agent=/sbin/cpuset_release_agent
cgfsng - external/lxc/src/lxc/cgroups/cgfsng.c:cg_hybrid_get_controllers:746 - Found hierarchy not under /sys/fs/cgroup: "/dev/memcg rw,nosuid,nodev,noexec,relatime shared:13 - cgroup none rw,memory
cgfsng - external/lxc/src/lxc/cgroups/cgfsng.c:cg_hybrid_get_controllers:746 - Found hierarchy not under /sys/fs/cgroup: "/dev/stune rw,nosuid,nodev,noexec,relatime shared:14 - cgroup none rw,schedtune
start - external/lxc/src/lxc/start.c:lxc_init:897 - Container “myContainerImage” is initialized
start - external/lxc/src/lxc/start.c:lxc_spawn:1692 - Cloned CLONE_NEWNS
start - external/lxc/src/lxc/start.c:lxc_spawn:1692 - Cloned CLONE_NEWPID
start - external/lxc/src/lxc/start.c:lxc_spawn:1692 - Cloned CLONE_NEWUTS
start - external/lxc/src/lxc/start.c:lxc_spawn:1692 - Cloned CLONE_NEWIPC
start - external/lxc/src/lxc/start.c:lxc_try_preserve_namespaces:196 - Preserved mnt namespace via fd 15
start - external/lxc/src/lxc/start.c:lxc_try_preserve_namespaces:196 - Preserved pid namespace via fd 16
start - external/lxc/src/lxc/start.c:do_start:1100 - do_start
start - external/lxc/src/lxc/start.c:lxc_try_preserve_namespaces:196 - Preserved uts namespace via fd 17
start - external/lxc/src/lxc/start.c:lxc_try_preserve_namespaces:196 - Preserved ipc namespace via fd 18
start - external/lxc/src/lxc/start.c:lxc_spawn:1746 - Preserved net namespace via fd 10
start - external/lxc/src/lxc/start.c:do_start:1243 - Unshared CLONE_NEWCGROUP
storage - external/lxc/src/lxc/storage/storage.c:get_storage_by_name:231 - Detected rootfs type “dir”
conf - external/lxc/src/lxc/conf.c:lxc_mount_rootfs:1332 - Mounted rootfs “/data/lxc/containers/myContainerImage/rootfs” onto “/data/lxc/rootfs” with options “(null)”
conf - external/lxc/src/lxc/conf.c:setup_utsname:791 - Set hostname to “myContainerImage”
conf - external/lxc/src/lxc/conf.c:mount_autodev:1118 - Preparing “/dev”
conf - external/lxc/src/lxc/conf.c:mount_autodev:1165 - Prepared “/dev”
conf - external/lxc/src/lxc/conf.c:lxc_fill_autodev:1209 - Populating “/dev”
conf - external/lxc/src/lxc/conf.c:lxc_fill_autodev:1224 - Created device node “/data/lxc/rootfs/dev/full”
conf - external/lxc/src/lxc/conf.c:lxc_fill_autodev:1224 - Created device node “/data/lxc/rootfs/dev/null”
conf - external/lxc/src/lxc/conf.c:lxc_fill_autodev:1224 - Created device node “/data/lxc/rootfs/dev/random”
conf - external/lxc/src/lxc/conf.c:lxc_fill_autodev:1224 - Created device node “/data/lxc/rootfs/dev/tty”
conf - external/lxc/src/lxc/conf.c:lxc_fill_autodev:1224 - Created device node “/data/lxc/rootfs/dev/urandom”
conf - external/lxc/src/lxc/conf.c:lxc_fill_autodev:1224 - Created device node “/data/lxc/rootfs/dev/zero”
conf - external/lxc/src/lxc/conf.c:lxc_fill_autodev:1286 - Populated “/dev”
conf - external/lxc/src/lxc/conf.c:mount_entry:2027 - Remounting “/system” on “/data/lxc/rootfs/system/” to respect bind or remount options
conf - external/lxc/src/lxc/conf.c:mount_entry:2048 - Flags for “/system” were 4101, required extra flags are 5
conf - external/lxc/src/lxc/conf.c:mount_entry:2102 - Mounted “/system” on “/data/lxc/rootfs/system/” with filesystem type “none”
conf - external/lxc/src/lxc/conf.c:mount_entry:2027 - Remounting “/vendor” on “/data/lxc/rootfs/vendor/” to respect bind or remount options
conf - external/lxc/src/lxc/conf.c:mount_entry:2048 - Flags for “/vendor” were 4097, required extra flags are 1
conf - external/lxc/src/lxc/conf.c:mount_entry:2102 - Mounted “/vendor” on “/data/lxc/rootfs/vendor/” with filesystem type “none”
conf - external/lxc/src/lxc/conf.c:mount_file_entries:2333 - Finished setting up mounts
conf - external/lxc/src/lxc/conf.c:lxc_setup_dev_console:1771 - Mounted pts device “/dev/pts/1” onto “/data/lxc/rootfs/dev/console”
utils - external/lxc/src/lxc/utils.c:lxc_mount_proc_if_needed:1253 - Mounted /proc in container for security transition
conf - external/lxc/src/lxc/conf.c:lxc_setup_devpts:1605 - No new devpts instance will be mounted since no pts devices are requested
conf - external/lxc/src/lxc/conf.c:lxc_setup_ttys:949 - Finished setting up 0 /dev/tty device(s)
conf - external/lxc/src/lxc/conf.c:setup_caps:2506 - Capabilities have been setup
conf - external/lxc/src/lxc/conf.c:lxc_setup:3692 - The container “myContainerImage” is set up
start - external/lxc/src/lxc/start.c:lxc_spawn:1821 - Preserved cgroup namespace via fd 19
utils - external/lxc/src/lxc/utils.c:lxc_setgroups:1400 - Dropped additional groups
start - external/lxc/src/lxc/start.c:do_start:1423 - Calling Start
start - external/lxc/src/lxc/start.c:start:2028 - Exec’ing “/sbin/init”

stgraber · March 22, 2021, 12:35pm

This doesn’t actually show any error suggesting that the issue may instead be the init process immediately crashing or something similar?

If LXC itself had failed, you’d see ERROR messages in there and you wouldn’t see that last line showing that LXC is handing things over to /sbin/init in the container.

Syed · March 23, 2021, 1:37pm

Yes, but the container is not getting started. And i don’t see any error also.

Once sbin/init starts we expect the below log.
" Started “/sbin/init” with pid ".

Could you suggest a way to debug this issue?

stgraber · March 23, 2021, 2:21pm

You’d probably want to start with lxc-start in the foreground and maximum logging (trace) setup to go into a separate file. That way you may get to see what the init process tells you.