我的 CentOS LXC 容器在 Ubuntu 14.10 机器上无法启动。我认为问题在重启后开始，但我不确定。
在 yum 更新后，我遇到了类似的问题，当时 init 脚本被替换为不支持 LXC 的常规脚本。他们试图启动 udev 等... 但这次我在所有 CentOS 实例上都遇到了这个问题，即使是新创建的实例也是如此。
主机操作系统：Ubuntu14.10 64位
客户机操作系统：Centos 6.5 64位
root@ubuntu-mvutcovici:~# lxc-start --logfile stash-lxc.log --logpriority DEBUG -dn stash
lxc-start: lxc_start.c: main: 337 The container failed to start.
lxc-start: lxc_start.c: main: 339 To get more details, run the container in foreground mode.
lxc-start: lxc_start.c: main: 341 Additional information can be obtained by setting the --logfile and --logpriority options.
root@ubuntu-mvutcovici:~#
以下是 stash-lxc.log 文件的内容：
lxc-start 1416596262.928 INFO lxc_start_ui - lxc_start.c:main:265 - using rcfile /var/lib/lxc/stash/config
lxc-start 1416596262.928 WARN lxc_confile - confile.c:config_pivotdir:1685 - lxc.pivotdir is ignored. It will soon become an error.
lxc-start 1416596262.928 WARN lxc_log - log.c:lxc_log_init:316 - lxc_log_init called with log already initialized
lxc-start 1416596262.929 INFO lxc_start - start.c:lxc_check_inherited:209 - closed inherited fd 4
lxc-start 1416596262.934 INFO lxc_lsm - lsm/lsm.c:lsm_init:48 - LSM security driver AppArmor
lxc-start 1416596262.934 INFO lxc_seccomp - seccomp.c:parse_config_v2:285 - processing: .[all].
lxc-start 1416596262.934 INFO lxc_seccomp - seccomp.c:parse_config_v2:285 - processing: .kexec_load errno 1.
lxc-start 1416596262.934 INFO lxc_seccomp - seccomp.c:parse_config_v2:358 - Adding non-compat rule for kexec_load action 327681
lxc-start 1416596262.934 INFO lxc_seccomp - seccomp.c:parse_config_v2:369 - Adding compat rule for kexec_load action 327681
lxc-start 1416596262.934 INFO lxc_seccomp - seccomp.c:parse_config_v2:382 - Really adding compat rule bc nr1 == nr2 (283, 246)
lxc-start 1416596262.934 INFO lxc_seccomp - seccomp.c:parse_config_v2:285 - processing: .open_by_handle_at errno 1.
lxc-start 1416596262.934 INFO lxc_seccomp - seccomp.c:parse_config_v2:358 - Adding non-compat rule for open_by_handle_at action 327681
lxc-start 1416596262.934 INFO lxc_seccomp - seccomp.c:parse_config_v2:369 - Adding compat rule for open_by_handle_at action 327681
lxc-start 1416596262.934 INFO lxc_seccomp - seccomp.c:parse_config_v2:382 - Really adding compat rule bc nr1 == nr2 (342, 304)
lxc-start 1416596262.934 INFO lxc_seccomp - seccomp.c:parse_config_v2:285 - processing: .init_module errno 1.
lxc-start 1416596262.934 INFO lxc_seccomp - seccomp.c:parse_config_v2:358 - Adding non-compat rule for init_module action 327681
lxc-start 1416596262.934 INFO lxc_seccomp - seccomp.c:parse_config_v2:369 - Adding compat rule for init_module action 327681
lxc-start 1416596262.934 INFO lxc_seccomp - seccomp.c:parse_config_v2:382 - Really adding compat rule bc nr1 == nr2 (128, 175)
lxc-start 1416596262.934 INFO lxc_seccomp - seccomp.c:parse_config_v2:285 - processing: .finit_module errno 1.
lxc-start 1416596262.934 INFO lxc_seccomp - seccomp.c:parse_config_v2:358 - Adding non-compat rule for finit_module action 327681
lxc-start 1416596262.934 WARN lxc_seccomp - seccomp.c:do_resolve_add_rule:196 - Seccomp: got negative # for syscall: finit_module
lxc-start 1416596262.934 WARN lxc_seccomp - seccomp.c:do_resolve_add_rule:197 - This syscall will NOT be blacklisted
lxc-start 1416596262.934 INFO lxc_seccomp - seccomp.c:parse_config_v2:369 - Adding compat rule for finit_module action 327681
lxc-start 1416596262.934 INFO lxc_seccomp - seccomp.c:parse_config_v2:377 - Adding non-compat rule bc nr1 == nr2 (-10085, -10085)
lxc-start 1416596262.934 WARN lxc_seccomp - seccomp.c:do_resolve_add_rule:196 - Seccomp: got negative # for syscall: finit_module
lxc-start 1416596262.934 WARN lxc_seccomp - seccomp.c:do_resolve_add_rule:197 - This syscall will NOT be blacklisted
lxc-start 1416596262.934 INFO lxc_seccomp - seccomp.c:parse_config_v2:285 - processing: .delete_module errno 1.
lxc-start 1416596262.934 INFO lxc_seccomp - seccomp.c:parse_config_v2:358 - Adding non-compat rule for delete_module action 327681
lxc-start 1416596262.934 INFO lxc_seccomp - seccomp.c:parse_config_v2:369 - Adding compat rule for delete_module action 327681
lxc-start 1416596262.935 INFO lxc_seccomp - seccomp.c:parse_config_v2:382 - Really adding compat rule bc nr1 == nr2 (129, 176)
lxc-start 1416596262.935 INFO lxc_seccomp - seccomp.c:parse_config_v2:390 - Merging in the compat seccomp ctx into the main one
lxc-start 1416596262.935 DEBUG lxc_conf - conf.c:lxc_create_tty:3504 - allocated pty '/dev/pts/2' (5/6)
lxc-start 1416596262.935 DEBUG lxc_conf - conf.c:lxc_create_tty:3504 - allocated pty '/dev/pts/4' (7/8)
lxc-start 1416596262.935 DEBUG lxc_conf - conf.c:lxc_create_tty:3504 - allocated pty '/dev/pts/5' (9/10)
lxc-start 1416596262.935 DEBUG lxc_conf - conf.c:lxc_create_tty:3504 - allocated pty '/dev/pts/7' (11/12)
lxc-start 1416596262.935 INFO lxc_conf - conf.c:lxc_create_tty:3515 - tty's configured
lxc-start 1416596262.935 DEBUG lxc_start - start.c:setup_signal_fd:247 - sigchild handler set
lxc-start 1416596262.935 DEBUG lxc_console - console.c:lxc_console_peer_default:536 - no console peer
lxc-start 1416596262.935 INFO lxc_start - start.c:lxc_init:443 - 'stash' is initialized
lxc-start 1416596262.936 DEBUG lxc_start - start.c:__lxc_start:1061 - Not dropping cap_sys_boot or watching utmp
lxc-start 1416596262.936 INFO lxc_start - start.c:lxc_check_inherited:209 - closed inherited fd 4
lxc-start 1416596262.940 INFO lxc_monitor - monitor.c:lxc_monitor_sock_name:177 - using monitor sock name lxc/ad055575fe28ddd5//var/lib/lxc
lxc-start 1416596262.943 DEBUG lxc_conf - conf.c:instanciate_veth:2842 - instanciated veth 'vethF4JUT8/vethVOPS0P', index is '11'
lxc-start 1416596262.943 INFO lxc_cgroup - cgroup.c:cgroup_init:62 - cgroup driver cgmanager initing for stash
lxc-start 1416596262.948 INFO lxc_cgmanager - cgmanager.c:cgm_setup_limits:1241 - cgroup limits have been setup
lxc-start 1416596262.977 DEBUG lxc_conf - conf.c:lxc_assign_network:3259 - move '(null)' to '11664'
lxc-start 1416596262.978 DEBUG lxc_conf - conf.c:setup_rootfs:1536 - mounted '/var/lib/lxc/stash/rootfs' on '/usr/lib/x86_64-linux-gnu/lxc'
lxc-start 1416596262.978 INFO lxc_conf - conf.c:setup_utsname:896 - 'stash' hostname has been setup
lxc-start 1416596263.005 DEBUG lxc_conf - conf.c:setup_hw_addr:2392 - mac address 'fe:fb:95:37:ac:3c' on 'eth0' has been setup
lxc-start 1416596263.005 DEBUG lxc_conf - conf.c:setup_netdev:2619 - 'eth0' has been setup
lxc-start 1416596263.005 INFO lxc_conf - conf.c:setup_network:2640 - network has been setup
lxc-start 1416596263.005 INFO lxc_conf - conf.c:setup_ttydir_console:1688 - created /usr/lib/x86_64-linux-gnu/lxc/dev/lxc
lxc-start 1416596263.005 INFO lxc_conf - conf.c:setup_ttydir_console:1734 - console has been setup on lxc/console
lxc-start 1416596263.006 INFO lxc_conf - conf.c:setup_tty:1023 - 4 tty(s) has been setup
lxc-start 1416596263.006 INFO lxc_conf - conf.c:do_tmp_proc_mount:3809 - I am 1, /proc/self points to '1'
lxc-start 1416596263.029 DEBUG lxc_conf - conf.c:setup_rootfs_pivot_root:1078 - pivot_root syscall to '/usr/lib/x86_64-linux-gnu/lxc' successful
lxc-start 1416596263.029 INFO lxc_conf - conf.c:setup_pts:1605 - created new pts instance
lxc-start 1416596263.029 INFO lxc_conf - conf.c:setup_personality:1622 - set personality to '0x0'
lxc-start 1416596263.029 DEBUG lxc_conf - conf.c:setup_caps:2303 - drop capability 'mac_admin' (33)
lxc-start 1416596263.029 DEBUG lxc_conf - conf.c:setup_caps:2303 - drop capability 'mac_override' (32)
lxc-start 1416596263.029 DEBUG lxc_conf - conf.c:setup_caps:2303 - drop capability 'sys_time' (25)
lxc-start 1416596263.029 DEBUG lxc_conf - conf.c:setup_caps:2303 - drop capability 'sys_module' (16)
lxc-start 1416596263.029 DEBUG lxc_conf - conf.c:setup_caps:2303 - drop capability 'setfcap' (31)
lxc-start 1416596263.029 DEBUG lxc_conf - conf.c:setup_caps:2303 - drop capability 'setpcap' (8)
lxc-start 1416596263.029 DEBUG lxc_conf - conf.c:setup_caps:2303 - drop capability 'sys_nice' (23)
lxc-start 1416596263.029 DEBUG lxc_conf - conf.c:setup_caps:2303 - drop capability 'sys_pacct' (20)
lxc-start 1416596263.029 DEBUG lxc_conf - conf.c:setup_caps:2303 - drop capability 'sys_rawio' (17)
lxc-start 1416596263.029 DEBUG lxc_conf - conf.c:setup_caps:2312 - capabilities have been setup
lxc-start 1416596263.029 NOTICE lxc_conf - conf.c:lxc_setup:4144 - 'stash' is setup.
lxc-start 1416596263.029 DEBUG lxc_cgmanager - cgmanager.c:cgm_setup_limits:1237 - cgroup 'devices.deny' set to 'a'
lxc-start 1416596263.029 DEBUG lxc_cgmanager - cgmanager.c:cgm_setup_limits:1237 - cgroup 'devices.allow' set to 'c *:* m'
lxc-start 1416596263.030 DEBUG lxc_cgmanager - cgmanager.c:cgm_setup_limits:1237 - cgroup 'devices.allow' set to 'b *:* m'
lxc-start 1416596263.030 DEBUG lxc_cgmanager - cgmanager.c:cgm_setup_limits:1237 - cgroup 'devices.allow' set to 'c 1:3 rwm'
lxc-start 1416596263.030 DEBUG lxc_cgmanager - cgmanager.c:cgm_setup_limits:1237 - cgroup 'devices.allow' set to 'c 1:5 rwm'
lxc-start 1416596263.030 DEBUG lxc_cgmanager - cgmanager.c:cgm_setup_limits:1237 - cgroup 'devices.allow' set to 'c 1:7 rwm'
lxc-start 1416596263.031 DEBUG lxc_cgmanager - cgmanager.c:cgm_setup_limits:1237 - cgroup 'devices.allow' set to 'c 5:0 rwm'
lxc-start 1416596263.031 DEBUG lxc_cgmanager - cgmanager.c:cgm_setup_limits:1237 - cgroup 'devices.allow' set to 'c 5:1 rwm'
lxc-start 1416596263.031 DEBUG lxc_cgmanager - cgmanager.c:cgm_setup_limits:1237 - cgroup 'devices.allow' set to 'c 5:2 rwm'
lxc-start 1416596263.031 DEBUG lxc_cgmanager - cgmanager.c:cgm_setup_limits:1237 - cgroup 'devices.allow' set to 'c 1:8 rwm'
lxc-start 1416596263.031 DEBUG lxc_cgmanager - cgmanager.c:cgm_setup_limits:1237 - cgroup 'devices.allow' set to 'c 1:9 rwm'
lxc-start 1416596263.031 DEBUG lxc_cgmanager - cgmanager.c:cgm_setup_limits:1237 - cgroup 'devices.allow' set to 'c 136:* rwm'
lxc-start 1416596263.031 INFO lxc_cgmanager - cgmanager.c:cgm_setup_limits:1241 - cgroup limits have been setup
lxc-start 1416596263.031 ERROR lxc_apparmor - lsm/apparmor.c:mount_feature_enabled:61 - Permission denied - Error mounting securityfs
lxc-start 1416596263.032 WARN lxc_apparmor - lsm/apparmor.c:apparmor_process_label_set:184 - Incomplete AppArmor support in your kernel
lxc-start 1416596263.032 ERROR lxc_apparmor - lsm/apparmor.c:apparmor_process_label_set:186 - If you really want to start this container, set
lxc-start 1416596263.032 ERROR lxc_apparmor - lsm/apparmor.c:apparmor_process_label_set:187 - lxc.aa_allow_incomplete = 1
lxc-start 1416596263.032 ERROR lxc_apparmor - lsm/apparmor.c:apparmor_process_label_set:188 - in your container configuration file
lxc-start 1416596263.032 ERROR lxc_sync - sync.c:__sync_wait:51 - invalid sequence number 1. expected 4
lxc-start 1416596263.032 ERROR lxc_start - start.c:__lxc_start:1087 - failed to spawn 'stash'
lxc-start 1416596263.032 WARN lxc_commands - commands.c:lxc_cmd_rsp_recv:172 - command get_init_pid failed to receive response
lxc-start 1416596263.032 ERROR lxc_cgmanager - cgmanager.c:cgm_remove_cgroup:503 - call to cgmanager_remove_sync failed: invalid request
lxc-start 1416596263.032 ERROR lxc_cgmanager - cgmanager.c:cgm_remove_cgroup:505 - Error removing name=systemd:lxc/stash-3
lxc-start 1416596263.032 WARN lxc_cgmanager - cgmanager.c:cgm_get:946 - do_cgm_get exited with error
lxc-start 1416596263.032 ERROR lxc_cgmanager - cgmanager.c:cgm_remove_cgroup:503 - call to cgmanager_remove_sync failed: invalid request
lxc-start 1416596263.032 ERROR lxc_cgmanager - cgmanager.c:cgm_remove_cgroup:505 - Error removing perf_event:lxc/stash-3
lxc-start 1416596263.033 ERROR lxc_cgmanager - cgmanager.c:cgm_remove_cgroup:503 - call to cgmanager_remove_sync failed: invalid request
lxc-start 1416596263.033 ERROR lxc_cgmanager - cgmanager.c:cgm_remove_cgroup:505 - Error removing net_prio:lxc/stash-3
lxc-start 1416596263.033 ERROR lxc_cgmanager - cgmanager.c:cgm_remove_cgroup:503 - call to cgmanager_remove_sync failed: invalid request
lxc-start 1416596263.033 ERROR lxc_cgmanager - cgmanager.c:cgm_remove_cgroup:505 - Error removing net_cls:lxc/stash-3
lxc-start 1416596263.033 ERROR lxc_cgmanager - cgmanager.c:cgm_remove_cgroup:503 - call to cgmanager_remove_sync failed: invalid request
lxc-start 1416596263.033 ERROR lxc_cgmanager - cgmanager.c:cgm_remove_cgroup:505 - Error removing memory:lxc/stash-3
lxc-start 1416596263.033 ERROR lxc_cgmanager - cgmanager.c:cgm_remove_cgroup:503 - call to cgmanager_remove_sync failed: invalid request
lxc-start 1416596263.033 ERROR lxc_cgmanager - cgmanager.c:cgm_remove_cgroup:505 - Error removing hugetlb:lxc/stash-3
lxc-start 1416596263.033 ERROR lxc_cgmanager - cgmanager.c:cgm_remove_cgroup:503 - call to cgmanager_remove_sync failed: invalid request
lxc-start 1416596263.033 ERROR lxc_cgmanager - cgmanager.c:cgm_remove_cgroup:505 - Error removing freezer:lxc/stash-3
lxc-start 1416596263.034 ERROR lxc_cgmanager - cgmanager.c:cgm_remove_cgroup:503 - call to cgmanager_remove_sync failed: invalid request
lxc-start 1416596263.034 ERROR lxc_cgmanager - cgmanager.c:cgm_remove_cgroup:505 - Error removing devices:lxc/stash-3
lxc-start 1416596263.034 ERROR lxc_cgmanager - cgmanager.c:cgm_remove_cgroup:503 - call to cgmanager_remove_sync failed: invalid request
lxc-start 1416596263.034 ERROR lxc_cgmanager - cgmanager.c:cgm_remove_cgroup:505 - Error removing cpuset:lxc/stash-3
lxc-start 1416596263.034 ERROR lxc_cgmanager - cgmanager.c:cgm_remove_cgroup:503 - call to cgmanager_remove_sync failed: invalid request
lxc-start 1416596263.034 ERROR lxc_cgmanager - cgmanager.c:cgm_remove_cgroup:505 - Error removing cpuacct:lxc/stash-3
lxc-start 1416596263.034 ERROR lxc_cgmanager - cgmanager.c:cgm_remove_cgroup:503 - call to cgmanager_remove_sync failed: invalid request
lxc-start 1416596263.034 ERROR lxc_cgmanager - cgmanager.c:cgm_remove_cgroup:505 - Error removing cpu:lxc/stash-3
lxc-start 1416596263.035 ERROR lxc_cgmanager - cgmanager.c:cgm_remove_cgroup:503 - call to cgmanager_remove_sync failed: invalid request
lxc-start 1416596263.035 ERROR lxc_cgmanager - cgmanager.c:cgm_remove_cgroup:505 - Error removing blkio:lxc/stash-3
lxc-start 1416596268.038 ERROR lxc_start_ui - lxc_start.c:main:337 - The container failed to start.
lxc-start 1416596268.038 ERROR lxc_start_ui - lxc_start.c:main:339 - To get more details, run the container in foreground mode.
lxc-start 1416596268.038 ERROR lxc_start_ui - lxc_start.c:main:341 - Additional information can be obtained by setting the --logfile and --logpriority options.
要创建我使用过的所有 CentOS 实例：
root@ubuntu-mvutcovici:~# lxc-create -t centos -f lxc-mircea.conf -n stash
root@ubuntu-mvutcovici:~# cat lxc-mircea.conf
lxc.network.type = veth
lxc.network.link = br0
lxc.network.flags = up
编辑：似乎添加lxc.aa_allow_incomplete = 1到 /var/lib/lxc/stash/config 文件是解决启动问题的一种解决方法。如何让 app armor 再次与 CentOS LXC 共存？
来自 lxc.container.conf 手册页：
lxc.aa_allow_incomplete
Apparmor profiles are pathname based. Therefore many file restrictions require mount restrictions to be effective against a determined attacker. However, these mount restrictions are not yet implemented in the
upstream kernel. Without the mount restrictions, the apparmor profiles still protect against accidental damager.
If this flag is 0 (default), then the container will not be started if the kernel lacks the apparmor mount features, so that a regression after a kernel upgrade will be detected. To start the container under partial
apparmor protection, set this flag to 1.
编辑2：添加了原始的 /var/lib/lxc/stash/config 文件：
# Template used to create this container: /usr/share/lxc/templates/lxc-centos
# Parameters passed to the template:
# For additional config options, please look at lxc.container.conf(5)
lxc.network.type = veth
lxc.network.link = br0
lxc.network.hwaddr = fe:98:41:37:ca:3d
lxc.network.flags = up
lxc.rootfs = /var/lib/lxc/stash/rootfs
# Include common configuration
lxc.include = /usr/share/lxc/config/centos.common.conf
lxc.arch = x86_64
lxc.utsname = stash
lxc.autodev = 0
# When using LXC with apparmor, uncomment the next line to run unconfined:
#lxc.aa_profile = unconfined
# example simple networking setup, uncomment to enable
#lxc.network.type = veth
#lxc.network.flags = up
#lxc.network.link = lxcbr0
#lxc.network.name = eth0
# Additional example for veth network type
# static MAC address,
#lxc.network.hwaddr = 00:16:3e:77:52:20
# persistent veth device name on host side
# Note: This may potentially collide with other containers of same name!
#lxc.network.veth.pair = v-stash-e0
答案1
这听起来就像你偶然发现了一个漏洞。引用的链接指向一个有助于防止这些 AppArmor 故障的补丁。但是，您需要知道如何从源代码编译 LXC 才能使用它。我不确定这个补丁是否已经进入二进制文件。
答案2
解决方法是将其附加lxc.aa_allow_incomplete = 1到/var/lib/lxc/[container-name]/config文件中。
此设置将降低 apparmor 提供的安全性。这是手册页的摘录lxc.container.conf(5)。
lxc.aa_allow_incomplete
Apparmor profiles are pathname based. Therefore many file
restrictions require mount restrictions to be effective
against a determined attacker. However, these mount
restrictions are not yet implemented in the upstream kernel.
Without the mount restrictions, the apparmor profiles still
protect against accidental damager.
If this flag is 0 (default), then the container will not be
started if the kernel lacks the apparmor mount features, so
that a regression after a kernel upgrade will be detected. To
start the container under partial apparmor protection, set
this flag to 1.
答案3
将 Ubuntu 14.4 升级到 16.x 后，按照更新和升级系统的步骤操作。这样我就可以再次启动我的 lxc 容器了。apt-get update apt-get upgrade